Abstract

A preparation method for an acrylic polymer leveling agent, comprising: polymerizing different types of (meth)acrylic acid low-carbon alkyl ester monomers, olefin monomers, and vinyl silicone resins in a polyhydroxy polyether solvent under the action of an initiator to obtain polymer 1; polymerizing different types of hydroxyalkyl acrylates in the polyhydroxy polyether solvent under the action of the initiator to obtain polymer 2; and finally compounding polymer 1 and polymer 2 to obtain a leveling agent. The introduction of the vinyl silicone resins in polymer 1 promotes the wetting of a substrate by the leveling agent and eliminates shrinkage cavities, to form a low-surface-energy interface on the surface of a coating, thereby controlling the surface state of the coating and avoiding problems such as orange peel, shrinkage cavities, flooding and floating, sagging, and brush marks on the surface of the coating. The introduction of the polyhydroxy polyether solvent in the polymer synthesis process improves the compatibility and leveling performance of the leveling agent.

IPC Classes  ?

• 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
• C08F 220/20 - Esters of polyhydric alcohols or phenols
• C08F 230/08 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
• C08F 212/08 - Styrene
• C08F 283/06 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polyethers, polyoxymethylenes or polyacetals
• C09D 7/47 - Levelling agents

Abstract

A preparation method for a stable fatty alcohol emulsion. A silane coupling agent is used for carrying out surface modification on silicon dioxide to finally obtain modified silicon dioxide, and the modified silicon dioxide is adsorbed on the interface of defoaming active substances and water, so that the active substances are dispersed, the problem of product creaming caused by aggregation is avoided, and the defoaming performance of the product is improved; in addition, during emulsification, a non-ionic surfactant and an acrylate polymer act synergistically to emulsify the active substances, so that the stability of the emulsion is further improved.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• D21H 21/12 - Defoamers

Abstract

A preparation method for a non-silicon emulsion defoaming agent, which method comprises: (1) uniformly mixing and stirring a specified amount of a higher fatty alcohol fatty acid ester, a fatty alcohol polyoxyethylene ether and a polyol to form a mixture M; (2) mixing and heating a specified amount of a higher fatty alcohol and paraffin to 70-100℃, uniformly stirring and mixing same, maintaining the temperature constant, slowly adding the mixture M thereto, and stirring same until uniformly mixed; (3) cooling same to room temperature, adding an anionic surfactant thereto, uniformly stirring and mixing the mixture, slowly adding water to the mixture, and then further emulsifying the mixture by means of a high-speed shearing device; and (4) finally adding a thickening agent thereto, and adjusting the mixture to the required viscosity.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• D21H 21/12 - Defoamers

Abstract

The present invention aims to provide a mineral oil defoamer having defoaming performance, stability and compatibility. A metallic soap and part of mineral oil are mixed, heated to a temperature 5-10°Ϲ above the melting point of the metallic soap and then rapidly cooled to 50-70°Ϲ to form a mixture M, where the metallic soap forms a new lattice, thereby improving the defoaming performance of the defoamer; OPE wax having a specific acid value and part of mineral oil are mixed, heated to a temperature 10-20°Ϲ above the melting point of the OPE wax and then rapidly cooled to 50-70°Ϲ to form a mixture N, thereby improving the stability of the defoamer by using the gel characteristic of the OPE wax; and finally, the mixture M, the mixture N and an emulsifier are mixed in a normal-temperature state to obtain a final mineral oil defoamer.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention provides an organic silicon composition and a preparation method therefor. The method comprises: reacting hydrogen-containing polyorganosiloxane, fluorine-containing acrylate, and hydroxyalkyl acrylate under the action of a chloroplatinic acid catalyst to obtain a mixture, wherein introduction of the fluorine-containing acrylate improves the foam removal and inhibition performance, and introduction of the hydroxyalkyl acrylate improves the compatibility of the composition; further reacting the mixture with a coupling agent and silicon dioxide under the action of an alkali catalyst to form a mesh structure, wherein an active group in a silane coupling agent reacts with a hydroxyl group on the surface of the silicon dioxide and a hydroxyl group on the surface of the mixture, so that the dispersity of the silicon dioxide in the system is improved, the silicon dioxide can be dispersed and fixed in the system, and the problem of attenuation of the foam removal and inhibition performance caused by aggregation of the silicon dioxide in the later stage of foam removal of the composition is avoided; and finally adding an MQ silicone resin and silicone polyether, so that the foam removal and inhibition performance is further improved, and the dispersity of the organic silicon composition is improved, and later emulsification processing is facilitated. The finally formed organic silicon composition has high foam removal speed and good foam inhibition performance in anionic and nonionic systems, and can be widely used for removing harmful foams in industrial production.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C08L 83/04 - Polysiloxanes
• C08L 83/12 - Block- or graft-copolymers containing polysiloxane sequences containing polyether sequences

