A fiber reinforced polyester polymer composition is disclosed that contains at least one tribological modifier. The tribological modifier may comprise an ultra-high molecular weight silicone alone or in combination with polytetrafluoroethylene particles. The composition not only has excellent tensile properties but also can produce a low friction surface.
C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds
C08L 67/03 - Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the hydroxy and the carboxyl groups directly linked to aromatic rings
C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer. The polyethylene particles are particularly selected so that the particles rapidly form a homogeneous gel-like material when combined with the plasticizer during gel processing. In one embodiment, the polyethylene used to produce the particles has a relatively low bulk density. Alternatively or in addition, the particles can have a carefully controlled particle size distribution. Polymer articles such as fibers and films can be produced having little to no imperfections.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer, reinforcing fibers, and at least one tribological modifier. The tribological modifier, in one embodiment, can comprise a graft copolymer. The use of a graft copolymer has been found to unexpectedly and dramatically improve noise generation when tested against various substrates, especially glass substrates.
01 - Chemical and biological materials for industrial, scientific and agricultural use
02 - Paints, varnishes, lacquers
19 - Non-metallic building materials
Goods & Services
Chemicals for scientific and industrial use; artificial resins, glue for industrial purposes. Coloring matter, paints, varnishes, lacquers, mordants for surface treatment; primers. Building materials.
A polyamide composition comprising a polyamide; a plurality of inorganic fibers; and a flame retardant system comprising a zinc phosphinate and a nitrogen-containing polyphosphate is provided. At thicknesses of from about 0.4 to about 3.2 millimeters, the composition exhibits a Glow Wire Ignition Temperature of about 775° C. or more as determined in accordance with IEC-60695-2-13:2010; a Glow Wire End Product Temperature (without flame) of about 750° C. or more as determined in accordance with IEC-60335-1:2010; a Glow Wire Flammability Index of about 850° C. or more as determined in accordance with IEC-60695-2-12:2010; a V0 rating as determined in accordance with UL94; and/or a comparative tracking index of about 550 volts or more as determined in accordance with IEC 60112:2003.
A polymer composition is described well suited for being combined with relatively short fibers. The fibers, for instance, can have a mean fiber length of less than 1,000 microns, such as less than 700 microns, such as less than 500 microns. The polymer formulation allows for intimate mixing with the fibers without having to use a sizing agent. In one embodiment, the composition contains a polybutylene terephthalate polymer combined with a thermoplastic polymer having lower crystallinity.
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer and an acid scavenger. In accordance with the present disclosure, the acid scavenger is an inorganic compound that is insoluble in the plasticizer and/or any extractions solvents used during the process. In one embodiment, the acid scavenger is a magnesium aluminum hydroxide carbonate.
A fiber reinforced polyester polymer composition is disclosed that contains at least one tribological modifier. The tribological modifier may comprise an ultra-high molecular weight silicone alone or in combination with polyytetrafluoroethylene particles. The composition not only has excellent tensile properties but also can produce a low friction surface.
C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
C08L 67/03 - Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the hydroxy and the carboxyl groups directly linked to aromatic rings
C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer. The polyethylene particles are particularly selected so that the particles rapidly form a homogeneous gel-like material when combined with the plasticizer during gel processing. In one embodiment, the polyethylene used to produce the particles has a relatively low bulk density. Alternatively or in addition, the particles can have a carefully controlled particle size distribution. Polymer articles such as fibers and films can be produced having little to no imperfections.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer in combination with a tribological modifier system. The tribological modifier system may include the combination of a fluoropolymer with a high density polyethylene, such as an oxidized high density polyethylene. The particular formulation provides a synergistic blend of properties. For instance, the polymer composition not only has an excellent surface appearance when molded into articles but has excellent low friction characteristics when tested against aluminum.
C08L 59/02 - Polyacetals containing polyoxymethylene sequences only
C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
C08L 23/30 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bondCompositions of derivatives of such polymers modified by chemical after-treatment by oxidation
C10M 107/38 - Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
A medical grade polyoxymethylene polymer composition is disclosed that has been mass colored. The composition is particularly formulated so as to meet the standards of various governmental and safety requirements needed for use in medical applications and/or in food contact applications. In one embodiment, the polymer composition is formulated to meet the standards of USP Class VI testing and/or ISO 10993 testing.
A medical grade polyoxymethylene polymer composition is disclosed that has been mass colored. The composition is particularly formulated so as to meet the standards of various governmental and safety requirements needed for use in medical applications and/or in food contact applications. In one embodiment, the polymer composition is formulated to meet the standards of USP Class VI testing and/or ISO 10993 testing.
B32B 3/10 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
B32B 3/14 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by a face layer formed of separate pieces of material
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
A process for producing a cyclic acetal is disclosed. According to the process, a formaldehyde source is combined with an aprotic compound and contacted with a heterogeneous catalyst which causes the formaldehyde source to convert into a cyclic acetal such as trioxane. The catalyst, for instance, may comprise a solid catalyst such as an ion exchange resin. In one embodiment, the process is used for converting anhydrous formaldehyde gas to trioxane. The anhydrous formaldehyde gas may be produced form an aqueous formaldehyde solution by an extractive distillation. The aprotic compound and the formaldehyde solution may be extracted from the reaction product and recycled into the process.
B01J 8/02 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds
B01D 3/00 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
14.
