Abstract: A graft copolymer is formed by graft-polymerizing 10-95 wt. parts of a vinyl monomer onto 5-90 wt. parts of the rubber polymer which comprises 40-99 wt. % of butadiene and 1-60 wt. % of an aromatic polycyclic vinyl monomer represented by the following formula (I) or (II): ##STR1## wherein R denotes a hydrogen atom or a methyl group. The graft copolymer is characterized by the rubber polymer having a high refractive index as well as a low glass transition temperature due to the use of the aromatic polycyclic vinyl monomer. Accordingly, the graft copolymer per se may be used as a thermoplastic resin having good transparency and impact resistance at a low rubber polymer content and may also be added to a transparent thermoplastic resin inclusive of a vinyl chloride resin and a styrene-acrylonitrile copolymer resin to provide the thermoplastic resin with an improved impact resistance while retaining a good transparency.

Abstract: A first reactor is used to graft polystyrene to a rubber-like polymer. A second reactor is used to obtain a mixture of styrene and polystyrene. The effluent from both the first and the second reactors are fed into a quiescent reaction zone where phase inversion occurs. The phase inverted material is fed into post inversion reactors to substantially complete the polymerization of the styrene monomer, and any unreacted styrene monomer is driven off to form the improved high-impact polystyrene.

Abstract: A vinyl chloride resin composition having an improved impact resistance with a good transparency which includes (A) a graft copolymer reinforcing agent prepared by emulsion-polmerizing 15 to 35 parts by weight of a monomer mixture in the presence of 85 to 65 parts by weight of a butadiene homopolymer or copolymer having a butadiene content as high as 82% by weight or more, said monomer mixture containing of 50 to 95% by weight of an aromatic vinyl monomer such as styrene, 0.1 to 40% by weight of a vinyl cyanide monomer such as acrylonitrile and 0 to 40% by weight of other vinyl monomer copolymerizable therewith, and (B) a vinyl chloride resin.

Abstract: A high nitrile thermoplastic resin composition having fluorinated/chlorinated hydrocarbon resistance and comprising a specifically defined graft copolymer obtained by polymerizing a vinyl cyanide compound and an aromatic vinyl compound in the presence of a conjugated diene-based synthetic rubber, or a blend of it and a vinyl cyanide compound/aromatic vinyl compound copolymer, and its use as a fluorinated/chlorinated hydrocarbon-resistant internal box of a refrigerator.

Abstract: The present invention relates to compositions comprising at least one elastomer and at least one plastic. The composition can be produced by preparing the elastomer and then blending it with the plastic. The composition can be subjected to an additional step of curing.

Abstract: A novel thermoplastic resin composition excellent in heat resistance, mechanical properties and processability is provided which comprises a composition containing (A) a dispersing phase of polyphenylene ether obtained by oxidation polymerization of at least one phenol compound represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represents a hydrogen atom, a halogen atom or a substituted or unsubstituted hydrocarbon residue and at least one of them is a hydrogen atom and (B) a crystalline thermoplastic resin matrix phase and (C) a mutual compatibilizer compatible with (A) and/or (B), an average particle diameter in said dispersing phase having of 0.01-10 .mu..

Abstract: Blend compositions are provided comprising first polyvinyl chloride and a second polyvinyl chloride wherein the inherent viscosity (I.V.) of the second polyvinyl chloride, measured in accordance with ASTM1243 is at least about 0.2 units higher than the I.V. of the first polyvinyl chloride. Preferably the I.V. of the second polyvinyl chloride is from 0.2 to 1.0 units higher than the I.V. of said first polyvinyl chloride, with the most preferred difference in I.V. (.DELTA.I.V.) being 0.35 to 0.65 units so as to yield a balance of property improvements including impact resistance, heat distortion temperature, melt flow and melt viscosity. The compositions also can further comprise melt flow enhancers and/or Tg enhancing agents.