Abstract

The present invention aims to provide a preparation method for an amide mineral oil type defoamer, the method comprising: first mixing in part of mineral oil hydrophobic white carbon black and fatty acid amide, and grinding same by means of a colloid mill, so as to reduce the phenomenon of large particles of the fatty acid amide in later stages, thus improving the defoaming and foam inhibition performance; heating a dispersion liquid obtained after the grinding to increase the temperature to be 5-10℃ above the melting point of the fatty acid amide; and then adding the dispersion liquid into the mineral oil for rapid cooling, and reducing the temperature to be 5-10℃ above the condensate point of the fatty acid amide, so as to avoid system viscosity rise and stratification which are caused by fatty acid amide gels, thus improving the product stability.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A high-concentration powder solid defoaming agent and a preparation method therefor. A special forming agent and an auxiliary forming agent are compounded to improve curing forming effect of the defoaming agent; an acrylate polymer, which is the auxiliary forming agent, is introduced to improve defoaming performance of the defoaming agent; a rewet bond agent is then introduced to further improve the curing effect of the product, thereby preventing wetting of the product by the moisture in air; and finally, spray drying is carried out to obtain the high-concentration powder solid defoaming agent, which has advantages of lasting defoaming performance, less liability in moisture absorption and caking, high content of active substances, convenience for customers to use, etc., such that transportation and storage costs are greatly reduced, and side effects of the defoaming agent on an application system are reduced.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A defoaming composition having acrylate polymers as the main active substances. The defoaming composition has excellent defoaming and foam suppression properties and good compatibility in a foaming system. The defoaming composition is synthesized by a solution polymerization method, and the specific preparation method comprises: 1) preparing a polymer X by means of a methyl/alkyl acrylate (1-8 alkyls) monomer A and/or a methyl/hydroxyalkyl acrylate B, an organic solvent S, and an initiator I according to a solution polymerization method known in the industry; 2) preparing a polymer Y by means of a methyl/alkyl acrylate (9-18 alkyls) monomer D and/or an olefin monomer O, the organic solvent S, and the initiator I according to the solution polymerization method known in the industry; 3) preparing a polymer Z by means of all monomers used for the polymer X and polymer Y, a crosslinking agent monomer C, a hydrophobic particle K, the organic solvent S, and the initiator I according to the solution polymerization method known in the industry; and 4) uniformly mixing the polymers X, Y and Z by means of a shearing device to obtain the defoaming composition. The polymer X has a low glass transition temperature and a low molecular weight, and mainly achieves rapid spreading and rapid dispersing functions; the polymer Y has an appropriate molecular weight and mainly achieves a foam suppression function; on the one hand, the polymer Z acts as a solvent to fully mix the polymer X and the polymer Y because the polymer Z comprises both the structures of the polymer X and the polymer Y, and on the other hand, the polymer Z also has a foam suppression function due to the macromolecular network structure thereof.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

An amide polymer molecular-level defoamer and a preparation method, wherein the amide polymer molecular-level defoamer consists of 20-45% of an amide polymer, 5-15% of carrier oil, 2-6% of fumed silica, 3-8% of metallic soap, and 15-75% of water. The present invention has the following advantages: a fatty polyamine compound and a monobasic fatty acid compound are subjected to a dehydration condensation reaction, so that a multi-branched active material in a molecular structure is finally prepared; and the defoamer formed by the multi-branched structure compound can, on the one hand, make the surface of the liquid film extremely easy to crack instantly, and on the other hand, effectively break some bubbles having relatively high density, so that the defoamer has high performance in terms of both defoaming and foam inhibition.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C11D 1/66 - Non-ionic compounds
• C10M 173/02 - Lubricating compositions containing more than 10% water not containing mineral or fatty oils
• B01D 17/00 - Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion

Abstract

A polymer defoamer and a preparation method. The polymer defoamer mainly consists of the following raw materials in percentage by weight: 12-35% of a polymer, 2-8% of silica, 3-10% of metallic soap, and 40-85% of carrier oil, wherein the polymer is a main active substance. The preparation method for the polymer defoamer is simple in process, low in cost, and excellent in performance, and can be widely used in papermaking pulping, coating, ink, binder, fermentation and other industries.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A defoaming composition is composed of a composition E composed of a hydrogen bond donor polyether modified polysiloxane C and a hydrogen bond acceptor X, and a composition F composed of a hydrogen bond donor fatty alcohol polyether D and a hydrogen bond acceptor Y; and the polyether modified polysiloxane C is composed of a polyorganosiloxane A and an allyl polyether B. The general structural formula of the polyorganosiloxane A is R02HSiO (Me2SiO)aSiHR02, where R0 is C1-12 alkyl, cycloalkyl or aryl, and a=10-100. The general structural formula of the allyl polyether B is CH2═CHCH2(OCH2CH2)b(OCH2CHCH3)cOH, where b=1-10, and c=10-100. The general structural formula of the fatty alcohol polyether D is R1(OCH2CH2)m(OCH2CHCH3)nOH, where R1 is C3-20 linear or branched alkyl, cycloalkyl or aralkyl; m=1-50; and n=10-100. The hydrogen bond acceptors X and Y are menthol, menthene, thymol, terpilenol, carveol or perillyl alcohol.

IPC Classes  ?

• C09D 7/65 - Additives macromolecular
• C09D 15/00 - Woodstains
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

According to the present invention, the applicability of an anti-foaming agent in a cationic foaming system is improved by introducing cationic thickening agents in batches. A preparation method comprises: mixing silicone polyether, some cationic thickening agents, and some water to obtain a mixture M; and mixing the rest thickening agents with water to obtain a mixture N; and emulsifying an anti-foaming agent active matter and an emulsifier mixture, and then respectively adding the mixture A and the mixture B to finally obtain an organic silicon anti-foaming agent. The anti-foaming agent has long-lasting anti-foaming performance in the cationic foaming system, and does not cause problems such as precipitation.

IPC Classes  ?

• B01F 17/54 - Silicon compounds
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The goal of the present invention is to provide an organosilicone emulsion and a preparation method. First, hydrogen-containing polyorganosiloxane and hydrophobic particles react under the action of a catalyst to prepare an active material, preferably a compound emulsified active substance of polyether-modified polysiloxane and glycerin fatty acid ester. The glycerin fatty acid ester not only has emulsifying properties, but also has certain anti-corrosion properties. The finally prepared organosilicone emulsion is stable, and has excellent performance.

IPC Classes  ?

• C08J 3/03 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
• C08L 83/00 - Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon onlyCompositions of derivatives of such polymers
• C08L 83/04 - Polysiloxanes
• C08L 83/05 - Polysiloxanes containing silicon bound to hydrogen

Abstract

Provided is a method for preparing an organosilicon defoaming composition, the aim of which is to introduce a capping agent to effectively control the degree of crosslinking during the preparation of a crosslinked silicone grease, which method ensures the consistency of the viscosity of a defoaming composition, improves the defoaming and foam inhibition performances of the organosilicon defoaming composition, and facilitates the use of the composition for later emulsification. The defoaming composition can be widely used to eliminate harmful foams in industrial production.

IPC Classes  ?

• B01F 17/54 - Silicon compounds
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention relates to an organic silicon defoaming composition. Firstly, a vinyl polyorganosiloxane is reacted with a hydrogen-containing polyorganosiloxane at a certain molar ratio, a reaction control agent is then added dropwise, and finally, the polymer is mixed with a silicon resin and a filler such as silicon dioxide in order to prepare the organic silicon defoaming composition. The defoaming composition is prepared using a method of dropwise adding a reaction control agent. The reaction is mild and easy to control, the problems that the reactants are prone to gelling, the active substance is unstable in storage, etc. are solved, and the prepared active substance has a good and durable defoaming performance in a high-temperature strong base system.

IPC Classes  ?

• B01F 17/54 - Silicon compounds
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

Provided are an organosilicon defoaming composition and a preparation method therefor. Firstly, vinylorganopolysiloxane and a hydrogen-containing organopolysiloxane are reacted, and then allyl polyether is introduced to continue the reaction, thereby ensuring the defoaming performance of the organosilicon composition and improving the later emulsification performance.

IPC Classes  ?

