Abstract: A UV-transparent pressure sensitive adhesive comprising (a) a copolymer of (a1) from 75 to 99.8% by weight of acrylic esters and/or methacrylic esters of the formula CH2?CH(R1)(COOR2), where R1 is H or CH3 and R2 is an alkyl chain having 1 to 20 carbon atoms; (a2) from 0 to 10% by weight of acrylic acid and/or methacrylic acid of the formula CH2?CH(R1)(COOH), where R1 is H or CH3; (a3) from 0.2 to 5% by weight of olefinically unsaturated monomers which contain at least one UV-crosslinking functional group per monomer; and (a4) from 0 to 20% by weight of olefinically unsaturated monomers which contain at least one functional group per monomer; the copolymer having a weight average molecular weight of less than 300,000 g/mol and (b) from 2 to 20% by weight, based on the weight of copolymer, of a silicate filler, the silicate filler having a maximum particle diameter of 50 nm; and having a residual solvent fraction of less than 1%, based on the pressure sensitive adhesive.

Abstract: An absorbent binder coating including monoethylenically unsaturated polymer units, polyacrylate ester units that include an alkoxysilane functionality, and polyolefin glycol units and/or polyolefin oxide units, can be applied to various substrates. For example, the coating can be self-applied to an article of clothing or to a person's skin to provide absorbency. Alternatively, the coating can provide moisture absorbency, as well as adhesive properties, when incorporated into various articles including medical devices, wound dressings, laminates, absorbent garments, packaging materials, and horticultural products.

Abstract: Block copolymers are prepared by living-type or semi-living type free radical polymerization, with said copolymers having at least one random block comprised of at least one hydrophobic monomer and at least one hydrophilic monomer. The selection of hydrophobic and hydrophilic monomers in the random block is determined by the relative hydrophobicity of the monomers to impart selected solubility or dispersability in water and/or alcohols of the overall block copolymer.

Abstract: The present invention relates to adhesive and sealant compositions in non-flowable form. More particularly, the present invention relates to non-flowable adhesive and sealant compositions which are particularly useful in the threadlocking and sealing applications and which can be packaged in a convenient pocket-sized applicator dispenser.

Abstract: There is provided a process for producing a modified polyolefin resin, which comprises the step of melt kneading at least the following components (A), (B) and (C): (A) 100 parts by weight of a polyolefin resin, (B) from 0.1 to 20 parts by weight of a compound containing an amino group and an unsaturated bond, and (C) from 0.01 to 20 parts by weight of an organic peroxide.

Abstract: The invention relates to an impact additive of the core/shell type for thermoplastic polymers. This impact additive comprises a crosslinked elastomeric core based on n-alkyl acrylate and a shell made of poly(alkyl methacrylate) grafted onto said core.

Abstract: The use of macromonomers which have a glass transition temperature of at least 20° C., have at least one oligomeric and/or polymeric structural unit which is incompatible with polyacrylates, and have at least one polymerizable double bond in the form of a vinyl, acrylate and/or methacrylate unit as comonomers in the preparation of oriented polyacrylate pressure sensitive adhesives.

Abstract: This invention relates to polymeric dispersants useful in ink jet ink compositions. The graft polymers comprise monomers having electron rich functional groups, which exhibit favorable interactions with the surface of pigment particles thereby better stabilizing the pigment dispersion within the aqueous ink composition. The graft polymers also comprise hydrophobic monomers having the ability to form hydrogen bonding. The polymers of the present invention provide a dispersant that increases the smear resistance of pigmented inks, especially when used on photo or gelatin paper. The graft polymers also provide excellent chroma for printing. The present invention also relates to aqueous ink compositions which include those polymeric dispersants.

Abstract: The invention relates to polymer beads having a high content of diacyl peroxides. A prolongation of the pot life in reaction resins based on high-boiling methacrylate esters is achieved due to this high content of peroxides.

Abstract: The invention concerns a method for preparing a first generation polymer comprising a step which consists in radical polymerization of a composition containing: at least an ethylenically unsaturated monomer a free radical source, and at least a disulfide compound.

