Abstract: Propylene polymer compositions of the present invention comprising a specific propylene block copolymer, specific ethylene-propylene copolymer rubber, specific ethylene-propylene-diene copolymer rubber, specific ethylene-butene-1 copolymer rubber, and talc in specific proportions are provided. The propylene polymer compositions of the invention are capable of providing therefrom molded products excellent in balance between stiffness and impact resistance, and having high surface hardness with excellent scratch resistance.

Abstract: A resin composition for an automobile bumper comprising components (A), (B), and (C) described below:(A) 45 to 74% by weight of a crystalline ethylene-propylene block copolymer having (a) a flexural modulus of 15,000 kg/cm.sup.2 or more, (b) an ethylene content of 5 to 20% by weight, (c) an intrinsic viscosity (decalin, 135.degree. C.) of a portion soluble in p-xylene at room temperature of 3 or more, (d) a melt flow index (MI) of 21 to 70 g/10 min., and (e) a content of a portion insoluble in boiling n-heptane of 97% by weight or more;(B) 21 to 35% by weight of elastomer selected from the group consisting of components (I), (II) and (III) and having a weight ratio of (I) : [(I)+(II)+(III)] of from 0.5 to 1.0, (a) said component (1) being an amorphous ethylene-butene copolymer having a butene content of 10 to 25% by weight and a Mooney viscosity value, (ML.sub.1+4, 100.degree. C.

Abstract: A thermoplastic resin composition which contains a resin composition containing a crystalline polypropylene component, an ethylene-butene-1 copolymer rubber and an ethylene-propylene copolymer rubber; a modified polypropylene; a saturated polyester resin; and an epoxy group-containing copolymer; and optionally talc exhibits high low-temperature impact strength, stiffness and Rockwell hardness and a small coefficient of linear expansion, which composition gives an injection-molded article suitably used for a bumper for automobile.

Abstract: A process for reclaiming waste plastics having a paint film which includes subjecting the paint film to a hydrolysis treatment by immersing the waste plastics having a urethane paint film or an amino resin paint film in a treating liquid, or contacting the waste plastics with the vapor of a treating liquid, to decompose the paint into lower molecular weight compounds. The resulting waste plastics are then heated and kneaded to disperse the products of the hydrolysis in the waste plastics, and there is recovered a reclaimed waste plastics product having good mechanical properties.

Abstract: A resin composition having excellent paint coatability containing (a) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, (b) 20-40 weight % of an ethylene-.alpha.-olefin copolymer elastomer, and (c) 20 weight % or less of an inorganic filler, components in the components (a) and (b), which are soluble in p-xylene at a room temperature, having a number-average molecular weight of 4.times.10.sup.4 or more and a weight-average molecular weight of 20.times.10.sup.4 or more.

Abstract: A resin composition having excellent paint coatability containing (a) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, (b) 20-40 weight % of an ethylene-.alpha.-olefin copolymer elastomer, and (c) 20 weight % or less of an inorganic filler, components in the components (a) and (b), which are soluble in p-xylene at a room temperature, having a number-average molecular weight of 4.times.10.sup.4 or more and a weight-average molecular weight of 20.times.10.sup.4 or more.

Abstract: A thermoplastic polymer composition comprising: (i) 100 parts by weight of a thermoplastic polymer component which comprises an ethylene-propylene rubber, an ethylene copolymer and a propylene polymer (including an ethylene-propylene block copolymer), and (ii) 0 to 7 parts by weight of talc, the thermoplastic polymer component being composed of, according to fractionation using o-dichlorobenzene as a solvent, component (A) which is a component soluble in the solvent at 40.degree. C., component (B) which is a component insoluble in the solvent at 40.degree. C. but soluble at 110.degree. C., and component (C) which is a component insoluble in the solvent even at 110.degree. C. in such a proportion that the total amount of the components (A) and (B) is from 50 to 70 parts by weight, the weight ratio of the component (A) to the component (B) being from 0.5 to 1.5, and the amount of the component (C) is from 50 to 30 parts by weight.

