Abstract

The present invention relates to a resin composition and a manufacturing method, which are capable of obtaining a thiourethane-based optical material by reacting a polythiol compound having three or more mercapto groups and a polyisocyanate compound, and, specifically, to a resin composition and a manufacturing method, which are capable of manufacturing a high-quality ultrahigh-refractive-index thiourethane-based optical material by controlling a polymerization rate through an additive while reducing an effect according to the quality of a polythiol compound so as to lower manufacturing costs. The present invention provides a resin composition for a thiourethane-based optical material, comprising: (a) a polythiol compound having three or more mercapto groups; (b) a polyisocyanate compound; and (c) a catechol compound represented by chemical formula 1, wherein the catechol compound is included in an amount of 0.05-5 wt% on the basis of 100 wt% of the composition, the amount being the sum of (a), (b) and (c). The present invention can manufacture a high-quality ultrahigh-refractive-index thiourethane-based optical material while simplifying a process for producing a polythiol compound that has three or more mercapto groups and reducing production costs, and thus can be widely used in the optical lens field.

IPC Classes  ?

• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/32 - Polyhydroxy compoundsPolyaminesHydroxy amines
• C08G 18/73 - Polyisocyanates or polyisothiocyanates acyclic
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a benzotriazole-based compound which improves the light resistance of a highly refractive episulfide-based optical material, a composition for an episulfide-based optical material, comprising same, and an optical material. The present invention provides a composition for an episulfide-based optical material, the composition comprising an episulfide compound represented by chemical formula 1, a benzotriazole-based compound represented by chemical formula 2, and a polymerization catalyst. The benzotriazole-based compound of chemical formula 2 addresses the problem of deterioration in light resistance that occurs in optical lenses of a highly refractive episulfide-based optical material and the like, and can improve the transparency of lenses. In the present invention, by comprising a small amount of the benzotriazole-based compound in the composition for an episulfide-based optical material, an episulfide-based optical material having good light resistance and transparency can be obtained.

IPC Classes  ?

• C08G 75/06 - Polythioethers from cyclic thioethers
• C08K 5/3475 - Five-membered rings condensed with carbocyclic rings
• C08K 3/06 - Sulfur
• C08K 5/37 - Thiols
• C08K 5/29 - Compounds containing carbon-to-nitrogen double bonds
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a composition for an optical material in which a rapid curing phenomenon that occurs during polymerization in an episulfide-based high refractive optical material is suppressed, and to a method for manufacturing an optical material using same. Provided in the present invention is a composition for an episulfide-based high refractive index optical material comprising an episulfide compound represented by formula 1, a 2,3-epoxypropyl (2,3-epithiopropyl) sulfide compound, a catechol compound, and a quaternary phosphonium salt as a polymerization catalyst. The composition of the present invention can prevent a sudden increase in viscosity during polymerization in an episulfide-based high refractive index optical material and maintain a constant curing rate, and thus can be used as a high-quality lens material free of polymerization imbalance issues.

IPC Classes  ?

• C07D 331/02 - Three-membered rings
• C07D 409/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
• C08G 75/06 - Polythioethers from cyclic thioethers
• C08K 3/06 - Sulfur
• C08K 5/37 - Thiols
• C08K 5/29 - Compounds containing carbon-to-nitrogen double bonds
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to: a composition for an optical material, in which a rapid curing phenomenon occurring upon polymerization of a highly refractive episulfide-based optical material is restrained; and a method for manufacturing an optical material by using same. The present invention provides a composition for a highly refractive episulfide-based optical material, which comprises: an episulfide compound represented by chemical formula 1; a 2,3-epoxypropyl(2,3-epithiopropyl)sulfide compound; a catechol compound; and a quaternary phosphonium salt as a polymerization catalyst. The composition of the present invention can be prevented from the rapid viscosity increase occurring upon polymerization of a highly refractive episulfide-based optical material and can maintain a constant curing rate, thereby being available as a material for a high-quality lens having no polymerization imbalance problem.

IPC Classes  ?

• C08G 75/06 - Polythioethers from cyclic thioethers
• C08G 75/14 - Polysulfides
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a composition for an episulfide-based high refractive optical material and a method for manufacturing an optical material using same and, in particular, to a composition for an episulfide-based high refractive optical material having a refractive index in the range of 1.71 to 1.77 that contains sulfur without using a polymerization regulator, such as tin halide, but does not have color deterioration or a polymerization imbalance, and does not have deterioration of thermal stability, light resistance, and releasability, and a method for manufacturing an optical material using same. The present invention provides a composition for an episulfide-based high refractive optical material having a refractive index in the range of 1.71 to 1.77 comprising: 70- 92% by weight of an episulfide compound represented by chemical formula 1; 4-20% by weight of a polythiol compound; 2-9% by weight of solid sulfur; 0.01-5% by weight of an isocyanate compound; and 0.05-2% by weight of one or more polymerization catalysts selected from quaternary phosphonium salt and a tertiary amine compound.

IPC Classes  ?

• C08G 75/06 - Polythioethers from cyclic thioethers
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
• C08K 3/06 - Sulfur
• C08K 5/372 - Sulfides
• C08K 5/17 - AminesQuaternary ammonium compounds
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a novel episulfide compound, a composition containing same for an episulfide-based optical material, and a method for manufacturing an optical material, wherein the novel episulfide compound is contained at a small amount in the composition for an episulfide-based optical material to be capable of improving light fastness, heat resistance, and transparency of the optical material. The present invention provides a composition for an episulfide-based optical material, comprising an episulfide compound represented by chemical formula 2, an episulfide compound represented by chemical formula 1, a polythiol compound, and a polymerizing catalyst.

IPC Classes  ?

• C07D 409/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

In the present invention, sealing tape is wrapped around the outer circumferential surface of an introduced mold, and a monomer solution is injected into a cavity formed therein, wherein the injection amount of the monomer solution can be precisely controlled by using a vision recognition system. According to a preferable embodiment, a monomer solution (S) of a monomer solution tank (10) is suctioned, in advance, into a syringe (20) capable of adjusting a capacity corresponding to a cavity of a mold (M); most of the monomer solution (S), which has been injected into the syringe (20), is firstly injected into the mold (M) at a high injection flow rate or injection speed; while the residual amount of the monomer solution (S) is secondly injected at a reduced injection flow rate or injection speed, it is finally confirmed, by using a vision recognition system, whether the monomer solution (S) is filled in the mold (M); and then injection is finished.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated

Abstract

In the present invention, a tape is wrapped around the outer peripheral surface of an injected mold, and a monomer solution is injected into a cavity formed therebetween, wherein the oil level change of the monomer solution injected into the cavity is filmed using a vision recognition system such that the injection flow rate or injection speed of the monomer solution can be minutely controlled using the vision recognition system, and while a controller controls the injection flow rate or injection speed of a monomer injector at each step according to the monomer solution oil level change filmed by the vision recognition system, the monomer solution can be injected to fill in the cavity.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• B29C 39/24 - Feeding the material into the mould
• B29C 39/44 - Measuring, controlling or regulating
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated

Abstract

The present invention relates to a highly refractive episulfide-based optical material stabilizer which can resolve striae, color and thermal stability issues that arise in highly refractive episulfide-based optical material, an optical material composition comprising the highly refractive episulfide-based optical material stabilizer, and a method for producing the optical material. The present invention provides an episulfide-based optical material stabilizer comprising the episulfide compound expressed by chemical formula 1. Moreover, provided is an episulfide-based optical material composition comprising the episulfide compound expressed by chemical formula 2, the stabilizer, and the like. By including the stabilizer in the episulfide-based optical material composition, the present invention can resolve, by means of a relatively simple method, the issues of striae, color and thermal stability that occasionally arise in highly refractive episulfide-based optical lenses.

