Abstract: An amorphous polyolefin resin composition being excellent in the balance of the impact resistance with the surface smoothness and, further, the balance of the impact resistance with the transparency. In this amorphous polyolefin resin composition, a block copolymer (B-1) having at least one polymer block unit which is poor in the affinity with an amorphous polyolefin (A) but excellent in the affinity with a core-shell type elastomer (B-2) is combined with a core-shell type elastomer (B-2) which is excellent in the affinity with at least one polymer block of the block copolymer (B-1) and has a specific composition and a specific structure, and these components are composited in the amorphous polyolefin resin composition, thereby achieving well-balanced properties, i.e., an excellent impact resistance, an excellent surface glossiness and a high transparency.

Abstract: This invention describes grafted blend compositions, processes for their preparation and fabricated articles, especially foams therefrom. The blends exhibit enhanced melt strength, melt elongation greater than or equal to about 20 mm/s, increased upper service temperature, increased modulus, and increased hardness. The grafted blend compositions have little or no high shear viscosity increase over a corresponding polymer of the same chemical composition absent the coupling agent.

Abstract: A thermoplastic molding composition having improved mechanical properties is disclosed. The ABS composition that comprise a graft rubber polymer obtained by emulsion polymerization in the presence of specifically defined butadiene polymer latices and a rubber-free copolymer is suitable for making molded articles.

Abstract: Disclosed is a mass polymerized rubber-modified monovinylidene aromatic copolymer composition with an excellent balance of physical and mechanical properties and high intrinsic gloss, and methods for preparing such a composition.

Abstract: A polymeric composition is provided which exhibits a combination of high gloss and high environmental stress crack resistance, comprising: (a) high impact polystyrene having a gloss at 60 degrees of greater than 85% and an impact resistance of greater than 0.7 ft-lb/inch, (b) high density polyethylene which has a density greater than or equal to about 0.94 g/cm3, and which has a stress exponent less than or equal to about 1.70; and (c) a compatibilizing polymer for components (a) and (b), selected from the group consisting of diblock styrene butadiene copolymers, triblock styrene butadiene copolymers, diblock styrene isoprene copolymers, triblock styrene isoprene copolymers, and mixtures thereof, wherein the gloss at 60 degrees of the composition is greater than or equal to about 85%, and the environmental stress crack resistance measured in minutes until breakage at 1000 psi is greater than about 60.

Abstract: The invention relates to process for the manufacture of a semi-transparent thermoplastic composition of a polyphenylene ether resin and a styrenic block copolymer that is a linear di-block block copolymer, a tri-block block copolymer, a radial block copolymer, and/or a tapered block copolymer. The compositions made by the process of the invention may also contain crystal polystyrene resin and exhibit enhanced physical properties, especially ductility. The invention also relates to articles formed out of the compositions made by the process of the invention.

Abstract: A solid golf ball having good shot feel and durability as well as satisfactory flight performance and cut resistances which comprises a solid core and a cover covering the core, wherein the cover is formed from a heated mixture of: (A) an ionomer resin, (B) a thermoplastic elastomer having a carboxyl group or a thermoplastic elastomer having a terminal OH group, and (C) a block copolymer having a styrene-butadiene-styrene structure in which the polybutadiene block contains epoxy groups, or a block copolymer having styrene-isoprene-styrene structure in which the polyisoprene block contains epoxy groups, wherein the cover has a flexural modulus of from 50 to 300 MPa and a Shore D-scale hardness of from 40 to 60.

Abstract: The present invention provides a multi-layer structure golf ball having a thread rubber layer, which has good shot feel and controllability as well as satisfactory flight performance and cut resistance. The golf ball includes a thread wound core and a cover covering the thread wound core, wherein the cover is formed from a heated mixture of: (A) an ionomer resin, (B) a thermoplastic elastomer having a carboxyl group or a thermoplastic elastomer having a terminal OH group, and (C) a block copolymer having a styrene-butadiene-styrene structure in which the polybutadiene block contains epoxy groups, or a block copolymer having styrene-isoprene-styrene structure in which the polyisoprene block contains epoxy groups, the cover have a flexural modulus of from 50 to 300 MPa and a Shore D-scale hardness of from 40 to 60.

