Abstract: A cable filler composition comprises a mixture of a mineral oil, a styrene-ethylene-butylene-stryene block copolymer and 2 to 6 weight percent of an isotactic, crystalline polypropylene, the polypropylene having an average molecular weight of between 20,000 and 50,000.

Abstract: A cable filler composition comprises a mixture of mineral oil, a styrene-ethylene butylene-stryene block copolymer, and about 2-6 percent by weight of a thermoplastic polymer comprising an isotactic, crystalline polypropylene copolymer containing 0.1-4% by weight of an olefinic comonomer, the copolymer having a molecular weight of between 20,000 and 40,000.

Abstract: A molding composition consists of an intimate mixture of:(1) about 25 to about 40 percent calcium carbonate having an average particle size range of from about 450 to about 850 millimicrons and(2) about 60 to about 75 percent star-block copolymer of:(a) about 60 to about 95 percent vinyl aromatic compound and(b) about 40 to about 5 percent conjugated diene, said star-block copolymer having from about 3 to about 20 arms, at least some of the arms comprising random segments substantially free from significant blocks of either monovinyl aromatic component or conjugated diene component.

Abstract: Low density, lightweight foam articles may be provided with certain portions or regions thereof, that are reinforced, having higher density and strength, obtained by compression of the foam in these locations, during or after formation of the foam. Such locations may be made sufficiently strong and dense to allow the article to be attached in place by fastening means, imbedded therein. The increase in density can be as much as from 5 pcf to 10 pcf or higher, depending upon the particular application.Many foam materials, capable of being molded, extruded, or otherwise shaped to a predetermined configuration, may be made with this combination of high and low density, including foams of styrenic polymer or copolymer compositions, urethanes, vinyls, and even non-thermoplastic based materials, such as phenolic foams.

Abstract: Expandable styrene polymer particles which have fast cooling rates during molding are produced by dry blending styrene polymer particles in the presence of 0.06 to 0.60 parts of a mixture of alkyl esters of fatty acids per 100 parts of polymer particles. The ester mixture may be added as sole fast cool agent or in addition to the known internal additives which impart fast cool properties.

Abstract: Expandable styrene polymer particles which have fast cooling rates during molding are produced by dry blending styrene polymer particles in the presence of 0.06 to 0.60 parts of decaglyceroloctaoleate per 100 parts of polymer particles. The oleate may be added as sole fast cool agent or in addition to the known internal additives which impart fast cool properties.

Abstract: Copolymers of monovinyl aromatic monomers and the anhydrides of ethylenically unsaturated dicarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said composition having fire retardant properties.

Abstract: Several established methods produce precursor beads suitable for subsequent impregnation with a volatile agent for making expandable polystyrene beads. Different methods have led to production of reflector beads of crystal clear polystyrene for use as reflectors in movie screens, signs, and the like. Heretofore it has not been practical to use precursor beads as reflector beads. Many reflector beads have been made from plastics more costly than polystyrene. By the present invention, cloudy precursor beads are dispersed in an aqueous solution having a concentration of from about 1.5 to about 6 molar inorganic solute and heated to a temperature in the range from about 110.degree. to 130.degree. C. for a few minutes. The thus treated beads are rinsed with water and then dried to provide reflector beads.

Abstract: Many reflector beads have been made from plastics more costly then polystyrene. By the present invention, water white, crystal clear polystyrene beads are prepared from styrene by polymerization in an aqueous solution having a concentration of from about 2.5 to about 6 molar inorganic solute, at conditions corresponding to production of uniformly sized polystyrene beads of the type ordinarily used as precursor for expandable polystyrene beads. The thus produced beads are rinsed with water and then dried to provide reflector beads.

Abstract: Rubber-modified copolymers of monovinyl aromatic, monomers and imide derivatives of ethylenically unsaturated dicarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said foam composition having fire-retardant properties.

Abstract: Copolymers of monovinyl aromatic monomers and ethylenically unsaturated monocarboxylic acid amide monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said foam composition having fire-retardant properties.

Abstract: Copolymers of monovinyl aromatic monomers and imide derivatives of ethylenically unsaturated dicarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said composition having fire retardant properties.

Abstract: A unique high efficiency catalyst for the polymerization of alpha-olefins has been developed based on the use of methanol treated magnesium oxide as support, an equimolar mixture of titanium tetrachloride and tetrabutyltitanate as titanium source impregnated on the support, and an organoaluminum compound as reducing agent. The polyethylene produced by this catalyst has narrow molecular weight distribution, high bulk density, high melt index, and minimum catalyst residue due to the high polymer to catalyst ratio. The copolymers produced by this catalyst have narrow molecular weight distribution, but have lower bulk density, low melt index and low density.

Abstract: An advantageous blend suitable for compression molding, injection molding, or general molding of plastic articles is prepared by mechanically mixing at an elevated controlled temperature a polyurethane resin and a resin derived from copolymerization maleimide and styrene.

Abstract: Rubber-modified copolymers of monovinyl aromatic monomers and ethylenically unsaturated monocarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said foam composition having fire-retardant properties.

Abstract: The invention concerns thermoplastic molding compositions consisting essentially of a blend of:A. From about 40% to about 70% by weight of an interpolymer comprising from about 8% to about 16% block polyalkadiene, and from about 51% to about 85% styrene and from about 5% to about 35% methacrylic acid.B. From about 30% to about 60% of a polyurethane thermoplastic rubber.

Abstract: An advantageous blend suitable for the molding of plastic articles is prepared by mechanically mixing a polyphenylene ether resin and a resin prepared by conducting the polymerization of a mixture of a rubber, maleimide, and styrene.

Abstract: Expandable styrene polymer particles which have fast cooling rates during molding are produced by dry blending styrene polymer particles in the presence of 0.06 to 0.60 parts of decaglyceroloctaoleate per 100 parts of polymer particles. The oleate may be added as sole fast cool agent or in addition to the known internal additives which impart fast cool properties.

Abstract: An advantageous blend suitable for the molding of plastic articles is prepared by mechanically mixing a polyphenylene ether resin and a polymeric resin derived from maleimide and styrene.

Abstract: Copolymers of monovinyl aromatic monomers and ethylenically unsaturated monocarboxylic acid monomers are blended with water as a blowing agent, bromodiphenylethers as fire retardants, and metal oxides as synergist for the ethers to form a composition which can be foamed to densities of between 1 and 10 pounds per cubic foot, said foam composition having fire-retardant properties.