Abstract: Disclosed is a polypropylene resin composition including: 100 parts by weight of (A) a propylene-based block copolymer including polymer components (I) and (II), wherein the polymer component (I) is a propylene polymer having an intrinsic viscosity [?]I of 0.1-5 dl/g, the polymer component (II) is a propylene polymer comprising propylene units and units of at least one comonomer selected from the group consisting of ethylene and ?-olefins having 4-12 carbon atoms and having an intrinsic viscosity [?]II of from 1-20 dl/g and the content of the polymer component (II) is 1-70% by weight; and 0.001-5 parts by weight of (B) a nucleating agent composed of particles having an average particle diameter, as measured by the laser diffraction method, of 0.01-3 mm wherein particles having particle diameters of not less than 10 mm account for less than 5% by weight of all the particles of the nucleating agent.

Abstract: Provided are a polypropylene resin composition which produces only a little mold staining at the time of molding, which is excellent in the stability against light and the molding processability, which has good balance between high rigidity and impact resistance, and which can give a molded article excellent in flow mark appearance and weld appearance when being processed into a molded article, and a molded article produced therefrom. The polypropylene resin composition of the present invention contains 99 to 60 parts by weight of propylene-based polymer (A), 1 to 40 parts by weight of inorganic filler (B) having an average particle diameter of 0.01 to 100 ?m, and 0.05 to 5 parts by weight, per 100 parts by weight of the resin composition (I), of an hindered amine-type light stabilizer (C) which satisfies the specified requirements (a), (b) and (c), provided that the combined amount of the propylene-based polymer (A) and the inorganic filler (B) is 100 parts by weight.

Abstract: A polypropylene resin composition, comprising (A) 51 to 99% by weight of a propylene polymer having a melt flow rate of 10 to 200 g/10 minutes, and containing 0.1 to 40% by weight of an ethylene unit and/or ?-olefin unit having 4 to 10 carbon atoms and 60 to 99.9% by weight of a propylene unit, (B) 1 to 49% by weight of an ethylene polymer having density of 0.85 to 0.93 g/cm3, and (C) 0.001 to 5 parts by weight of an amide compound as a nucleating agent.

Abstract: A polypropylene resin composition comprising (a) 100 parts by weight of a resin composition, which contains 51 to 99% by weight of a propylene polymer and 1 to 49% by weight of an ethylene polymer having a density of 0.85 to 0.93 g/cm3, and (b) 0.001 to 0.5 part by weight of a metal salt defined by a specific chemical formula; and a process for producing such a polypropylene resin composition, comprising the steps of (1) mixing 1 to 100 parts by weight of the metal salt with 100 parts by weight of the propylene polymer and/or the ethylene polymer, thereby producing a master batch, and (2) mixing the master batch with a mixture containing the propylene polymer and the ethylene polymer.

Abstract: A polypropylene resin composition, comprising (A) 51 to 99% by weight of a propylene polymer having a melt flow rate of 10 to 200 g/10 minutes, and containing 0.1 to 40% by weight of an ethylene unit and/or ?-olefin unit having 4 to 10 carbon atoms and 60 to 99.9% by weight of a propylene unit, (B) 1 to 49% by weight of an ethylene polymer having density of 0.85 to 0.93 g/cm3, and (C) 0.001 to 5 parts by weight of an amide compound as a nucleating agent.

Abstract: An object of the present invention is to provide a polypropylene-based resin composition which is excellent in mechanical characteristics and molding processability, and is also capable of suppressing emission of a volatile organic compound. Disclosed is a polypropylene-based resin composition comprising a propylene-based block copolymer (A) which satisfies features (a), (b) and (c) shown below, and a zeolite (B) having a molar ratio SiO2/Al2O3 of 10 to 60 in an amount of 0.01 to 0.

Abstract: A polypropylene resin composition comprising (a) 100 parts by weight of a resin composition, which contains 51 to 99% by weight of a propylene polymer and 1 to 49% by weight of an ethylene polymer having a density of 0.85 to 0.93 g/cm3, and (b) 0.001 to 0.5 part by weight of a metal salt defined by a specific chemical formula; and a process for producing such a polypropylene resin composition, comprising the steps of (1) mixing 1 to 100 parts by weight of the metal salt with 100 parts by weight of the propylene polymer and/or the ethylene polymer, thereby producing a master batch, and (2) mixing the master batch with a mixture containing the propylene polymer and the ethylene polymer.

Abstract: Provided are a polypropylene resin composition which produces only a little mold staining at the time of molding, which is excellent in the stability against light and the molding processability, which has good balance between high rigidity and impact resistance, and which can give a molded article excellent in flow mark appearance and weld appearance when being processed into a molded article, and a molded article produced therefrom. The polypropylene resin composition of the present invention contains 99 to 60 parts by weight of propylene-based polymer (A), 1 to 40 parts by weight of inorganic filler (B) having an average particle diameter of 0.01 to 100 ?m, and 0.05 to 5 parts by weight, per 100 parts by weight of the resin composition (I), of an hindered amine-type light stabilizer (C) which satisfies the specified requirements (a), (b) and (c), provided that the combined amount of the propylene-based polymer (A) and the inorganic filler (B) is 100 parts by weight.

Abstract: There are provided a polypropylene resin composition having a melt flow rate of 5 to 200 g/10 minutes measured at 230° C., and a molded article comprising the same, wherein the polypropylene resin composition does not easily emit a volatile organic compound contained therein, and is superior in its heat stability, light stability and molding processability, and comprises 100 parts by weight of a propylene block copolymer (A), and 0.05 to 5 parts by weight of a hindered amine light stabilizer (B) having (a) a 2,2,6,6-tetramethylpiperidyl group, (b) an acid dissociation constant (pKa) of less than 8, and (c) a rate of decrease in its weight of less than 10% by heating in a nitrogen gas from 25° C. to 300° C. at a temperature increasing rate of 10° C./minute.