Abstract: A heat resistant and impact resistant resin composition is disclosed which composition comprises 5 to 95 parts by weight of a maleimide copolymer (A) prepared by continuous polymerization in the absence of water, containing only small amounts of residual monomers and volatile components, and having a Mw/Mn of not greater than 3, a yellow index of not greater than 30, and an intrinsic viscosity of 0.3 to 1.5, and 5 to 95 parts by weight of a rubber-reinforced resin (B).

Abstract: Molding materials comprising a matrix of high impact polystyrene and rubber incorporated in the form of discrete particles contain not less than 50% by weight of polystyrene A and an effective amount of up to 50% by weight of a graft rubber B. The graft rubber B consists of from 40 to 95% by weight of an elastomeric core b.sub.1 and from 5 to 60% by weight of a shell b.sub.2, i.e. from 5 to 50% by weight of a first shell B.sub.21 of styrene and from 50 to 95% by weight of a second shell b.sub.22 of from 60 to 90% by weight of styrene and from 10 to 40% by weight of acrylonitrile, A and B, b.sub.1 and b.sub.2, b.sub.21 and b.sub.22 and styrene and acrylonitrile each summing to 100% by weight.

Abstract: A substantially gel free C.sub.4 to C.sub.7 isoolefin homopolymer rubber, butyl copolymer rubber, halogenated butyl rubber (e.g., chlorinated or brominated), or mixtures thereof, comprising a molecular weight distribution such that the ratio of the moments of said molecular weight distribution, Mz/Mw, is equal to or exceeds 2.0, and that portion of said molecular weight distribution which is equal to and greater than 4 times the peak molecular weight, Mp, comprises greater than 8 percent of the total polymer species, and Mp is greater than about 250,000 and wherein said polymer species of molecular weight less than Mp are substantially branch free. Various means are disclosed for effecting the molecular weight distribution including blending of homopolymers and/or copolymers of appropriate molecular weight and molecular weight distribution and direct polymerization using a functional reagent to introduce branching.

Abstract: A process of using compositions comprising certain thermoplastic elastomeric polymers for damping and damping compositions comprising soft thermoset polymer containing microscopically discrete segments of said thermoplastic elastomeric polymers.

Abstract: Novel polymer blends are provided comprising a major amount of a linear low density copolymer of ethylene with an olefin containing 4 to 10 carbon atoms (LLDPE) compounded with a minor amount of an ABS resin, based on the total polymer content of the blend. The blends can be fabricated with better processability into blown films having improved antiblocking, impact, and MD tear resistance properties.

Abstract: Blends based on vinyl-aromatic polymers having high tenacity and impact strength, comprising:a vinyl-aromatic copolymer containing from 2 to 25% by weight of an ethylenically unsaturated nitrile and a rubber amount not higher than 15% by weight; anda grafted polymer consisting of an elastomeric core having a transition temperature of the second order lower than 10.degree. C. containing, in the grafted form, chains of vinyl monomers.

Abstract: A water swellable resin composition comprises a water swellable resin and a medium such as a plasticizer, solvent, resin or resin solution. The resin is an alkali metal salt and/or hydrophilic amine salt of a copolymer of hydrophobic polymer chains having an .alpha.,.beta.-ethylenically-unsaturated group at end thereof and a monomer composed principally of (meth)acrylic acid.

Abstract: A thermoplastic resin composition consisting essentially of (A) 10-90% by weight of a graft copolymer (A) obtained by polymerizing a mixture of an alkenyl cyanide compound and an aromatic alkenyl compound in the presence of a butadiene rubber latex in which 40-100% by weight of butadiene rubber particles (A-1) having an average particle diameter of at least 1,300 .ANG. but less than 2,100 .ANG., 0-60% by weight of butadiene rubber particles (A-2) having an average particle diameter of 2,100 .ANG.

Abstract: A process of using compositions comprising certain thermoplastic elastomeric polymers for damping and damping compositions comprising soft thermoset polymer containing microscopically discrete segments of said thermoplastic elastomeric polymers.