IPC Classes  ?

• C08K 5/45 - Heterocyclic compounds having sulfur in the ring
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08K 3/06 - Sulfur
• C08G 18/16 - Catalysts
• C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
• C08G 18/24 - Catalysts containing metal compounds of tin
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a highly refractive episulfide-based optical material stabilizer which can resolve striae, color and thermal stability issues that arise in highly refractive episulfide-based optical material, an optical material composition comprising the highly refractive episulfide-based optical material stabilizer, and a method for producing the optical material. The present invention provides an episulfide-based optical material stabilizer comprising the episulfide compound expressed by chemical formula 1. Moreover, provided is an episulfide-based optical material composition comprising the episulfide compound expressed by chemical formula 2, the stabilizer, and the like. By including the stabilizer in the episulfide-based optical material composition, the present invention can resolve, by means of a relatively simple method, the issues of striae, color and thermal stability that occasionally arise in highly refractive episulfide-based optical lenses.

IPC Classes  ?

• C08K 5/45 - Heterocyclic compounds having sulfur in the ring
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02C 7/04 - Contact lenses for the eyes
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08K 3/06 - Sulfur
• C08G 18/16 - Catalysts
• C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
• C08G 18/24 - Catalysts containing metal compounds of tin

Abstract

The present invention relates to a highly refractive episulfide-based optical material stabilizer which can resolve striae, color and thermal stability issues that arise in highly refractive episulfide-based optical material, an optical material composition comprising the highly refractive episulfide-based optical material stabilizer, and a method for producing the optical material. The present invention provides an episulfide-based optical material stabilizer comprising the episulfide compound expressed by chemical formula 1. Moreover, provided is an episulfide-based optical material composition comprising the episulfide compound expressed by chemical formula 2, the stabilizer, and the like. By including the stabilizer in the episulfide-based optical material composition, the present invention can resolve, by means of a relatively simple method, the issues of striae, color and thermal stability that occasionally arise in highly refractive episulfide-based optical lenses.

IPC Classes  ?

• C08K 5/45 - Heterocyclic compounds having sulfur in the ring
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08K 3/06 - Sulfur
• C08G 18/16 - Catalysts
• C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
• C08G 18/24 - Catalysts containing metal compounds of tin
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a stabilizer for episulfide-based optical material having a high refractive index, a composition for optical material using same, and a method for producing optical material, the stabilizer allowing the issues of striae and thermal stability that arise in the episulfide-based optical material having a high refractive index to be resolved. The present invention provides a stabilizer for episulfide-based optical material, the stabilizer comprising the episulfide compound expressed by chemical formula 1. Additionally, provided is a composition for episulfide-based optical material, the composition comprising the episulfide compound expressed by chemical formula 2. The present invention includes the stabilizer in episulfide-based optical material having a high refractive index, and thus, by means of a comparatively simple method, the occasional issues of striae and thermal stability that arise in the episulfide-based optical material having a high refractive index can be resolved.

IPC Classes  ?

• C08K 5/45 - Heterocyclic compounds having sulfur in the ring
• C08G 18/72 - Polyisocyanates or polyisothiocyanates
• C08G 18/16 - Catalysts
• C08G 18/24 - Catalysts containing metal compounds of tin
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a stabilizer for episulfide-based optical material having a high refractive index, a composition for optical material using same, and a method for producing optical material, the stabilizer allowing the issues of striae and thermal stability that arise in the episulfide-based optical material having a high refractive index to be resolved. The present invention provides a stabilizer for episulfide-based optical material, the stabilizer comprising the episulfide compound expressed by chemical formula 1. Additionally, provided is a composition for episulfide-based optical material, the composition comprising episulfide compound expressed by chemical formula 2. The present invention includes the stabilizer in episulfide-based optical material having a high refractive index, and thus, by means of a comparatively simple method, the occasional issues of striae and thermal stability that arise in the episulfide-based optical material having a high refractive index can be resolved.

IPC Classes  ?

• C08K 5/45 - Heterocyclic compounds having sulfur in the ring
• C08G 18/72 - Polyisocyanates or polyisothiocyanates
• C08G 18/16 - Catalysts
• C08G 18/24 - Catalysts containing metal compounds of tin
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a method for manufacturing an optical material by injecting an allyl diglycol carbonate monomer solution into a cavity formed between a pair of outer-sealed molds and, more specifically, to a method for automatic injection of an allyl diglycol carbonate monomer into molds, whereby while an allyl diglycol carbonate monomer solution is injected into the cavity, a predetermined amount of the ally diglycol carbonate monomer solution can be injected in a short time by using a vision recognition system. The present invention provides a method for automatic injection of an allyl diglycol carbonate monomer into molds, the method comprising the steps of: (a) preparing an allyl diglycol carbonate monomer composition having a solid-phase refractive index of 1.495-1.535 and a viscosity of 20-800 cps (25℃); (b) injecting most of the monomer composition into a cavity formed between a pair of outer-sealed molds; and (c) detecting the surface of oil by using a vision recognition system while the monomer composition is injected into the cavity following step (b), and then stopping the injection of the monomer composition when the surface of oil is detected at the set final injection point. According to the present invention, a predetermined amount of the allyl diglycol carbonate monomer solution can be automatically injected into the molds neither excessively nor insufficiently.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• C08G 64/30 - General preparatory processes using carbonates
• G02B 1/00 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements

Abstract

The present invention relates to an automatic washing apparatus and an automatic washing method for automatically and continuously washing lenses and plastic molds for manufacturing optical lenses. The automatic washing method of the present invention comprises: a chemical washing step of placing molds or lenses in holders, and then spraying a chemical thereat at a predetermined pressure or more while rotating same at a high speed; a water washing step of placing, in holders, the molds or the lenses having passed through the chemical washing step, and then spraying water thereat at a predetermined pressure or more while rotating same at a high speed; and a step of placing, in holders, the molds or the lenses having passed through the water washing step, rinsing same with pure water, and then carrying out no-load rotation. According to the present invention, lenses and molds can be effectively washed even while using a minimal amount of water and washing solution.

IPC Classes  ?

• B29C 33/72 - Cleaning
• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• B05B 13/04 - Means for supporting workArrangement or mounting of spray headsAdaptation or arrangement of means for feeding work the spray heads being moved during operation
• G02C 13/00 - AssemblingRepairingCleaning
• B08B 3/08 - Cleaning involving contact with liquid the liquid having chemical or dissolving effect
• B08B 5/02 - Cleaning by the force of jets, e.g. blowing-out cavities

Abstract

The present invention relates to a method for manufacturing an optical material by injecting an aryl-based monomer solution into a cavity formed between a pair of molds having sealed outer edges and, more particularly, to a method for automatically injecting a monomer for an aryl-based optical material into a mold, in which a vision recognition system is used to inject an aryl-based monomer solution into the cavity, so as to enable quantitative injection within a short time. The present invention provides a method for automatically injecting a monomer for an aryl-based optical material into a mold, the method comprising the steps of: (a) preparing a monomer composition for an aryl-based optical material, the composition having a solid state refractive index of 1.537 to 1.585 and a viscosity of 20 to 800 cps at 25°C; (b) injecting most of the monomer composition into a cavity formed between a pair of molds, outer edges of which are sealed; and (c) detecting, following step (b), a fluid surface by using a vision recognition system while injecting the monomer composition into the cavity and terminating the injection of the monomer composition when the fluid surface is detected to have reached a configured final injection point. According to the present invention, the monomer solution for an aryl-based optical material can be automatically injected into a mold in a quantitative amount neither insufficiently nor excessively.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• C08F 218/04 - Vinyl esters
• C08F 222/40 - Imides, e.g. cyclic imides
• C08F 290/06 - Polymers provided for in subclass
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4