Abstract: The process for producing polymer blends by reacting at least one aminonitrile with water in the presence of thermoplastic polymers and optionally further polyamide-forming monomers comprises the following steps: (1) reacting at least one aminonitrile with water at a temperature from 90 to 400° C. and a pressure from 0.1 to 35×106 Pa to obtain a reaction mixture, (2) further reacting the reaction mixture at a temperature from 150 to 400° C.

Abstract: A process for preparing the acrylate styrene acrylonitrile (ASA) resin having an improved impact strength and a low water content is disclosed. The process comprises the step of preparing alkyl acrylate rubber polymers and the step of grafting aromatic vinyl compounds and cyanized vinyl compounds to the alkyl acrylate rubber polymers. Such emulsifiers as alkyl sulfosuccinate metal salts having 12-18 carbon atoms, alkyl sulfuric acid esters having 12-20 carbon atoms or sulfonic acid metal salts are used in the step of preparing the alkyl acrylate rubber polymers. The emulsifiers as rosinic acid metal salts or carboxylic acid metal salts having 12-20 carbon atoms are used in the grafting step.

Abstract: This invention relates to multiphase structured polymer particles comprising at least two rubber component phases (I) formed by copolymerization of monomer mixtures comprising an acrylate ester and a polyfunctional monomer, a thermoplastic resin component phase (II) formed by copolymerization of a monomer mixture comprising a methacrylate ester and other monomers, and satisfying the following conditions (1)-(5). (1) The number average molecular weight of the thermoplastic resin component forming the outermost phase is 30,000 or less. (2) The weight ratio of phase (I)/phase (II) is 30/70-80/20. (3) Of the adjacent phases (1), a specific relation holds regarding the solubility in water of the monomer mixtures forming the nth and n+1th phases. (4) A specific relation holds between the refractive index of phase (I) and the refractive index of phase (II). (5) The average particle size is 150 nm or less.

Abstract: The present invention provides a thermoplastic resin composition comprising (A) a graft copolymer containing a rubber having a small particle diameter, (B) a graft copolymer containing a rubber having a middle particle diameter, (C) an &agr;-methylstyrene and/or maleimide-based copolymer having a reduced viscosity of from 0.45 to 1.2 and (D) a styrene-based copolymer having a reduced viscosity of from 0.20 to 0.45. The thermoplastic resin composition of the present invention is low in rigidity such as tensile strength, so ductile that its molded product shows no sharp edge on rupture cross-section upon collision, has a high resistance to thermal deformation and exhibits an excellent moldability.

Abstract: The rubber-containing styrenic resin of the present invention comprises a styrenic resin matrix and a rubber component dispersed in particles. In the resin, the graft ratio of a styrenic monomer relative to the rubber component is not less than 1, the particle size of the dispersed rubber component is 0.1 to 3 &mgr;m, and the following equation (1) is satisfied: Mn=aT+b  (1) wherein Mn is the number average molecular weight of the matrix resin; T is the conversion of the styrenic monomer; a is a constant greater than 0; and b is a constant of 0 or greater. The rubber component may be a butadiene-series rubber. The particle-size distribution of the dispersed rubber component may have, for example, two peaks.

Abstract: The present invention relates to polymeric co-grafting of massing polymers and copolymers of ethylene and one or more &agr;-olefins having at least 4 carbon atoms. The co-grafts are useful tougheners for polyamides.

Abstract: The present invention is related to a bimodal rubber characterized in that the bimodal rubber is a composition of linear, and branched rubber molecules, and has a broad, yet monomodal Mw distribution and rubber modified polymers produced therefrom.