PROCESS FOR PRODUCING A CYCLIC ACETAL IN A HETEROGENEOUS REACTION SYSTEM
A process for producing a cyclic acetal is disclosed. According to the process, a formaldehyde source is combined with an aprotic compound and contacted with a heterogeneous catalyst which causes the formaldehyde source to convert into a cyclic acetal such as trioxane. The catalyst, for instance, may comprise a solid catalyst such as an ion exchange resin. In one embodiment, the process is used for converting anhydrous formaldehyde gas to trioxane. The anhydrous formaldehyde gas may be produced form an aqueous formaldehyde solution by an extractive distillation. The aprotic compound and the formaldehyde solution may be extracted from the reaction product and recycled into the process.
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer and an acid scavenger. In accordance with the present disclosure, the acid scavenger is an inorganic compound that is insoluble in the plasticizer and/or any extractions solvents used during the process. In one embodiment, the acid scavenger is a magnesium aluminum hydroxide carbonate.
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer and an acid scavenger. In accordance with the present disclosure, the acid scavenger is an inorganic compound that is insoluble in the plasticizer and/or any extractions solvents used during the process. In one embodiment, the acid scavenger is a magnesium aluminum hydroxide carbonate.
A polymer composition is described well suited for being combined with relatively short fibers. The fibers, for instance, can have a mean fiber length of less than 1,000 microns, such as less than 700 microns, such as less than 500 microns. The polymer formulation allows for intimate mixing with the fibers without having to use a sizing agent. In one embodiment, the composition contains a polybutylene terephthalate polymer combined with a thermoplastic polymer having lower crystallinity.
A polymer composition is described well suited for being combined with relatively short fibers. The fibers, for instance, can have a mean fiber length of less than 1,000 microns, such as less than 700 microns, such as less than 500 microns. The polymer formulation allows for intimate mixing with the fibers without having to use a sizing agent. In one embodiment, the composition contains a polybutylene terephthalate polymer combined with a thermoplastic polymer having lower crystallinity.
Polyoxymethylene-polydimethylsiloxane block copolymers are disclosed. In one embodiment, the siloxane monomer used to make the polymer is soluble in the polyoxymethylene monomers, namely trioxane. The polymer can be formed having relatively small particle sizes, such as less than about 350 microns, such as less than about 200 microns, which makes the polymer well suited for powder coating applications.
Long chain branched polyoxymethylene-polydimethylsiloxane copolymers are described. The copolymers have excellent impact properties, shear thinning and slip wear properties in comparison to a polyoxymethylene polymer not containing polydimethylsiloxane groups.
A polyamide composition comprising a polyamide; a plurality of inorganic fibers; and a flame retardant system comprising a zinc phosphinate and a nitrogen-containing polyphosphate is provided. At thicknesses of from about 0.4 to about 3.2 millimeters, the composition exhibits a Glow Wire Ignition Temperature of about 775QC or more as determined in accordance with IEC- 60695-2-1 3:2010; a Glow Wire End Product Temperature (without flame) of about 750QC or more as determined in accordance with IEC-60335-1 :2010; a Glow Wire Flammability Index of about 850QC or more as determined in accordance with IEC-60695-2-1 2:2010; a V0 rating as determined in accordance with UL94; and/or a comparative tracking index of about 550 volts or more as determined in accordance with IEC 601 12:2003..
A polyamide composition comprising a polyamide; a plurality of inorganic fibers; and a flame retardant system comprising a zinc phosphinate and a nitrogen-containing polyphosphate is provided. At thicknesses of from about 0.4 to about 3.2 millimeters, the composition exhibits a Glow Wire Ignition Temperature of about 775° C. or more as determined in accordance with IEC-60695-2-13:2010; a Glow Wire End Product Temperature (without flame) of about 750° C. or more as determined in accordance with IEC-60335-1:2010; a Glow Wire Flammability Index of about 850° C. or more as determined in accordance with IEC-60695-2-12:2010; a V0 rating as determined in accordance with UL94; and/or a comparative tracking index of about 550 volts or more as determined in accordance with IEC 60112:2003.
Polymer compositions containing polyethylene particles having a multi- modal molecular weight distribution are disclosed. The polymer compositions are well suited to producing porous substrates through a sintering process. Formulations made according to the present disclosure can produce porous substrates having improved flexibility demonstrated by an increased flexural strength while still retaining excellent pressure drop characteristics.
C02F 1/00 - Treatment of water, waste water, or sewage
C08J 9/24 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof by surface fusion and bonding of particles to form voids, e.g. sintering
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
Polymer compositions containing polyethylene particles having a multi-modal molecular weight distribution are disclosed. The polymer compositions are well suited to producing porous substrates through a sintering process. Formulations made according to the present disclosure can produce porous substrates having improved flexibility demonstrated by an increased flexural strength while still retaining excellent pressure drop characteristics.
B29C 67/20 - Shaping techniques not covered by groups , or for porous or cellular articles, e.g. of foam plastics, coarse-pored
C08J 9/24 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof by surface fusion and bonding of particles to form voids, e.g. sintering
C02F 1/00 - Treatment of water, waste water, or sewage
B01D 69/02 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor characterised by their properties
C02F 3/20 - Activated sludge processes using diffusers
C08J 9/00 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof
B01D 39/16 - Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 67/00 - Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer. The polyethylene particles are particularly selected so that the particles rapidly form a homogeneous gel-like material when combined with the plasticizer during gel processing. In one embodiment, the polyethylene used to produce the particles has a relatively low bulk density. Alternatively or in addition, the particles can have a carefully controlled particle size distribution. Polymer articles such as fibers and films can be produced having little to no imperfections.