Abstract

The present invention relates to a method for preparing an optical material by means of injecting a thiourethane-based monomer solution into a cavity formed between a pair of molds of which the outer edges have been sealed and, more specifically, to an automatic mold injection method, for a monomer for a thiourethane-based optical material, enabling a fixed amount of injection in a short time by means of a vision recognition system during the injection of the thiourethane-based monomer solution into the cavity. The present invention provides an automatic mold injection method for a monomer for a thiourethane-based optical material comprising the steps of: (a) preparing a monomer composition, for a thiourethane-based optical material, having a solid refractive index of 1.523-1.690 and a viscosity of 20-1,000cps (25°C); (b) injecting most of the monomer composition into a cavity formed between a pair of molds of which the outer edges have been sealed; and (c), in succession from step (b), detecting an oil level by means of a vision recognition system during the injection of the monomer composition into the cavity and, if an oil level is detected at a set final point of injection, ending the injection of the monomer composition. According to the present invention, a fixed amount of monomer solution for a thiourethane-based optical material can automatically be injected into a mold neither insufficiently nor excessively.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• B29C 33/62 - Releasing, lubricating or separating agents based on polymers or oligomers
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C08G 18/72 - Polyisocyanates or polyisothiocyanates
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen

Abstract

The present invention relates to a method for manufacturing an optical material by injecting episulfide-based monomer solution into a cavity formed between a pair of molds, the outer peripheries of which are sealed and, more particularly, to a method for automatically injecting an episulfide-based monomer for an optical material into a mold, wherein a vision recognition system is used while injecting episulfide-based monomer solution into the cavity such that a rated amount thereof can be injected within a short period of time. The present invention provides a method for automatically injecting an episulfide-based monomer for an optical material into a mold, the method comprising the steps of: (a) preparing episulfide-based monomer composition for an optical material having a solid-state refractive index of 1.650-1.820 and a viscosity of 15-900cps (25ºC); (b) injecting most of the monomer composition into a cavity formed between a pair of molds, the outer peripheries of which are sealed; and (c) sensing a fluid surface by using a vision recognition system while injecting the monomer composition into the cavity, following step (b), such that, if the fluid surface is sensed at a configured final injection point, injection of the monomer composition is ended. According to the present invention, a rated amount of episulfide-based monomer solution for an optical material can be automatically injected into a mold such that the solution is neither insufficient nor overflows.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• B29C 33/60 - Releasing, lubricating or separating agents
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C08G 59/30 - Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen, and nitrogen
• C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used

Abstract

The present invention relates to a method for preparing an optical material by injecting an acrylic monomer solution into a cavity formed between a pair of externally sealed molds and, more specifically, to a method for automatically injecting, into a mold, an acrylic monomer for an optical material, the method enabling quantitative injection within a short time by means of a vision recognition system while injecting the acrylic monomer solution into the cavity. The present invention provides a method for automatically injecting, into a mold, an acrylic monomer for an optical material, comprising the steps of: (a) preparing an acrylic monomer composition for an optical material, having a solid phase refractive index of 1.50-1.63 and a viscosity of 20-1,000 cps (25°C); (b) injecting most of the monomer composition into a cavity formed between a pair of externally sealed molds; and (c) detecting the surface of oil by means of a vision recognition system while injecting the monomer composition into the cavity continuously from step (b), so as to terminate the injection of the monomer composition when the surface of the oil is detected at a set final injection point. According to the present invention, the acrylic monomer solution for an optical material can be automatically and quantitatively injected in a proper amount into a mold.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• B29C 33/00 - Moulds or coresDetails thereof or accessories therefor
• C08F 220/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• G01N 33/44 - ResinsPlasticsRubberLeather

Abstract

The present invention relates to an epoxy acrylic optical lens and, specifically, to: a resin composition for a high quality epoxy acrylic medium-refractive-index optical lens having a solid phase refractive index of 1.53-1.58, the composition having excellent thermal stability, light resistance, transparency, color, demoldability and compressive strength; and a preparation method therefor. The present invention provides a resin composition for an epoxy acrylic medium-refractive-index optical lens having a solid phase refractive index of 1.53-1.58, the composition comprising: 50-70 wt% of a bisphenol A epoxy acrylate having a hydrolyzable chlorine amount of 0.01-0.11 wt%; 21-45 wt% of methyl methacrylate; and 1-17 wt% of a reactive diluents. According to the present invention, the resin composition for an epoxy acrylic medium-refractive-index optical lens, having good thermal stability, light resistance, transparency, color and demoldability while improving compressive strength in a medium-refractive-index lens having a refractive index of 1.53-1.58 can be obtained by controlling the hydrolyzable chlorine amount of bisphenol A diglycidyl ether to be 0.11 wt% or less and adding a large quantity of MMA to the composition. The epoxy acrylic medium-refractive-index optical lens, according to the present invention, can be widely used in various fields by replacing conventional medium-refractive-index optical lenses.

IPC Classes  ?

• C08F 220/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08F 220/18 - Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
• C08K 5/00 - Use of organic ingredients
• C08K 5/5313 - Phosphinic compounds, e.g. R2=P(:O)OR'
• C08K 5/5333 - Esters of phosphonic acids
• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• B29L 11/00 - Optical elements, e.g. lenses, prisms

Abstract

The present invention relates to an epoxy acryl-based optical lens and, especially, to a resin composition for an epoxy acryl-based medium-refractive optical lens having favorable moldability, thermal stability, light resistance, and compressive strength, with a solid-state refractive index of 1.53-1.58, and to a preparation method therefor. Provided in the present invention is a resin composition for an epoxy acryl-based medium-refractive optical lens having a solid-state refractive index of 1.53-1.58, the resin composition containing: 50-70 wt% of bisphenol A epoxyacrylate having an epoxy group-containing compound content of 0.7 wt% or less, 21-45 wt% of methyl methacrylate, and 1-17 wt% of a reactive diluent. According to the present invention, an epoxy acryl-based medium-refractive optical lens having excellent moldability, thermal stability, and light resistance as well as high compressive strength, while maintaining transparency and Abbe's number in good condition can be produced at a low production cost, by controlling the content of the epoxy group-containing compound remaining in the preparation procedure of epoxy acrylate and allowing a large amount of MMA to be contained in the composition. The epoxy acryl-based medium-refractive optical lens according to the present invention can be widely used in various fields by substituting for an existing medium-refractive optical lens.

IPC Classes  ?

• C08L 33/06 - Homopolymers or copolymers of esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C08K 5/5313 - Phosphinic compounds, e.g. R2=P(:O)OR'
• C08K 5/5333 - Esters of phosphonic acids
• B29D 11/00 - Producing optical elements, e.g. lenses or prisms

Abstract

The present invention relates to an epoxy acrylic optical lens and, especially, to a resin composition for an epoxy acrylic middle-refractive optical lens having favorable moldability, thermal stability, light resistance, and compressive strength, together with a solid-state refractive index of 1.53-1.58, and to a preparation method for the resin composition. Provided in the present invention is a resin composition for an epoxy acrylic middle-refractive optical lens having a solid-state refractive index of 1.53-1.58, the resin composition containing: 50-70 wt% of bisphenol A epoxyacrylate having an acid value of 0.01-2.5; 21-45 wt% of methyl methacrylate; and 1-17 wt% of a reactive diluent. According to the present invention, an epoxy acrylic middle-refractive optical lens having excellent moldability, thermal stability, and light resistance as well as high compressive strength, while maintaining transparency and Abbe's number in good condition can be produced at a low production cost, by controlling the acid value of epoxy acrylate and allowing a large amount of MMA to be contained in the composition. The epoxy acrylic middle-refractive optical lens according to the present invention can be widely used in various fields by substituting for an existing middle-refractive optical lens.