• B01F 17/54 - Silicon compounds
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

Disclosed is an organosilicon composition. A hydroxyl polyorganosiloxane reacts with an organosilicon resin under the catalysis of a titanium catalyst, then a platinum catalyst and a hydrogen-containing polyorganosiloxane are added for reaction, and a hydrophobic particle mixing treatment is performed to finally obtain the organosilicon composition. An organosilicon emulsion prepared using this composition has a good inhibition effect for foams in an anion surfactant-rich system.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C08L 83/05 - Polysiloxanes containing silicon bound to hydrogen
• C08L 83/06 - Polysiloxanes containing silicon bound to oxygen-containing groups
• C08G 81/00 - Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
• C08K 3/36 - Silica

Abstract

Disclosed are a green solid defoamer and a preparation method therefor. In the defoamer, using a natural oil as a defoaming active ingredient, a mineral compound and a biological compound as carriers, and polyglycerol as a structural agent, a green solid defoamer product is prepared by means of an atomic economic process. The steps for preparing the green solid defoamer involve: (1) adding the carriers into a mixer M1, and stirring same until uniform; (2) simultaneously adding the defoaming active ingredient and the structural agent into M2, and stirring same until uniform; (3) adding the mixture in (2) into the mixer M1, and stirring same until uniform; and (4) crushing or granulating the mixture obtained in (3), with the obtained mixture being the prepared green solid defoamer. The green solid defoamer is not only green and environmentally friendly and biodegradable, but also has stronger defoaming and foam-inhibiting properties and anti-attenuation performance.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

Disclosed is an organosilicon composition. A hydrogen-containing polyorganosiloxane reacts with hydrophilic silica and an organosilicon resin, then a hydroxyl polyorganosiloxane is added and a hydrophobic particle mixing treatment is performed to obtain the organosilicon composition. The organosilicon composition has a long branch chain siloxane space structure, which significantly increases the defoaming and foam-inhibiting properties and dispersing performance of the organosilicon composition, and simultaneously improves the binding force of the organosilicon composition to an organic material. A synthesized organosilicon emulsion has a good inhibition effect on foams in an anion surfactant-rich system.

IPC Classes  ?

• C08L 83/05 - Polysiloxanes containing silicon bound to hydrogen
• C08L 83/06 - Polysiloxanes containing silicon bound to oxygen-containing groups
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention provides an organosilicon composite emulsion defoamer for papermaking industry, and a preparation method therefor. First, a polyvinyl ester polymer is introduced, so as to improve the foam breaking and defoaming performance, in particular, to enhance the defoaming effect in a long-chain foaming medium by means of specific molecular weight design, and to implement stabilization and protection functions for an emulsion. Second, polyether modified silicone oils having different HLB values, i.e., a high HLB value, an intermediate HLB value, and a low HLB value, are introduced as emulsifiers, the polyether modified silicone oil having a structure similar to that of a silicone paste, being not prone to be separated from a silicone grease, and greatly improving the storage stability and defoaming durability of the emulsion, and in addition, polyether modified organosilicon introduced having very low surface tension near a cloud point thereof and also having a good defoaming function. The defoamer is prepared by using a method of emulsification at room temperature, the preparation process is simple, energy-saving, and convenient for industrial production, and the resulting defoamer has high defoaming efficiency, good defoaming durability, and good product dilution stability and storage stability.

IPC Classes  ?

• D21H 21/12 - Defoamers
• D21H 17/36 - PolyalkenylalcoholsPolyalkenylethersPolyalkenylesters
• D21H 17/37 - Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
• C08L 33/08 - Homopolymers or copolymers of acrylic acid esters
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention provides a preparation method for a fatty alcohol emulsion defoaming agent. Two kinds of long chain fatty alcohols having different carbon chains are introduced and compounded for use, so as to improve the foam inhibiting performance of the defoaming agent. During preparation, the fatty alcohol and paraffin are separately emulsified into emulsions and then are compounded into a final defoaming agent emulsion, thereby avoiding the problem that the stability of a product is poor because there are excessive emulsions during emulsification; during the separate emulsification of the fatty alcohol, the fatty alcohol and an ether substance are compounded, and then the fatty alcohol is emulsified by using a water phase method, thereby improving the defoaming and foam inhibiting performance while more completely emulsifying the fatty alcohol.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention discloses a polymer emulsion-type defoaming agent and a preparation method therefor. Components comprise an active substance, filler particles, water, and a thickening agent, wherein the active substance is made up of an acrylate, an allyl polyether, and a catalyst; by means of the allyl polyether containing a hydrophilic functional group being introduced within a polymer chain segment of the acrylate, during the process of synthesis, the introduction of the allyl polyether solves the environmental problem caused by a harmful solvent such as toluene being used in a traditional process of synthesis of an acrylate; a polymer macromolecule having a self-emulsifying function is formed via a double bond addition reaction, emulsification can be performed in water, and an emulsion having different particle size ranges is formed; the polymer emulsion, due to being able to self-emulsify and form emulsion, solves a series of problems such as floating oil, separation, and demulsification caused when a traditional organic silicon emulsion-type defoaming agent uses emulsifying agents.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C08J 3/03 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
• 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
• C08F 220/14 - Methyl esters
• C08F 283/06 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polyethers, polyoxymethylenes or polyacetals
• C08F 265/06 - Polymerisation of acrylate or methacrylate esters on to polymers thereof
• C08F 290/02 - Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
• C08K 3/36 - Silica
• C08K 3/22 - OxidesHydroxides of metals
• C08K 5/20 - Carboxylic acid amides
• C08K 5/098 - Metal salts of carboxylic acids