Abstract: A polypropylene resin composition comprising:(A) 45 to 70% by weight of an ethylene-propylene block copolymer synthesized under the process comprising the steps of;(a) polymerizing propylene with a Ziegler-Natta catalyst to obtain a highly crystalline polypropylene that contain not less than 97% by weight of a fraction insoluble in boiling n-heptane, and(b) copolymerizing ethylene with the polypropylene (a), and which(a) contains 0.5 to 10% by weight of ethylene,(b) contains 5 to 20% by weight of a fraction being soluble in p-xylene at room temperature and having an intrinsic viscosity value of not less than 2 (measured in decalin at 135.degree. C.),(c) has a melt-flow index value of 30 to 100 g/10 min., and,(d) has a value of flexural modulus of not less than 18,000 kg/cm.sup.2,(B) 10 to 20% by weight of an amorphous ethylene-propylene copolymer having(a) an ethylene content of 70 to 90% by weight,(b) a Mooney viscosity value (ML.sub.1+4 at 100.degree. C.) of 5 to 70,(C) 5 to 15% by weight of an ethylene-.

Abstract: A thermoplastic polymer composition comprising: (i) 100 parts by weight of a thermoplastic polymer component which comprises an ethylene-propylene rubber, an ethylene copolymer and a propylene polymer (including an ethylene-propylene block copolymer), and (ii) 7 to 25 parts by weight of talc, the thermoplastic polymer component being composed of, according to fractionation using o-dichlorobenzene as a solvent, component (A) which is a component soluble in the solvent at 40.degree. C., component (B) which is a component insoluble in the solvent at 40.degree. C. but soluble at 110.degree. C., and component (C) which is a component insoluble in the solvent even at 110.degree. C. in such a proportion that the total amount of the components (A) and (B) is from 50 to 70 parts by weight, the weight ratio of the component (A) to the component (B) being from 0.5 to 1.5, and the amount of the component (C) is from 50 to 30 parts by weight; the composition having a flexural modulus of 10,000 to 20,000 kg/cm.sup.2.

Abstract: The polypropylene resin composition of the present invention comprises specific proportions of a crystalline ethylene-propylene block copolymer, an hydrogenated block copolymer, an amorphous ethylene-propylene copolymer, surface-treated talc, fibrous magnesium oxysulfate of granular form and a metal soap. This resin composition is well balanced in rigidity and impact resistance, has good mar resistance, and can be preferably used in large-sized parts for automobiles, particularly instrument panels for automobiles.

Abstract: A process for preparing a polyamide composite material comprising (1) contacting a layered silicate having a cation exchange capacity of 50 to 200 milliequivalents/100 g with an organic cation of a lactam which is a swelling agent in a dispersing medium, thereby obtaining a composite having the organic cation of the lactam adsorbed onto the layered silicate, and mixing the composite with a polyamide monomer; or (2) mixing a layered silicate having a cation exchange capacity of 50 to 200 milliequivalents/100 g with a compound which becomes a swelling agent through the action of an acid, a polyamide monomer and acid with pKa value of 0 to 3 in a dispersing medium. The mixture containing the polyamide monomer is polymerized to prepare the polyamide composite material.

Abstract: A polypropylene thermoplastic resin composition comprising (a) a modified crystalline polypropylene of a crystalline polypropylene comprising said modified crystalline polypropylene and (b) a modified polyamide obtained by partially or wholly grafting a polyamide with a clay mineral. A polypropylene thermoplastic resin composition comprising, in addition to the above polypropylene thermoplastic resin composition comprising the components (a) and (b), one or any combination of the following components (c), (d) and (e): (c) an ethylene-.alpha.-olefin copolymer rubber or a modified ethylene-.alpha.-olefin copolymer rubber, (d) a block copolymer between a monovinyl-substituted aromatic hydrocarbon and a conjugated diene, a hydrogenation product of said block copolymer, or a modification product of said block copolymer, and (e) an inorganic filler.

Abstract: Disclosed is a polyamide resin composition comprising: (A) at least one of the group consisting of a polyamide resin and a resin composition containing a polyamide resin; (B) a layered silicate uniformly dispersed in the above component (A); and at least one selected from the group consisting of (C) an impact resistance improving material and (D) a polyphenylene ether type resin. The resin composition of this invention has excellent moldability, and the molded product of the resin composition has excellent heat resistance, rigidity and impact resistance.