IPC Classes  ?

• C08F 220/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08F 220/18 - Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
• B29D 11/00 - Producing optical elements, e.g. lenses or prisms
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses
• G02C 7/02 - LensesLens systems

Abstract

In the present invention, a tape is wrapped around the outer circumference of an injected mold, and a monomer solution is injected in a cavity formed therebetween, wherein the injection amount of the monomer solution can be minutely controlled by using a visual recognition system: the oil level change of the monomer solution injected into the cavity is filmed using the visual recognition system, the filmed oil level change is compared with an oil level change shape of a monomer solution stored in advance for each step, and if the oil level change shape of the monomer solution injected coincides with the oil level change shape of the monomer stored in advance, a controller can inject the monomer solution into the cavity while adjusting the injection amount of an injector in each step.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms

Abstract

The present invention relates to an epoxy acryl-based optical lens and, particularly, to a resin composition for an epoxy acryl-based medium-refractive optical lens having a solid-phase refractive index of 1.53-1.58 and favorable transparency, Abbe's number, thermal stability, light resistance, and compressive strength, and to a preparation method therefor. The present invention provides a resin composition for an epoxy acryl-based medium-refractive optical lens having a solid-phase refractive index of 1.53-1.58, the resin composition containing: 50-70 wt% of bisphenol A epoxy acrylate, which is obtained by reaction of bisphenol A diglycidyl ether having a chlorine content of 100-1,700 ppm and an acrylic acid; 21-45 wt% of methyl methacrylate; and 1-17 wt% of a reactive diluent. According to the present invention, a resin composition for an epoxy acryl-based medium-refractive optical lens having improved compressive strength and favorable transparency, Abbe's number, thermal stability, and light resistance in a medium-refractive lens having a refractive index of 1.53-1.58 can be obtained by controlling the chlorine content in bisphenol A diglycidyl ether and containing a large amount of MMA in the composition. The epoxy acryl-based medium-refractive optical lens according to the present invention substitutes for an existing medium-refractive optical lens, and thus can be widely used in various fields.

IPC Classes  ?

• C08F 220/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08K 5/53 - Phosphorus bound to oxygen bound to oxygen and to carbon only
• G02B 3/00 - Simple or compound lenses
• B29D 11/00 - Producing optical elements, e.g. lenses or prisms

Abstract

A method for producing 3-mercaptopropionic acid and methods using same for producing a carbonic acid ester compound having a mercapto group and a thiourethane-based optical material. The present invention improves a process during the production of 3-mercaptopropionic acid, significantly increases yield, and reduces the temperature and time during vacuum distillation, thereby preventing the destruction of a product and significantly increasing productivity. The present invention allows high-purity 3-mercaptopropionic acid having an excellent color to be finally yielded; accordingly, by using same, a high-purity carbonic acid ester compound having an excellent color and a mercapto group can be inexpensively obtained. A thiourethane-based polymeric composition and a thiourethane-based optical material obtained by polymerizing same can likewise be inexpensively obtained by using said carbonic acid ester compound. Such carbonic acid ester compound can be used for the production of inexpensive thiourethane optical lenses; consequently, inexpensive optical lenses having an excellent color can be obtained.

IPC Classes  ?

• C08G 18/00 - Polymeric products of isocyanates or isothiocyanates
• C08G 61/04 - Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes only aliphatic carbon atoms
• C07C 319/12 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols by reactions not involving the formation of mercapto groups
• C07C 319/04 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols by addition of hydrogen sulfide or its salts to unsaturated compounds
• C07C 319/26 - SeparationPurificationStabilisationUse of additives
• C08L 81/00 - Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon onlyCompositions of polysulfonesCompositions of derivatives of such polymers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/72 - Polyisocyanates or polyisothiocyanates
• C08G 18/73 - Polyisocyanates or polyisothiocyanates acyclic
• C08G 18/75 - Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic

Abstract

The present invention relates to a method for producing 3-mercaptopropionic acid and methods using same for producing a carbonic acid ester compound having a mercapto group and a thiourethane-based optical material. The present invention improves a process during the production of 3-mercaptopropionic acid, thus significantly increases yield, and, at the same time, reduces the temperature and time during vacuum distillation, thereby preventing the destruction of a product and significantly increasing productivity. The present invention has an overall easily implementable, convenient, and simple process, can significantly increase yield and productivity, and allows high-purity 3-mercaptopropionic acid having an excellent color to be finally yielded; accordingly, by using same, a high-purity carbonic acid ester compound having an excellent color and a mercapto group can be inexpensively obtained. Further, a thiourethane-based polymeric composition and a thiourethane-based optical material obtained by polymerizing same can likewise be inexpensively obtained by using said carbonic acid ester compound. The carbonic acid ester compound obtained according to the present invention can be used particularly for the production of inexpensive thiourethane optical lenses; consequently, inexpensive optical lenses having an excellent color can be obtained.

IPC Classes  ?

• C07C 319/26 - SeparationPurificationStabilisationUse of additives
• C07C 319/04 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols by addition of hydrogen sulfide or its salts to unsaturated compounds
• C07C 321/14 - Sulfides, hydropolysulfides, or polysulfides having thio groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• C08L 81/00 - Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon onlyCompositions of polysulfonesCompositions of derivatives of such polymers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a thioepoxy-based ultra-high-refraction optical resin. And more particularly relates to: a thioepoxy-based optical resin composition which has good light resistance and initial colour and hard adhesive strength and allows an increased thiourethane content; and a production method for a thioepoxy-based optical material. The present invention concerns an optical resin composition comprising a thioepoxy compound in the form of bis(2,3-epithiopropyl)sulphide and comprising a thiourethane component in the form of xylylene diisocyanate (XDI) and 2,3-bis(2-mercaptoethylthio) propane-1-thiol (GST), the composition incorporating (2,3-epithiopropyl) (2,3-epoxypropyl)sulphide in an amount of between 2.46 and 12.75 wt.% with respect to the composition as a whole, thereby increasing the content of the thiourethane component to at least 15 wt.% and consequently providing a thioepoxy-based optical material which has outstanding tensile strength, compression strength, colourability, initial colour, hard adhesive strength and the like.

IPC Classes  ?

• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/58 - Epoxy resins
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a method for producing a thioepoxy-based optical material, and a polymeric composition for a thioepoxy-based optical material and, in particular, to a production method which can obtain a thioepoxy-based optical material having good color, being capable of inhibiting polymerization imbalance and having good thermal resistance, and to a polymeric composition therefor. The present invention provides a method for producing a thioepoxy-based optical material, comprising a step of obtaining a bis(2-mercaptoethyl) sulfide compound in the form of a synthetic product comprising less than 3% by weight of at least one of 2-2-[2-(2-mercaptoethylthio)ethoxy] ethanol and 1,2,5-trithiepane. Also, the present invention provides a polymeric composition for a thioepoxy-based optical material, comprising the bis (2-mercaptoethyl) sulfide compound in the form of a synthetic product and a thioepoxy compound. According to the present invention, it is possible to obtain a high-quality of thioepoxy-based optical material which has good thermal resistance and of which coloration and polymerization imbalance are suppressed by a simple and easy method.