Abstract: Disclosed is method for producing a rubber modified thermoplastic reins which comprises carrying out all or a part of the following setps (I) - (VI):(I) a step of mixing the following (A), (B), (C) and thermoplastic resin (2):(A) a latex of graft rubber polymer (1),(B) an organic agent which is capable of dissolving thermoplastic resin (2) and has a solubility in water of 5% by weight or less at a temperature at which (A), (B), (C) and thermoplastic resin (2) are mixed, amount of the organic agent being 10-600% by weight of polymer (4) which is the sum of graft rubber polymer (1) and thermoplastic resin (2) and(C) a water soluble agent capable of coagulating latex (A), amount of this agent being 10% by weight or less of graft rubber polymer (1),(II) a step of separating and removing aqueous phase from a two-phase mixture obtained in the mixing step (I),(III) a step of mixing the mixture from which the aqueous phase has been removed at step (II) and the whole or a part of thermoplastic resin (3),(IV) a step of

Abstract: Novel polymer blends are provided comprising a linear low density copolymer of ethylene with an olefin containing 4 to 10 carbon atoms (LLDPE) compounded with minor amounts of an at least partially isotactic, partially crystalline butene-1 polymer comprising at least about 80 wt. % of polymerized butene-1, and an ABS resin. The blends can be fabricated with better processability into blown films having improved impact and MD tear resistance properties.

Abstract: Disclosed is a thermoplastic resin composition comprising (A) a graft copolymer obtained by emulsion-graft-polymerizing 0 to 20% by weight of an acrylic monomer and 0 to 60% by weight of an aromatic vinyl monomer in the presence of 40 to 80% by weight (as solids) of a diene type rubber polymer latex containing at least 50% by weight of a diene type rubber polymer having a weight average particle diameter of at least 0.3 .mu.m, and (B) a copolymer of an .alpha.,.beta.-unsaturated cyclic anhydride and an aromatic vinyl compound. The thermoplastic resin composition has a high heat resistance and impact resistance.

Abstract: A polymeric polyblend comprising a vinylidene chloride interpolymer and a thermoplastic graft copolymer.

Abstract: Copolymers of .alpha.-methylstyrene and acrylonitrile having improved composition of uniformity are prepared by emulsion polymerizing a first monomer stream having a weight ratio of .alpha.-methylstyrene/acrylonitrile from about 75/25 to about 85/15 and thereafter polymerizing a second monomer feed stream comprising acrylonitrile.

Abstract: A thermoplastic resin composition composed of a mixture comprising a graft polymer obtained by subjecting a monomer mixture of an aromatic vinyl monomer and a vinyl cyanide monomer to emulsion polymerization in the presence of a diene rubber latex, and a hard polymer obtained by copolymerizing a monomer mixture of an aromatic vinyl monomer and a vinyl cyanide monomer, in which the number average particle size Dn of diene rubber particles contained in the composition is at most 0.1 .mu.m, the ratio (Dw/Dn) of the weight average particle size Dw to the number average particle size Dn of the diene rubber particles is at least 5.0, the graft rate of said graft polymer is at least 60%, and the content of an emulsifier and a reaction product of an emulsifier is not higher than 2% by weight.

Abstract: An adhesive composition comprising:a polymer latex containing a copolymer which comprises(a) 40 to 80% by weight of a conjugated diene monomer and(b) 0.5 to 30% by weight of a cyanated vinyl monomer,(c) 5 to 35% by weight of vinylpyridine and(d) not more than 53% by weight of an aromatic vinyl monomer; anda resorcin-formalin resin, which composition can adhere various fibers to rubbers.

Abstract: There is here provided a thermoplastic resin composition containing(I) 99 to 1% by weight of a polypropylene,(II) 1 to 99% by weight of at least one kind of resin selected from the group consisting of an aromatic polyester resin, a polycarbonate resin, a polyamide resin, a polyphenylene ether resin or a mixture of the polyphenylene ether resin and a styrene polymer and an ABS resin, and(III) 0.1 to 100 parts by weight, based on 100 parts by weight of the aforesaid resins (I)+(II), of a multi-phase structure thermoplastic resin which is composed of 5 to 95% by weight of a polyolefin and 95 to 5% by weight of a vinyl polymer or copolymer obtained from at least one kind of vinyl monomer, either of both the components being in the state of a dispersion phase having a particle diameter of 0.001 to 10 .mu.m. A method for preparing the above-mentioned thermoplastic resin composition is also provided here.