A po!ymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plastidzer. The polyethylene particles are particularly selected so that the particles rapidly form a homogeneous gel-like material when combined with the plastidzer during gel processing. In one embodiment, the polyethylene used to produce the particles has a relatively low bulk density. Alternatively or in addition, the particles can have a carefully controlled particle size distribution. Polymer articles such as fibers and films can be produced having little to no imperfections.
Thermally or electrically conductive high molecular weight polyethylene compositions are disclosed. The polymer compositions can contain thermally conductive particulate material, such as boron nitride. Alternatively or in addition the polymer composition may contain a thermally and electrically conductive material, such as an ionic liquid or graphite particles.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer, reinforcing fibers, and at least one tribological modifier. The tribological modifier, in one embodiment, can comprise a graft copolymer. The use of a graft copolymer has been found to unexpectedly and dramatically improve noise generation when tested against various substrates, especially glass substrates.
The present disclosure is generally directed to a fiber reinforced polyoxymethylene polymer composition having extremely low formaldehyde emission characteristics. The polymer composition generally contains reinforcing fibers in an amount from 3% to 70% by weight. The reinforcing fibers are combined with a polyoxymethylene polymer having a relatively high melt volume flow rate. The polymer composition can also contain a coupling agent for better integrating the reinforcing fibers into the polymer matrix. In addition to low emission properties, the polymer composition of the present disclosure displays excellent mechanical properties.
The present disclosure is generally directed to a fiber reinforced polyoxymethylene polymer composition having extremely low formaldehyde emission characteristics. The polymer composition generally contains reinforcing fibers in an amount from 3% to 70% by weight. The reinforcing fibers are combined with a polyoxymethylene polymer having a relatively high melt volume flow rate. The polymer composition can also contain a coupling agent for better integrating the reinforcing fibers into the polymer matrix. In addition to low emission properties, the polymer composition of the present disclosure displays excellent mechanical properties.
−1. The composition may exhibit a dynamic coefficient of friction against a counter-material of from about 0.01 to about 0.15. The polyoxymethylene polymer compositions provide polymer articles with improved tribological properties and mechanical properties.
A tribologically modified polyoxymethylene polymer composition is disclosed. In accordance with the present disclosure, the polyoxymethylene polymer composition contains a tribological modifier, such as polytetrafluoroethylene, in combination with a stabilizer package. The stabilizer package can include a guanamine compound in combination with at least one carboxylic acid salt. The stabilizer package minimizes formaldehyde emission.
B66C 23/00 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes
A fiber reinforced polyester polymer composition is disclosed that contains at least one tribological modifier. The tribological modifier may comprise an ultra- high molecular weight silicone alone or in combination with polytetrafluoroethylene particles. The composition not only has excellent tensile properties but also can produce a low friction surface.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer in combination with a tribological modifier system. The tribological modifier system may include the combination of a fluoropolymer with a high density polyethylene, such as an oxidized high density polyethylene. The particular formulation provides a synergistic blend of properties. For instance, the polymer composition not only has an excellent surface appearance when molded into articles but has excellent low friction characteristics when tested against aluminum.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer in combination with a tribological modifier system. The tribological modifier system may include the combination of a fluoropolymer with a high density polyethylene, such as an oxidized high density polyethylene. The particular formulation provides a synergistic blend of properties. For instance, the polymer composition not only has an excellent surface appearance when molded into articles but has excellent low friction characteristics when tested against aluminum.
C08L 23/30 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bondCompositions of derivatives of such polymers modified by chemical after-treatment by oxidation
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Unprocessed synthetic resins; unprocessed artificial resins; unprocessed plastics; unprocessed polymers; unprocessed thermoplastic compounds, thermoplastic elastomer resins and thermoplastic concentrates for use in manufacturing in a wide variety of industries Semi-processed plastics; semi-processed thermoplastic polymer resins used in manufacturing; plastics in extruded form for use in manufacture of artificial and synthetic resins; plastic fibers, not for textile use
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Unprocessed synthetic resins; unprocessed artificial resins; unprocessed plastics; unprocessed polymers; unprocessed thermoplastic compounds, thermoplastic elastomer resins and thermoplastic concentrates for use in manufacturing in a wide variety of industries. Semi-processed plastics; semi-processed thermoplastic polymer resins used in manufacturing; plastics in extruded form for use in manufacture of artificial and synthetic resins; plastic fibers, not for textile use.
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
(1) Unprocessed synthetic resins; unprocessed artificial resins; unprocessed plastics; unprocessed polymers; unprocessed thermoplastic compounds, thermoplastic elastomer resins and thermoplastic concentrates for use in manufacturing in a wide variety of industries
(2) Ssemi-processed plastics; semi-processed thermoplastic polymer resins used in manufacturing; plastics in extruded form for use in manufacture of artificial and synthetic resins; plastic fibers, namely, thermoplastic concentrates in pellet form for use in manufacturing in a wide variety of industries;
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer and at least one tribological modifier. The tribological modifier may comprise an ultra-high molecular weight silicone having a kinematic viscosity of greater than 100,000 mm2s-1. When tested against itself, the composition of the present disclosure exhibits an extremely low dynamic coefficient of friction and produces no discernible noise over a very broad temperature range, such as from -20°C to 60°C.