IPC Classes  ?

• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08L 63/00 - Compositions of epoxy resinsCompositions of derivatives of epoxy resins

Abstract

The present invention relates to a reinforced plastic sheet that can replace a reinforced glass substrate. The present invention provides a reinforced plastic sheet and a method for manufacturing the same, the reinforced plastic sheet being obtained by impregnating a glass fiber with a thiourethane liquid-state resin, which includes a mixture of a polyisocyanate compound and a polythiol compound, and which has a solid-state refractive index of 1.50-1.61, and then curing the same. The reinforced plastic sheet according to the present invention can be used, in place of conventional reinforced glass substrates, as a display or touch screen-type cover window in various fields, such as portable telephones, tablet PCs, laptops, LCD monitors, cameras, etc. In addition, the reinforced plastic sheet according to the present invention can be widely used in fields that require both transparency and strength, including various kinds of electronic products, such as refrigerators, washing machines, TV sets, etc., product cases that require transparency, and various see-through windows attached to helmets or shields.

IPC Classes  ?

• C08J 5/04 - Reinforcing macromolecular compounds with loose or coherent fibrous material
• C08J 5/24 - Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/72 - Polyisocyanates or polyisothiocyanates
• C08K 7/14 - Glass
• C08L 75/04 - Polyurethanes
• C08J 5/18 - Manufacture of films or sheets

Abstract

The present invention relates to a new method for forming a functional coating layer on an optical lens, and an optical lens with a functional coating layer formed thereon which is manufactured according to the method. Provided is a method for forming a functional coating layer on an optical lens, comprising: a step for forming a functional coating layer by printing a functional coating material on a base film or coating the base film with the functional coating material; a step for drying or curing the functional coating layer; and a step for transferring the dried or cured functional coating layer from the base film to an optical lens. The present invention can provide functions such as a photochromism and self-healing through application of only a simple additional process to a completed lens. The method of the present invention has high productivity, is capable of mass production, and is also capable of significantly reducing production costs compared to conventional methods.

IPC Classes  ?

• G02B 1/11 - Anti-reflection coatings

Abstract

The present invention relates to a novel thiol compound and a polymerizable composition containing the same. The present invention provides a thiol compound and a polymerizable composition containing the same. The thiol compound and the polymerizable composition containing the same, of the present invention, are suitable for the production of urethane-based plastic materials satisfying both product quality and economic feasibility, and are suitable for the production of, especially, urethane-based plastic materials required to have colorless transparency and high or middle refractive property.

IPC Classes  ?

• C07C 321/04 - Thiols having mercapto groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• C07C 319/08 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols by replacement of hydroxy groups or etherified or esterified hydroxy groups
• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a novel polymerizable composition for a high-refractive optical material, and a method for preparing a high-refractive optical material. The present invention provides a polymerizable composition for a high-refractive optical material, the composition containing a compound represented by chemical formula 1 or 2 and a compound represented by chemical formula 3, and a high-refractive optical material obtained by polymerizing the composition, especially, a glass lens. Furthermore, the present invention provides a composition for a photochromic high-refractive optical material and a photochromic high-refractive optical material obtained by polymerizing the composition, especially, a photochromic glass lens.

IPC Classes  ?

• C08F 20/10 - Esters
• C08L 33/04 - Homopolymers or copolymers of esters
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a polymerizable composition for a highly refractive optical material, a photochromic composition thereof, and a method for preparing a highly refractive optical material using the compositions. In the present invention, provided is a polymerizable composition for a highly refractive optical material, the polymerizable composition containing at least one of compounds represented by chemical formulas 1 and 2, and provided is a photochromic composition further containing a photochromic compound in addition to the polymerizable composition. According to the present invention, a fluorene acryl based optical material can be obtained that has excellent photochromic performance and optical characteristics while being highly refractive.

IPC Classes  ?

• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C07C 69/612 - Esters of carboxylic acids having a carboxyl group bound to an acyclic carbon atom and having a six-membered aromatic ring in the acid moiety

Abstract

The present invention relates to a highly refractive epoxy-acrylic optical material, and particularly to a polymeric composition therefor and a method for manufacturing the optical material, the polymeric composition having superb demolding property, transparency, thermal stability and light-fastness. Provided is a polymeric composition, for epoxy-acrylic optical material, comprising an epoxy acrylate compound. Epoxy-acrylic optical material manufactured in accordance with the present invention can replace existing optical materials, such as thiourethane-based optical material, and be widely used in a variety of fields.

IPC Classes  ?

• C08L 33/04 - Homopolymers or copolymers of esters
• C08F 20/10 - Esters
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 5/02 - Diffusing elementsAfocal elements

Abstract

The present invention relates to a method for storing a thioepoxy compound and a method for preparing a thioepoxy-based optical material using the thioepoxy compound, and particularly, to a preparation of a colorless and transparent high-quality thioepoxy-based optical material which has excellent color and thermal stability and deteriorates a small amount by preventing deterioration during storage of a thioepoxy compound. The present invention provides: a method for storing a thioepoxy compound for an optical material, comprising storing a thioepoxy compound with a water content of 500-2,500 ppm at -78 to 10 ℃; and a method for preparing a thioepoxy-based optical material, comprising polymerizing a polymerizable composition containing the thioepoxy compound stored using the storage method. The colorless and transparent high-quality thioepoxy-based optical material prepared by the present invention can be widely used in various fields by replacing a conventional optical material.

IPC Classes  ?

• C07D 331/02 - Three-membered rings
• C08L 81/02 - PolythioethersPolythioether-ethers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a polymerization composition for an epoxy acrylic optical material and a method for manufacturing an epoxy acrylic optical material, and more specifically, to a polymerization composition for an epoxy acrylic optical material having enhanced storage stability that can prevent discoloration when stored at room temperature for a long time, and to a method for manufacturing an optical material. The present invention provides the polymerization composition for the epoxy acrylic optical material, comprising an epoxy acrylate-based compound, diphenyl dodecyl phosphate, and a phosphoric acid ester compound. According to the present invention, a high-quality epoxy acrylic optical material having the advantages of a high refractive rate, an excellent Abbe value, and superior optical properties including transparency, lightness, and heat resistance, and which is not subject to discoloration even when storing or using at room temperature for a long time, can be easily obtained. The epoxy acrylic optical material according to the present invention can replace existing optical materials and be widely used in a variety of industries.

IPC Classes  ?

• C08F 20/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08L 33/04 - Homopolymers or copolymers of esters
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a polymerization composition for an epoxy acrylic optical material and a method for manufacturing an epoxy acrylic optical material, and more specifically to a polymerization composition for an epoxy acrylic optical material having high yield without developing striae or white turbidity by maintaining an appropriate polymerization speed, and is colorless, transparent, and changeless. Provided is the polymerization composition for the epoxy acrylic optical material, comprising an epoxy acrylate compound, which comprises 0.1-2 wt. % of alpha methylstyrene dimer with respect to the total polymerization composition. In the present invention the high-quality epoxy acrylic optical material that does not develop striae or white turbidity can be easily manufactured by stably maintaining the appropriate polymerization speed.

IPC Classes  ?

• C08F 20/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08F 12/08 - Styrene
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a method for manufacturing a thioepoxy-based optical material, and more specifically to a method for manufacturing a high-quality optical material having high yield without developing striae or white turbidity due to imbalanced polymerization, and is colorless, transparent, and changeless. Provided is a method for manufacturing the thio epoxy-based optical material in which a polymerization composition, comprising a compound having at least one thioepoxy group, is in-mold polymerized, and is characterized in that mixing, defoaming, and injection into a mold are performed within the -5~20℃ temperature range. The thioepoxy-based optical material manufactured according to the present invention can replace existing optical materials and be widely used in a variety of industries.