Abstract: A PMMA resin containing an impact modifier capsulated therein, said impact modifier comprising a core of a glass polymer, an intermediate layer of a rubber copolymer grafted to the core and an outer layer of a glass polymer grafted to the intermediate layer, the impact modified PMMA resin having a granular shape, the amount of the core being 5 to 20 weight %, the amount of the intermediate layer being 10 to 70 weight % and the amount of the outer layer being 25 to 85 weight %, the intermediate of the rubber copolymer being a copolymer of at least one monomer selected from the group consisting of butylacrylate and butadiene and a monomer of styrene, the outer layer of a glass polymer containing a chain transfer agent.

Abstract: The invention provides a novel chlorine-free modified polyolefin resin composition with excellent adherence to nonpolar substrates, with excellent solubility into solvent and compatibility with other resins, and with no tack after painting and drying.

Abstract: A multilayered acrylic polymer comprising an innermost layer polymer (A) formed from a C1-4 alkyl methacrylate, a C1-8 alkyl acrylate, etc., an intermediate layer polymer (B) formed from a C1-8 alkyl acrylate, an aromatic vinyl monomer, etc., and an outermost layer polymer (C) formed from a C1-4 alkyl methacrylate, a C1-8 alkyl acrylate, etc., and wherein the average value of the coating ratio, i.e. [(minimum thickness of the intermediate layer)÷(maximum thickness of the intermediate layer)]×100, is not less than 30%; and a methacrylic resin composition containing the same. This multilayered acrylic polymer can improve the falling-ball or falling-weight impact strength, resistance to impact whitening, transparency and other properties of the methacrylic resin composition.

Abstract: The present invention is directed towards a multi-layer golf ball which comprises a core, a cover layer and at least one intermediate layer disposed between the core and cover, wherein the intermediate layer comprises a glycidyl polymer and optionally, a second thermoplastic component such as polyetherester block copolymer, polyesterester block copolymer, polyetheramide block copolymer, dynamically vulcanized thermoplastic elastomer, functionalized styrene-butadiene elastomer, thermoplastic polyurethane, thermoplastic polyesters, metallocenie polymer or blends thereof and a density-modifying filler such as zinc oxide, titanium dioxide or blends thereof. Further, in a preferred embodiment, the core has a compression less than 60, the finished ball has a COR of greater than about 0.78, the intermediate layer has a specific gravity of greater than about 1.2 and the cover has a Shore D hardness of about 54 to about 72.

Abstract: The present invention is directed to blends of two grafted rubber substrates and a matrix polymer wherein one of the grafted rubber substrates uses a core/shell rubber such as a styrene/butyl acrylate rubber in order to obtain a lower contrast ratio in the blends and better colorability as well as good impact strength.

Abstract: There is provided a thermoplastic resin composition and interior or exterior parts for vehicle using thereof, which is excellent in flexibility, surface appearance, heat deformation property at heating and has low tackiness at a high temperature. The thermoplastic resin composition comprises 25 to 90 parts by weight of a (meth)acrylic ester copolymer (X), which is prepared by polymerizing 40 to 95% by weight of a (meth)acrylic ester, 0 to 40% by weight of a vinyl cyanide compound, not more than 60% by weight of an aromatic vinyl compound and 0 to 40% by weight of a monomer copolymerizable therewith, and has a glass transition temperature of not more than 20° C. and a gel content of not more than 50% by weight, 5 to 75 parts by weight of a copolymer (Y), which has a glass transition temperature or a melting point not less than 50° C.

Abstract: A derivatized blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution and then reacted with an organic compound to derivatize the blend. The sheared derivatized blend of polymers can function as a shear stable multifunctional viscosity index improver with improved low temperature properties and, in some cases, dispersancy antioxidant and anti-wear properties.

Abstract: A shrink film is provided which is superior in glossiness, mechanical strength, and rigidity, and which is also provided with a property of preventing natural shrinkage. The shrink film with excellent properties is produced by using a resin composition which is obtained by graft polymerization of copolymers of styrene and butadiene with styrene, methylmethacrylate, and butylacrylate. The thus obtained resin composition is extruded after melting and kneading, and drawn into a film in two directions, and exposed at a temperature within a temperature range for the thermal setting so as to obtain the orientation according to ASTM D1504 of the shrink film in range of 1.5 to 5.0 MPa.