−1. When tested against itself, the composition of the present disclosure exhibits an extremely low dynamic coefficient of friction and produces no discernible noise over a very broad temperature range, such as from −20° C. to 60° C.
The present invention relates to a molding composition, a process for manufacturing the molding composition, and molded parts obtainable from the molding composition. The molding composition can contain at least one polyoxymethylene having terminal OH-groups, at least one polyisocyanate coupling agent, at least one reinforcing fiber, and at least one formaldehyde scavenger. The moldings produced from the molding composition are distinguished by their improved mechanical properties while having low formaldehyde emissions and excellent tensile strength while having a good flex fatigue and creep performance.
The invention relates to a sweetener/sweetness enhancer, comprising at least one component selected from the group consisting of maltol and a maltol derivative; an ester; and at least one component selected from the group consisting of a plant extract and a lactone. In some embodiments, the composition includes additionally a bitter blocking agent or at least two amino acids or a carbonyl compound or sodium choloride or trehalose.
The invention relates to a sweetener/sweetness enhancer composition comprising a acesulfame-K and at least one of a compound having a balsamic note and the components thereof. In a separate embodiment, the invention is directed to a taste modifier composition comprising: at least one of a compound having a balsamic note and the components thereof, optionally in an amount ranging from 0.05 wt% to 10 wt%, and a plant extract.
The invention relates to a sweetener/sweetness enhancer composition comprising a sucralose and at least one of a compound having a balsamic note and the components thereof. In a separate embodiment, the invention is directed to a taste modifier composition comprising: at least one of a compound having a balsamic note and the components thereof, optionally in an amount ranging from 0.05 wt% to 10 wt%, and a plant extract.
The invention relates to a sweetener/sweetness enhancer composition comprising a stevia-based sweetener and at least one of a compound having a balsamic note and the components thereof. In a separate embodiment, the invention is directed to a taste modifier composition comprising: at least one of a compound having a balsamic note and the components thereof, optionally in an amount ranging from 0.05 wt% to 10 wt%, and a plant extract.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer, reinforcing fibers, and at least one tribological modifier. The tribological modifier may comprise at least one tribological modifier comprising an ultra-high molecular weight silicone having a kinematic viscosity of greater than about 100,000 mm2s-1. The composition may exhibit a dynamic coefficient of friction against a counter-material of from about 0.001 to about 0.2. The polyoxymethylene polymer compositions provide polymer articles with improved tribological properties and mechanical properties. In one embodiment, the composition contains a polyoxymethylene polymer having functional groups, a coupling agent, reinforcing fibers, and the above silicone.
The invention relates to copolymer dispersions, comprising: a copolymer of (a) a vinyl ester of an alkanoic acid having from 1 to 13 carbon atoms; (b) ethylene; (c) from 0.5 to 5 pphm of a first cross-linking co-monomer comprising an ethylenically unsaturated monomer comprising an epoxy group; and (d) from 0.55 to 2 pphm of a second functional co-monomer comprising an ethylenically unsaturated dicarboxylic acid, mono- or di-ester thereof or anhydride thereof wherein the copolymer is dispersed in an aqueous medium comprising a stabilizer. The dispersions advantageously provide surprisingly good adhesion characteristics to paper substrates.
Polymer particles containing a polyoxymethylene polymer for coating metallic substrates are described. The polymeric particles contain a polyoxymethylene polymer in combination with an adhesion promoter which may comprise an acid modified polyolefin and performance enhancing additives. The polyoxymethylene polymer and the adhesion promoter may also be combined with a thermoplastic elastomer and optionally a coupling agent. Also disclosed is a process where the polymeric particles are used to from a fluidized bed for coating metallic substrates. In one embodiment, after being coated with the polymer particles, the coated metal substrate is gas cooled followed by cooling the coated substrate in a bath containing an aqueous medium.
B05D 3/00 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
B05D 3/04 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
B01J 8/24 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles according to "fluidised-bed" technique
49.
FLUIDIZED BED PARTICLES HAVING ALKALINE RESISTANCE FOR COATING METAL SUBSTRATES
Polymer particles containing a polyoxymethylene polymer for coating metallic substrates are described. The polymeric particles contain a polyoxymethylene polymer in combination with a thermoplastic elastomer. The thermoplastic elastomer can include hard segments and soft segernets. The soft segments may contain carbonate groups, ether groups, or caprolactone groups. Also disclosed is a process where the polymeric particles are used to form a fluidized bed for coating metallic substrates. In one embodiment, after being coated with the polymer particles, the coated metal substrate is gas cooled followed by cooling the coated substrate in a bath containing an aqueous medium.
Construction materials are described that contain polyoxymethylene fibers. The polyoxymethylene fibers are treated with a sizing composition that improves dispersibility. In addition to improving dispersibility, the sizing composition improves various physical properties of the resulting hardened structural material. The sizing composition, for instance, can increase impact resistance, flexural strength, compressive strength, and/or residual strength in comparison to an identical construction material containing polyoxymethylene fibers that are untreated.
D04H 1/42 - Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
51.
