Abstract: A thermoplastic propylene resin composition of the present invention is obtained by blending an epoxy group containing copolymer (G) and a rubber-like material (H) and/or a modified rubber-like material (I) with a resin omposition composed of a polyamide resin (F) and a polypropylene type resin (E).The thermoplastic propylene resin composition can easily be processed into molded products, films or sheets by injection molding, extrusion molding or the like, giving products which have a good balance in various physical properties and a uniform and smooth appearance. It is suitable for purposes in which especially high heat resistance, impact resistance and low-temperature impact resistance are required.

Abstract: A thermoplastic propylene resin composition of the present invention is obtained by blending a polyamide resin (F), an epoxy group containing copolymer (G) with a graft resin composition (J) obtained by graft copolymerizing an unsaturated carboxylic acid or a derivative thereof onto a mixture of polypropylene (C) and a rubber-like material (H) wherein the content of the polyamide resin (F) in the thermoplastic propylene composition is less than 60% by weight.These thermoplastic propylene resin compositions can easily be processed into molded products, films or sheets by injection molding, extrusion molding or the like, giving products which have a good balance in various physical properties and a uniform and smooth appearance. They are suitable for purposes in which especially high heat resistance, impact resistance and low-temperature impact resistance are required.

Abstract: A thermoplastic elastomer composition superior in moldability and appearance, little in anisotropy of mechanical properties, especially, tensile strength and retaining low temperature impact strength, is obtained by previously melt-kneading an intermediate composition comprising (a) 100 parts by weight of a selectively hydrogenated block copolymer which has at least two mono-alkenyl or mono-alkenylidene aromatic hydrocarbon polymer blocks A having a number-average molecular weight of 25,000-35,000 and at least one partially or completely hydrogenated aliphatic conjugated diene hydrocarbon polymer block B having a number-average molecular weight of 100,000-150,000, (b) 50-150 parts by weight of an extender oil and (c) 0-50 parts by weight of polypropylene I, then adding, to the kneaded intermediate composition, (d) polypropylene II containing at least 35% by weight of a propylene-ethylene block copolymer having a melt flow rate of 10-30 g/10 min.

Abstract: A pigment master batch suitable for filler-containing polypropylene compositions is provided. This pigment master batch comprises 100 parts by weight of a propylene homopolymer having a melt flow rate of at least 10 g/10 min. and 30-200 parts by weight of a processed pigment prepared by using a metallic salt of a fatty acid, a polyethylene wax or a polypropylene wax as a dispersion medium for pigment. A filler-containing polypropylone composition in which the above pigment master batch is incorporated is superior in dispersibility and balance of properties and can easily be processed into molded articles which are superior in balance of properties such as heat resistance, impact resistance and rigidity.

Abstract: The polypropylene composition of the present invention comprises:a blend of a resin composition composed of a specific polypropylene type resin (C) and at least one saturated polyester resin(D),an epoxy group containing copolymer (e) andat least one rubber selected from the group consisting of an ethylenic copolymer rubber (F), a modified ethylenic copolymer rubber (G) obtained by graft copolymerizing an unsaturated carboxylic acid or a derivative thereof onto an ethylenic copolymer rubber and a modified ethylenic copolymer rubber (H) obtained by graft copolymerizing an unsaturated carboxylic acid or derivative thereof and an unsaturated aromatic monomer onto an ethylenic copolymer rubber, and a basic compound (I) optionally added as a reaction accelerator.

Abstract: The modified polypropylene resin composition of the present invention comprises a blend ofa resin composition composed of polypropylene type resin (C) selected from the group consisting of a modified polypropylene (A) obtained by graft copolymerizing an unsaturated carboxylic acid or a derivative thereof and an unsaturated aromatic monomer onto a polypropylene, and modified polypropylene (A)/polypropylene (B) composition, anda saturated polyester resin (D),an epoxy group containing copolymer (E), anda basic compound (F) optionally added as a reaction accelerator.The modified polypropylene resin composition according to the present invention is not only good in molding processability but also markedly effective in that it can give molded products much superior in physical properties to those obtained from individual polymers constituting the thermoplastic resin composition.

