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: 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: Herein are disclosed a curable resin composition for overcoat of flexible circuit which comprises a hydrogenated polybutadiene polyol with a number-average molecular weight of 1,000-8000 and having 2-10 hydroxyl groups per molecule (Polyol A), and a polybutadiene polyblock isocyanate (Isocyanate X), and other similar curable resin compositions, which can be an overcaoting agent which can give a coat film involving no such trouble that the coat film gets overhardened and the curling is increased.

Abstract: Halogen-free thermoplastic blends of a polar rubber, ethylene vinyl acetate and a polyolefin are provided which are flexible and are particularly useful in replacing polyvinyl chloride for production of various products.

Abstract: Modified SAN resin blend compositions that have good clarity and improved tensile properties compared to unmodified SAN resins are described. The compositions are blends of SAN resins and certain modifiers which 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: 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 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: In a process for preparing thermoplastic molding compositions by

Abstract: Thermoplastic materials containing A) 5 to 80 parts by weight of a thermoplastic co- or terpolymer made from the monomers styrene, &agr;-methylstyrene, methyl methacrylate, acrylonitrile with an average molecular weight ({overscore (M)}w) of 70,000 to 119,000, B) 1 to 30 parts by weight of a thermoplastic copolymer made from 60 to 95% by weight of styrene and/or &agr;-methylstyrene and 40 to 5% by weight of acrylonitrile with an average molecular weight ({overscore (M)}w) of 25,000 to 49,500, C) 0.1 to 10 parts by weight of a thermoplastic co- or terpolymer made from the monomers styrene, &agr;-methylstyrene, methyl methacrylate, acrylonitrile with an average molecular weight ({overscore (M)}w) of 1,500 to 6,000 and D) 0.5 to 50 parts by weight of a particulate rafted rubber with a glass transition temperature ≦10° C. and an average particle diameter (d50) of 0.05 to 0.

Abstract: A thermoplastic molding composition comprising a grafted rubber and a copolymeric matrix is disclosed. The composition is characterized in that its grafted rubber includes a substrate, a first grafted phase and a subsequent grafted phase which are sequentially grafted to said substrate. The substrate which contains a crosslinked elastomer is grafted with a first grafted phase and with a subsequent grafted phase, both phases containing copolymers of at least one vinylaromatic monomer and at least one member selected from the group consisting of (meth)acrylonitrile and alkyl (meth)acrylate. The relative ratios of the monomers making up the copolymerized phases differ one from the other. The grafted rubber is present in particulate form having a weight average particle size of about 0.1 to 1.0 microns. The composition features improved impact strength and reduced opacity.

Abstract: Core/shell particles comprising a core comprising an elastomer having a TG value of <0° C., onto which a shell of a crosslinked copolymer is grafted, where the proportion of the crosslinking component in the copolymer of the shell is from 5 to 90% by weight, based on the total amount of the comonomers of the shell copolymer, are suitable as toughening agents for epoxy resins, with which they have good compatibility.

Abstract: A vinyl chloride resin composition having a greatly improved processability without lowering the transparency wherein the gelation property of a vinyl chloride resin is improved with greatly decreased generation of ungelled substance; which comprises a vinyl chloride resin and 0.

Abstract: Repulpable PSA compositions and constructions that exhibit high adhesive performance on a wide range of substrates are provided. In one embodiment, a PSA composition comprises a blend of two emulsion acrylic copolymers. The first type is a repulpable, emulsion acrylic copolymer that passes TAPPI UM 213. Preferably, the copolymer is prepared by sequential polymerization. The second type of copolymer is a non-repulpable, gpp or removable, repositionable, emulsion acrylic copolymer, also preferably prepared by sequential polymerization. The PSA compositions are inherently tacky and can be used in labels and tapes. In addition, they can be added to other PSAs as external tackifiers.

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: A polystyrene-based resin composition, comprising (A) a styrene-based resin with a mainly syndiotactic configuration, (B) a polyolefin, and (C) rubber polymer particles as main components, exhibits excellent heat resistance and impact resistance.

Abstract: A composition amenable to injection molding and extrusion comprises a syndiotactic styrene resin, a thermoplastic resin such as a polyolefin and an inorganic filler optionally contains a rubber.