Abstract

An organosilicon composition consisting of an organosilicon active material, a polyether modified polysiloxane, a hydrophobic filler, an ester compound and a surfactant, said organosilicon composition addressing the disadvantage of various components not being compatible for mixing. The preparation method for the organosilicon composition is as follows: a separately prepared mixture I is added to a mixture II, and a high-shear device is used to perform mixing at a rotational speed of 1000-3000 rpm for 0.5-3 h; then silicon dioxide is added and mixing is continued for 1-3 h, producing a mixture III. Mixture III is added into the ester and even stirring is performed by means of a high-shear device at a rotational speed of 15000-25000rpm, producing a mixture IV. Finally, an emulsifier is added into mixture IV and even mixing is performed, producing the organosilicon composition.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

Provided is a method for preparing a spherical solid defoamer by using a micro-channel. The method comprises: using three fluid components, that is, an oil-phase defoamer composition, a water-phase chitosan solution, and an oil-phase emulsifier; by means of a double T-shaped micro-channel device, using microfluidic technology to prepare an O/W/O emulsion; and then combining photoinitiation technology, and preparing a continuous and uniform spherical chitosan encapsulated solid defoamer product. The wrapping performance of chitosan during the use of a defoamer has a slow release performance, ensuring that the defoamer has excellent foam-inhibiting performance at a later stage; meanwhile, microfluidic technology can achieve a continuous production process, avoiding intermittent operation, and improving production efficiency.

IPC Classes  ?

• B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
• B01J 19/12 - Processes employing the direct application of electric or wave energy, or particle radiationApparatus therefor employing electromagnetic waves
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A defoamer used for a thin-layer self-leveling mortar, and a preparation method therefor. The defoamer components comprise silica, polyether, fatty alcohol, and alkynol silicon polyether. The preparation method is as follows: (1) first, mix and stir the fatty alcohol and a portion of the silica to form a dispersion M1; (2) prepare the alkynol silicon polyether, then add the dispersion M1 and the polyether, producing a dispersion M2 after mixing; (3) at a given temperature and a given rotational speed, slowly spray the dispersion M2 onto A2 by means of a metering pump, producing M3 after mixing; finally, pass M3 through a sieve to produce a solid defoamer. The prepared solid defoamer is specifically used for solving the problems of thin-layer self-leveling mortar surface cracking and hollowing. The defoamer has a simpler preparation method in comparison to traditional defoamers while exhibiting good defoaming and foam-inhibiting performance, not affecting the stability of a self-leveling mortar system, and being able to significantly improve the surface properties of the self-leveling mortar.

IPC Classes  ?

• C04B 24/42 - Compounds having one or more carbon-to-silicon linkages
• C04B 103/50 - DefoamersAir detrainers

Abstract

Provided is a method for preparing polyether modified polyorganosiloxane, comprising the steps of firstly preparing azide-terminated polyorganosiloxane and alkynyl-terminated polyether polyol, and then using "Click Chemistry" technology to obtain polyether modified silicone oil having a hyperbranched structure, which has, compared with the branched and crosslinked polyether modified silicone oils prepared by traditional platinum catalysis, a highly soluble, highly crosslinked internal branched skeleton and internal cavity, and a large number of terminal functional groups, so that the polyether modified silicone oil has an excellent emulsifying capacity. The organic silicon defoamer prepared by the method is smaller in particle size, better in stability and superior in defoaming performance.

IPC Classes  ?