Abstract: The thermoplastic olefin resin composition of the present invention comprises: a resin composition consisting of at least one modified polypropylene and a polyglutarimide, and an epoxy group containing copolymer. The modified polypropylene is one in which at least an unsaturated carboxylic acid or a derivative thereof is graft copolymerized onto a polypropylene. This composition has good mold processability and can be used to produce molded products which are superior in mechanical properties to those obtained from the individual polymers of the composition.

Abstract: The present invention provides a novel method for producing a filler-containing colored thermoplastic resin composition superior in pigment dispersibility and impact resistance. This method includes melt kneading firstly at least a part of components of resin consisting of a thermoplastic resin (A) and/or a thermoplastic resin composition (B) with fillers (C), adding remainder of the resin, if any, with a pigment (E), and then further carrying out continuous melt-kneading.

Abstract: There is disclosed a thermoplastic resin composition comprising a blend of100 parts by weight of a resin composition composed of 1 to 99% by weight of a polypropylene type resin (C) selected from the group consisting of a modified polypropylene (A) obtained by graft copolymerizing an unsaturated carboxylic acid or a derivative thereof and an unsaturated aromatic monomer onto polypropylene, and a composition composed of the modified polypropylene (A) and a polypropylene (B), and 99 to 1% by weight of at least one saturated polyester resin (D),0.1 to 300 parts by weight of an epoxy group containing copolymer (E),0.

Abstract: There is provided a thermoplastic elastomer composition having excellent surface processabilities such as adhesion, paintability and printability together with impact resistance. This composition comprises (A) 20-80% by weight of a polypropylene resin, (B) 5-38% by weight of an ethylene copolymer having 82-98.7 mol % of an ethylene unit, 1-15 mol % of an ester unit selected from alkyl acrylate and methacrylate having an alkyl group of 1-8 carbon atoms and 0.3-3 mol % of an unsaturated dicarboxylic acid anhydride unit and (C) 5-70% by weight of ethylene-propylene and/or ethylene-propylene-non-conjugated diene copolymer rubber which contain 50-85 mol % of an ethylene unit and have a Mooney viscosity at 100.degree. C. of 20-100 and an iodine value of 20 or less.

Abstract: A thermoplastic elastomer composition which is excellent in melt-flowability and is able to afford injection molded articles superior in appearance is provided, which is a mixture comprising (A) 20-50 parts by weight of an olefinic copolymer rubber, (B) 50-80 parts by weight of an olefinic plastic having a ratio of melt index M.sub.1 /M.sub.0 of 2-50 wherein M.sub.0 is a melt index of the plastic before subjected to thermal decomposition with organic peroxide and M.sub.1 is a melt index of the plastic after subjected to the thermal decomposition with the organic peroxide, sum of (A) and (B) being 100 parts by weight, (C) 5-25 parts by weight of a mineral oil and (D) 0.1-3 parts by weight of a bismaleimide compound, said mixture being dynamically heat treated with (E) an organic peroxide after bismaleimide compound (D) is homogeneously dispersed in the mixture.

Abstract: A process for producing a filler-containing polypropylene resin composition is disclosed. The composition comprises (a) from 27 to 87% by weight of a polypropylene resin, (b) from 3 to 15% by weight of a modified polypropylene resin containing from 0.1 to 3 mol% of an unsaturated dicarboxylic acid anhydride repeating unit, (c) from 5 to 30% by weight of an ethylene copolymer composed of from 82 to 98.7 mol% of an ethylene repeating unit, from 1 to 15 mol% of an ester repeating unit selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof, and from 0.3 to 3 mol% of an unsaturated dicarboxylic acid anhydride repeating unit, and (d) from 5 to 40% by weight of a filler. The process comprises melt-mixing the components (a), (b), and (d) and then melt-mixing the resulting mixture with the component (c).