Abstract: A modified polypropylene which is a polypropylene having a value of racemic diad fraction [r] in a specific range and modified with a specific compound, e.g., (meth)acrylic acids, and their derivatives or styrene derivatives to have well-balanced properties of affinity for polypropylene-based materials, thermal stability, and high solubility in organic solvents; and a process for producing same. More particularly, the modified polypropylene which is a polypropylene having a value of racemic diad fraction [r] of 0.51 to 0.88, determined by 13C-NMR analysis, and chemically modified with a compound serving as a modifier, e.g., (meth)acrylic acids, and their derivatives or styrene derivatives; and the process for producing the modified polypropylene, wherein the polypropylene having a value of racemic diad fraction [r] in the above range is reacted with at least one type of the compound serving as the modifier in the presence of a radical initiator.

Abstract: A process for producing alkali metal polymaleimide salts by alkaline hydrolysis of maleimide polymers prepared by polymerization of maleimide monomers in the presence of a metal oxide and alcohol initiator or a base. In particular, the process produces alkali metal polymaleimide salts with particular ratios of C—N and C—C connected maleimide-derived monomer units which are dependent on the particular initiator used to synthesize the maleimide polymer. The alkali metal polymaleimide salts, which have chelating and anti-scaling properties, are useful as chelating agents and detergent builders and as such are suitable biodegradable replacements for synthetic polymers and sodium polyaspartate.

Abstract: This invention provides a method for preparing an acrylic rubber latex having a bimodal particle size distribution, comprising the step of; a) preparing seed rubber latex containing i) alkyl acrylate, ii) saturated or unsaturated C1-C9 organic acid, and iii) an acrylic multi-unsaturated monomer; b) preparing a bimodal rubber latex by adding i) alkyl acrylate and iii) an acrylic multi-unsaturated monomer to the seed rubber latex obtained in step a): and c) preparing rubber latex by grafting iv) alkyl methacrylate to the bimodal rubber latex obtained in step b). According to this invention, an acrylic rubber latex can be provided that satisfies the important factors for the improvement of impact resistance, i.e., the particle size of the impact modifier dispersed in a matrix and the distance between impact modifiers, thereby allowing the impact modifier to improve the impact resistance and weatherability of vinyl chloride resin.

Abstract: Methods and systems for modifying a polymer are disclosed herein. A solution is generally provided having a surface thereof, wherein the solution comprises a plurality of highly branched polymers. The plurality of highly branched polymers can be chemically bound to a plurality of surfactants or order to modify the surface and produce a polymeric material thereof. The surface is tailored with a plurality of functional groups that self-assemble and are deliverable to the surface of the solution, including interfaces thereof, thereby permitting a high-density assembly of functional groups to operate in concert with one another in order to generate a modified surface thereof. The polymeric material produced thereof can be reversibly adaptable to environmental conditions through a blooming of varying surface functional group to the surface of the solution.

Abstract: A process for manufacturing block polymer or copolymer from isotactic polypropylene. Polyolefins are introduced into an extruder. Free radical generator is mixed with the polyolefins to form a mixture at room temperature for free radical formation. The mixture is brought up to a temperature of between 175° C. to 220° C. Chain degradation of the polyolefins is induced by the free radical formation to form degraded polymer. Alkenically unsaturated monomers or polymer segments are mixed with the degraded polymer to form a second mixture. The temperature of the second mixture may be lowered to a temperature of between 90° C. to 150° C. The temperature of the second mixture is then adjusted to a temperature between 100° C. to 250° C. to form a novel block polymer or copolymer.

Abstract: An acrylic resin composition with excellent impact resistance, weatherability, processability and low gloss is provided. The acrylic resin composition comprises, (A) 10 to 40 parts by weight of a high molecular weight acrylic (co)polymer which is a one-step or multi-step polymer containing 72 to 100% by weight of methyl methacrylate and 0 to 28% by weight of a copolymerizable monomer, the (co)polymer having a specific viscosity of at least 0.5 (solvent: toluene, concentration: 0.4%, temperature: 30° C.), wherein a polymer layer obtained in one of the steps contains at least 72% by weight of methyl methacrylate, has a specific viscosity of at least 0.5 and makes up at least 55% by weight of the total weight of the high molecular weight acrylic (co)polymer (A); (B) 0 to 80 parts by weight of an acrylic (co)polymer containing 50 to 100% by weight of methyl methacrylate and 0 to 50% by weight of a copolymerizable monomer, the acrylic (co)polymer having a specific viscosity of less than 0.

