Abstract: A latex emulsion may include an aqueous carrier liquid and a latex copolymer formed from reactants comprising butyl methacrylate, wherein the reactants include at least 20 wt. % butyl methacrylate, based on the total weight of ethylenically unsaturated monomers used to make the latex copolymer. A coating formed from the latex emulsion exhibits a wet adhesion to a thermoplastic polyolefin roofing membrane of greater than about 1 pound per linear inch when tested using fabric embedded peel adhesion testing per ASTM C794. The latex emulsion may be used as part of an aqueous coating composition or a roofing system including a polymeric roofing membrane.

Abstract: The present specification relates to a polymer including: a first unit represented by Formula 1; and a second unit represented by Formula 2, a coating composition including the same, and an organic light emitting device formed by using the same.

Abstract: Provided is a polymer including a temperature-responsive unit in a molecule, wherein the polymer has a refractive index difference (B?A) of 0.01 or greater but 0.2 or less between a minimum refractive index A of the polymer in a temperature range of 5 degrees C. or higher but lower than 30 degrees C. and a maximum refractive index B of the polymer in a temperature range of 30 degrees C. or higher but lower than 50 degrees C.

Abstract: A method of making a dental article, has steps of (i) providing a layer of sinter powder, (ii) providing a solidifiable binder to form a circumferential fixation zone (114) which encloses a portion of the powder layer. The method further has the step of repeating steps (i) and (ii) with each fixation zone (114) of one layer being in contact with a fixation zone (114) of an adjacent layer such that a plurality of the fixation zones (114) together form a coherent hollow sleeve (116) extending across the layers. The corresponding plurality of powder portions in combination form a contiguous batch (118) of powder captured in the sleeve. The method facilitates the manufacturing of sintered dental articles.

Abstract: Material is provided for forming a part using a manufacturing system. The material includes a plurality of discrete particles. Each of the particles includes a metal powder core encapsulated by a non-metal coating. At least the cores of the particles are adapted to be solidified together by the manufacturing system to form the part.

Abstract: A method of producing a (meth)acrylic resin composition. The method comprises a step of continuously feeding a monomer mixture comprising 80 to 100% by mass of methyl methacrylate and 20 to 0% by mass of an alkyl acrylate to a tank reactor and bulk polymerizing the monomer mixture until obtaining a polymerization conversion of 40 to 70% by mass to prepare a reaction product; continuously discharging the reaction product, and heating the reaction product to 200° C. to 270° C. with a heater, and then separating the unreacted monomer with a extruder equipped with a vent; and transferring the separated unreacted monomer entrained by an inert gas flow to reuse the separated unreacted monomer as a raw material of the monomer mixture.

Abstract: The present specification provides an organic light emitting device comprising: a first electrode, a second electrode, and organic material layers formed of one or more layers comprising a light emitting layer disposed between the first electrode and the second electrode, wherein one or more layers of the organic material layers comprise the compound of Formula 1, or a compound in which a heat-curable or photocurable functional group is introduced into this compound.

Abstract: A reinforced absorbent polymer is provided for improving mechanical properties without degrading their absorption performance. The reinforced polymer includes an absorbent polymer; and at least one fiber for reinforcement disposed in the polymer.

Abstract: A (meth)acrylic resin composition comprising not less than 99.5% by mass of (meth)acrylic resin composed of 80 to 100% by mass of a structural unit derived from methyl methacrylate and 0 to 20% by mass of a structural unit derived from acrylic acid ester, wherein a difference between YI4 and YI1 is not more than 3, in which the YI4 is a yellowness index at optical path length 200 mm of an article obtained by injection molding of the (meth)acrylic resin composition at a cylinder temperature of 280° C. and a molding cycle of 4 minutes, and the YI1 is a yellowness index at optical path length 200 mm of an article obtained by injection molding of the (meth)acrylic resin composition at a cylinder temperature of 280° C. and a molding cycle of 1 minute; and the (meth)acrylic resin composition has a melt flow rate under conditions of 230° C. and 3.8 kg load of not less than 25 g/10 min.

Abstract: The present invention relates to a polymer composition that includes a polymer having at least one polymer segment represented by the following Formula (I), With reference to Formula (I): M independently for each w is a residue of a monomer; ? is a residue of a mechanochromic compound having at least two reactive groups that are each independently bonded to one monomer residue M; w, independently for each z, is an integer of at least 1; and z is an integer of at least 2.

