Abstract: A polymer blend composition consisting essentially of:(i) at least about 55% by weight polystyrene,(ii) from about 1% to about 45% by weight of a selectively hydrogenated block copolymer of conjugated dienes and vinyl aromatic monomers which has been grafted with a carboxylic reagent, wherein the block copolymer contains up to about 50% by weight bound vinyl aromatic monomer, and(iii) from about 0.3% to 45% by weight of at least one block polymer of a vinyl aromatic monomer and conjugated diene, wherein the block polymer contains greater than about 60% by weight bound vinyl aromatic monomer.The polymer composition is useful in preparing multilayer thermoformable structures and articles comprising (A) at least one cap layer and (B) at least one core layer, such as liners for refrigerators and freezers. The multilayer structures and polymer composition have good thermoformability, chemical resistance and surface properties including a glossy finish.

Abstract: A compatibilized polymer alloy has been developed which has excellent processability under thermaforming conditions and the molded articles produced from the alloy exhibit superior gloss, shrinkage, surface hardness, polarity, strength and high heat distortion. The alloy is, in general, comprised of a polyolefin composition, a polystyrene copolymer, or polymer blend, and a compatibilizing agent. This polymer composition or alloy is particularly useful in producing packaging materials and food containers.

Abstract: This invention relates to a multilayer thermoformable structure comprising (A) at least one cap layer and (B) at least one core layer, and polymer compositions for making the same. The multilayer structures and polymer compositions of the invention are useful in preparing thermoformed articles and are particularly useful in preparing liners for refrigerators and freezers. The multilayer structures and the polymer composition have good thermoformability and chemical resistance. The multilayer structures and the polymer composition have good surface properties including a glossy finish. Further these materials are compatible with new blowing agents, such as the hydrochlorofluorocarbons and hydrofluorocarbon blowing agents, which are more environmentally friendly. The layers of the multilayer structure do not require a glue layer.

Abstract: A thermoplastic multiphase composition is provided which is a melt blend of a functionalized block or graft copolymer and a polyamide. The blend is made from polymers. That is, an elastomeric polymer is blended with a reactive polymer having a functionality which is reactive with the polyamide. This blending occurs under conditions, such as in the presence of free radicals, which lead to the coupling of the elastomeric polymer and the reactive polymer and forms a block or graft copolymer. The graft or block copolymer is then blended with a polyamide. The composition is a multi-phase composition wherein the polyamide is generally a continuous phase, and the block or graft copolymer is present in the form of a particulate dispersed phase. The polyamide compositions have a wide range of improved properties such as good low temperature (e.g., minus 40.degree. C.) impact resistance and good high temperature heat deflection (e.g., 65.degree. C).

Abstract: A thermoplastic multiphase composition is provided which is a melt blend of a functionalized block or graft copolymer and a polyamide. The blend is made from polymers. That is, an elastomeric polymer is blended with a reactive polymer having a functionality which is reactive with the polyamide. This blending occurs under conditions, such as in the presence of free radicals, which lead to the coupling of the elastomeric polymer and the reactive polymer and forms a block or graft copolymer. The graft or block copolymer is then blended with a polyamide. The composition is a multiphase composition wherein the polyamide is generally a continuous phase, and the block or graft copolymer is present in the form of a particulate dispersed phase. The polyamide compositions have a wide range of improved properties such as good low temperature (e.g., minus 40.degree. C.) impact resistance and good high temperature heat deflection (e.g., 65.degree. C.).

Abstract: Peroxide-provided free-radical molecular weight distribution narrowing of polypropylenes in the compounding stage of making conductive polypropylenes yields carbon black filled polypropylenes with improved rheological properties, surface conductivity, appearance, and surface characteristics with mechanical and physical properties similar to prior conductive polypropylenes.

Abstract: A compatibilized polymer alloy has been developed which has excellent processability under thermoforming conditions and the molded articles produced from the alloy exhibit superior gloss, shrinkage, surface hardness, polarity, strength and high heat distortion. The alloy is, in general, comprised of a polyolefin composition, a polystyrene copolymer, or polymer blend, and a compatibilizing agent. This polymer composition or alloy is particularly useful in producing packaging materials and food containers.

Abstract: Lens grinding or polishing pads are provided, characterized by a bonding system which permits them to be quickly and easily contact-adhered to the surface of a lens finishing tool, but which pads at the same time display strong resistance to lateral displacement during use. These pads can also be readily and easily stripped from the finishing tool without deformation or damage to them.

Abstract: A copolyester resin having minimal carboxyl terminated ends, is disclosed, as well as the method for making it. The esterification-condensation reaction is employed reacting a diol, a dicarboxylic compound, and a chain branching agent. The chain branching agent is limited in concentration to less than 10 mole percent of the dicarboxylic compound and is charged prior to the condensation stage of the reaction. The copolyester resin so produced achieves minimal carboxyl terminated ends, which when used in coatings, yields a clear resin free of carbon dioxide impurities.

Abstract: This invention relates to thermosetting copolyesters of terephthalic acid, trimellitic acid and neopentyl glycol units. The compositions can vary from about 95/5 neopentyl terephthalate trimellitate to about 85/15 neopentyl terephthalate trimellitate. They can be cured to form excellent coatings on industrial goods and consumer items such as outdoor furniture.

Abstract: There is disclosed improved hydrolytically and thermally stable industrial polyester yarns prepared by melt spinning a polyester resin in the presence of a carbodiimide selected from the group consisting of mono- and bis-carbodiimides wherein the amount of carbodiimide employed is equivalent to the concentration of COOH groups in the original resin plus the concentration of COOH groups generated when the original resin is extruded in the absence of carbodiimide.