• C08G 77/46 - Block- or graft-polymers containing polysiloxane sequences containing polyether sequences
• B01F 17/54 - Silicon compounds

Abstract

A defoaming composition comprising: A. a main monomer, which refers to a non-ionic monomer which only contains one vinyl group in one molecule and can form a polymer that is soluble in an organic solvent; O. a functional monomer olefin, which is any one or a mixture of a linear α-olefin, an α-aromatic olefin or a branched α-olefin; C. a functional monomer crosslinking agent, which refers to a monomer which at least contains two or more vinyl groups in one molecule and can form a polymer that is soluble in an organic solvent; I. an initiator; S. an organic solvent; P. a hydrophobic particle.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C08F 220/20 - Esters of polyhydric alcohols or phenols
• C08F 220/40 - Esters of unsaturated alcohols
• 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
• C08F 220/14 - Methyl esters
• C08F 210/14 - Monomers containing five or more carbon atoms
• C08F 283/12 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polysiloxanes
• C08F 222/14 - Esters having no free carboxylic acid groups

Abstract

Disclosed is a defoaming composition. The defoaming composition is composed of composition E and composition F. The composition E is composed of a hydrogen bond donor, polyether modified polysiloxane C, and a hydrogen bond acceptor X. The composition F is composed of a hydrogen bond donor, fatty alcohol polyether D, and a hydrogen bond acceptor Y. The polyether modified polysiloxane C is composed of polyorganosiloxane A and allyl polyether B. The defoaming composition provided in the present invention introduces hydrogen bond acceptors on the basis of silicone polyether and polyether to generate new substances by means of reaction, so as to improve the compatibility with application systems while achieving the defoaming performance.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C09D 7/65 - Additives macromolecular
• C08G 77/46 - Block- or graft-polymers containing polysiloxane sequences containing polyether sequences

Abstract

A defoamer for a transparent liquid detergent, consisting of the following components: (1) 5-40% of an organic silicon active material; (2) 10-80% specific space polyether modified polyorganosiloxane; (3) 10-80% polyether polyol; and (4) 1-10% silica. The preparation method thereof is as follows: (1) mixing the organic silicon active material and the specific space polyether modified polyorganosiloxane, heating to 50-150°C, and stirring for 0.5-1.5 h at a stirring speed of 100-600 rpm; (2) maintaining a constant temperature, adding the polyether polyol and the silica while stirring, and stirring for 1.0-2.0 h at a stirring speed of 100-600 rpm; and (3) homogenizing the mixture by means of a colloid mill or a homogenizer to obtain a defoamer.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C11D 3/60 - Mixtures of compounding ingredients
• D21H 21/12 - Defoamers

Abstract

An organosilicon composition and a preparation method therefor. A hydrogen-containing polyorganosiloxane is reacted with an unsaturated polyether, and undergoes a hydrosilylation reaction with a dimethyl hydrogen-terminated vinyl polyorganosiloxane after the reaction is completed, and an alkali treatment is carried out. A flow-state crosslinked polymer having a spatial structure is formed by using the hydrogen-containing polyorganosiloxane to effectively control the cross-linking viscosity. At the same time, the addition of the unsaturated polyether improves the dispersion property of the organosilicon composition. An organopolysiloxane defoaming agent can be prepared by using the organosilicon composition above as a main body, has a good foam suppression performance in a high temperature and strong alkali system. At the same time, the organosilicon composition has good dispersability in the use process, and is not easy to undergo agglomeration and precipitation, improving the foam suppression performance and enhancing the future application performance.

IPC Classes  ?

• C08G 77/46 - Block- or graft-polymers containing polysiloxane sequences containing polyether sequences
• C08K 3/36 - Silica

Abstract

The present invention belongs to the technical field of fine chemical formulation, and particularly relates to a polymer defoamer and a preparation method therefor. The polymer defoamer comprises an acrylate polymer, an organic solvent carrier, an inorganic filler, and a catalyst. The acrylate polymer is prepared from the following raw material components: monomer-1, monomer-2, monomer-3, an olefin, a diluent, an initiator, and a chain transfer agent. The monomer-1 is alkyl acrylate. The monomer -2 is alkyl methacrylate. The monomer-3 is hydroxyalkyl acrylate. The defoamer of the present invention uses an acrylate polymer as a main active material. The defoamer has excellent foam suppression performance, and is particularly suitable for the application in a strong base system for pulping and papermaking.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• 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
• C08F 220/20 - Esters of polyhydric alcohols or phenols
• C08F 220/14 - Methyl esters
• C08F 210/14 - Monomers containing five or more carbon atoms

Abstract

A solid defoaming agent for a self-leveling mortar and a preparation method therefor. On one hand, a high-carbon alcohol is used for the high-temperature treatment of white carbon black, which improves the defoaming ability of the defoaming agent at the surface of a self-leveling mortar system; at the same time, a carrier is sprayed using the high-carbon alcohol to improve the storage stability of the defoaming agent and improve the degassing performance of the defoaming agent; on the other hand, the presence of a hydrophilic group in a polyether increases the emulsification and dispersion effect of the polyether, and improves the compatibility of the defoaming agent in the mortar; the prepared defoaming agent is specially used for defoaming and foam suppression in a high-speed shear mixing process of a self-leveling mortar containing various additives. Compared to traditional defoaming agents, the present defoaming agent has a simple preparation method and has good defoaming and foam suppression properties, does not affect the stability of the self-leveling mortar system, and may improve the compressive strength of the self-leveling mortar.