IPC Classes  ?

• C08G 18/52 - Polythioethers
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a method for manufacturing a thioepoxy-based optical material, and specifically to a method for manufacturing a high-quality optical material having high yield without developing striae, white turbidity, or fine bubbles, and is colorless, transparent, and changeless. Provided is a method for manufacturing the theioepoxy-based optical material in which a polymerization composition, comprising a compound having at least one thioepoxy group or thiethane group, is in-mold polymerized, and is characterized in that the polymerization composition is processed under a specific vacuum condition before being injected into a mold for in-mold polymerization so as to suppress development of striae, white turbidity, or fine bubbles. The thioepoxy-based optical material manufactured according to the present invention can replace existing optical materials and be widely used in a variety of industries.

IPC Classes  ?

• C08G 18/52 - Polythioethers
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a polymerization composition for an epoxy acrylic optical material and a method for manufacturing an epoxy acrylic optical material, and more specifically, to a polymerization composition for an epoxy acrylic optical material, which can be easily manufactured into an optical material by maintaining appropriate handling properties and polymerization speed and which does not develop striae or white turbidity, and to a method for manufacturing an optical material. The polymerization composition for the epoxy acrylic optical material comprising an epoxy acrylate compound as a monomer ingredient, uses as a reactive diluting agent a dibenzyl malate product of which the content of monobenzylmalate is 10-25 wt. %, and comprises 0.1-2 wt.% of alpha methylstyrene dimer with respect to the total polymerization composition. The epoxy acrylic optical material manufactured according to the present invention replaces existing optical material, such as thiourethane optical material and be widely used in a variety of industries.

IPC Classes  ?

• C08F 20/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08F 12/08 - Styrene
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a method for manufacturing an epoxy acrylic optical material, and more specifically to a method for manufacturing a high-quality optical material having high yield without developing striae, a ring, variable curing, white turbidity, or developing fine bubbles due to imbalanced polymerization, and is colorless, transparent, and changeless. Provided is a method for manufacturing the epoxy acrylic optical material in which a polymerization composition, comprising an epoxy acrylate compound and a reactive dilution agent, is in-mold polymerized, and is characterized in that mixing, defoaming, and injection into a mold are performed within the 5-40℃ temperature range, wherein the polymerization composition is processed in a specific vacuum condition before the in-mold polymerization. The epoxy acrylic optical material according to the present invention can replace existing optical material and be widely used in a variety of industries.

IPC Classes  ?

• C08F 20/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08L 33/04 - Homopolymers or copolymers of esters
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a method for manufacturing a thiourethane-based optical material, and specifically to a method for manufacturing a high-quality optical material having high yield without developing striae, white turbidity, and fine bubbles, and is colorless, transparent, and changeless. Provided is a method for manufacturing the thiourethane-based optical material in which a polymerization composition, comprising a polythiol compound and a polyisocyanate compound, is in-mold polymerized, and is characterized in that polymerization composition is processed under a specific vacuum condition before being injected into a mold for in-mold polymerization. The thiourethane-based optical material manufactured according to the present invention can replace existing optical materials and be widely used in a variety of industries.

IPC Classes  ?

• C08G 18/70 - Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a polymerizable composition for an epoxy acrylic optical material, and a method for preparing an epoxy acrylic optical material, and particularly, to: a polymerizable composition for an epoxy acrylic optical material which maintains suitable viscosity and reaction velocity, and thereby facilitates preparation of an optical material; and a method for preparing an optical material. The present invention provides a polymerizable composition for an epoxy acrylic optical material, comprising an epoxy acrylate-based compound and a dibenzyl malate product containing 10-25 wt% of monobenzyl malate. The present invention can provide a polymerizable composition for an epoxy acrylic optical material which uses a dibenzyl malate product containing 10-25 wt% of monobenzyl malate together with a monomer component, thereby having a suitable handling property and reactivity to facilitate the preparation of an optical material. It is possible to prepare, in a high yield, a high quality epoxy acrylic optical material having a high refractive index, a high Abbe's number and remarkable optical properties such as transparency, lightweightness, heat resistance and the like by template polymerizing the polymerizable composition of the present invention.

IPC Classes  ?

• C08L 33/04 - Homopolymers or copolymers of esters
• C08L 35/00 - Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereofCompositions of derivatives of such polymers
• C08F 20/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a method for polymerizing a resin casting for use as an epoxy acrylic optical lens which facilitates the separation of same from a mold, and to a resin composition containing an internal releasing agent for use in epoxy acrylic optical lenses. According to the present invention, a compound having a polar group or a phosphate ester compound is added as an internal releasing agent to the resin composition used for epoxy acrylate lenses for eyeglasses so that the resin for the optical lens can be manufactured to have little polymerization imbalance and excellent release performance.

IPC Classes  ?

• C08F 20/26 - Esters containing oxygen in addition to the carboxy oxygen
• C08F 20/32 - Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
• C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• C08L 33/04 - Homopolymers or copolymers of esters
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a novel method for preparing a polythiol compound which is used for an optical material, and to a polymeric composition comprising the polythiol compound, and more particularly, to a composition and method for obtaining a high-quality polythiol compound having homogeneous color and high purity at a low cost and also obtaining, through the use of a polymeric composition including the polythiol composition, an optical lens having outstanding optical properties, which is clean and transparent and has high heat-resistance.

IPC Classes  ?

• C07C 319/22 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of hydropolysulfides or polysulfides
• C07C 319/06 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols from sulfides, hydropolysulfides or polysulfides
• C07C 321/14 - Sulfides, hydropolysulfides, or polysulfides having thio groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a method for producing a polythiol compound used in thioepoxy-based optical materials and to a copolymer composition, comprising the polythiol compound, for thioepoxy-based optical materials, and particularly to a high-quality polythiol compound, for optical materials, exhibiting desirable characteristics from a coloring perspective, and a copolymer composition comprising same. Provided in the present invention is a method for producing a polythiol compound having reduced coloration by means of controlling the calcium content in thiourea used in the synthesis of polythiol composition for thioepoxy-based optical materials, and particularly a method for producing bis(2-hydroxyethyl)sulfide compound used in the copolymerization of thioepoxy-based optical materials, and a copolymer composition comprising polythiol compound obtained by the method. The thioepoxy-based optical lens having good coloring, obtained by means of the present invention, can replace existing lenses and be widely used in diverse fields, particularly as lenses for glasses, polarized lights and cameras.

IPC Classes  ?

• C07C 319/02 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols
• C07C 321/14 - Sulfides, hydropolysulfides, or polysulfides having thio groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a polythiol compound for optical materials exhibiting desirable characteristics from a coloring perspective, a composition comprising same for optical materials, and a method for producing optical materials. The present invention provides a method for producing a polythiol compound for optical materials which reacts epichlorohydrin compound having total impurities content of less than 0.5 wt% and 2-Mercaptoethanol. The present invention allows obtaining a polythiol compound exhibiting suppressed coloration, and by using same, allows obtaining a urethane group exhibiting suppressed coloration, low yellowness and good coloring. The polythiol compound according to the present invention can be used in the production of a variety of optical materials such as a urethane group, and optical lenses having good coloring, obtained by means of the present invention, can replace existing lenses and be widely used in diverse fields, particularly as lenses for glasses, polarized lights and cameras.

IPC Classes  ?