Abstract: Acrylic polymer fine particles which comprise primary particles P of 250 nm or more in average particle diameter having a core shell structure and plastisols prepared using the same. In the fine particles, a core polymer C and a shell polymer S are copolymers of the following monomer mixtures Mc and Ms, respectively, and the weight ratio of Mc and Ms is 10/90-90/10: Mc: methyl methacrylate 20-85 mol % (meth)acrylic ester of C2-C8 aliphatic alcohol and/or aromatic alcohol 15-80 mol % other copolymerizable monomers not more than 30 mol %; , when the total amount of these monomers is 100 mol %; Ms: methyl methacrylate 20-79.5 mol % (meth)acrylic ester of C2-C8 aliphatic alcohol and/or aromatic alcohol 5-40 mol % a monomer containing carboxyl group or sulfonic acid group 0.5-10 mol % other copolymerizable monomers not more than 30 mol %.

Abstract: An impact strength modifier comprises an acrylic rubber graft copolymer (I) obtained by graft-polymerizing a polyalkyl (meth)acrylate composite rubber (A) with a vinyl monomer (B), and a compound (II) which has a sulfonic acid group or a sulfuric acid group and also has two or more benzene ring skeletons, or a salt thereof. The polyalkyl (meth)acrylate composite rubber (A) contains two or more acrylic rubber components each having a different glass transition temperature, and the respective acrylic rubber components have 20% by weight or less of a monomer having two or more unsaturated bonds in a molecule. The compound (II) preferably has two or more benzene ring skeletons, and a particle size distribution of the polyalkyl (meth)acrylate composite rubber (A) is preferably a polydisperse distribution in which two or more peaks exist within a specific range.

Abstract: A toughened cyanoacrylate adhesive composition including a cyanoacrylate monomer and an elastomeric copolymer soluble in the monomer, the copolymer being the reaction product of an olefin C2-20 and a (meth)acrylate ester. The invention further discloses novel elastomeric copolymers which do not contain additives or functional groups which can interfere with the cure rate or stability of the adhesive composition in which they are included. Benefits of the copolymers include improved toughness of the cured adhesive composition as measured by Dynamic Mechanical Analysis.

Abstract: This invention provides a composition for anchoring materials in or to concrete or masonry. The composition comprises an alkylacrylate ester monomer, an alkylacrylate ester/methacrylic acid copolymer, a free-radical catalyst and a filler.

Abstract: Chain end functionalized block copolymers having low polydispersity index are produced via controlled free radial polymerization of dithiocarbamates.

Abstract: A method for preparing a weatherable thermoplastic resin, having superior weatherability and colorability and a weatherable thermoplastic resin prepared by the method are provided. The method includes preparing a seed by adding a water-soluble initiator to either an aromatic vinyl compound or a (meth)acrylic acid alkyl ester to obtain a first compound and performing polymerization with respect to the first compound; preparing an alkyl acrylate rubber polymer by adding an alkyl acrylate monomer, a first emulsifier of pH about 3 to about 9, and an oil-soluble initiator to the seed to obtain a second compound and performing polymerization with respect to the second compound; and preparing graft copolymer by adding the aromatic vinyl compound, a vinyl cyanide compound, a second emulsifier of pH about 9 to about 13, and the oil-soluble initiator to the alkyl acrylate rubber polymer to obtain a third compound and performing graft copolymerization with respect to the third compound.

Abstract: An (meth)acryloyl group-modified ethylene-&agr;-olefin copolymer (A) which has (meth)acryloyl group as a the side-chain thereof, wherein the intrinsic viscosity [&eegr;] was 0.01 to 10 dl/g measured in decalin at a temperature of 135° C.; and a rubber composition which comprises said (meth)acryloyl group-modified ethylene-&agr;-olefin copolymer, a vulcanizing agent, and/or a crosslinking agent; in addition, a liquid curable rubber composition which comprises, component (A), reactive diluent (D), and if necessary, photopolymerization initiator (E).

Abstract: A resin which has excellent adhesion to nonpolar substrates, is nontacky, and has satisfactory solubility in aromatic or nonaromatic solvents and satisfactory compatibility with other resins. The resin is a modified polyolefin resin having a weight-average molecular weight of 15,000 to 150,000 obtained by modifying a polyolefin resin by grafting thereto (A) an unsaturated polycarboxylic acid or a derivative thereof and (B) a (meth)acrylic ester represented by a specific general formula, the contents of (A) and (B) in the modified polyolefin resin being 0.1 to 20 wt. % and 0.1 to 30 wt. %, respectively.

Abstract: Disclosed are compositions and processes for preparing polymeric materials having polymerizable units derived from at least one C8 to C30 alkyl (meth)acrylate monomer, and at least one chain branching unit. The presence of the chain branching unit suprisingly results in the polymeric composition having non-gelled polymer chains. The polymeric compositions are useful as additives for improving the melt strength of thermoplastic resins.