Abstract: A (meth)acrylic resin composition comprising 99.5% by mass or more of a (meth)acrylic resin composed of 80 to 100% by mass of a structural unit derived from methyl methacrylate and 0 to 20% by mass of a structural unit derived from an acrylic acid ester, wherein the (meth)acrylic resin composition has the rate of loss on heat of 0.5%/minute or less in a nitrogen atmosphere at 300° C., and the melt flow rate of 10 g/10 minutes or more under conditions of 230° C. and 3.8 kg load.

Abstract: As associative thickener obtainable by free radical polymerization, the preparation thereof and the use thereof in paper coating slips are described. The associative thickener is formed from (a) acid monomers selected from ethylenically unsaturated C3- to C8-carboxylic acids, (b) associative monomers of the general formula H2C?CR1—COO-(EO)n—(PO)m—R2, in which R1 is hydrogen or methyl, n is a number of at least two, m is a number from zero to 50, EO is an ethylene oxide group, PO is a propylene oxide group and R2 is a C8-C30-alkyl group or a C8-C30-alkaryl group, and (c) nonionic, copolymerizable monomers differing from a) and b), the reaction product having been reacted, after the polymerization, with initiators forming nonionic radicals.

Abstract: A process for the production of methacrylic acid or esters thereof by the base catalysed decarboxylation of at least one dicarboxylic acid selected from itaconic, citraconic or mesaconic acid or mixtures thereof in an aqueous reaction medium is described. The decarboxylation is carried out at a temperature in the range from 200° C. and up to 239° C. The methacrylic acid is isolated from the aqueous reaction medium by a purification process which does not include introducing an organic solvent to the aqueous reaction medium for solvent extraction of the methacrylic acid into an organic phase. A method of preparing polymers or copolymers of methacrylic acid or methacrylic acid esters is also described.

Abstract: A polymer is obtained from a hydroxyphenyl methacrylate monomer having an acid labile group substituted thereon. A positive resist composition comprising the polymer as a base resin has a very high contrast of alkaline dissolution rate before and after exposure, a high resolution, a good profile and minimal line edge roughness of a pattern after exposure, a retarded acid diffusion rate, and good etching resistance.

Abstract: A composition for imprints comprising a polymerizable monomer, a photopolymerization initiator, and a polymer having a functional group with at least one of a fluorine atom or a silicon atom and having a polymerizable functional group, wherein the polymer has a weight-average molecular weight of at least 2000 and the amount of the polymer is from 0.01 to 20% by mass relative to the polymerizable monomer, is excellent in patternability and mold releasability, capable of forming good patterns and free from a problem of mold contamination.

Abstract: Provided is a toner for developing an electrostatic image. The toner has excellent heat-resistant storage properties and crush resistance while having sufficient low temperature fixability. The toner for developing an electrostatic image includes toner particles that contain at least a binder resin. The binder resin contains a polymer prepared by polymerizing a polymerizable monomer represented by a following general formula (1). In the general formula (1), R1 and R2 each independently represent an aliphatic hydrocarbon group having 1 to 60 carbon atoms, an aliphatic group wherein some of carbon atoms of the aliphatic hydrocarbon group are substituted with an oxygen atom, or an aromatic hydrocarbon group optionally having the aliphatic hydrocarbon group or the aliphatic group as a substituent; and R3 and R4 each independently represent a hydrogen atom or an aliphatic hydrocarbon group.

Abstract: Crosslinked pressure-sensitive adhesive comprising at least one base polymer component obtainable by free-radical copolymerization of the following monomers: a) linear acrylic esters having 2 to 10 C atoms in the alkyl radical, b) branched, non-cyclic acrylic esters having a glass transition temperature Tg (based on the DSC measurement to DIN 53765) of not more than ?20° C., c) 8% to 15% by weight of acrylic acid, d) optionally up to 10% by weight of further copolymerizable monomers, characterized in that the ratio of the linear acrylic esters to the branched acrylic esters is in the range from 1:6 to 10:1 mass fractions.

Abstract: A sheet is made of ACM. A backbone monomer of ACM is a mixture of ethyl acrylate and butyl acrylate. The weight ratio of butyl acrylate to ethyl acrylate is 0.8 to 1.3. A crosslinking monomer of ACM has a carboxyl group.