• C07C 319/02 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols
• C07C 321/04 - Thiols having mercapto groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• G02B 3/00 - Simple or compound lenses
• C08G 18/52 - Polythioethers

Abstract

The present invention relates to a method for producing 3-mercaptopropionic acid and carbonic acid ester composition having mercapto group using same, and a method for producing thiourethane-based optical materials. The method for producing 3-mercaptopropionic acid according to the present invention does not include a post-processing treatment, which is necessitated by generation of a dimer such as thiodipropionitrile, thereby the process is simple and economical, and exhibits superior yield rate. Additionally, the carbonic acid ester composition produced with 3-mercaptopropionic acid produced using the method exhibit superior purity and coloring, and allows production at a low cost, and thus has the benefit of being usable as an inexpensive resin composition for urethane-based optical materials, and ptical materials thus produced exhibit excellent coloring. Thiourethane-based optical lenses having good coloring, obtained by means of the present invention, can replace existing lenses and be widely used in diverse fields.

IPC Classes  ?

• C07C 319/04 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols by addition of hydrogen sulfide or its salts to unsaturated compounds
• C07C 323/03 - Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and halogen atoms, or nitro or nitroso groups bound to the same carbon skeleton having sulfur atoms of thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
• C08L 81/00 - Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon onlyCompositions of polysulfonesCompositions of derivatives of such polymers

Abstract

The present invention relates to a method for preparing a thioepoxy-based optical material, to a polymerizable composition thereof and to a thioepoxy compound for the composition. The present invention provides a thioepoxy compound for an optical material, containing 4 to 15 % by weight of a 2,3-epoxypropyl(2,3-epithiopropyl) sulfide compound and/or a 2,3-epoxypropyl(2,3-epithiopropyl) disulfide compound. The present invention also provides a polymerizable composition comprising the thioepoxy compound and a method for preparing an optical material for polymerizing the composition. The present invention solves the problems of color instability, deformation and polymerization imbalance in a thioepoxy-based optical material.

IPC Classes  ?

• C07D 409/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
• C08G 18/52 - Polythioethers
• C08G 18/58 - Epoxy resins
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a copolymer composition comprising a thioepoxy compound, a polyisocyanate compound and a polythiol compound and to a thioepoxy-based optical material for polymerizing the composition. More particularly, the present invention relates to a method for preparing a high quality optical material which may not cause a striae or turbidity and which is colorless and transparent and which may not cause a deformation. The present invention provides a thioepoxy-based copolymer composition comprising a thioepoxy compound, a polyisocyanate compound and a polythiol compound, the water content of the thioepoxy compound being 10 to 700ppm, the water content of the composition being 10 to 800 ppm. The present invention also provides a method for preparing a thioepoxy-based optical material for polymerizing the composition.

IPC Classes  ?

• C08G 18/09 - Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
• C08G 18/52 - Polythioethers
• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 5/04 - Prisms

Abstract

The present invention relates to a copolymer composition for a highly refractive optical lens, said composition comprising a thioepoxy compound, a polyisocyanate compound, and a polythiol compound, and more particularly, to a copolymer composition and a method for manufacturing an optical lens which does not have a surface ring defect even in a high power lens, the mold for which has a large radius of curvature. In the present invention provides the copolymer composition comprising the thioepoxy compound, the polyisocyanate compound, and a bis(2-mercaptoethyl) sulfide, the optical lens in which the composition is polymerized, and the method for manufacturing the optical lens. The copolymer composition and the optical lens in which the composition is polymerized, according to the present invention, exhibit very few surface ring defects on the surface of the lens even in a high-power lens (having an optical power of approximately at least -6.00), exhibits superior surface precision, and can be manufactured at a high yield. According to the present invention, ring defects on the surfaces of lenses are rare even in a highly refractive high-power lens, and a thioepoxy-based optical material, which has superior surface precision, can be used to manufacture lenses at a high yield. The optical lens manufactured according to the present invention can replace existing optical lenses and can be utilized in various areas, including lenses for glasses, polarized lenses, and camera lenses.

IPC Classes  ?

• C08G 75/00 - Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon
• C08K 5/521 - Esters of phosphoric acids, e.g. of H3PO4
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a polymeric composition for a thioepoxy-based optical material and a method of manufacturing a thioepoxy-based optical material, and more particularly, to providing a clear, transparent, and high quality thioepoxy-based optical material that resolves a color instability problem exhibited in thioepoxy-based optical materials. The present invention provides a thioepoxy-based polymeric composition comprising a thioepoxy compound having 1% or less by weight of epichlorohydrin. In the present invention, the color instability problem exhibited in thioepoxy-based optical materials can be resolved in an easy way by controlling the content of epichlorohydrin in a starting material, which synthesizes a thioepoxy compound, or the content of epichlorohydrin in a thioepoxy compound. According to the present invention, a clear, transparent, and high quality thioepoxy-based optical material can be easily manufactured at a high yield. The thioepoxy optical material thus manufactured according to the present invention can be widely used instead of a common optical material.

IPC Classes  ?

• C08G 18/52 - Polythioethers
• C08K 5/405 - ThioureasDerivatives thereof
• C08L 75/00 - Compositions of polyureas or polyurethanesCompositions of derivatives of such polymers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a polymerizable composition for an optical material, and a preparation method of an optical material for obtaining a high quality thioepoxy-based optical material without uncuring or polymer imbalance. The present invention provides a preparation method of a thioepoxy-based optical material comprising the steps of: preparing a polymerizable composition containing a thioepoxy compound with a pH of 4-8; and template polymerizing the polymerizable composition. The thioepoxy-based optical material prepared according to the present invention can be widely used in various fields by replacing conventional optical materials.

IPC Classes  ?

• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a template polymerization method of a thioepoxy-based optical material, and a polymerizable composition thereof, and more specifically, to a template polymerization method of a thioepoxy-based optical material having good demolding properties from a mold and surface precision, and a polymerizable composition thereof. The present invention provides a template polymerization method of a thioepoxy-based optical material by putting a polymerizable composition containing a thioepoxy compound into a mold, and polymerizing the same, wherein the water content of the polymerizable composition is 100-2,500 ppm, and an internal release agent is added to the polymerizable composition before polymerization. A thioepoxy-based optical material with excellent surface precision prepared by the present invention can be widely used in various fields by replacing conventional optical materials.

IPC Classes  ?

• C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
• C08G 18/52 - Polythioethers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02C 7/02 - LensesLens systems

Abstract

The present invention relates to a method for manufacturing a polythiol compound, and a polymerization composite for optical material comprising same, and particularly to a method for manufacturing a polythiol compound by reacting a triple-bond compound and a mercapto group having a thiol functional group and preparing through a polyol compound, and to a polymerization composite for optical material comprising the polythiol compound. Provided is a manufacturing method for the polythiol compound for optical material comprising the steps of: producing a polyol compound by reacting a triple-bond compound and a mercapto compound having at least one thiol functional group; producing isothiuronium salt by reacting the polyol compound and thiourea; and producing the polythiol compound by hydrolyzing the isothiuronium salt. The polythiol compound manufactured in accordance to the present invention can produce colorless and transparent high-quality lens which are without imbalanced polymerization, whitening or white turbidity, even when the lens are manufactured by polymerization with widely used polyiso(thio)cyanate.

IPC Classes  ?

