Abstract: A composition useful in molding comprises (A) from 10-95% by weight of a syndiotactic styrene resin, (B) from 5-90% by weight of a thermoplastic resin such as a polyolefin, polyester, polyether, polyamide or polycarbonate, and ( ) from 1-15 parts by weight of a rubber polymer such as maleic anhydride-modified or unmodified styrene-(butadiene or isoprene) block copolymer.

Abstract: A polystyrene-based resin composition, comprising (A) a styrene-based resin with a mainly syndiotactic configuration, (B) a polyolefin, and (C) rubber polymer particles as main components, exhibits excellent heat resistance and impact resistance.

Abstract: A composition amenable to injection molding and extrusion comprises a syndiotactic styrene resin, a thermoplastic resin such as a polyolefin and an inorganic filler optionally contains a rubber.

Abstract: A composition comprises (A) a syndiotactic styrene-based resin and (C) rubber polymer particles such as graft copolymers, butadiene or isoprene block copolymers optionally hydrogenated and/or modified with maleic anhydride, and other rubbers, and, optionally, (B) a thermoplastic resin such as a polycarbonate, and/or (D) a filler such as glass fibers.

Abstract: Novel styrene-based resin compositions comprising a styrene-based resin having a mainly syndiotactic configuration in compbination with one or more of: (A) thermoplastic resins other than the styrene-based resin, (B) a rubber polyers, and (C) inorganic fillers. The compositions have improved heat resistance and impact resistance over non-syndiotactic styrene-based resin compositions.

Abstract: A polystyrene-based resin composition containing a styrene-based resin with mainly syndiotactic configuration, a polyamide, and a rubber polymer as main components.

Abstract: A composition comprising 20-80 weight percent of a styrene polymer with mainly syndiotactic configuration, and 20-80 weight percent of a polycarbonate, and optionally an inorganic filler.

Abstract: A polystyrene-based resin composition containing a styrene-based resin with mainly syndiotactic configuration and filler as main components. Styrene-based resins of mainly syndiotactic configuration include polystyrene, poly(alkylstyrene), poly(halogenated styrene), poly(alkoxystyrene), styrene copolymers comprised of polymerized units of at least of styrene, alkylstyrene, halogenated styrene and alkoxystyrene, and mixtures thereof.

Abstract: A polystyrene-based resin composition containing a styrene-based resin with mainly syndiotactic configuration and filler as main components. Styrene-based resins of mainly syndiotactic configuration include polystyrene, poly(alkylstyrene), poly(halogenated styrene), poly(alkoxystyrene), styrene copolymers comprised of polymerized units of at least of styrene, alkylstyrene, halogenated styrene and alkoxystyrene, and mixtures thereof.

Abstract: Disclosed is a styrene polymer composition comprising, in a specified proportion,(A) a styrene polymer having no functional group, and(B) either of polyphenylene ether having a polar group or a mixture of polyphenylene ether having a polar group and a styrene polymer having no functional group; or a styrene polymer composition comprising (C) polyamide, as well as above Components (A) and (B).These polymer compositions are excellent in impact resistance, water resistance, and mechanical properties, and are suitable for various purposes.

Abstract: Disclosed is a styrene polymer composition comprising, in a specified proportion,(A) a styrene polymer having no functional group,(B) either of polyphenylene ether having a polar group or a mixture of polyphenylene ether having a polar group and a styrene polymer having no functional group; and(C) polyamide.These polymer compositions are excellent in impact resistance, water resistance, and mechanical properties, and are suitable for various purposes.

Abstract: A process of producing a styrene polymer molding which comprises heat treating a molding of a crystalline styrene polymer having mainly a syndiotactic configuration and having a crystallinity of at least 10% as determined by X-ray diffraction analysis. The heat treating is carried out at a temperature of 150.degree.to 250.degree. C. for 20 seconds to 90 minutes.