Abstract: An acrylic resin that can have excellent transparency, flowability and scratch-resistance property is prepared by polymerizing a monomer mixture comprising about 10 to about 25% by weight of (meth)acrylic acid alkyl ester monomer, about 50 to about 80% by weight of aromatic vinyl compound, and about 10 to about 25% by weight of vinyl cyanide compound.

Abstract: The invention relates to a biocompatible, non-biodegradable, and non-toxic polymer of formula (I), comprising of three monomeric units, selected from 1-Vinylpyrrolidne (VP), N-Isopropylactylamide (NIPAM), and ester of Maleic anhydride and Polyethylene glycol (MPEG), cross-linked with a bi-functional vinyl derivative, of high purity and substantially free of respective toxic monomeric contaminants, and a process for preparation thereof. The invention further relates to nanoparticulate pharmaceutical compositions of poorly water-soluble drugs or compounds comprising the polymer of the invention, which are safe, less-toxic and convenient for bedside administration to patients in need thereof. Furthermore, the invention relates to a highly selective method for preparation of nanoparticulate pharmaceutical compositions of poorly water-soluble drugs or compounds.

Abstract: The invention provides a process for manufacturing a polymeric material having a compositional gradient, comprising: forming a mixture comprising a first photopolymerizable polymer precursor and a second photopolymerizable precursor, and subjecting said mixture to an intensity gradient of electromagnetic radiation, wherein said first precursor has a greater reactivity ratio than said second precursor, and/or said first precursor is mono-functional and said second precursor is di-functional, and/or said first precursor is less inhibited by oxygen than said second precursor.

Abstract: This invention relates to a method for preparing a star-shaped polycarboxylate superplasticizer by the first esterification step with polyol and (meth)acrylic acid as main reactants and the second polymerization step. In the first step, the star-shaped polymerizable active ends were synthesized by esterification between polyol and (meth)acrylic acid in the presence of catalyst. In the second step, the final star-shaped polycarboxylate superplasticizer was prepared by radical polymerization among the product obtained in first step, unsaturated polyoxyethylene ethers, molecular weight regulator and unsaturated carboxylic acid in the presence of initiator. The production process of this invention exhibits some characteristics including simple, easily controllable, high polymerization degree, low cost and pollution free. The star-shaped molecular structure of polycarboxylate superplasticizer can be achieved through synthesizing active “core” by esterification and “arm” by radical polymerization.

Abstract: In a multi-stage emulsion polymerization process, a first monomer composition comprising from about 60 weight percent to about 95 weight percent of at least one vinyl ester, and from about 5 weight percent to about 40 weight percent ethylene is polymerized in a first stage under ethylene pressure to produce a first stage product having a Tg of less than 20° C. Then, in a second stage, a second monomer composition comprising at least 95 weight percent of a meth(acrylic)ester or a mixture of at least two different (meth)acrylic esters is polymerized in the presence of said first stage product, wherein the (meth)acrylic ester(s) is selected such that the polymer produced by said second monomer composition has a Tg of 5 to 90° C.

Abstract: The present invention relates to controlled radical polymerization (CRP) initiators that include at least one radically transferable group. The CRP initiators include at least one of the following, (a) a spirooxazine compound represented by the following Formula (I), and (b) an indenonaphthopyran represented by the following Formula (II), One or more of R1, R2, R3, R4, R5, and R6 of the spirooxazine, and one or more of R7, R8, R9, R10, B, and B? independently include the radically transferable group. The present invention also relates to polymers, such as mechanochromic polymers, that are prepared from such CRP initiators, polymer compositions that include such polymers, and mechanochromic articles that include such polymer compositions.

Abstract: The present invention provides a novel continuous polymerization apparatus which is able to efficiently produce a polymer composition suitable for obtaining a resin composition with high quality. In a continuous polymerization apparatus, at least, a first reactor of a complete mixing type and a second reactor of a complete mixing type (10, 20) are used. Each of the reactors (10, 20) is provided with a supply port (11a, 21a), an effluent port (11b, 21b), and a temperature detecting means (T) for detecting a temperature in the reactor, wherein the supply port (11a) of the first reactor (10) is connected to the supply sources (1, 3) of a raw material monomer and a polymerization initiator, and the effluent port (11b) of the first reactor is connected through a connection line (15) provided with a cooling means (16) to the supply port (21a) of the second reactor (20).