PROCESS FOR THE EMULSION POLYMERIZATION OF FREE-RADICALLY POLYMERIZABLE, ETHYLENICALLY UNSATURATED MONOMERS
The present invention relates to a process for the emulsion polymerization of free- radically polymerizable, ethylenically unsaturated main monomers, and optionally further auxiliary monomers copolymerizable therewith, wherein the polymerization comprises a polymerization reaction phase starting with the first addition of an initiator or starting with the first addition of monomers, whatever is later, and ending with the completion of the addition of the initiator or the completion of the addition of total monomers, whatever is later, wherein the reaction temperature is increased during said polymerization reaction phase from a start temperature in the range of about 30°C to about 85°C to an end temperature in the range of about 60°C to about 160°C, and wherein the polymerization temperature is increased for at least 25% of the duration of said polymerization reaction phase. The present invention further relates to an aqueous (co) polymer dispersion comprising at least one (co)polymer obtained by said process, and the use of this aqueous (co)polymer dispersion.
A copolymer dispersion is described comprising a copolymer derived from a monomer mixture comprising: (a) 88.5 to 94% by weight of at least one vinyl ester of a saturated carboxylic acid; (b) 5 to 10.5% by weight of ethylene; (c) 0.5 to 5% by weight of at least one ethylenically unsaturated acid and/or an anhydride thereof and/or a salt thereof; and (d) 0.5 to 5% by weight of at least one ethylenically unsaturated monomer having at least one crosslinkable functional unit. The weight ratio of vinylester units to ethylene units in the copolymer is between 89:11 and 94:6 and the dispersion is stabilized with at least 1% by weight of an emulsifier, wherein the amounts of monomers and emulsifier refer to the total amount of monomers in the copolymer.
A coating composition comprises an emulsion copolymer of a monomer mixture comprising at least one vinyl ester, ethylene, and a stabilizing system. The stabilizing system comprises at least one polyvinyl alcohol. The monomer mixture comprises from 60 to 82 wt % of the at least one vinyl ester and from 18 to 40 wt % of the ethylene based on the total weight of monomers in the mixture. The stabilizing system comprises from 1 to 5 wt % of at least one medium molecular weight polyvinyl alcohol and at least one low molecular weight polyvinyl alcohol. The emulsion copolymer has a solids content from 50% to 60% and a viscosity ranges from 500 to 6,000 mPa·s. and a formaldehyde content of less than 10 ppm as determined by HPLC.
A vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising at least one vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol and a free radical redox polymerization initiator system comprising i-butyl hydroperoxide as an oxidizing agent and at least one of a sulfuric acid-based compound and erythorbic acid or a salt thereof as a reducing agent. The monomer mixture comprises from 70 wt % to 95 wt % of said at least one vinyl ester and from 5 wt % to 30 wt % of ethylene based on the total weight of monomers in said mixture and the copolymer has a formaldehyde content of less than 5.0 ppmw as determined by ISO-15173.
−1. The composition may exhibit a dynamic coefficient of friction against a counter-material of from about 0.01 to about 0.15. The polyoxymethylene polymer compositions provide polymer articles with improved tribological properties and mechanical properties.
The invention relates to copolymer dispersions, comprising: a copolymer of (a) a vinyl ester of an alkanoic acid having from 1 to 13 carbon atoms; (b) ethylene; (c) from 0.5 to 5 pphm of a first cross-linking co-monomer comprising an ethylenically unsaturated monomer comprising an epoxy group; and (d) from 0.55 to 2 pphm of a second functional co-monomer comprising an ethylenically unsaturated dicarboxylic acid, mono- or di-ester thereof, or anhydride thereof, wherein the copolymer is dispersed in an aqueous medium comprising a stabilizer. The dispersions advantageously provide surprisingly good adhesion characteristics to paper substrates.
C08F 218/00 - Copolymers having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid
57.
Process for producing a cyclic acetal in a heterogeneous reaction system
A process for producing a cyclic acetal is disclosed. According to the process, a formaldehyde source is combined with an aprotic compound and contacted with a heterogeneous catalyst which causes the formaldehyde source to convert into a cyclic acetal such as trioxane. The catalyst, for instance, may comprise a solid catalyst such as an ion exchange resin. In one embodiment, the process is used for converting anhydrous formaldehyde gas to trioxane. The anhydrous formaldehyde gas may be produced form an aqueous formaldehyde solution by an extractive distillation.
C08G 59/00 - Polycondensates containing more than one epoxy group per moleculeMacromolecules obtained by reaction of epoxy polycondensates with monofunctional low-molecular-weight compoundsMacromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
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 263/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of esters of unsaturated alcohols with saturated acids as defined in group on to polymers of vinyl esters with monocarboxylic acids on to polymers of vinyl acetate
C08F 2/24 - Emulsion polymerisation with the aid of emulsifying agents
C09D 151/00 - Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCoating compositions based on derivatives of such polymers
C08F 2/26 - Emulsion polymerisation with the aid of emulsifying agents anionic
C08F 2/30 - Emulsion polymerisation with the aid of emulsifying agents non-ionic
C09D 133/08 - Homopolymers or copolymers of acrylic acid esters
C09D 133/12 - Homopolymers or copolymers of methyl methacrylate
59.
Carpet coating compositions of improved stability formed from vinyl acetate/ethylene copolymer dispersions
Disclosed are aqueous carpet-coating compositions suitable for use as binders or adhesives in carpet products. Such compositions, prior to being applied to carpet substrates and cured, comprise: A) a selected type of vinyl acetate/ethylene (VAE) copolymer dispersion which has been stabilized with emulsifiers and a cellulose ether-based protective colloid, and B) at least one carbon black based filler in the form of a dispersion/slurry with a solids content between 20 and 70%. These coating compositions exhibit especially desirable initial viscosity and viscosity stability characteristics. Carpet products which utilize such coating compositions to provide binder and/or adhesive layer within the carpet are also disclosed. Such carpet products can have desirable odor-controlling and odor-absorbing properties.