IPC Classes  ?

• C04B 24/32 - Polyethers, e.g. alkylphenol polyglycolether
• C04B 103/50 - DefoamersAir detrainers

Abstract

A non-silicon defoaming agent, includes an acrylate polymer, an organic solvent carrier, hydrophobic particles and defoaming auxiliaries; and the acrylate polymer is prepared from following raw material components: monomer-1, monomer-2, unsaturated terminated polyether, alkene, diluent and initiator. The present invention further includes a preparing method for the non-silicon defoaming agent and the application of the non-silicon defoaming agent to the defoaming and foam inhibiting in systems rich in anionic surfactants. The defoaming agent takes the acrylate polymer as the main active substance and has excellent defoaming and foam inhibiting performance. By dropwise adding monomers, the defoaming performance of the acrylate polymer is improved, by using unsaturated terminated polyether to modify, the hydrophilia of the acrylate polymer is improved, the instant defoaming capacity is further improved, and by the alkene with the carbon atoms of 6-22 to modify, the foam inhibiting performance of the defoaming agent is improved.

IPC Classes  ?

• C08L 51/08 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C08F 220/28 - Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
• 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
• C08F 283/06 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polyethers, polyoxymethylenes or polyacetals

Abstract

A hydrophobic composition, composed of a hydrogen bond acceptor A and a hydrogen bond donor B; the hydrogen bond acceptor A is one or a mixture of more than one selected from among quaternary ammonium salt, polysiloxane quaternary ammonium salt, a monoterpene alcohol compound, and an amide compound, while the hydrogen bond donor B is one or a mixture of more than one selected from among a polyether, silicone polyether, and hydroxy silicone oil. The hydrophobic composition may be applied in the fields of extractants, solvents for inorganic material synthesis, anti-foaming agents, and so on.

IPC Classes  ?

• C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects producedFilling pastes
• C09D 183/00 - Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon onlyCoating compositions based on derivatives of such polymers
• C09D 183/12 - Block or graft copolymers containing polysiloxane sequences containing polyether sequences

Abstract

Disclosed are a non-silicon defoaming agent and a preparation method therefor. In the method, a vegetable oil and a derivative thereof are used as a carrier, white carbon black and fatty acid metal soap are used as main defoaming substances, and hydrogenated castor oil substances and castor oil polyoxyethylene polyoxypropylene ether oleate are introduced, so as to ensure the defoaming and foam-inhibiting properties, stability and compatibility of a product.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention belongs to the technical field of fine chemical engineering, and discloses a non-silicon defoaming agent, comprising an acrylate polymer, an organic solvent carrier, hydrophobic particles and defoaming auxiliaries; and the acrylate polymer is prepared from following raw material components: monomer-1, monomer-2, unsaturated terminated polyether, alkene, diluent and initiator. The present invention further discloses a preparing method for the non-silicon defoaming agent. The present invention further discloses the application of the non-silicon defoaming agent to the defoaming and foam inhibiting in systems rich in anionic surfactants. The defoaming agent in the present invention takes the acrylate polymer as the main active substance and has excellent defoaming and foam inhibiting performance. By dropwise adding monomers, the defoaming performance of the acrylate polymer is improved, by using unsaturated terminated polyether to modify, the hydrophilia of the acrylate polymer is improved, the instant defoaming capacity is further improved, and by the alkene with the carbon atoms of 6-22 to modify, the foam inhibiting performance of the defoaming agent is improved.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C08F 210/14 - Monomers containing five or more carbon atoms
• 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
• C08F 283/06 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polyethers, polyoxymethylenes or polyacetals