Abstract: A process is disclosed for preparing bioactive, covalently fixed coatings on the surfaces of substrates, by grafting to a surface of the substrate a coating polymer which contains the following monomers in copolymerized form: (i) at least one monomer of the general formula: R—(A)a  (I), in which R is a mono- or diolefinically unsaturated organic radical having a valence a, A is a carboxyl group, a sulfuric acid group, a sulfonic acid group, a phosphoric acid group, a phosphonic acid group, a phosphorous acid group, a phenolic hydroxyl group, or a salt of one of these acid groups, and a is 1, 2 or 3; and (ii) at least one monomer which is sensitive to UV radiation.

Abstract: Thermoplastic molding compositions comprising A) a graft polymer comprising 1) an elastomeric graft core, obtainable by copolymerization of one or more C1-C10-alkyl acrylates, and a monomer with crosslinking effect, and 2) a graft shell comprising a styrene compound or a C1-C8-alkyl acrylate or methacrylate, or a mixture of the styrene compound and the C1-C8-alkyl acrylate or methacrylate, and B) a thermoplastic polymer comprising C) an elastomeric block copolymer in which all or virtually all of the olefinic double bonds have been hydrogenated, comprising at least one block A, which forms a hard phase and contains, in its polymer chain, units of a vinylaromatic monomer, and/or a block B, which forms a first elastomeric (soft) phase and contains diene monomers, and at least one elastomeric block B/A, which forms a soft phase, and contains, randomly in its polymer chain, units of both a vinylaromatic monomer and a diene, where the glass transition temperature Tg of the block A is above 25° C.

Abstract: An impact modifier for thermoplastic polyamides comprises: (A) an elastomeric olefin copolymer; and (B) a resinous olefin homopolymer or copolymer wherein at least one of (A) and (B) is maleated; and wherein the melt flow index of the resulting composition measured at 230° C. and 2.16 kg weight is at least 3 g per 10 minutes.

Abstract: The present invention relates to the use of polymers near their gelation point as additives to hydrogenated block copolymers to form thermoreversible gels. More particularly, the compositions of this invention are elastomeric and exhibit improved damping capabilities over a wide temperature range and frequency range due to the addition of a novel near-gelation polymer damping additive.

Abstract: A thermoplastic compound comprising at least one linear or branched thermoplastic polymer or copolymer, having at least one reactive or graftable site (F1), which polymer is compounded with at least one hyperbranched dendritic polyester macromolecule being composed of a monomeric or polymeric nucleus and one or more monomeric or polymeric branching or spacing chain extenders. The macromolecule is optionally chain terminated and/or functionalized, whereby terminal chain extender functions, chain termination and/or functionalization provides the macromolecule with at least one reactive or graftable site (F2) being reactive to or graftable onto said reactive or graftable site (F1). In a further aspect, the invention relates to a thermoplastic composition comprising two or more components, whereby at least one is said thermoplastic compound. In yet a further aspect, the invention relates to a thermoplastic article made of one or more thermoplastic compounds, whereby at least one is said thermoplastic compound.

Abstract: Disclosed is a method for producing a rubber-modified styrenic resin. The method includes the steps of (a) producing a rubber solution by dissolving a rubber polymer in a vinyl monomer; (b) producing a rubber composition by continuously supplying the above rubber solution in a first reactor to polymerize the rubber polymer with the vinyl monomer at a reaction temperature of 120°-145° C. to perform phase inversion of the rubber polymer, thereby producing the polymer of conversion ratio of 10-40 wt %, and realized through 50-99% of rubber particles having an average particle diameter of 0.1-0.

Abstract: A composition comprises a polyolefin, such as polyethylene, as a major constituent and poly(ethylene oxide) as a minor constituent. The composition exhibits an inverse phase morphology so that the poly(ethylene oxide) forms a continuous phase and the polyolefin forms a dispersed or discontinuous phase in the film. Desirably, the polyolefin and the poly(ethylene oxide) are grafted with a polar, vinyl monomer. The composition can be used in disposable personal hygiene articles.