Abstract: Pressure sensitive adhesive compositions and pressure sensitive adhesive articles containing the adhesive compositions are disclosed. The adhesive compositions of the invention generally demonstrate favorable cohesive strength at elevated temperatures. The adhesive compositions contain an acrylic acid ester copolymer having pendant styrenic polymeric moieties mixed with a polyarylene oxide polymer. The adhesive composition may be a foam.

Abstract: An acrylic resin composition suitable for the preparation of capstock for siding panels and having excellent impact resistance, weatherability and processability and a low gloss, which comprises 30 to 100% by weight of an impact modifier having a multilayer structure and 0 to 70% by weight of a methyl methacrylate homopolymer or copolymer and whose MFI (melt flow index measured according to ASTM D-1238 at 230° C. and a load of 3.8 kg) is not more than 0.35 g/10 minutes.

Abstract: The present invention provides a coating composition for polyolefin resins, comprising a resin obtained by graft-copolymerizing at least one member selected from the group consisting of an &agr;,&bgr;-unsaturated carboxylic acid and an acid anhydride thereof with at least one member selected from the group consisting of polypropylene and a propylene-&agr;-olefin copolymer, chlorinating the graft copolymer to give an acid-modified chlorinated polyolefin, linking a (meth)acrylic ester having one hydroxyl group to the polyolefin via an ester linkage, and then graft-copolymerizing (meth)acrylic acid monomers with the polyolefin; and a process for producing the composition.

Abstract: Block copolymers are prepared by living-type or semi-living type free radical polymerization, with said copolymers having at least one random block comprised of at least one hydrophobic monomer and at least one hydrophilic monomer. The selection of hydrophobic and hydrophilic monomers in the random block is determined by the relative hydrophobicity of the monomers to impart selected solubility or dispersability in water and/or alcohols of the overall block copolymer.

Abstract: A method for making a hydrophilic and lubricious coating, the coating so made and a medical device including such coating, wherein the coating includes a hydrophilic polymeric unit layer cross-linked with a plasma deposited double bond monomer. The hydrophilic polymeric unit can include ethylene oxide with one or more primary or secondary alcohol groups or glycosaminoglycans such as hyaluronic acid, and the double bond monomer includes monomers containing at least one double bond, preferably a C═C, C═N or C═O bond, including N-trimethylsilyl-allylamine, ethylene, propylene and allyl alcohol. The invention also provides products containing such coatings and their uses in medical, pharmaceutical and cosmetic applications.

Abstract: A crosslinkable composition of a polymeric thermoplastic and/or elastomeric material which is susceptible to scorching when processed at elevated temperatures, prior to crosslinking, in the presence of a free radical initiator, is protected against such scorching by the incorporation therein of a mixture of at least one hydroquinone compound and a sulfur accelerator. This mixture may also contain at least one monomeric allylic, methacrylic, acrylic or diene type coagent. The mixture exhibits a synergistic effect resulting in improved scorch protection for peroxide cured systems when compared with the protection afforded by the components singly.

Abstract: The present invention relates to: a method of preparing a capstock layer that includes a comb copolymer; a method of preparing a multi-layered polymeric composite, at least one layer of which is a capstock layer; and a multi-layered composite formed by the method of preparing a multi-layered polymeric composite.

Abstract: The present invention relates to an artificial pigment and a method of preparing the same, specifically, to an artificial pigment with excellent dry pick resistance and to a method of preparing the same. In order to accomplish the present invention, there is provided an artificial pigment of inverted core-shell structure comprising: a) a shell of butadiene polymer including: i) a seed of butadiene polymer having glass transition temperature of −10 to 50° C.; and ii) a seed covering of butadiene polymer having a glass transition temperature of −10 to 20° C.; and b) a core of styrene polymer having a glass transition temperature of 40 to 120° C. Also provided is method of preparing artificial pigment comprising: a) preparing a shell of butadiene polymer; and b) preparing a core of styrene polymer on the inner side of said shell of step a).

Abstract: A procedure for the production of a modified acrylic sheet with high impact resistance, of the type in which a prepolymerization is done of a mix of monomers with a polymer of dissolved dienic monomers. The procedure is done in batches at low temperatures without there being a separation of the polymer of dienic monomers from the rest of the mix. The procedure facilitates obtaining a modified acrylic sheet with high impact resistance whose transmittance is kept after being subjected to an accelerated degradation, and whose impact properties are not reduced more than 50% after said accelerated degradation.