Abstract

The present invention provides a method for preparing a hydrogen-containing silicone oil by using a solid acid. Firstly, a treatment agent is prepared by using an alcoholic material and deionized water. Then, a solid acid catalyst is treated under a low temperature condition by using the treatment agent to remove excess acid on the surface of the solid acid without destroying the structure of the solid acid, and at the same time, the low temperature condition avoids the rupture of the solid acid catalyst during the acid dissolution exothermic process. Finally, a reaction process for preparing the hydrogen-containing silicone oil is carried out only in inner channels of the solid acid catalyst. The acidic catalyst is slowly released and does not liberate into the hydrogen-containing silicone oil system. The viscosity of the hydrogen-containing silicone oil increases slowly, preventing the rapid polymerization during synthesis of the hydrogen-containing silicone oil. An acid neutralization process is not required in the preparation process, and the preparation process is simple. At the same time, the final hydrogen-containing silicone oil product has little acid residue, and the subsequent use of the hydrogen-containing silicone oil is not affected. For example, the silicon polyether prepared by using the hydrogen-containing silicone oil has an appearance clarity superior to silicon polyether prepared by other hydrogen-containing silicone oil.

IPC Classes  ?

• C08G 77/12 - Polysiloxanes containing silicon bound to hydrogen
• C08G 77/08 - Preparatory processes characterised by the catalysts used
• C08G 77/06 - Preparatory processes

Abstract

An antifoam composition for aqueous wood paints. Firstly, reacting a trimethyl-terminated polydimethylsiloxane, a hydrogen-containing organosilicone resin, a cage-type polysilsesquioxane POSS and silica to prepare an organosilicon antifoam active material, then synthesizing a silicone polyether of a specific structure, and finally compositing the synthesized organosilicon antifoam active material, the silicone polyether and polyether, such that the final antifoam composition is obtained. The antifoam composition is used in aqueous wood paints, and has excellent antifoam properties and compatibility.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C09D 7/65 - Additives macromolecular
• C08G 83/00 - Macromolecular compounds not provided for in groups
• C08G 77/46 - Block- or graft-polymers containing polysiloxane sequences containing polyether sequences

Abstract

A non-silicon defoamer, a preparation method therefor, and an application thereof for use in defoaming and antifoaming in an anionic surfactant-rich system. The non-silicon defoamer comprises an acrylate polymer, an organic solvent carrier, a hydrophobic particle, and a defoaming auxiliary. The acrylate polymer is made of the following raw material components: a monomer 1, a monomer 2, an unsaturated blocked polyether, an olefin, a diluent, and an initiator. The defoamer uses the acrylate polymer as a main active material. The monomers are added in a dropwise and stepwise manner, improving the defoaming performance of the acrylate polymer. The defoamer is modified by using the unsaturated blocked polyether, improving the hydrophilicity of the acrylate polymer, and further improving the instantaneous defoaming ability thereof. Additionally, the defoamer is modified by using the olefin having from 6 to 22 carbon atoms, improving the antifoaming performance of the defoamer.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• 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
• C08F 283/06 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polyethers, polyoxymethylenes or polyacetals
• C08F 210/14 - Monomers containing five or more carbon atoms

Abstract

An organic silicon defoaming agent composition, which consists of the following substances: A, an organic silicon active matter, the content in parts by weight of the organic silicon active matter in the defoaming agent composition being 5-40 parts; B, a polyether-polydiorganosiloxane, the polyether-polydiorganosiloxane having a general structural formula (I), and the content in parts by weight of the polyether-polydiorganosiloxane in the defoaming agent composition being 10-70 parts; and C, a polyetherpolyol, the structure of the polyetherpolyol having a general formula: R 5[(EO) m(PO) nH] g, and the content in parts by weight of the polyetherpolyol in the defoaming agent composition being 10-80 parts.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• B01F 17/54 - Silicon compounds

Abstract

Provided is a defoaming agent for a liquid detergent, comprising the following components: component A1, a modified polyorganosiloxane formed by reacting a hydrogen-containing polyorganosiloxane, an unsaturated polyether and an α-olefin; component A2, a modified polyorganosiloxane formed by reacting a hydrogen-containing polyorganosiloxane, an unsaturated polyether and a bivinyl-terminated polyorganosiloxane; component B, an organosilicon composition composed of a hydrogen-containing organopolysiloxane, a polymer composed of an acrylate and an α-olefin, silicon dioxide and an organosilicon resin; component C, a thickening agent; and component D, water. An excellent compatibility between the modified polyorganosiloxanes A1 and A2 enables the defoaming agent to exhibit an excellent defoaming property, stability and clarity in a laundry detergent.

IPC Classes  ?

• C11D 3/37 - Polymers
• C11D 3/60 - Mixtures of compounding ingredients
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C11D 3/00 - Other compounding ingredients of detergent compositions covered in group
• C08L 83/04 - Polysiloxanes