Abstract: Novel polymer blends are provided comprising a major amount of a linear low density copolymer of ethylene with an olefin containing 4 to 10 carbon atoms (LLDPE) compounded with a minor amount of an ABS resin, based on the total polymer content of the blend. The blends can be fabricated with better processability into blown films having improved antiblocking, impact, and MD tear resistance properties.

Abstract: When a film consisting of high density polyethylene and about three percent polystyrene is run on an interfolding machine to produce interfolded sheets of the film for use as deli wrap, the film is completely and consistently cut in the machine into sheets that are entirely separated from adjacent sheets. In comparison, sheets made from film consisting of 100 percent high density polyethylene are not consistently completely separated from adjacent sheets.

Abstract: Thermoplastic moulding materials, of vinyl chloride polymers, which contain a polymer, prepared in the presence of mercaptans, from styrene, .alpha.-methylstyrene, vinyltoluene, acrylonitrile, methyl methacrylate or mixtures thereof and which possess improved processing properties.

Abstract: The invention relates to thermoplastic compositions made up of:A. Polyphenylene ethers, in an amount of 15-95 wt. parts;B. Styrene resins, in an amount of 0 to 70 wt. parts;C. E-SBR rubbers, in an amount of 3-15 wt. parts;D. styrene-butadiene polymers prepared by emulsion polymerization (with Styrene incorporated in the copolymer in the amount og 3-15 wt. parts; andE. Optionally, other additives.The invention further relates to a method for preparing such thermoplastic compositions.

Abstract: Novel polymer blends are provided comprising a linear low density copolymer of ethylene with an olefin containing 4 to 10 carbon atoms (LLDPE) compounded with minor amounts of an at least partially isotactic, partially crystalline butene-1 polymer comprising at least about 80 wt. % of polymerized butene-1, and an ABS resin. The blends can be fabricated with better processability into blown films having improved impact and MD tear resistance properties.

Abstract: Emulsion polymerization type thermoplastic resin of high performance can be produced by the following methods: namely, a method which comprises removing an aqueous phase from a two-phase mixture comprising a latex of polymer (1) produced by emulsion polymerization, a water soluble agent (2) in an amount of 10% by weight or less of said polymer (1) which is capable of coagulating the latex of polymer (1) and an organic agent (3) in an amount of 0.1 to 6 times the weight of said polymer (1) which is capable of dissolving both an uncrosslinked polymer contained in said polymer (1) and thermoplastic polymer (4) mentioned hereinbelow and has a solubility in water of 5% by weight or less at 25.degree. C.

Abstract: A process for improving properties of a synthetic resin powder by subjecting a latex of a graft-copolymer whose back bone is a rubber to coagulation, and adding a lubricant to the graft-copolymer in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of said graft-copolymer, and then removing water. The bulk specific gravity of a synthetic resin powder produced is large, the flowability and blocking resistance are remarkably improved in comparison with known methods and blocking during storage is prevented. Lines for transporting the powder do not become packed with the resin powder. It is possible to automatically weigh the resin powder, and the powder does not exhibit a tendency to increase in volume during mass transport.

Abstract: A polymer mixture of(a) 45 to 50 parts by weight of a graft product of a mixture of 25 to 40 parts by weight acrylonitrile and 75 to 60 parts by weight styrene, .alpha.-methylstyrene, alkylmethacrylate or mixtures thereof on a particulate, highly crosslinked diene rubber having a rubber content of 20 to 40% by weight,(b) 45 to 10 parts by weight of a graft product of a mixture of 20 to 35 parts by weight acrylonitrile and 80 to 65 parts by weight styrene or .alpha.-methylstyrene on a particulate, highly crosslinked diene rubber having a rubber content of 50 to 75% by weight, the graft yield being greater than 60% by weight,(c) 10 to 50 parts by weight of a particulate, partially crosslinked, rubber-like copolymer of a C.sub.2 -C.sub.8 alkylacrylate and/or butadiene containing up to 40% by weight (based on copolymer) acrylonitrile which has an average particle diameter (d.sub.50) of from 0.1 to 0.3 .mu.

Abstract: Soft polymer mixtures of(a) 10 to 50 parts by weight of a graft polymer obtained from a particulate, highly cross linked diene or alkyl acrylate rubber and graft polymerized alkyl methacylate, acrylonitrile, styrene, alkyl acrylate or mixtures thereof and(b) 90 to 50 parts by weight of a partly cross-linked, particulate, rubber-like copolymer of acrylonitrile and/or methyl methacrylate and C.sub.1 to C.sub.8 alkyl acrylate having a gel content of from 60 to 99% by weight and an average particle diameter (d.sub.50) of from 0.1 to 0.6 .mu.m,and a process for the preparation of the mixtures and their use for the production of moulded articles.

Abstract: Elastoplastic compositions comprising a continuous crystalline polyolefin phase and at least two phases discretely dispersed in the polyolefin phase, one of which is a dynamically cured EPDM rubber and the other an amorphous and thermoplastic styrene polymer, in which at least 80% of the dispersed particles has a maximum size preferably below 5 .mu.m.The compositions are prepared by masticating a mixture of the components under conditions of dynamic curing of rubber.

Abstract: Thermoplastic compositions comprising rubber modified polyalkenyl aromatic resin and a modifying agent having a core-shell structure comprised of an interpenetrating, cross-linked (meth)acrylate core and a cross-linked styrenic resin shell have significantly improved impact strength, thermal resistance and surface appearance following molding into shaped articles.

Abstract: Disclosed is a method for producing a rubber modified thermoplastic resin which comprises carrying out all or a part of the following steps (I)-(VI):(I) a setp of mixing the following (A), (B), (C) and thermoplastic resin (2):(A) a latex of gfart rubber polymer (1),(B) an organic agent which is capable of dissolving thermoplastic resin (2) and has a solubility in water of 5% by weight or less t a temperature at which (A), (B), (C) and thermoplastic resin (2) are mixed, amount of the organic agent being 10-600% by weight of polymer (4) which is the sum of graft rubber polymer (1) and thermoplastic resin (2) and(C) a warer soluble agent capable of coagulating latex (A), amount of this agent being 10% by weight or less of graft rubber polymer (1),(II) a step of separating and removing aqueous phase from a two-phase mixture obtained in the mixing step (I),(III) a step of mixing the mixture from which the aqueous phase hsa been removed at step (II) and the whole or a part of thermoplastic resin (3),(IV) a step of

Abstract: A heat and impact resistant composition comprising:(A) 5-89 parts by weight of a graft polymer prepared by graft polymerizing 30-75 parts by weight of a mixture of 30-80% of an aromatic vinyl monomer, 10-50% of an N-substituted maleimide monomer, 10-45% of a vinyl cyanide monomer and 0-30% of another copolymerizable vinyl monomer onto 25-70 parts by weight of a diene rubber (a);(B) 10-90 parts by weight of a copolymer obtained by polymerizing a mixture of 30-80% of an aromatic vinyl monomer, 10-50% of an N-substituted maleimide monomer, 10-40% of a vinyl cyanide monomer and 0-30% of another copolymerizable vinyl monomer, or (B') an imido group--containing adduct of a copolymer obtained by reacting a primary amine and/or ammonia with a copolymer obtained by polymerizing a mixture of 30-80% of an aromatic vinyl monomer, 5-50% of an alpha, beta-unsaturated dicarboxylic acid anhydride monomer and 0-40% of another copolymerizable vinyl monomer;(C) 1-45 parts be weight of a graft polymer made by graft polymerizing

Abstract: A rubber modified interpolymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer. The rubber particles of the present invention have a trimodal particle size distribution. Said particles comprise an emulsion polymerized particle and two mass polymerized particles. The compositions exhibit good impact resistance over a broad range of impact speeds.

