Abstract: A novel, heat curable, liquid polymer composition is disclosed which comprises a modified polyurethane oligomer containing terminal ethylenic unsaturation and a free radical generating catalyst. In a preferred embodiment, the polymer composition further includes at least one additional component selected from a reinforcing agent and a filler.

Abstract: Blends of an aromatic polycarbonate, such as a polycarbonate of bisphenol-A, with a monovinylidene aromatic/carboxylic acid random copolymer, such as styrene/acrylic acid copolymer, exhibit improved impact strength and heat resistance. Such blends are particularly useful in the manufacture of molded parts which must be exposed to high temperature during manufacture and use. An example of a particularly desirable blend is a blend of a homopolycarbonate of bisphenol-A with styrene/acrylic acid copolymer and an acrylate resin containing grafted and nongrafted butadiene rubber and methyl methacrylate/ethyl acrylate random copolymer.

Abstract: This invention provides a graft copolymer of at least one acrylic monomer and chlorinated natural or synthetic rubber, in which at least about 8 percent of the total weight of said graft copolymer is derived from acrylic acid, methacrylic acid, or both. It also provides aqueous dispersions of such graft copolymers and coating compositions containing them.

Abstract: A novel, heat curable, liquid polymer composition is disclosed which comprises a modified polyurethane oligomer containing terminal ethylenic unsaturation, a free radical generating catalyst, and at least one additional component selected from a reinforcing agent and a filler. The cured composition demonstrates desirable impact properties and is particularly useful in automotive body constructions.

Abstract: Molding materials containing high molecular weight polyphenylene ethers are produced by a process in which a solution of a polyphenylene ether in an organic solvent, together with another polymer, is freed of solvent by multi-stage evaporation.The solvent is preferably an aromatic compound from the class comprising the hydrocarbons, halohydrocarbons, ethers or esters, the ratio of the other polymer to the polyphenylene ether is advantageously from 99:1 to 20:80 parts by weight, the other polymer is, in particular, a homopolymer or copolymer of styrene or of a homolog thereof, which may be modified with rubber, and the multi-stage evaporation process preferably comprises not less than two and not more than four working up stages.The evaporation is carried out in general at from 120.degree. to 280.degree. C. and under a pressure of from 1 to 3,000 mbar, advantageously in the presence of assistants which reduce the partial pressure, eg. water and/or methanol.

Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.

Abstract: A thermoplastic molding material contains 50-90% by weight of a hard component A comprising one or more copolymers of styrene and/or .alpha.-methylstyrene with acrylonitrile, and 50-10% by weight of a graft copolymer B comprising 40-80% by weight of a crosslinked acrylate polymer which has a mean particle size greater than 0.8 .mu.m (d.sub.50 value of the cumulative mass distribution) and onto which 20-60% by weight of a mixture of styrene and acrylonitrile in a weight ratio of from 88:12 to 65:35 is grafted.The novel molding material is used for the production of moldings.

Abstract: Novel compositions are provided which comprise a polyphenylene ether, optionally a high impact polystyrene, optionally, an effective amount of an aromatic phosphate flame retardant, and a low molecular weight polymer selected from a polyolefin glycol or a polyamide, said composition being free from or excluding a substantial content of polyolefin, such as polyethylene. Such compositions when molded are readily paintable, and exhibit good adhesion between the paint and the molded compositions as distinguished from compositions containing polyolefins, such as polyethylene, which has been found to adversely affect paint adhesion. In addition, the novel compositions possess good or improved Izod and Gardner impact strengths, and in the case of polyolefin glycol, such as polyethylene glycol, the mutual solubility of all the components of the compositions is increased. Included within the disclosure of the invention are methods of preparing and molding such compositions and the molded products obtained therefrom.

Abstract: A rubber composition having improved cut growth resistance, processability and dimensional stability is disclosed, which comprises not less than 20 parts by weight of polyisoprene having a melting point of not less than 10.degree. C. and a content of cis-1,4 bond of not less than 88% and the balance of at least one diene rubber.

Abstract: Vulcanizable, elastomeric, sulphur-modified polychloroprene rubbers having improved properties are obtained by adding up to 40%, by weight, of SBR latex (solids, based on total solids) before working-up and before or after peptization.

Abstract: An adhesive composition comprising a combination of a styrene-butadiene block copolymer, a cyclopentadiene-styrene resin and a random terpolymer of 1,3-pentadiene, a monocyclic terpene, and alpha methylstyrene. A flexible film laminate and product pouchor tube therefrom comprising two or more polymer film layers adhesively bonded together by means of a layer of the defined adhesive.