Abstract: The present invention is an improved rubber-modified polymeric composition comprising: (a) a continuous matrix phase comprising an interpolymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer; and (b) from 5 to 40 weight percent, based on the total weight of said polymeric composition, of a rubber in the form of discrete rubber particles dispersed in said matrix, wherein the dispersed rubber particles comprise: (1) at least 33 weight percent based on the total rubber content, of a mass rubber particle component having a volume average particle diameter of from 0.15 to 0.40 micron; (2) from 15 to 67 weight percent based on the total rubber content, of a small-particle emulsion rubber component having a volume average diameter of from 0.05 to 0.30 micron; and (3) from 0 to 35 weight percent based on the total rubber content, of a large emulsion particle rubber component having a volume average diameter of from greater than 0.30 to 2.

Abstract: A vinyl chloride resin composition containing a graft copolymer A having an average particle diameter of at least 0.15 &mgr;m, prepared by polymerizing 50 to 90% of a solid matter of a rubber latex having a glass transition temperature of at most O° C., the rubber latex being prepared by polymerizing 50 to 100% of butadiene and/or alkyl acrylate, 0 to 40% of an aromatic vinyl monomer, 0 to 10% of a vinyl monomer and 0 to 5% of a polyfunctional monomer, with 10 to 50% of a mixture comprising 10 to 100% of an alkyl methacrylate, 0 to 90% of an aromatic vinyl monomer, 0 to 25% of a vinyl cyamide monomer and 0 to 20% of a vinyl monomer; a graft copolymer B having an average particle diameter of 0.05 to 0.

Abstract: The present invention provides (meth)acryl syrup which shows excellent storage stability as a molding material, and also provides a method of manufacturing the (meth)acryl syrup in a shorter period of time compared with the conventional method, and a molding material which permits a molded article having excellent heat-resistance, solvent-resistance, weathering resistance, and water-resistance, etc., to be manufactured. The (meth)acryl syrup is manufactured, for example, by polymerizing a monomer component including (meth)acrylic ester and a vinyl monomer having a carboxyl group in a presence of a thiol compound, and subsequently processing the reaction mixture with maleic anhydride and a basic compound. The molding material includes the (meth)acryl syrup, and may also include a thickening agent, derivatives of succinic acid, a reinforcing material, etc.

Abstract: A thermoplastic resin having such a sufficient heat shock resistance that it is unbroken by common temperature changes and also exhibiting an excellent flame resistance when applied to an insert molded article, which is obtained by blending a thermoplastic polyester resin (A) with 1-25% by weight to the total amount of the composition of an impact resistance giving agent (B), 1-50% by weight to the total amount of the composition of an inorganic filler (C), 1-25% by weight to the total amount of the composition of a flame retardant (D) and 0.1-10% by weight to the total amount of the composition of an aromatic polyvalent carboxylate (E).

Abstract: Improved adhesives useful for the manufacture of composite structures by lamination, extrusion and coextrusion processes are provided. The compositions of the invention utilize ethylene copolymers having a network structure and exhibiting unique melt elasticity characteristics in combination with modified polyolefins containing acid or acid derivative functionality and, optionally, elastomeric polymers. Composite structures wherein the adhesives are adhered to one or more substrates and, particularly composite structures comprising metal or barrier resin layers with one or a plurality of crosslinked or uncrosslinked polyethylene resin layers, are also described.

Abstract: Thermoplastic molding masses made of thermoplastic polymers obtained by mixed graft polymerization and having a glass transition temperature above 20 C., and of special rubber-elastic block copolymers, are characterized by a balanced spectrum of properties.