The present invention relates to a process for producing cyclic acetal comprising i) preparing a liquid reaction mixture comprising a) a formaldehyde source, b) an aprotic compound and c) a catalyst; wherein the total amount of protic compounds is less than 40 wt.-%, based on the total weight of the reaction mixture; and ii) converting the formaldehyde source into cyclic acetals.
The present invention relates to a process for producing cyclic acetal comprising i) preparing a liquid reaction mixture comprising a) formaldehyde source, b) an aprotic compound and c) a catalyst; and ii) converting the formaldehyde source into cyclic acetals.
C08G 2/10 - Polymerisation of cyclic oligomers of formaldehyde
C08G 2/30 - Chemical modification by after-treatment
C08G 65/30 - Post-polymerisation treatment, e.g. recovery, purification, drying
C08G 65/06 - Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
C08G 65/16 - Cyclic ethers having four or more ring atoms
C08J 11/28 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic compounds containing nitrogen, sulfur or phosphorus
C08G 2/36 - Chemical modification by after-treatment by depolymerisation
C08J 11/16 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
62.
Cross-linkable monomers and polymers and the use thereof
C08F 28/02 - 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 bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur
C08F 228/02 - 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 bond to sulfur or by a heterocyclic ring containing sulfur by a bond to sulfur
C07C 309/12 - Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing oxygen atoms bound to the carbon skeleton containing esterified hydroxy groups bound to the carbon skeleton
C08L 41/00 - 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 bond to sulfur or by a heterocyclic ring containing sulfurCompositions of derivatives of such polymers
63.
Low formaldehyde vinyl ester/ethylene copolymer dispersions for use in adhesives
Disclosed are low-formaldehyde aqueous dispersions of vinyl ester/ethylene, e.g., vinyl acetate/ethylene (VAE), copolymers suitable for use in adhesives for applications such as tobacco or food products wherein only very low levels of formaldehyde are permitted. Such dispersions are prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol preferably having a degree of hydrolysis of at least 97 mole %, and a selected type of free radical redox polymerization initiator system. This selected redox initiator system comprises both a water-insoluble oxidizing agent and a sulfuric acid-based reducing agent. The monomer mixture which is polymerized is substantially free of co-monomers which yield free formaldehyde upon drying or curing of the dispersion and is also substantially free of ethylene oxide-containing emulsifiers. The aqueous dispersions resulting from polymerization of this monomer mixture has a solids content in weight percent and a Brookfield viscosity in millipascal-seconds such that the ratio of solids content to the natural logarithm of viscosity ranges from about 6.34 to about 8.25 wt %/ln(mPa·s). The dispersions herein also have a formaldehyde content of less than about 5.0 ppmw as determined by ISO-15173.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals used in industry, namely, polymer emulsions and powders used in the manufacture of adhesives, binders, paints, dyestuffs, coatings, primers, films, papers, non-wovens, building materials, food stuff coverings, fibre bondings
65.
Emulsion polymers with improved wet scrub resistance having one or more silicon containing compounds
Aqueous copolymer dispersions for a variety of uses, including coating compositions or binders for plasters and paints, are disclosed. The aqueous copolymer dispersions may comprise one or more silicon containing compounds, in particular hydrolyzable silane compounds without any additional reactive group.
C09D 5/00 - Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects producedFilling pastes
C08F 263/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of esters of unsaturated alcohols with saturated acids as defined in group on to polymers of vinyl esters with monocarboxylic acids on to polymers of vinyl acetate
C09D 151/00 - Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCoating compositions based on derivatives of such polymers
C09D 151/06 - Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCoating compositions based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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
The present invention relates to a molding composition, a process for the manufacturing of this molding composition, the molded parts obtainable from this molding composition as well as the use of the molding composition for the manufacturing of molded parts used in the automotive industry, for housings, latches, window winding systems, wiper systems, pulleys, sun roof systems, seat adjustments, levers, gears, claws, pivot housing, brackets, wiper arms or seat rails. The molding composition contains at least one polyoxymethylene having terminal OH-groups between 20 mmol/kg and 50 mmol/kg, at least one polyisocyante coupling agent, at least one reinforcing glass fiber that has been sized, and optionally at least one formaldehyde scavenger. The moldings produced from this molding composition are distinguished by their improved mechanical properties while having low formaldehyde emissions and excellent tensile strength while having a good flex fatigue and creep performance.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Polymer emulsions, excluding products consisting essentially of polyvinyl alcohols, used in the manufacture of adhesives, binders, paints, dyestuffs, coatings, primers, films, papers, non-wovens, building materials, food stuff coverings, fibre bondings
12-alkyl esters of methacrylic acid, styrene, and vinyl toluene in such a ratio as to produce a polymer having a Tg in the range of −20 to +65° C.; and (B) from 0.1 to 5 wt % of at least one stabilizing monomer selected from ethylenically unsaturated monocarboxylic acids or amides thereof, ethylenically unsaturated dicarboxylic acids or anhydrides or amides thereof, ethylenically unsaturated sulfonic acids, ethylenically unsaturated phosphoric acids, and ethylenically unsaturated phosphonic acids. The emulsion polymerization is conducted in the presence of 0.05 to 3 wt %, based on the total weight of monomers in the monomer mixture, of a chain transfer agent (C).