Abstract: A polarizing plate and an optical member, the polarizing plate including an adhesive layer, the adhesive layer being prepared from an adhesive composition including a (meth)acrylic copolymer, a crosslinking agent, and a tackifier, the tackifier including an acrylic modified petroleum resin represented by Formula 1: R?—CO—O—R??[Formula 1] wherein R? is a petroleum resin and R is a C1-C20 alkyl group or a C6-C50 aryl group.

Abstract: A premixed composition is formed from modified polyacrylate polymer, silicone emulsion, one or more amine compounds, and silane, that cures rapidly to form a composition that can be used as a grout or coating. The premixed composition includes a latex resin including an acrylic-based polymer, a silicone emulsion, one or more amine compounds, and a silane, and optionally various fillers, pigments, and adjuvants. These components in the proper proportions form a stable viscous suspension that can be floated into tile joints, and cleaned from an adjacent tile surface. The composition rapidly cures to form a hard mass that is resistant to abrasion, in both dry and wet conditions, is color consistent, and is resistant to staining.

Abstract: A polymer is prepared from an adamantane methacrylate monomer whose alcoholic hydroxyl group is protected with an alicyclic-containing tertiary alkyl group. A photoresist composition comprising the polymer displays a high sensitivity and a high dissolution contrast during both alkaline development and organic solvent development.

Abstract: An optical film contains an acrylic resin, in which at least one of a modulus of elongation on a machine direction and a modulus of elongation on a direction vertical to the machine direction is less than 2.3×109 N/m2 and an in-plane retardation value Re (nm) of the optical film represented by the following formula (i) satisfies the following formula (ia): Re=(nx?ny)×d??Formula (i) ?Re=Re(10)?Re(0)?10??Formula (ia) wherein, in the formulae, nx represents a refractive index in an in-plane slow axis direction of the optical film, ny represents a refractive index in an in-plane fast axis direction of the optical film, d represents a thickness (nm) of the optical film, Re(10) represents a retardation value when the optical film is stretched 10%, and Re(0) represents a retardation value in an unstretched state of the optical film.

Abstract: The invention provides a method for inhibiting bacterial attachment to a surface, the method comprising forming the surface from a polymer, or applying a polymer to the surface, wherein the polymer is a homopolymer formed from a (meth) acrylate or (meth) acrylamide monomer or a copolymer formed from one or more (meth) acrylate or (meth) acrylamide monomers, wherein the (meth) acrylate or (meth) acrylamide monomers are of formula (I) or (II): [H2C?CR?—C(?O)—O—]nR??(I) [H2C?CR?—C(?O)—NH—]nR??(II) wherein n is 1, 2 or 3, R? is independently H or CH3, R is an organic group having a total of from 2 to 24 carbon atoms, wherein the organic group includes an aliphatic or aromatic hydrocarbon moiety and wherein the organic group does not include any hydroxyl groups.

Abstract: To provide a photoalignable material that can yield a photoalignable film having a high optical uniformity and no alignment defect, and allows photoalignment with exposure in a short period of time. A photoalignable polymer composition containing a specific photoalignable polymer having a silicone group or a fluorine-substituted alkyl group, and a photoalignable group, and a specific non-photoalignable polymer is manufactured, and the photoalignable film is manufactured by applying the polymer composition onto a base material or the like, drying an applied surface thereon, and irradiating the applied surface with light.

Abstract: The invention relates to a process for preparing a (meth)acrylate copolymer containing tertiary amino groups by free-radical polymerization in solution from a monomer mixture selected from a) 30 to 70% by weight of a C1-C4-alkyl ester of acrylic acid or methacrylic acid and b) 70 to 30% by weight of an alkyl ester of acrylic acid or methacrylic acid with a tertiary amino group in the alkyl radical and c) 0 to 10% of further copolymerizable vinyl monomers, whereby one or more polymerization initiators, optionally one or more molecular weight regulators and one or more solvents or of a solvent mixture are added to the monomer mixture to give a polymerization mixture, which is polymerized at temperatures from 30 to 120° C.