• C07C 319/02 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of thiols
• C08G 18/52 - Polythioethers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C07C 319/18 - Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by addition of thiols to unsaturated compounds

Abstract

The present invention relates to a method for manufacturing thiourethane-based optical material, and particularly to a method for manufacturing high-quality optical material having high yield without developing striae or white turbidity due to imbalanced polymerization, and is colorless, transparent and changeless. Provided is a method for manufacturing thiourethane-based optical material in which a polymerization composite, comprising a polythiol compound and a polyiso(thio)cyanate compound, is in-mold polymerized, and is characterized in that mixing, defoaming and injection into a mold are performed within the 21- 40℃ temperature range. The thiourethane-based optical material manufactured according to the present invention can replace existing optical material and be widely used in a variety of industries.

IPC Classes  ?

• C08G 75/04 - Polythioethers from mercapto compounds or metallic derivatives thereof
• C08G 18/02 - Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only
• C08L 81/00 - Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen, or carbon onlyCompositions of polysulfonesCompositions of derivatives of such polymers
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a method for manufacturing a high-quality thiorethane-based optical material by using a universal polyisocynate compound, a resin composition therefor, and an optical material manufactured thereby. The present invention provides the thiourethane-based optical material, which is not subject to whitening of the edge of the lens or polymer imbalance, by controlling a polythiol compound obtained from the manufacturing process to be pH 3.1-7, in order to resolve the existing problem of whitening, which occurs by an adhesive agent melting from an adhesive tape when casting the lens.

IPC Classes  ?

• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• C08K 5/37 - Thiols
• C08G 18/06 - Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
• C07C 321/02 - Thiols having mercapto groups bound to acyclic carbon atoms

Abstract

The present invention relates to a novel polythiol compound having utility for optical lens material, a preparation method therefor, and a resin composition for an optical material using the novel polythiol. A resin composition for an optical material having the novel polythiol compound of the present invention has excellent heat resistance and reactivity while having high refractive index, and can thus be used for various optical products including lenses such as eyeglass lens and camera lens, prism, optical pipe, recording medium system such as optical disk and magnetic disk, colored filter, and infrared absorber filter.

IPC Classes  ?

• C07C 321/04 - Thiols having mercapto groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a polythiol compound, a method for preparing the polythiol compound, and a resin composition for a urethane optical material using the polythiol compound, and in particular, to a polythiol compound having extended a chain thereof through ring-opening by adding a compound having terminal thiol group to a cyclic episulfide or thietane compound, a method for preparing the polythiol compound, and a resin compound for an optical material using the polythiol compound. The optical material obtained using the polythiol compound (chemical formula 1) developed in the present invention enhances refractive index, has excellent heat resistance and reactivity, and can thus be used for optics related products including lens such as glasses lens and camera lens, prism, optical pipe, optical disk, magnetic disk, recording medium system, colored filter, infrared absorber filter, and other plastic processed products.

IPC Classes  ?

• C07C 321/04 - Thiols having mercapto groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a method for manufacturing an optical material by polymerizing a resin composition comprising a compound containing thiol and a composition having an isocyanate group, and more particularly, to a method for manufacturing a high-quality urethane-based optical material by using a universal polyisocyanate compound. The present invention provides the method for manufacturing the resin for the urethane-based optical material, which in-mold polymerizes a polythiol compound and a universal polyisocyanate compound as main ingredients and the resin composition having 300 to 3,000ppm of water, and provides the optical material manufactured thereby. According to the present invention, by using the universal isocyanate compound, which is supplied at a low price, tape whitening or the formation of bubbles can be minimized while performing the in-mold polymerization using tape, and a high-quality and transparent urethane-based optical material without any color can be manufactured at a high yield.

IPC Classes  ?

• C08G 18/70 - Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
• C08G 18/52 - Polythioethers
• C08L 75/04 - Polyurethanes
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
• G02B 3/00 - Simple or compound lenses

Abstract

The present invention relates to a novel method for preparing an allyl carbonate compound and to a resin composition for optics using same, and more particularly, for providing a preparation method for acquiring an allyl carbonate compound by preliminarily ester exchange-reacting the allyl carbonate with unsaturated alcohol with the presence of a catalyst to achieve a diallyl carbonate compound, adding a polyhydric alcohol to same, and enriching same by distilling under reduced pressure, and for providing a resin composition for optics using same, which has a higher Abbe value and superior APHA, by means of the acquired allyl carbonate alone, or by mixing unsaturated carboxylate or a vinyl monomer, .

IPC Classes  ?

• C07C 68/06 - Preparation of esters of carbonic or haloformic acids from organic carbonates
• C07C 68/00 - Preparation of esters of carbonic or haloformic acids
• C07C 69/96 - Esters of carbonic or haloformic acids
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a resin composition for a plastic optical lens, and more specifically to a resin composition for a urethane optical lens having high thermal resistance and high reactivity. The resin composition for an optical lens of the present invention uses an optical resin prepolymer which is obtained from a preceding side reaction of a mercapto compound and a –SH/-NCO of isophorone diisocyanate or dicyclohexylmethanediisocyanate in appropriate mole ratios. The use of isophorone diisocyanate or dicyclohexylmethanediisocyanate results in enhancement of the thermal resistance of the optical lens, and the use of optical resin prepolymer at 20~70 weight % of the total weight of the resin composition for the optical lens, elutes the adhesive from adhesive tape due to lowered reactivity which results in a higher temperature reaction thereby resolving the problems of whitening phenomenon and foaming which occur on the edge of the lens due to a leak of the liquid composition when the reaction temperature increases.

IPC Classes  ?

• C08L 75/04 - Polyurethanes
• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• G02B 5/30 - Polarising elements
• G02B 1/10 - Optical coatings produced by application to, or surface treatment of, optical elements

Abstract

The present invention relates to a resin composition for a high refractive index optical lens having superior impact resistance, to a high refractive index optical lens using same, and to a method for producing same. More particularly, the present invention relates to a resin composition for an optical lens which has superior impact resistance and heat resistance after being multicoated, which is lightweight, and which has superior workability including formability, dyeability, etc., and superior optical properties including Abbe number, transparency, ultraviolet barrier properties, etc. The present invention also relates to a high refractive index optical lens using same.

IPC Classes  ?

• C08L 75/02 - Polyureas
• C08G 18/52 - Polythioethers
• C08G 18/74 - Polyisocyanates or polyisothiocyanates cyclic
• G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics

Abstract

The present invention relates to a resin composition which can be used for manufacturing a plastic optical lens. More specifically, the lightweight high-refraction resin composition for optical lenses and an optical lens using the same are obtained by reacting novel thiol compound and isocyanate compound. The optical lens manufactured using the resin compound of the present invention: is light due to a low specific gravity, is highly heat-resistant due to a high heat distortion temperature, and reduces production costs due to a low rate of raw materials and a high yield rate.

IPC Classes  ?

• C08K 5/37 - Thiols

Abstract

An optical resin composition with superior impact resistance and a method for producing an optical lens from the composition are disclosed. In one embodiment, the optical resin composition for a plastic optical lens has superior impact resistance as well as light-weight, superior moldability, excellent dyeing ability, a high Abbe number and good transparency. The optical lens produced from the composition exhibits superior impact resistance even after multi-coating. The optical resin composition with superior impact resistance has a solid refractive index (nD) of about 1.53 to about 1.57, an Abbe number of about 35 to about 48, a liquid specific gravity of about 0.97 to about 1.25 and a solid specific gravity of about 1.10 to about 1.35, by which the composition comprises a mixture of isophorone diisocyanate and hexamethylene diisocyanate, pentaerythritol tetrakis(3-mercaptopropionate), a UV absorber, a release agent and a polymerization initiator. The optical lens is produced by thermally curing the composition.

IPC Classes  ?

• B29D 11/00 - Producing optical elements, e.g. lenses or prisms