Abstract: A filler-containing polypropylene resin composition and a process for producing the same are disclosed. The composition comprises (a) from 27 to 87% by weight of a polypropylene resin, (b) from 3 to 15% by weight of a modified polypropylene resin containing from 0.1 to 3 mol % of an unsaturated dicarboxylic acid anhydride repeating unit, (c) from 5 to 30% by weight of an ethylene copolymer composed of from 82 to 98.7 mol % of an ethylene repeating unit, from 1 to 15 mol % of an ester repeating unit selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof, and from 0.3 to 3 mol % of an unsaturated dicarboxylic acid anhydride repeating unit, and (d) from 5 to 40% by weight of a filler. The process comprises melt-mixing the components (a), (b) and (d) and then melt-mixing the resulting mixture with the component (c).

Abstract: A filler-containing polypropylene resin composition is disclosed, comprising (a) from 30 to 90% by weight of a polypropylene resin, (b) from 2.5 to 38% by weight of an ethylene copolymer composed of from 82 to 98.7 mol % of ethylene, from 1 to 15 mol % of an ester selected from alkyl acrylate and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof and from 0.3 to 3 mol % of an unsaturated dicarboxylic acid anhydride, and (c) from 5 to 50% by weight of a filler. Molded products obtained from the composition have improved finishing properties, such as adhesion, coating properties, printability, and the like.

Abstract: A resin composition is provided which comprises a crystalline propylene-ethylene copolymer resin mixed with mica having a specified average particle diameter and particle size distribution or a rubber-like material so that it shows an excellent balance between rigidity and impact strength and an excellent thermal resistance and provides an excellent appearance when formed in products. In a preferred embodiment, the polypropylene resin composition comprises 50 to 97% by weight of a crystalline propylene-ethylene copolymer resin, 0 to 20% by weight of a rubber-like material, and 3 to 50% by weight of mica having an average particle diameter determined by photo extinction sedimentation method of 0.5 to 4.5.mu. and a particle size distribution of 95% or more by weight for 10.mu. or less, 60% or more by weight for 5.mu. or less, and 10 to 80% by weight for 1.mu. or less.

Abstract: A particulate polyolefin expansion molding material is disclosed. The material is comprised of a particulate polyolefin having a bulk density of 0.45 g/cc or more and a mean particle size of 150 to 2,000.mu., having provided on the surface thereof at least one layer comprising an expanding agent, a binder and a filler. The material can be used in producing expansion molded articles without first forming the material into pellets as is conventionally done.

Abstract: Various resin products having beautiful pearl-like pattern or luster and excellent mechanical strength such as impact strength and hinging properties are produced by molding a mixture of styrene-butadiene block copolymer containing 10 to 35 wt % butadiene and 65 to 90 wt % styrene, showing resinous properties, and having a specific block form and crystalline polypropylene (content of the former copolymer: 25 to 95 wt %).

Abstract: Resin compositions excellent in both flame retardation and weather durability, comprising (1) a styrene resin, (2) a halogen-containing flame retarder such as decabromodiphenyl ether and (3) an inorganic hydrate compound such as diatomaceous earth or a magnesium compound such as magnesium hydroxide and oxide.

Abstract: A rubber-modified polystyrene resin composition consisting essentially of a rubber-modified polystyrene and a transparent, resinous styrene-butadiene block copolymer containing 65 to 95% by weight of styrene and 5 to 35% by weight of butadiene. This resin composition is excellent in impact strength, elongation, flexural stress clouding, hinging endurance, and surface gloss.

Abstract: A novel thermoplastic resin composition consisting essentially of polystyrene and a styrene-butadiene block copolymer. This resin composition is transparent, is excellent in mechanical properties, particularly in elongation, impact strength, and stiffness, is not liable to become cloudy on being bent, and is favorable in hinging endurance as well as in thermal resistance.