C08L 51/00 - 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
C08F 2/26 - Emulsion polymerisation with the aid of emulsifying agents anionic
C09D 151/00 - Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCoating compositions based on derivatives of such polymers
C09D 133/12 - Homopolymers or copolymers of methyl methacrylate
C08F 2/38 - Polymerisation using regulators, e.g. chain terminating agents
The present invention relates to a molding composition, a process for the manufacturing of said molding composition, molded parts obtainable therefrom as well as the use of the molding composition for the manufacturing of molded parts used in the automotive industry, for housings, latches, window winding systems, wiper systems, sun roof systems, seat adjustments, levers, gears, claws, pivot housing or wiper arms.
The present invention relates to a process for the preparation of oxymethylene polymers, the oxymethylene polymers obtained therefrom as well as their use.
C08G 14/06 - Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups of aldehydes with phenols and monomers containing hydrogen attached to nitrogen
C08G 2/00 - Addition polymers of aldehydes or cyclic oligomers thereof or of ketonesAddition copolymers thereof with less than 50 molar percent of other substances
C08G 14/00 - Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups
75.
Vinyl ester/ethylene copolymer dispersions for use in adhesive formulations
An aqueous dispersion of a vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene and a polyvinyl alcohol stabilizing system consisting essentially of (a) about 0.5 to about 3 wt. % based on the total monomer weight of a first polyvinyl alcohol having a degree of hydrolysis of at least 98 mole % and (b) about 1 to about 4 wt. % based on the total monomer weight of a second polyvinyl alcohol having a degree of hydrolysis of about 85 to about 90 mole % and a weight average molecular weight of at least 85,000 g/mol.
C08F 261/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
C09J 151/06 - Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsAdhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
An initiator for cationic polymerization comprises a salt of a protic acid as well as a protic add. The molar ratio of protic acid to salt is in the range from 1:0.01 to 1:2000. The initiator is used for example for cationic homo- or copolymerization of trioxane, and permits stable and flexible operation of the polymerization.
Oxymethylene polymers having a bimodal distribution or having a distribution of higher modality and having a targeted content of a low molecular weight fraction of from 1 to 5 percent by mass are described. Moldings of these polymers are distinguished by high low-temperature notched impact strength associated with a high modulus of elasticity.
C08G 65/34 - Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
78.
Heterogeneous vinyl acetate based copolymers as binder for paints
with the proviso that said monomer mixture (B) can also be polymerized first to obtain a copolymer (B) and subsequently monomer mixture (A) is polymerized in the presence copolymer (B) to obtain the multi-stage polymer.
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
79.
Composite polymeric articles formed from extruded sheets containing a liquid crystal polymer
A process for forming shaped three-dimensional products is described made from a composition containing at least one filler and an aromatic liquid crystal polymer. In one embodiment, the process includes forming a substrate such as a film, a sheet or a tube, through an extrusion process. Once the substrate is formed, the substrate is then heated and fed to a shaping process. The shaping process may comprise a thermal forming process or a blow molding process. In order to form the three-dimensional products, the aromatic liquid crystal polymer has a high heat of crystallization, a high melt temperature and/or a high melt viscosity.
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
C08J 5/00 - Manufacture of articles or shaped materials containing macromolecular substances
B29C 43/00 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B29C 51/00 - Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawingApparatus therefor
B29C 51/02 - Combined thermoforming and manufacture of the preform
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Chemicals used in industry, science and photography, as well
as in agriculture, horticulture and forestry; unprocessed
artificial resins; unprocessed plastics; manures; fire
extinguishing compositions; tempering and soldering
preparations; chemical substances for preserving foodstuffs;
tanning substances; adhesives used in industry. Rubber, gutta-percha, gum, asbestos, mica and goods made
from these materials and not included in other classes;
plastics in extruded form for use in manufacture; packing,
stopping and insulating materials; flexible pipes, not of
metal.
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Unprocessed artificial resins; unprocessed plastics Gum, namely, gum rubber, rubber, gutta-percha, gutta-percha, latex for industrial use, semi-processed thermoplastic substances and thermoplastic compounds in pellet form for use in manufacturing a wide variety of industries
82.
Oxymethylene polymers and process for the preparation thereof
2—O— units in the presence of an acetal of formaldehyde or a polyhydric alcohol and an initiator for cationic polymerization. The initiator may be a heteropoly acid or an acid salt thereof which is dissolved in an alkyl ester of a polybasic carboxylic acid.
C08G 16/00 - Condensation polymers of aldehydes or ketones with monomers not provided for in the groups
C08G 4/00 - Condensation polymers of aldehydes or ketones with polyalcoholsAddition polymers of heterocyclic oxygen compounds containing in the ring at least once the grouping —O—C—O—
The present invention relates to a process for the separation of vinyl acetate from a gas mixture formed by the reaction of ethylene with acetic acid and oxygen in the gas phase over catalysts comprising palladium or palladium compounds.
Plasters and renders and paints, copolymer dispersions and their use Compositions containing selected polymer dispersions, colloidal silica, fillers and pigments are described.
These can be formulated to give plasters and renders or paints which are distinguished by excellent abrasion resistance, little tendency to soiling, high water vapor permeability, good adhesion and good weathering stability. The compositions according to the invention can be processed to give plasters and renders or paints which have a nanostructured surface and which differ from conventionally produced surfaces.