Abstract: A polystyrene-based resin composition containing a styrene-based resin with mainly syndiotactic configuration, a polyamide, and a rubber polymer as main components.

Abstract: According to the present invention there is provided a cyanoacrylate adhesive composition having high shear bond strength, peeling bond strength and impact bond strength and superior particularly in hot-cold cycle resistance and heat resistance. The cyanoacrylate adhesive composition contains (a) a cyanoacrylate monomer, (b) an elastomer miscible or compatible with the cyanoacrylate monomer, and (c) a core-shell polymer having a core of a rubbery polymer and a shell of a glassy polymer, the core-shell polymer being compatible but not miscible with the cyanoacrylate monomer.

Abstract: A thermoplastic composition comprising (a) a polyalkyl acrylate rubber characterized that it contains no grafted phase, and (b) a poly (vinyl aromatic-co-nitrile)-grafted polyalkyl acrylate rubber, and (c) ungrafted poly (vinyl aromatic-co-nitrile) having a number average molecular weight of about 20,000 to 100,000 g/mole is disclosed. The composition which contains about 15 to 35% by weight of polyalkyl acrylate rubber having a weight average particle size of about 0.02 to 1 microns and wherein weight ratio between (a) to the total (a)+(b) is 0.1 to 0.5, is characterized in having improved physical and mechanical properties.

Abstract: A molding material contains, based on the sum of the components A and B, and, if required, C, D and/or E,A: 1-99% by weight of a particulate microemulsion polymer having a glass transition temperature below 0.degree. C. and a median particle size of less than 50 nm,B: 1-99% by weight of a semicrystalline polymer B, in particular selected from at least one polymer from semicrystalline polyamides, partly aromatic copolyamides, polyolefins, ionomers, polyesters, polyetherketones, polyoxyalkylenes and polyarylene sulfides,C: 0-50% by weight of a polymer selected from a particulate graft copolymer having a median particle size of from 60 to 10,000 nm, a thermoplastic polyurethane, a thermoplastic elastomer and an acrylate, diene, EP, EPDM or silicone rubber,D: 0-50% by weight of polycarbonates andE: 0-50% by weight of fibrous or particulate fillers or of a mixture thereof.

Abstract: There is a need for halogen-free polymeric compositions which offer increased heat and ultraviolet light resistance for utilization in automotive interiors. For instance, it is particularly critical for polymers which are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance.

Abstract: A thermoplastic resin composition which has low rigidity such as bending strength, bending modulus and tensile strength, high impact resistance, and further low stress and large energy absorption at the time of impact, high heat deformation resistance and excellent moldability and comprises 5 to 65 by weight of the copolymer (I) having Tg (glass transition temperature) of not more than 20.degree. C., 20 to 80 parts by weight of the maleimide copolymer (II) and 15 to 75 part by weight of the graft copolymer (III) having a graft ratio of 10 to 70% so that the total amount of the copolymers (I), (II) and (III) becomes 100 parts by weight, can be obtained.

Abstract: A lubricant for a thermoplastic resin such as poly(vinyl chloride) resin, comprising (co)polymer (A) whose weight-average molecular weight is in the range of 10,000 to 10,000,000, produced by polymerization of (meth)acrylate with a (cyclo)alkyl group having 6 to 24 of carbon atoms and (co)polymer (B) produced by polymerization of (meth)acrylate with an alkyl group having 1 to 4 of carbon atoms whose glass transition temperature is not lower than 15.degree. C.

Abstract: The instant composition is a sealable and peelable polymer composition consisting essentially of a first ethylene copolymer grafted with a vinyl monomer and a second ethylene copolymer selected from ethylene/methylacrylate copolymers, ethylene/ethylacrylate copolymers and ethylene/butylacrylate copolymers.

Abstract: Particulate elastomeric graft polymers which are suitable for improving the quality of macromolecular base materials B consist ofa) a grafting core comprising an elastomeric polymer P.sub.K, the particles having a mean particle diameter of from 1 to 150 .mu.m, andb) one or more shells, the outer shell S.sub.a consisting of a polymer P.sub.a which is compatible or partly compatible with the base material B.