Abstract: A polyacrylate pressure sensitive adhesive, having an average molecular weight Mw (weight average) of from 100 000 to 600 000 g/mol a polydispersity of not more than 3.0 copolymerized photoinitiator units, and a process for preparing a UV-crosslinkable polyacrylate pressure sensitive adhesive having a polydispersity of not more 3.0, comprising a radical polymerization process for preparing a polymer from a monomer mixture, the monomer mixture to be polymerized comprising copolymerizable photoinitiators, the polymerization process being regulated by the presence of at least one chemical compound comprising the unit in which X is S, O or N as polymerization regulator.

Abstract: A resin which has excellent adhesion to nonpolar substrates, is nontacky, and has satisfactory solubility in aromatic or nonaromatic solvents and satisfactory compatibility with other resins. The resin is a modified polyolefin resin having a weight-average molecular weight of 15,000 to 150,000 obtained by modifying a polyolefin resin by grafting thereto (A) an unsaturated polycarboxylic acid or a derivative thereof and (B) a (meth)acrylic ester represented by a specific general formula, the contents of (A) and (B) in the modified polyolefin resin being 0.1 to 20 wt. % and 0.1 to 30 wt. %, respectively.

Abstract: A modified polypropylene which is a polypropylene having a value of racemic diad fraction [r] in a specific range and modified with a specific compound, e.g., (meth)acrylic acids, and their derivatives or styrene derivatives to have well-balanced properties of affinity for polypropylene-based materials, thermal stability, and high solubility in organic solvents; and a process for producing same. More particularly, the modified polypropylene which is a polypropylene having a value of racemic diad fraction [r] of 0.51 to 0.88, determined by 13C-NMR analysis, and chemically modified with a compound serving as a modifier, e.g., (meth)acrylic acids, and their derivatives or styrene derivatives; and the process for producing the modified polypropylene, wherein the polypropylene having a value of racemic diad fraction [r] in the above range is reacted with at least one type of the compound serving as the modifier in the presence of a radical initiator.

Abstract: A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin preferably has a weight average molecular weight of from about 20,000 to about 500,000, a polydispersity of less than about 10, and an ADT value of at least about 8. The grafted polyolefin can be defined as containing more than about 1.2% by weight of grafted monomer on a polyolefin, or as containing at least about 13 moles of graftable monomers per mole of polyolefin, or as having an asphaltene dispersancy test (ADT) value of at least about 8. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant viscosity index improver.

Abstract: The present invention relates to: a method of preparing a capstock layer that includes a comb copolymer; a method of preparing a multi-layered polymeric composite, one layer of which is a capstock layer; and a capstock layer and a multi-layered composite formed, respectively, thereby.

Abstract: A Fresnel lens base sheet is provided which is suitable for the formation of a lens layer of an ultraviolet-cured resin and has excellent impact resistance and environmental resistance. The Fresnel lens base sheet comprises a specific rubber-modified styrene resin comprising a rubber-like elastic material as dispersed particles and a copolymer of a styrene monomer with an acrylic (methacrylic) ester monomer as a continuous phase.

Abstract: A method of film fabrication is taught that uses a coating and drying apparatus to fabricate resin films suitable for optical applications. In particular, acrylic films are prepared by simultaneous application of multiple liquid layers to a moving carrier substrate. After solvent removal, the acrylic films are peeled from the sacrificial carrier substrate. Acrylic films prepared by the current invention exhibit good clarity and low birefringence.

Abstract: To provide a process for producing polymer particles which are spherical and have smooth surfaces and small contents of oil- and the solvent-soluble at the time of being compounded. Polymer particles are produced by adding 0.099 to 47 parts by mass of a crosslinking vinyl monomer to 100 parts by mass of a vinyl monomer (referred to hereinafter as the monomer) during polymerization reaction at a degree of monomer polymerization of 1 to 100% in order to polymerize the monomer in a solvent in the presence of a dispersant and a polymerization initiator to give polymer particles.

Abstract: Disclosed is a nonstyrenated polyester or vinyl ester resin that is found to be nonbrittle and to have good temperature performance, relative to known nonstyrenated polyesters or vinyl esters. Also disclosed is a nonstyrenated polyester or vinyl ester urethane acrylate resin. Methods for making nonstyrenated polyester or vinyl ester resins, including urethane acrylate resins, are provided.