Abstract: A resin composition comprising 20-77 wt. % of polyolefin (A), 20-77 wt. % of polyphenylene ether resin (B), 2-50 wt. % of polymer (C) combining alkenyl aromatic comound polymerization chain and aliphatic hydrocarbon chain in the same molecule, and 1-25 wt. % of ester group containing ethylene copolymer (D).

Abstract: A modified polyolefin-polyester graft copolymer includes (a) 10-90 parts by weight of a polyester having an intrinsic viscosity [.eta.] of 0.30-1.20 and an end carboxyl group content of 15-200 milliequivalent/kg, and (b) 90-10 parts by weight of a modified polyolefin having 0.2-5 mol % of an epoxy group or carboxyl group content and a weight-average molecular weight of 8,000-140,000.A thermoplastic resin composition includes (a) 5-95 weight % of an aromatic polycarbonate, (b) 95-5 weight % of a polyolefin, and (c) 1-30 parts by weight, per 100 parts by weight of (a)+(b), of the graft copolymer.

Abstract: Disclosed is a polyamide composite material comprising (A) 100 parts by weight of a polyamide resin and (B) 0.05 to 30 parts by weight of a layered silicate uniformly dispersed in the component (A), wherein the reaction ratio of the components (A) and (B) is 60% or less. Disclosed is also a method for preparing a polyamide composite material comprising making a composite in which a layered silicate, with a cation exchange capacity of 50 to 200 milliequivalents/100 g, is in the swelling condition in a dispersion medium; and mixing the composite with a polyamide resin.

Abstract: A polypropylene thermoplastic resin composition comprising (a) a modified crystalline polypropylene of a crystalline polypropylene comprising said modified crystalline polypropylene and (b) a modified polyamide obtained by partially or wholly grafting a polyamide with a clay mineral. A polypropylene thermoplastic resin composition comprising, in addition to the above polypropylene thermoplastic resin composition comprising the components (a) and (b), one or any combination of the following components (c), (d) and (e): (c) an ethylene-.alpha.-olefin copolymer rubber or a modified ethylene-.alpha.-olefin copolymer rubber, (d) a block copolymer between a monovinyl-substituted aromatic hydrocarbon and a conjugated diene, a hydrogenation product of said block copolymer, or a modification product of said block copolymer, and (e) an inorganic filler.

Abstract: The polypropylene-based composite resin composition of the invention, which can be molded into a shaped article having excellent surface hardness and impact strength at low temperatures and usable as a shell plate member of automobiles, comprises (a) a polypropylene resin as the matrix phase, (b) particles of rubber-reinforced styrene-based resin as the dispersed phase having a specified area-average particle diameter, of which the rubber particles having a specified area-average particle diameter forms a "salami" structure as dispersed in the styrene-based resin, and (c) a layer of a compatibility improver, such as a styrene-based thermoplastic elastomer, on the surface of the particles of the rubber-reinforced styrene-based resin in a specified thickness.

Abstract: A thermoplastic resin composition having well-balanced properties which comprises 95-5 weight % of polycarbonate, 5-95 weight % of polyolefin and a particular combination of additional components selected from a styrene-ethylene.propylene copolymer, a styrene-ethylene. butyrene-styrene block copolymer, an AES resin, a styrene-olefin block copolymer, an unsaturated carboxylic acid-modified polyolefin, polybutylene terephthalate, a styrene-maleic anhydride copolymer, an oxazoline ring-containing styrene copolymer a saponified olefin-vinyl ester copolymer and an epoxy group-containing styrene copolymer.

Abstract: The polypropylene resin composition of the present invention can be obtained by melt mixing:(a) a modified polypropylene obtained by grafting a crystalline propylene-ethylene block copolymer with an unsaturated carboxylic acid, or a crystalline polypropylene containing the modified polypropylene,(b) a polyamide, and(c) a modified ethylene-.alpha.-olefin copolymer rubber obtained by grafting an ethylene-.alpha.olefin copolymer rubber with an unsaturated carboxylic acid. This composition is superior in low temperature impact resistance, rigidity, heat resistance and oil resistance.