Abstract: [Task to Be Achieved] To provide a chemically amplified type positive copolymer for semiconductor lithography, which has eliminated the problems of prior art, has a high development contrast, and has excellent resolution in fine-pattern formation; a composition for semiconductor lithography which contains the copolymer; and a process for producing the copolymer. [Means for Achievement] The copolymer for semiconductor lithography according to the present invention is a copolymer which has at least (A) a repeating unit having a structure which has an alkali-soluble group protected by an acid-labile, dissolution-suppressing group, (B) a repeating group having a lactone structure and (C) a repeating group having an alcoholic hydroxyl group and which is characterized by having an acid value of 0.01 mmol/g or less as determined by dissolving the copolymer in a solvent and subjecting the solution to neutralization titration with a solution of an alkali metal hydroxide using Bromothymol Blue as an indicator.

Abstract: A water-dispersible, cyclocarbonate-functionalized vinyl copolymer binder, a process for the preparation of the binder, an aqueous dispersion containing the binder, a system comprising the binder, water and an (amine) curing agent and the use of the binder for the production of a hardened coating are proposed. It was surprisingly found that this binder, in which the emulsifier groups according to the invention are incorporated in the polymer chain, gives stable aqueous dispersions having a solids content of up to a 30% by weight.

Abstract: The object of the present invention is to provide a silicone-based copolymer which has excellent long-term antifouling property even in a dry-wet alternate portion of a ship and the like or a portion thereof near the surface of water, is excellent also in mechanical strength and recoatability and exhibits high antifouling performance even if an antifouling agent is not added, and an antifouling coating composition containing the copolymer.

Abstract: Copolymers are manufactured to include a zwitterionic monomer (e.g., methacryloyloxyethyl phosphorylcholine monomer), a dihydroxyphenyl derivatized monomer, and optionally one or more additional monomers. The dihydroxyphenyl derivatized monomer gives the copolymers excellent adhesion properties. Optional monomers include a cationic amino monomer, a hydrocarbon monomer, and/or a hydrophilic monomer. The copolymers are biocompatible and can be used with medical devices.

Abstract: The invention relates to a process for preparing a (meth)acrylate copolymer containing quaternary ammonium groups from a monomer mixture selected from: (a) 80 to 99% by weight of a C1-C4-alkyl ester of acrylic acid or methacrylic acid; and (b) 20 to 1% by weight of an alkyl ester of acrylic acid or methacrylic acid with a quaternary ammonium group in the alkyl radical; and (c) 0 to 10% of further copolymerizable vinyl monomers whereby one or more polymerization initiators, optionally one or more molecular weight regulators and one or more solvents or of a solvent mixture are added to the monomer mixture to give a polymerization mixture, which is polymerized at temperatures from 30 to 120 C over a period of 2 to 24 hours, where the polymerization mixture is polymerized to a polymerization syrup with a conversion of the monomers to the copolymer of at least 99% by weight, where the polymerization syrup is subsequently degassed by distillation or by extrusion and the degassed polymerization syrup is further comm

Abstract: A compound represented by the formula (I): wherein R1 represents a hydrogen atom etc., R2 and R3 each independently represent a hydrogen atom etc., R4 represents a C1-C8 divalent hydrocarbon group, R5 represents a single bond etc., and R6 represents an unsubstituted or substituted C6-C20 aromatic hydrocarbon group, a polymer comprising a structural unit derived from the compound represented by the formula (I) and a chemically amplified positive resist composition comprising the polymer, at least one acid generator and at least one solvent.

Abstract: Presently disclosed are processes for making acrylic acid and methacrylic acid along with their respective esters, from alkylene glycols such as ethylene glycol and propylene glycol. In particular, biobased acrylic acid and acrylic acid esters, methacrylic acid and methacrylic acid esters can be made starting with bioderived glycols from the hydrogenolysis of glycerol, sorbitol and the like.

Abstract: An adhesion improver for amine curing epoxy resin paint which, when added in a small amount to amine curing epoxy resin paint, is capable of preventing the inhibition of adhesion caused by amine blushing and of giving good interlayer adhesion is provided. This adhesion improver is a composition which contains a polymer obtained by the polymerization of (A) acrylic acid ester and/or methacrylic acid ester which has a formula as follows: wherein R1 denotes a hydrogen atom or a methyl group, and R2 denotes a branched alkyl group having 3 to 18 carbon atoms, and (B) acrylic acid ester other than (A) above and/or methacrylic acid ester other than (A) above and/or vinyl ether.