A long-fiber-reinforced, thermoplastic molding compound of plastics material has outstanding impact strength and notched impact strength if it contains 30 to 90% by weight of at least one thermoplastic polyolefin, 9 to 69% by weight of at least one glass-like reinforcing fiber and 1 to 30% by weight of at least one mineral filler of an average particle size in the range from 0.1 to 2 μm. The molding compound is produced by the pultrusion method and is used in the production of domestic appliances such as washing machines or washer-dryers or electrical appliances such as coffeemakers or toasters or refrigerators or in automobile construction.
C04B 28/14 - Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
86.
Polyoxymethylene molding materials and moldings and the use thereof
3/10 minutes, measured according to ISO 1133 at 190° C. and 2.16 kg, and whose proportion of low molecular weight constituents having low molecular weights below 10 000 dalton is less than 15% by weight, based on the total mass of the polyoxymethylene, and b) a thermoplastic elastomer, are described.
The moldings produced from these molding materials are distinguished by a very high notch impact strength.
A description is given of a process of emulsion polymerization of free-radically polymerizable ethylenically unsaturated monomers selected from the group of the monoesters or diesters of ethylenically unsaturated monocarboxylic or dicarboxylic acids with alkanols, vinyl esters and/or vinylaromatics and, if desired, further monomers copolymerizable therewith, at least 60% of the total conversion in the polymerization taking place at a temperature of 100° C. to 160° C., the polymerization being performed in the presence of emulsifiers and an amount of 0% to 1% by weight, based on the total amount of the monomers used, of protective colloid.
The process can be used to obtain significantly faster conversions for comparable quality of the process products.
The dispersions obtained can be employed in a wide variety of different applications, such as binders for paints or as adhesives.
Multistage polymers predominantly stabilized by nonionic emulsifiers and derived from hard and soft monomer compositions containing vinyl esters, of which at least one monomer composition must contain an unsaturated compromisable organosilicon compound, are described.
The plastic dispersions can be used as binders in emulsion paints and finishes and impart to these excellent scrub resistance in addition to good blocking resistance.
What are described are coating compositions comprising pigments and/or fillers and multistage polyvinyl ester dispersions as binders. These binders are produced by a selected multistage process in which a polyvinyl ester dispersion is obtained in a first stage, monomers in dissolved or pure form or in the form of an emulsion are added to the reaction mixture in a second stage and then the polymerization is started again. The polyvinyl ester dispersions comprise polymerized silanes and/or epoxides or the polyvinyl ester dispersions have only a small content of protective colloids, if any. The coating compositions formulated with the multistage polyvinyl ester dispersions obtained in this way are notable for a very high weathering resistance.
What are described are polyvinyl ester dispersions which are prepared in a multistage process and have a low content of polymerized acids or acid anhydrides. They can be obtained by a multistage process in which a polyvinyl ester dispersion is obtained in a first stage, monomers in dissolved or pure form are added to the reaction mixture in a second stage and then the polymerization is started again. The polymer dispersions obtained in this way are notable for a low coagulum content and for increased tensile strengths of the films formed therefrom.
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 263/00 - Macromolecular compounds obtained by polymerising monomers on to polymers of esters of unsaturated alcohols with saturated acids as defined in group
C08F 263/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of esters of unsaturated alcohols with saturated acids as defined in group on to polymers of vinyl esters with monocarboxylic acids
C08F 263/04 - Macromolecular compounds obtained by polymerising monomers on to polymers of esters of unsaturated alcohols with saturated acids as defined in group on to polymers of vinyl esters with monocarboxylic acids on to polymers of vinyl acetate
C08L 51/00 - 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
C09D 131/02 - Homopolymers or copolymers of esters of monocarboxylic acids
C09D 143/04 - Homopolymers or copolymers of monomers containing silicon
C09D 151/00 - Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCoating compositions based on derivatives of such polymers
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
A description is given of coating compositions comprising at least one strongly basic agent to set a pH of at least 10, at least one selected vinyl ester copolymer, if desired, pigment and/or filler, and, if desired, further additives customary per se.
The coating compositions can be stored without use of additional preservatives and can be used to coat substrates of all kinds.
n, of at least 2.5, and the polymer possessing a glass transition temperature of between −30 and +15° C.
The dispersion can be used as an adhesive for nozzle application processes.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Chemicals for industry and science (except for veterinary
products and products for medical use); artificial resins;
primers (included in this class); adhesives used in
industry.
A process for isolating vinyl acetate from the gas mixture formed in the reaction of ethylene with acetic acid and oxygen in the gas phase over catalysts comprising palladium or palladium compounds, with recirculation of the acetic-acid solution obtained in the circulating gas scrubber to the first distillation column (predewatering column).
A process for preparing acetals from aldehydes and alcohols is carried out by generating a reaction/distillation zone charged with an acidic fixed bed catalyst in a distillation column, feeding the aldehyde and the alcohol to the reaction/distillatlon zone and at least partly converting them to the acetal, heating the column bottom disposed below the reaction/distillation zone in order to at least partly evaporate the bottom's mixture and to establish a defined temperature in the reaction/distillation zone, feeding an extractant into a rectifying section of the column, disposed above the reaction/distillation zone and condensing a product having more than 90% by weight of acetal at the top of the column.
C07C 41/56 - Preparation of compounds having groups by reactions producing groups by condensation of aldehydes, paraformaldehyde, or ketones
B01J 8/02 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds
