Abstract: Tough multi-phase thermoplastic compositions consisting essentially of 55 to 99 parts by weight of a polyamide matrix and 1 to 45 parts by weight of a multiphase polymer comprising 50 to 90 parts by weight of a crosslinked elastomer core and 10 to 50 parts by weight of a rigid polymer shell comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of an interpolymerized C.sub.1 to C.sub.8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of an interpolymerized acrylonitrile. The toughened compositions are useful for making molded and extruded parts possessing impact resistance and ductility.

Abstract: Tough multi-phase thermoplastic compositions consisting essentially of 55 to 99 parts by weight of a polyamide matrix and 1 to 45 parts by weight of a multiphase polymer comprising 50 to 90 parts by weight of a crosslinked elastomer core and 10 to 50 parts by weight of a rigid polymer shell comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of an interpolymerized C.sub.1 to C.sub.8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of an interpolymerized acrylonitrile. The toughened compositions are useful for making molded and extruded parts possessing impact resistance and ductility.

Abstract: A multiphase core//shell polymer comprising a crosslinked elastomer core and a rigid thermoplastic polymer shell comprising a mono alkyl maleate or fumarate, styrene and optionally a monomer selected from the group consisting of C.sub.1 to C.sub.8 alkyl acrylates and methacrylates, acrylonitrile and methacrylonitrile. The core has an average particle diameter in the range of about 0.3 to about 0.8 micron and the rigid shell has a thickness of at least about 0.025 micron. The multiphase core//shell polymers are useful for blending with polyamides to provided toughened polyamide compositions.

Abstract: Flame retardant resin compositions are disclosed, comprising a thermoplastic condensation polymer selected from the group consisting of polyesters, polycarbonates and polyamides, a halogenated flame-retardant, and a rubber-occluded flame retardant synergist. The compositions possess superior stability in melt processing and improved flame retardancy and impact strength.

Abstract: Flame retardant resin compositions are disclosed, comprising a thermoplastic condensation polymer selected from the group consisting of polyesters, polycarbonates and polyamides, a halogenated flame-retardant, and a rubber-occluded flame retardant synergist. The compositions possess superior stability in melt processing and improved flame retardancy and impact strength.

Abstract: A multiphase core//shell polymer comprising a crosslinked elastomer core and a rigid thermoplastic polymer shell comprising a mono alkyl maleate or fumarate, styrene and acrylonitrile. The core has an average particle diameter in the range of about 0.3 to about 0.8 micron and the rigid shell has a thickness of at least about 0.25 micron. The multiphase core//shell polymers are useful for blending with polyamides to provided toughened polyamide compositions.

Abstract: Polyarylene ester compositions comprising an intimate admixture of polyarylene ester and up to about 10 weight percent of an elastomeric ethylene 1-alkene copolymer. The compositions possess greatly improved impact resistance and reduced notch sensitivity in comparison with the polyarylene ester and exhibit improved melt flow with minimal loss in flame retardance, heat distortion resistance and tensile properties. The compositions are useful as molding powders and sheet extrusion compounds.

Abstract: Flame retardant resin compositions are disclosed, comprising a thermoplastic condensation polymer selected from the group consisting of polyesters, polycarbonates and polyamides, a halogenated flame-retardant, and a rubber-occluded flame retardant synergist. The compositions possess superior stability in melt processing and improved flame retardancy and impact strength.

Abstract: Molding resins are disclosed which comprise a polyarylene ester containing recurring units derived from 1,2-bis(4-hydroxyphenyl)ethane, an inorganic reinforcing agent and a thermoplastic vinyl addition polymer. The reinforcing agent preferably comprises capsules in which glass fiber strands are encapsulated in collimated array within the thermoplastic vinyl addition polymer.

Abstract: Disclosed herein are glass concentrate capsules useful in forming reinforced thermoplastic resin composites, said capsules comprising 50 to 90% by weight of glass strands having a length of from about 0.80 to about 20 mm which strands are arranged in a substantially collimated array within a low molecular weight crystalline organic material, wherein the individual strands in the collimated array and the collimated array of glass strands are encapsulated in the low molecular weight crystalline organic material.