Abstract: A resin composition, excellent in a physical property balance between chemical resistance and impact strength, obtained by mixing at least one graft copolymer selected from the group consisting of a graft copolymer in which a copolymer rubber of an alkyl acrylate and a conjugated diene is used, a graft copolymer in which a rubber prepared by seed rubber polymerizing an alkyl acrylate with a conjugated diene rubber is used and a graft copolymer in which a rubber prepared by seed rubber polymerizing an alkyl acrylate with a polyorganosiloxane rubber is used, with a graft copolymer in which a conjugated diene rubber is used, and optionally with a rigid thermoplastic resin.

Abstract: In the preparation of a rubber-modified molding material, in a first stage, a first mixture (A) contains at least one alkyl acrylate or methacrylate (a) of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2 is alkyl of 1 to 32 carbon atoms, a compound (b) of the formula (II) ##STR2## where R.sup.3 is hydrogen or methyl, R.sup.4 is hydrogen or alkyl of 1 to 8 carbon atoms, R.sup.5 is hydrogen or methyl and R.sup.6 is hydrogen or alkyl of 1 to 10 carbon atoms, preferably hydrogen, and, if required, a first monomer (c) or a plurality thereof is polymerized with free radicals to give a rubber (B),in a second stage, the resulting rubber (B) is mixed with a second monomer (d) or with a plurality thereof, preferably dissolved or swollen therein, to form a second mixture (C), andin a third stage, the second mixture (C) formed by mixing is polymerized with free radicals to give the rubber-modified molding material (D).

Abstract: Compositions which have substantial weatherability and impact resistance comprise a substantially uniform physical blend of an uncross-linked acrylonitrile/styrene copolymer and a cross-linked alkyl acrylate/graft (meth)acrylate copolymer. Methods for making such compositions include forming a substantially uniform physical blend of such copolymers. The compositions preferably are substantially free of cross-linked acrylonitrile/styrene copolymer.

Abstract: A polymer composition is disclosed comprising (A) a first grafted acrylate rubber substrate having an average rubber phase particle size of from about 0.05 to about 0.2 micron; (B) a second grafted acrylate rubber substrate having an average rubber phase particle size of from about 0.2 to about 2 microns; and (C) a matrix polymer wherein each of the first and second rubber substrates are grafted with (i) a vinyl aromatic monomer; (ii) an unsaturated nitrile monomer; and (iii) optionally a compatible polymerizable comonomer based on the total weight of the grafted rubber substrate wherein at least one of the acrylate rubber substrates is a copolymer of from 83 to 98 percent by weight of an acrylate monomer and from 17 to 2 weight percent of an unsaturated nitrile monomer based on the total weight of the acrylate nitrile monomer copolymer rubber; and wherein the composition has an Izod impact value of at least 80 Joules/meter when tested at 23.degree. C. according to ASTM D-256 using a test specimen of 6.35 cm.

Abstract: Thermoplastic molding materials compriseA) from 30 to 98% by weight of a graft polymer ofa.sub.K) from 30 to 90% by weight of an elastomeric graft core, obtainable by copolymerization ofa.sub.K /1) from 80 to 99.99% by weight of a C.sub.1 -C.sub.10 -alkyl ester of acrylic acid,a.sub.K /2) from 0.01 to 20% by weight of a crosslinking monomer anda.sub.K /3) from 0 to 40% by weight of one or more further monomers, anda.sub.S) from 10 to 70% by weight of a graft shell ofa.sub.S /1) from 50 to 100% by weight of a styrene compound of the general formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or C.sub.1 -C.sub.8 -alkyl, and/or of a C.sub.1 -C.sub.8 -alkyl ester of acrylic acid or methacrylic acid, anda.sub.S /2) from 0 to 50% by weight of one or more further monomers,B) from 1 to 50% by weight of a thermoplastic polymer ofb.sub.1) from 50 to 100% by weight of styrene and/or .alpha.-methylstyrene,b.sub.2) from 0 to 50% by weight of acrylonitrile andb.sub.

Abstract: Toughened thermoplastics are prepared by mixing a water-moist elastomer component A containing up to 60% by weight of residual water with a thermoplastic polymer B and further polymers C and additives D in an extruder with mechanical dewatering of the elastomer component A, by a process in which the components A, B, C and D are fed to a twin-screw extruder which has corotating screws and essentially comprises, in the transport direction,at least one metering section in which the elastomer component A is fed to the extruder by a metering means,at least one squeeze section which serves for dewatering the component A and contains at least one retarding element and in each case at least one associated dewatering orifice,at least one section in which the thermoplastic polymer B is introduced as a melt into the extruder,at least one section provided with mixing, kneading or other plasticating elements or combinations of these elements,at least one devolatilization section which is provided with at least one devolat

Abstract: A thermoplastic molding composition which contains (i) a grafted copolymer rubber having a grafted phase of styrene-acrylonitrile phase and a crosslinked (meth)acrylate-acrylonitrile substrate, and (ii) an ungrafted, uncrosslinked SAN having a number average molecular weight of about 20,000 to 100,000 is disclosed. The composition which is further characterized in that it contains no additional grafted copolymer rubber based on crosslinked (meth)acrylate-acrylonitrile substrate and in that the grafted copolymer rubber is present in particulate form where the particles have a monomodal size distribution and a weight average particle size of 0.05 to 0.5 microns exhibits improved mechanical properties.

Abstract: Shaped articles produced from thermoplastic molding materials which containA) from 30 to 99.8% by weight of a thermoplastic styrene polymer ofB) from 0.1 to 70% by weight of a graft polymer having an average particle diameter d.sub.50 of less than 300 .mu.mC) from 0.1 to 70% by weight of a particulate polymer as a dulling agent.

Abstract: A styrenic resin composition includes:(1) 5 to 90 weight percent of a graft copolymer (C) prepared by bulk or solution polymerization of 100 parts by weight of monomers including 80 to 45 parts by weight of vinyl aromatic monomers, 15 to 50 parts by weight of vinyl cyanide monomers, and 0 to 40 parts by weight of copolymerizable monomers, in the presence of 0.1 to 10 parts by weight of a rubber graft copolymer (A) having a weight average particle size of 0.05 to 0.8 .mu.m and 0.1 to 10 parts by weight of an acrylic copolymer (B);(2) 95 to 10 weight percent of a graft copolymer (D) prepared by emulsion polymerization of 50 to 15 parts by weight of a mixture of 45 to 80 parts by weight of vinyl aromatic monomers, 15 to 50 parts by weight of vinyl cyanide monomers and, optionally, 0 to 40 parts by weight of copolymerizable monomers, in the presence of 50 to 85 parts by weight of a butadiene rubber having a weight average particle size of 0.05 to 0.8 .mu.

Abstract: The impact resistance of PVC compounds has been shown to be improved by blending with a polybutene polymer. Enhanced thermal stability was also unexpectedly improved with the addition of the polybutene polymer.

Abstract: The invention encompasses a new methacrylate resin blend composition, and a method of making the blend composition, having improved solvent craze resistance. The new blend composition contains a methacrylate matrix resin, particles of a single layer polymer, and, optionally, an acrylic multi-layer polymer. Particles of the single layer polymer derived from 50% or more methyl methacrylate, and having weight average molecular weight (Mw) at least 120% of the Mw of the methacrylate matrix resin component of the blend, the particles having a diameter of from 50 to 500 nanometers, have been discovered to confer a solvent craze resistance value to the methacrylate resin blend which is at least twice the solvent craze resistance value of the methacrylate resin absent particles of the single layer polymer. Solvent craze resistance of the blend may be improved by as much as 10-fold or more over the solvent craze resistance of the methacrylate matrix resin alone.

Abstract: Particulate graft copolymers A) are composed ofa.sub.1) from 5 to 70% by weight, based on A), of a grafting base having a glass transition temperature of less than 10.degree. C. and based ona.sub.11) from 50 to 99.94% by weight, based on a.sub.1), of at least one alkyl acrylate where the alkyl radical is of 1 to 30 carbon atoms,a.sub.12) from 0 to 49.9% by weight, based on a.sub.1), of a further monounsaturated monomer copolymerizable with b.sub.11) anda.sub.13) from 0.01 to 5% by weight, based on a.sub.1), of polyfunctional crosslinking monomers,a.sub.2) from 20 to 85% by weight, based on A), of a stage polymerized in the presence of component a.sub.1) and comprisinga.sub.21) from 95 to 100% by weight, based on a.sub.2), of at least one monomer having a refractive index n.sub.D.sup.20 of more than 1.51 anda.sub.22) from 0 to 5% by weight, based on a.sub.2), of a polyfunctional, crosslinking monomer anda.sub.

Abstract: Emulsion graft copolymers are composed ofA) from 5 to 18% by weight of a first stage comprisinga.sub.1) from 85 to 99% by weight of methyl methacrylate,a.sub.2) from 1 to 15% by weight of C.sub.1 -C.sub.8 -alkyl acrylate,a.sub.3) from 0 to 2% by weight of allyl methacrylate anda.sub.4) from 0 to 3% by weight of further di- or polyfunctional comonomers,B) from 25 to 35% by weight of a second stage comprisingb.sub.1) from 10 to 25% by weight of vinylaromatic monomers,b.sub.2) from 75 to 90% by weight of C.sub.1 -C.sub.20 -alkyl acrylate andb.sub.3) from 0 to 3% by weight of allyl methacrylate,C) from 30 to 40% by weight of a third stage comprisingc.sub.1) from 15 to 27% by weight of vinylaromatic monomers,c.sub.2) from 73 to 85% by weight of C.sub.1 -C.sub.20 -alkyl acrylate andc.sub.3) from 0 to 3% by weight of allyl methacrylate andD) from 15 to 30% by weight of a fourth stage comprisingd.sub.1) from 85 to 96% by weight of methyl methacrylate,d.sub.2) from 3.8 to 10% by weight of C.sub.1 -C.sub.

Abstract: A polyolefin resin composition which comprises:(A) a polyolefin,(B) 0.1 to 100 parts of a core-shell graft copolymer prepared by graft copolymerizing (b) 5 to 60 parts by weight of a monomer component comprising a copolymerizable vinyl compound selected so that the glass transition temperature of a polymer of said monomer component alone is not less than 25.degree. C., onto (a) 40 to 95 parts by weight of a crosslinked rubber-like polymer having a glass transition temperature of not more than 25.degree. C., and(C) 0 to 400 parts of an inorganic filler, said parts of (B) and (C) being parts by weight per 100 parts by weight of (A). The above-mentioned polyolefin resin composition shows the excellent processability, impact resistance, rigidity and surface property.

Abstract: Highly transparent, impact-resistant molding compositions based on polymethyl methacrylate (PMMA), having excellent color stability both during processing at high temperatures, as well as when under thermal stress, as a result of multiple processing with simultaneously high weathering stability and stability of the optical characteristics with the effect of water. Preparation is carried out according to a multi-step extruder process, wherein an extruder for the melt coagulation and one for the compounding are connected in series. Addition of small quantities of reducing inorganic phosphorous compounds at a later stage provides prolonged effectiveness.

Abstract: Thermoplastics built up from N-(2-ethyl-6-methyl)phenylmaleimide and styrene, it being possible for all or some of the styrene to be replaced by at least one other monomer component.

Abstract: A thermoplastic resin composition having excellent characteristics such as impact resistance and coatability is described. The thermoplastic resin composition contains a propylene based polymer and a graft copolymer having an olefin homo/co-polymer portion forming its main chain and a vinyl copolymer portion forming its branched portion. In the graft copolymer, the proportion of the olefin homo/co-polymer portion is 5 to 95% by weight, and the vinyl copolymer portion occupies the remaining weight. The vinyl copolymer portion of the graft copolymer has a hydroxyl group as a functional group. One of the olefin homo/co-polymer portion and the vinyl copolymer portion forms a dispersed phase in the other with a particle size of 0.001 to 10 .mu.m. Consequently, the graft copolymer assumes a multi-phase structure. The thermoplastic resin composition optionally further contains a thermoplastic elastomer.

Abstract: Thermoplastic molding materials preparedA) from 35 to 99.5% by weight of a matrix copolymer (A) ofa.sub.1) from 50 to 95% by weight of styrene and/or .alpha.-methylstyrene,a.sub.2) from 5 to 50% by weight of acrylonitrile anda.sub.3) from 0 to 20% by weight of further comonomersB) from 0 to 50% by weight of a particulate graft copolymer (B) which is insoluble in (A), has a median particle diameter of from 0.03 to 1 .mu.m and preparedb.sub.1) from 30 to 80% by weight of a core comprising an elastomeric polymer having a glass transition temperature of less than -10.degree. C. andb.sub.2) from 20 to 70% by weight of a graft shell comprising a polymer which is compatible or partly compatible with (A)andC) from 0.5 to 30% by weight of a particulate crosslinked copolymer (C) which is insoluble in (A), has a median particle diameter of from 0.5 to 50 .mu.m and comprisesc.sub.1) from 50 to 89.95% by weight of styrene and/or .alpha.-methylstyrene,c.sub.2) from 10 to 50% by weight of acrylonitrile,c.sub.3) from 0.

Abstract: Poly(vinyl chloride), when impact modified with a core/shell impact modifier whose shell is predominantly formed from a C.sub.1 to C.sub.4 alkyl methacrylate and whose core is a copolymer of butyl acrylate and a specific compositional range of certain higher alkyl acrylate monomers, exhibits improved toughness, especially at lower use levels of the modifier or lower test temperatures for the blend, than when the core of the impact modifier is either substantially formed from butyl acrylate alone or substantially formed from the higher alkyl acrylate alone.

Abstract: Polymers containing a high percentage of vinyl alcohol units are difficult to process into sheet, film, injection-molded objects, or fibers. Such melt-processing is greatly enhanced by admixing certain core/shell copolymers having either a rubbery, crosslinked core mainly formed from polymerization of butadiene and/or of an alkyl acrylate, or a non-cross-linked core derived mainly of units derived from an alkyl acrylate, and an outer shell mainly formed from polymerization of methyl methacrylate. Such copolymers do not require the presence of functional groups capable of reaction with the hydroxyl groups of the poly(vinyl alcohol) to impart the improved processing.

Abstract: A method of priming a substrate comprising applying to the substrate a blend comprising (a) a modified block copolymer comprising (i) a polystyrene block and (ii) a polydiene block or a hydrogenated polydiene block, the polydiene block or hydrogenated polydiene block being modified to contain an average of one or more carboxyl groups; and (b) a polymer comprising a polymerization reaction product of two or more mono-ethylenically unsaturated monomers in which (i) at least one of the monomers is an acrylic or methacrylic acid ester of a non-tertiary alcohol having 1 to 14 carbon atoms, inclusive, and (ii) at least one of the monomers is a nitrogen-containing monomer; in particular, a method of enhancing adhesion between a substrate and an adhesive comprising the steps of priming the substrate by applying to the substrate the blend and applying the adhesive to the primed substrate.

Abstract: Thermoplastic molding materials containing a mixture of(A) from 15 to 70% by weight of a methacrylate polymer,(B) from 10 to 50% by weight of a copolymer obtained by polymerization of a mixture of(B1) a vinylaromatic monomer and(B2) a vinyl cyanide,(C) from 20 to 50% by weight of a graft copolymer of(C1) 50-80% by weight of a core of(C11) from 50 to 100% by weight of a 1,3-diene and(C12) from 0 to 50% by weight of a vinylaromatic monomer and(C2) 20-50% by weight of a graft shell of(C21) a C.sub.1 -C.sub.8 -alkyl ester of methacrylic or acrylic acid and(C22) a vinylaromatic monomer,with the proviso that the medium particle size (d.sub.50) of the graft copolymer is chosen in the range from 40 to 500 nm, and(D) from 0.5 to 15% by weight of a crosslinked methacrylate polymer.

Abstract: This invention is directed to a thermoplastic terpolymer excelling in thermal stability and transparency and possessing high mechanical strength, specifically a thermoplastic copolymer (I) composed of 30 to 70% by weight of (A) an aromatic vinyl compound unit, 4 to 40% by weight of (B) a vinyl cyanide unit, and 26 to 50% by weight of (C) an N-substituted maleimide and characterized by having a narrow distribution of molecular weight divisions of copolymer composition as measured by GPC, having substantially no acetone-insoluble content, possessing a weight average molecular weight in the range of 100,000 to 300,000 and a number average molecular weight in the range of 50,000 to 150,000, and having a residual N-substituted maleimide content of not more than 50 ppm.