Abstract: Directly paintable polymer compositions contain (1) a thermoplastic olefin, (2) a maleic anhydride-grafted propylene homopolymer or random copolymer, (3) a maleic anhydride-grafted olefin polymer material, (4) a functionalized polymer that reacts with the maleic anhydride groups of the grafted polymers, and, optionally, (5) a maleic anhydride-grafted ethylene polymer. The amount of (2)+(3) or (2)+(3)+(5) is at least 16 parts but less than 27 parts per hundred parts of the thermoplastic olefin.

Abstract: The invention relates to thermoplastic molding compositions comprisingA) from 30 to 98% by weight of a graft copolymer comprisinga.sub.K) from 30 to 90% by weight of an elastomeric graft core,a.sub.S) from 10 to 70% by weight of a graft shell comprisinga.sub.S /1) from 50 to 100% by weight of a styrene compound or a C.sub.1 -C.sub.8 -alkyl acrylate or methacrylate, or a mixture thereof, anda.sub.S /2) from 0 to 50% by weight of one or more other monomers,B) from 1 to 50% by weight of a thermoplastic polymer andC) from 1 to 70% by weight of an elastomeric block copolymer prepared by anionic polymerization of the monomers with addition of a potassium compound soluble in non-polar solvents (Step 1) followed by hydrogenation of all or virtually all the olefinic double bonds of the polymer obtained in Step 1, as described in greater detail herein.

Abstract: Thermoplastic molding compositions comprise:______________________________________ A) from 20 to 96% by weight of star polymers obtainable by polymerizing vinylaromatic monomers with a branched monomer building block which contains at least two vinylaromatic functions, B) from 3 to 50% by weight of copolymers comprising vinylaromatic monomers, 1,1-diphenylethylene and, if desired, dienes, C) from 1 to 15% by weight of polyarylene ethers, D) from 0 to 5% by weight of nucleating agents, E) from 0 to 5% by weight of antioxidants, F) from 0 to 5% by weight of stabilizers, and G) from 0 to 50% by weight of fibrous or particulate fillers.

Abstract: The present invention relates to 4-methyl-1-pentene polymer compositions. Specifically, the present invention relates to adhesive compositions comprising the 4-methyl-1-pentene polymers used in bonding a 4-methyl-1-pentene polymer layer and a polar-group-containing resin layer, and laminates obtained by using such compositions. The 4-methyl-1-pentene polymer compositions as these adhesive compositions comprise a 4-methyl-1-pentene polymer (A); and a modified polyolefin resin (B) comprising a mixture of an unsaturated carboxylic acid-modified .alpha.-olefin polymer (B-1) whose .alpha.-olefin is selected from a group of propylene, butene-1 and 4-methyl-1-pentene and an unsaturated carboxylic acid-modified ethylene/.alpha.-olefin copolymer (B-2). In these compositions, an unsaturated carboxylic acid-modified 4-methyl-1-pentene polymer (A') showing a particular modification rate and a particular melt flow rate may be used in place of (A) and (B-1).

Abstract: The present invention relates to a continuous process for the production of impact resistance-modified thermoplastics. An elastomer, in particular a particulate graft polymer with a water moisture content of 1 to 50%, preferably 10 to 40%, is incorporated into a thermoplastics melt in a large volume kneader reactor. The mixing ratio of elastomer to thermoplastics melt is 4:1 to 1:4. The energy required to melt the elastomer and to evaporate the adhering water is added by heating the walls of the apparatus and via the kneading action of the installed rotating parts.

Abstract: Polymeric compositions comprising:a) at least one aromatic thermoplastic polymer or a vinylaromatic thermoplastic (co)polymer;b) at least one thermoplastic resin selected from a (co)polymer optionally modified with rubber, comprising a vinylaromatic monomer and/or a monomer deriving from (meth)acrylic acid and thermoplastic polyesters;c) a compatibilizing block polymer, with at least two blocks, which can be obtained by means of a living radicalic polymerization process.

Abstract: The present invention relates to thermoplastic graft polymer moulding compositions for high-gloss applications, which exhibit a reduced tendency of the additives to exude out of the thermoplastic composition during processing, and which exhibit reduced deposit build-up in the mould.