Abstract: A composition capable of providing low gloss in a part molded therefrom consisting essentially of 20 to 50% by weight of a graft copolymer of ethylenically unsaturated monomers grafted unto a rubber with a rubber content of 5 to 80% by weight based on the weight of Component A; 80 to 50% by weight of one or more thermoplastic, rubber-free copolymers containing: (i) 1 to 25% by weight based on the total weight of Component (B) of an unsaturated dicarboxylic acid anhydride monomer and (ii) 0.5 to 2% by weight based on the total weight of Component (B) of an ethylenically unsaturated copolymerized epoxide compound.

Abstract: The invention relates to a process for the production of graft polymers of resin-forming monomers on a rubber in which a very high graft yield is obtained by the use of an initiator system of an organic hydroperoxie and ascorbic acid. The graft polymers obtained are suitable as thermoplastic molding compositions or as constituents thereof.

Abstract: The specification discloses a readily de-waterable modified rubber concentrate and method for forming same from a process including the preparation of a latex emulsion of the modified rubber concentrate, insuring that the emulsified modified rubber concentrate has a rubber content of from about 57 to about 88% by weight and freeze coagulating the modified rubber concentrate from the emulsion.

Abstract: Strengthened high impact resistant styrene polymers having improved physical-mechanical properties, particularly a high resilience at room temperature and at lower temperatures, and break elongation, containing as a dispersed phase an olefinic rubber, preferably an ethylene-propylene or an ethylene-propylene-diene rubber and a polyolefin. The amount of the polyolefin may be up to 15% by weight.

Abstract: Thermoplastic, high-tenacity, high-flexibility polymeric blends suitable for obtaining molded and thermoformed shaped articles comprising a styrene polymer or copolymer reinforced with ethylene-propylene-diene (EPDM) rubber and an amount higher than 15% by weight of polyethylene.

Abstract: A resin composition having a nacreous gloss comprising (i) a polyvinyl chloride resin and (ii) a polystyrene resin or a high impact polystyrene resin is provided. This composition can be advantageously molded into any article and provide an excellent nacreous gloss thereto.

Abstract: Films of linear ethylene polymers, particularly copolymers of ethylene and alpha-olefins of 4 to 10 carbon atoms (LLDPE), containing up to about 15 weight percent of a 1:3 to 3:1 ratio of polystyrene or poly(para-methylstyrene), and impact polymer, e.g., impact polystyrene, exhibit excellent film properties and improved blocking.

Abstract: Moulded articles of uniform wall thickness are prepared by vacuum-forming or thermoforming a composition comprising a uniform blend of, as base resin, a moulding grade resin having a continuous phase of a first copolymer of a styrenic monomer and an ethylenically unsaturated nitrile and a minor proportion of, as additive resin, a second copolymer of a styrenic monomer and an ethylenically unsaturated nitrile having an ultra high molecular weight, the forming operation being carried out at least 50.degree. C. above the glass transition temperature of the base resin and at a stress level of at most 1 MPa.

Abstract: A process for preparing a polymeric blend stock comprising fluidizing a first particulated polymer, contacting the particulated polymer with droplets of a latex of a second polymer or polymer mixture, retaining the resulting product in a fluid state under conditions sufficient to dry the latex, and recovering the resulting dried polymeric blend stock.

Abstract: Polymeric blends based on vinyl-aromatic polymers endowed with high tenacity and chemical resistance comprising:from 10 to 90% by weight of a vinyl-chloride polymer;from 90 to 10% by weight of a vinyl-aromatic copolymer containing from 2 to 25% by weight of an ethylenically unsaturated nitrile and a quantity not exceeding 15% by weight of a rubber, are disclosed.

Abstract: The invention relates to ABS molding compositions having a markedly reduced residual butadiene content, even at high processing temperatures.

Abstract: A sealant composition comprises a functionalized polymer component which is prepared by grafting enough carboxylic acid, dicarboxylic acid, or derivative thereof onto a polymer component to thereby functionalize the polymer component and provide a resultant sealant composition with adhesive which is resistant to deterioration in the presence of water, said polymer component comprising a multiblock copolymer having at least two end blocks A and at least one midblock B, wherein the A blocks comprise monoalkenyl arene blocks and the B blocks comprise substantially completely hydrogenated conjugated diene polymer blocks.