Abstract: A styrene-based resin composition containing (A) a styrene-based resin with mainly syndiotactic configuration and (B) a thermoplastic resin other than the styrene-based resin exhibit excellent heat resistance and impact resistance. Optionally, the styrene-based resin composition may further contain (C) a rubber polymer and/or (D) an inorganic filler. More particularly, a composition containing 1-98% by weight (A) 1-98% by weight of a styrene-based resin with mainly syndiotactic configuration and 1-98% by weight (B) a polyethylene terephthalate resin or a polyester resin is disclosed.

Abstract: Styrene-based polymer moldings with a crystallinity of at least 20% obtained by subjecting moldings of crystalline styrene-based polymers having mainly syndiotactic configuration to heat treatment at a temperature of 120.degree. to 270.degree. C. These moldings are excellent in physical properties such as heat resistance and chemical resistance, and thus are expected to find various applications, for example, in general construction materials, electric or electronic devices, and car parts.

Abstract: Disclosed is a resin composition which comprises (a) 5 to 95% by weight of a styrene-based polymer having a syndiotactic configuration, (b) 95 to 9% by weight of a thermoplastic resin having at least one polar group selected from a carboxyl group, a hydroxyl group and an amino group at the terminal; and (c) 0.01 to 15 parts by weight of a styrene-based copolymer obtained by copolymerizing a styrene compound with a vinyl compound having an epoxy group or a styrene-based copolymer obtained by copolymerizing a styrene compound with an .alpha.,.beta.-unsaturated carboxylic acid anhydride based on 100 parts by weight of the aobve components (a) and (b). The composition exhibits no laminar peeling and has an excellent appearance because affinity and dispersibility of the styrene-based polymer and the thermoplastic resin are improved, and a polystyrene-based resin composition improved in mechanical strength can also be obtained without using a complicated process.

Abstract: Disclosed is a process for producing a styrene polymer composition, which comprises polymerizing styrene monomer using a catalyst comprising (A) aluminoxane and (B) a compound of the group IV B transition metal in the periodic table, in the presence of rubber-like elastomer.The resin composition obtained thereby is superior in heat resistance, and impact strength, and utilized as the starting material for various moldings.

Abstract: Disclosed is a styrene polymer composition comprising, in a specified proportion,(A) a styrene polymer having no functional group, and(B) either of polyphenylene ether having a polar group or a mixture of polyphenylene ether having a polar group and a styrene polymer having no functional group; or a styrene polymer composition comprising(C) polyamide, as well as above Components (A) and (B).These polymer compositions are excellent in impact resistance, water resistance, and mechanical properties, and are suitable for various purposes.

Abstract: The present invention relates to a flame-retardant resin composition having halogen content of 2 to 40% by weight basing on the amount of said composition, which comprises(a) 100 parts by weight of a styrene-based polymer having mainly syndiotactic configuration, or a mixture of 99 to 50% by weight of said styrene-based polymer and 1 to 50% by weight of a thermoplastic resin (exclusive of tetrafluoroethylene-based polymer) and/or rubber;(b) 3 to 40 parts by weight of a flame retardant selected from the group consisting of halogenated polystyrenes and halogenated polyphenylene oxides and(c) 1 to 15 parts by weight of an auxiliary flame retardant, as main components.In addition, the present invention contains the above components (a), (b) and (c) as main components, and further contains(d) 0.003 to 10 parts by weight of tetrafluoroethylene-based polymer and/or(e) 1 to 300 parts by weight of an inorganic filler.

Abstract: The present invention relates to a styrene-based resin composition comprising a styrene-based polymer having mainly a syndiotactic configuration and a specified antioxidant, a fibrous molding or extrusion produced by spinning a syndiotactic styrene resin composition and a molding produced by shaping and/or spinning, and stretching said resin.

Abstract: A stampable sheet which comprises 95 to 20% by weight of styrene polymer having a syndiotactic configuration (a) and 5 to 80% by weight of fibrous reinforcing material having an average fiber length of at least 1 mm (b) which is excellent in heat resistance, impact resistance, dimensional stability and dielectric properties is disclosed.