Abstract: A rubber latex with its particles grown through cohesion by adding 100 weight parts of (B) a rubber latex (solid), 0.1-15 weight parts (solid) of (A) an acid group-containing latex having an average particle size of 50-500 nm prepared by polymerizing a monomer mixture comprising (a), (b), (c) and (d) [wherein (a)+(b)+(c)+(d)=100 weight %]: (a) 5-25 weight % of at least one of unsaturated acids selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid and crotonic acid, (b) 20-95 weight % of at least one of alkyl methacrylates with its alkyl group 1-12 in carbon number, (c) 0-30 weight % of at least one of alkyl acrylates with its alkyl group 1-12 in carbon number, (d) 0-40 weight % of at least one selected from the group consisting of aromatic vinyls, compounds having at least two polymerizable functional groups in a molecule and vinyl cyanides, copolymerizable with the aforementioned (a), (b) and (c) is provided.

Abstract: Compositions which have substantial weatherability and impact resistance include a substantially uniform blend of (1) a physical mixture of an uncross-linked acrylonitrile/styrene copolymer and a cross-linked alkyl acrylate/graft (meth)acrylate copolymer; and (2) a filler component, preferably wood, in an amount effective as a filler in the composition. Methods for making such compositions include forming a substantially uniform physical blend of such copolymers and filler component. The compositions preferably are substantially free of cross-linked acrylonitrile/styrene copolymer.

Abstract: Impact modifiers that produce transparent, high Dynatup impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with (A) a core composed principally of rubbery polymers, such as copolymers of diolefins with vinyl aromatic monomers, such as copolymers of butadiene with styrene, (B) an intermediate stage composed principally of hard polymers, such as polymers or copolymers of vinyl aromatic monomers, and (C) a shell composed principally of vinyl aromatic copolymers that contain hydroxyl functional groups or their equivalents (e.g. styrene/hydroxyalkyl (meth)acrylate copolymers).

Abstract: Disclosed is a chemical and heat-resistant styrene-based resin composition which uses the following as the primary resin: (A) a graft copolymer of a diene rubber component and at least two compounds selected from vinyl compounds, cyanide vinyl compounds, and maleic anhydrides; (B) a graft copolymer of an alkyl acrylate rubber component and at least two compounds selected from aromatic vinyl compounds, cyanide vinyl compounds, and maleic anhydride compounds; (C) a copolymer of styrene and a cyanide vinyl compound; (D) a copolymer of styrene, .alpha.-methylstyrene, and a cyanide vinyl compound; and (E) a copolymer of styrene, a cyanide vinyl compound, and a maleimide compound. An oil component, a lubricant, a thermal stabilizer, and an antioxidant are added at suitable ratios to the above primary resin.

Abstract: Rubber-modified molding materials having improved impact strength in combination with good flow behavior can be prepared by special graft polymerization of monomers forming hard graft shells, such as styrene and acrylonitrile, in the presence of an elastomeric acrylate macromonomer copolymer dissolved or swollen in these monomers, the graft polymerization being carried out, to a conversion of more than 15% by weight of the monomers, by thermal or free radical mass or solution polymerization.

Abstract: An optical polymer composition in which polymers having the same repeating units with different polymerization ratios are mixed in an arbitrary ratio. An optical material having a desired refractive index can be attained by appropriately adjusting the mixing ratio based on weight. With such a composition, it is easy to finely adjust the difference in refractive indices between a core and a cladding forming an optical waveguide, thus an optical waveguide device can be easily fabricated.

Abstract: Molding materials (F) which are suitable for the production of shaped articles having reduced surface gloss and are based on polymers or polymer blends (P), preferably ASA polymers and/or styrene/acrylonitrile copolymers, contain a sufficient amount of a dull graft copolymer (A) admixed as dulling agent, which was prepared by one-stage or multistage graft copolymerization of monomers forming the hard shell onto an elastomeric acrylate polymer, the graft copolymerization being carried out to a conversion of more than 15% by thermal or free radical mass or solution polymerization.