Abstract: A latex of a highly crosslinked butadiene rubber polymer comprising not less than 50% of butadiene, 1.0 to 10% of a crosslinking agent and a remainder of an ethylenically unsaturated monomer copolymerizable with butadiene, and having a particle size of 600 to 3,000 .ANG. and a degree of swelling of not greater than 7 is obtained by one or more stages of emulsion polymerization. By polymerizing 15 to 30 parts of a monomer mixture of an alkyl methacrylate, an aromatic vinyl monomer, and optionally a crosslinking agent and an unsaturated nitrile in the presence of 85 to 70 parts of the rubber polymer, a graft copolymer is obtained. A composition comprising 2 to 40% of this graft copolymer and 98 to 60% of a vinyl chloride resin possesses high impact resistance coupled with improved stress-whitening resistance, which properties cannot be easily obtained at the same time in conventional resin compositions.

Abstract: A thermoplastic molding material which contains two graft copolymers in a matrix of a copolymer based on styrene and acrylonitrile. The first graft copolymer (B) comprising a hard phase prepared from one or more vinyl-aromatic monomers and an elastomer phase, the elastomer phase particles having a diameter of from 0.5 to 5 .mu.m. The second graft copolymer (C) comprising a hard phase and an elastomer phase, said elastomer phase having a bimodal particle distribution in which the diameter of one category of particles is from 0.05 to 0.18 .mu.m and the second category of particles has a mean diameter of from 0.25 to 0.6 .mu.m.

Abstract: This invention relates to a composition comprising a mixture of at least two ethylene-rich ethylene/alpha-olefin copolymers (A) and (B) below which has excellent transparency and impact strength and improved properties, particularly low-temperature heat sealability, heat seal strength and flexural resistance.(A) 95 to 40% by weight of a random copolymer of ethylene and an alpha-olefin having 5 to 10 carbon atoms which has a melt index of 0.1 to 20 g/10 min., a density of 0.910 to 0.940 g/cm.sup.3, a crystallinity by X-rays of 40 to 70%, a melting point of 115.degree. to 130.degree. C. and an ethylene content of 94 to 99.5 mole %; and(B) 5 to 60% by weight of a random copolymer of ethylene and an alpha-olefin having 3 to 10 carbon atoms which has a melt index of 0.1 to 50 g/10 min., a density of 0.870 to 0.900 g/cm.sup.3, a crystallinity by X-rays of 5 to 40%, a melting point of 40.degree. to 100.degree. C. and an ethylene content of 85 to 95 mole %.

Abstract: A thermoplastic polymer composition containing (i) a modified block copolymer of an aromatic vinyl compound and a conjugated diene compound, which is modified with a dicarboxylic acid or the derivative thereof, or the ionically crosslinked product of the modified block copolymer with a univalent, bivalent of trivalent metal ion and (ii) a thermoplastic polymer having a polar group. This thermoplastic polymer composition has excellent mechanical and other properties. The compatibility of each component in the thermoplastic composition is remarkably improved.

Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.

Abstract: A diffusion control layer comprising a polymerization product of a monomer capable of undergoing .beta.-elimination in an alkaline environment is disclosed for use in diffusion transfer film units, as an interlayer or overcoat in photosensitive elements, or as a timing layer or overcoat in image-receiving elements.

Abstract: Graft polyblends prepared by polymerizing acrylate ester monomers or mixtures of acrylate ester monomers and vinyl aromatic monomers in the presence of a rubbery saturated hydrocarbon polymer substrate are useful as modifiers for PVC, imparting improved flow and impact properties to PVC formulations when employed at low levels. The rubbery saturated hydrocarbon substrates useful for these purposes include mono-olefin polymers such as polyisobutylene, rubbery copolymers such as EPR, and rubbery hydrogenated polymers and copolymers of conjugated dienes.

Abstract: The impact strength of poly(p-methylstyrene) is improved by incorporating both a thermoplastic elastomer and a non-thermoplastic diene elastomer during the polymerization of the p-methylstyrene.

Abstract: The invention relates to a process for manufacturing unsaturated polyester resins with suppressed volatilization of monomer, useful in the manufacture of laminates, moulding compounds, varnish coatings and castings. It is known a process for manufacturing unsaturated polyester resins by dissolving unsaturated polyesters in monomers with the addition of paraffin, waxes, ceresin wax, emulsifiers forming emulsions of the "water-in-oil" or "oil-in-water" type. These additives suppress the volatilization of monomers, but they exhibit a limited solubility in the resin and a majority of them separate on the surface during curing of the polyester resin and, thus, reduce the adhesion capacity of the subsequent layers of resin or laminates to the previously cured substrate.It has been found that unsaturated polyester resins with suppressed volatilization of monomer can be prepared by dissolving the unsaturated polyester in the monomer and by introducing 0.005-5.