Abstract: A method of preparing a curable coating and a method of curing the curable coating are disclosed. The curable composition from which the curable coating is prepared may be applied to the surface of a substrate in neat form or in aqueous medium to produce the coating. Curing of the curable coating may be accomplished by chemical generation of free radicals, by electrochemical generation of free radicals, by electron beam, by photochemical generation of free radicals, or by other electromagnetic irradiation.

Abstract: (1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an organic alkali metal compound, in the presence of a tertiary organoaluminum compound having in the molecule thereof a chemical structure represented by a formula: Al—O—Ar wherein Ar represents an aromatic ring; or (2) a methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of an organic alkali metal compound and a compound having a 1,1-diaryl-1-alkene structure, by adding the ester in the form of a mixture with the above-mentioned specific tertiary organoaluminum compound to the polymerization system.

Abstract: To provide a powder coating composition being capable of forming a coating film which has good pigment dispersibility, is excellent in weather resistance, film forming ability, appearance and stain-proofing property and, when used for PCM, is difficult to cause cracks because of its particularly excellent bending resistance at the time of bending of a metal plate. The powder coating composition comprises a powder which contains 100 parts by weight of a vinylidene fluoride copolymer having a melting point of not higher than 150° C., a crystallinity of not higher than 35% and a weight average molecular weight (Mw) of 1×104 to 5×105 and 10 to 400 parts by weight of a methyl methacrylate copolymer having a glass transition temperature of not higher than 110° C. and a weight average molecular weight of 1×104 to 5×105; an average particle size of particles constituting the powder being from 1 to 100 &mgr;m and an apparent density of the powder being from 0.2 to 1 g/ml.

Abstract: The surface energy of polymeric substrates is increased by the application or incorporation of novel amphiphilic block copolymers. The block copolymer additives comprise a linear hydrophilic polymer or oligomer and a random hyperbranched polymer or oligomer and is completely or partially terminated with lipophilic end groups. The polymeric articles or constructions which benefit from the application or incorporation of the amphiphilic block copolymers in the areas of anti-fog, dissipation of static electricity, paintability, dyeability, printability, wicking of moisture, adhesion and polymer compatibility include carpet fibers, composite fibers, agricultural films, nonwoven coverstock, exterior automotive bumper fascia, packaging, hygienic products, incompatible polymer blends, laminated articles and eyewear.

Abstract: Acrylic copolymers are provided which have polymeric portions having different polarities or glass transition temperatures, which permit easy selection of combinations of such polymeric portions having different polarities or glass transition temperatures, which increase a design freedom and which are applicable for diverse uses. Acrylic copolymers including a polymeric backbone portion prepared via copolymerization of (a) an alkyl (meth)acrylate ester containing 1-14 carbon atoms in the alkyl, (b) an olefinic polymer or copolymer terminally modified by a free-radically polymerizable unsaturated double bond and (c) a polymer terminally modified by a free-radically polymerizable unsaturated double bond and having a number average molecular weight of 2,000-30,000 and a glass transition temperature of at least 30° C.

Abstract: A resin material for denture base that is less in possibility to incorporate air bubbles into a mixed material, exhibits a proper elasticity during the elimination from an oral cavity, not causing deformation, and can impress precisely the state in the oral cavity, is provided. The resin material for denture base is of a two-liquid type, constructed by (a) a methacrylate or acrylate monomer having at least one unsaturated double bond; (b) one or two or more polymers selected from the group consisting of a methacrylate polymer, an acrylate polymer, a methacrylate/acrylate copolymer, a methacrylate/styrene copolymer, and an acrylate/styrene copolymer; and (c) a polymerization initiator, wherein a liquid A comprises the polymer (b), the monomer (a) having a solubility to the polymer (b) of 20% by weight or more, and the polymerization initiator (c); and a liquid B comprises the polymer (b) and the monomer (a) having a solubility to the polymer (b) of less than 20% by weight.

Abstract: There is provided a process for producing an acid modified polypropylene resin, which comprises the step of kneading: (1) 100 parts by weight of a polypropylene resin (A), (2) 0.1 to 20 parts by weight of an unsaturated carboxylic acid or a derivative thereof (B), (3) 0.01 to 20 parts by weight of an organic peroxide (C) having a decomposition temperature of from 50 to 120° C., at which a half-life of the organic peroxide is 1 minute, and (4) optionally, 0.01 to 20 parts by weight of an organic peroxide (D) having a decomposition temperature of from 150 to 200° C., at which a half-life of the organic peroxide is 1 minute.