Abstract: A polymer comprises the polymerized product of monomers comprising a nitrogen-containing monomer comprising formula (Ia), formula (Ib), or a combination of formulas (Ia) and (Ib), and an acid-deprotectable monomer having the formula (II): wherein a is 0 or 1, each Ra is independently H, F, C1-10 alkyl, or C1-10 fluoroalkyl, L1 is a straight chain or branched C1-20 alkylene group, or a monocyclic, polycyclic, or fused polycyclic C3-20 cycloalkylene group, each Rb is independently H, C1-10 alkyl, C3-20 cycloalkyl, C3-20 heterocycloalkyl, an aliphatic C5-20 oxycarbonyl, or a C1-30 acyl group optionally including a heteroatom substituent group, where each Rb is separate or at least one Rb is attached to an adjacent Rb; LN is a nitrogen-containing monocyclic, polycyclic, or fused polycyclic C3-20 heterocycloalkylene group, and X is H, C1-10 alkyl, aliphatic C5-20 oxycarbonyl, or a C1-30 acyl group optionally including a heteroatom substituent group; and each Rc is independently C1-10 alkyl, C3-20 cycloalkyl, o

Abstract: Biocompatible terpolymers are manufactured to include a zwitterionic monomer, an alkoxy acrylate monomer, and a hydrophobic monomer.

Abstract: The use is described of polymers which contain, in copolymerized form, an ?-olefin, a vinyl ester and an ester of an ?,?-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuel oils. En addition, the fuel oils and lubricants additized with these polymers; and also additive packages comprising such polymers are described.

Abstract: This invention relates to a copolymer composition comprising vinyl ester of 2-ethyl hexanoic acid (VEHA), and particularly to pressure-sensitive adhesive compositions based on VEHA reacted with (meth)acrylate monomers. The present adhesive compositions provide a film with high cohesion and adhesion values, and more particularly to pressure-sensitive adhesive compositions based on VEHA reacted with (meth)acrylate monomers and VeoVa 10. The present adhesive compositions provide a film with high cohesion and adhesion values with Peel on Teflon of at least 2 N/inch.

Abstract: A method to provide acid etch resistance to contacting a calcareous substrate with a copolymer prepared from fluorinated methacrylate, short chain branched (meth)acrylate, and (meth)acrylic acid salt and a treated substrate.

Abstract: A process for preparing a randomly branched copolymer, by reacting the components (a) 10-98.9 mol % of at least one acrylic ester of a straight-chain, branched or cyclic C1-C22-alkyl monoalcohol, (b) 0.

Abstract: The present invention is directed to curable film-forming compositions comprising a film-forming resin and a crosslinking agent. The film-forming resin contains a polymer having functional aromatic groups derived from functional aromatic acids. The present invention further provides multi-component composite coating compositions comprising a first film-forming composition applied to a substrate to form a primer or base coat, and a second film-forming composition applied on top of the primer or base coat to form a top coat, the top coat comprising the composition described above. Coating compositions prepared from the curable compositions of the present invention demonstrate superior gloss and acid etch resistance properties, making them ideally suited for automotive applications.

Abstract: The invention relates to an acrylic copolymer additive useful as a process aid in highly filled polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) composites. The acrylic additive is especially useful in highly filled PVC flooring tiles, rolled flooring, pipe and siding. The acrylic copolymer additive contains from 50 to 79 weight percent of methyl methacrylate monomer units, and has a Tg of less than 90° C.

Abstract: The present invention relates to cement dispersant that is a copolymerization product of a first monomer (A) comprising a carboxylic acid, a second monomer (B) comprising an alkoxylated allyl alcohol sulfate, and, optionally, a third monomer (C) comprising an alkoxylated allyl alcohol. The cement dispersant according to the invention provides improved slump life properties and water reduction properties in cement admixtures.

Abstract: Provided herein is a (meth)acrylic resin that has less impurities and is less likely to deteriorate in transparency or turn yellow during molding processing, which is not obtainable by conventional suspension polymerization. The invention is a method for producing a methyl methacrylate polymer, comprising suspension polymerization of 30 to 100 wt % of methyl methacrylate and 70 to 0 wt % of a monomer copolymerizable therewith to produce a methyl methacrylate polymer, wherein the polymerization is initiated in the presence of 350 ppm or less of a suspension stabilizer relative to the monomer(s) and then a suspension stabilizer is added when a polymerization conversion ratio reaches 20 to 90%.