Abstract: Disclosed is a composite material comprising: resin (I) comprising 10 to 99% by weight of a crystalline thermoplastic resin which is defined as component (A), and 1 to 90% by weight of a crystalline thermoplastic resin having a crystallization temperature lower than that of component (A) by at least 10° C., which resin is defined as component (B), and 5 to 400 parts by weight, based on 100 parts by weight of the resin (I), of fiber, which is defined as component (C), wherein the contents of the component (A) and the component (B) are each based on a combined content of these two components.

Abstract: An object of the present invention is to provide a polypropylene-based resin composition which is excellent in mechanical characteristics and molding processability, and is also capable of suppressing emission of a volatile organic compound. Disclosed is a polypropylene-based resin composition comprising a propylene-based block copolymer (A) which satisfies features (a), (b) and (c) shown below, and a zeolite (B) having a molar ratio SiO2/Al2O3 of 10 to 60 in an amount of 0.01 to 0.

Abstract: Disclosed is a polyolefin resin composition comprising 100 parts by weight of component (A), 0.001 to 10 parts by weight of component (B) and 0.01 to 100 parts by weight of component (C): component (A): polyolefin resin; component (B): carbon black which satisfies the following requirements (1) and (2): requirement (1): containing a volatile component in an amount of less than 0.2% by weight as measured by the method provided in JIS K6221; requirement (2): containing at least one element selected from the group consisting of iron, nickel, copper, cobalt, aluminum, manganese and vanadium in an amount, based on the weight of the carbon black, of 4 ppm or less; component (C): stabilizer.

Abstract: The object of the present invention is to provide a crystalline thermoplastic polymer composition which exhibits higher stiffness. The present invention relates to a crystalline thermoplastic polymer composition comprising a crystalline thermoplastic polymer and a crystal nucleating agent coated aluminum hydroxide, the amount of the crystal nucleating agent coated aluminum hydroxide being from 1 to 20 parts by mass based on 100 parts by mass of the crystalline thermoplastic polymer, the crystal nucleating agent coated aluminum hydroxide comprising anisotropic shaped aluminum hydroxide particles and a crystal nucleating agent coated on the surface of the anisotropic shaped aluminum hydroxide particles, the crystal nucleating agent coated aluminum hydroxide having a BET specific surface area of 20 to 150 m2/g.

Abstract: A crystalline thermoplastic resin composition containing a crystalline thermoplastic resin, acicular aluminum hydroxide having a BET specific surface area of from 10 m2/g to 100 m2/g and a nucleating agent in which a weight ratio (A/B) of the aluminum hydroxide (A) to the nucleating agent (B) is 40 or less.

Abstract: Disclosed is a polypropylene resin composition comprising (A) 100 parts by weight of polypropylene resin and the following components (B) to (D): (B) from 0.001 to 0.1 part by weight of an inorganic neutralizing agent, (C) from 0.01 to 5 parts by weight of an antioxidant, and (D) from 0.01 to 0.5 part by weight of particles of sodium benzoate having an average particle diameter, as measured by a laser method, of from 0.1 to 3.75 ?m wherein particles having particle diameters of not less than 10 ?m account for less than 15% by weight.

Abstract: Disclosed is a polypropylene resin composition including: 100 parts by weight of (A) a propylene-based block copolymer including polymer components (I) and (II), wherein the polymer component (I) is a propylene polymer having an intrinsic viscosity [?]I of 0.1-5 dl/g, the polymer component (II) is a propylene polymer comprising propylene units and units of at least one comonomer selected from the group consisting of ethylene and ?-olefins having 4-12 carbon atoms and having an intrinsic viscosity [?]II of from 1-20 dl/g and the content of the polymer component (II) is 1-70% by weight; and 0.001-5 parts by weight of (B) a nucleating agent composed of particles having an average particle diameter, as measured by the laser diffraction method, of 0.01-3 mm wherein particles having particle diameters of not less than 10 mm account for less than 5% by weight of all the particles of the nucleating agent.

Abstract: Disclosed is a polyolefin resin composition comprising 100 parts by weight of component (A), 0.001 to 10 parts by weight of component (B) and 0.01 to 100 parts by weight of component (C): component (A): polyolefin resin; component (B): carbon black which satisfies the following requirements (1) and (2): requirement (1): containing a volatile component in an amount of less than 0.2% by weight as measured by the method provided in JIS K6221: requirement (2): containing at least one element selected from the group consisting of iron, nickel, copper, cobalt, aluminum, manganese and vanadium in an amount, based on the weight of the carbon black, of 4 ppm or less; component (C): stabilizer.

Abstract: Disclosed is a composite material comprising: resin (I) comprising 10 to 99% by weight of a crystalline thermoplastic resin which is defined as component (A), and 1 to 90% by weight of a crystalline thermoplastic resin having a crystallization temperature lower than that of component (A) by at least 10° C., which resin is defined as component (B), and 5 to 400 parts by weight, based on 100 parts by weight of the resin (I), of fiber, which is defined as component (C), wherein the contents of the component (A) and the component (B) are each based on a combined content of these two components.

Abstract: Disclosed is a fiber-reinforced polyolefin resin composite containing a polyolefin resin (components (A)), fibers (component (B)) and a heavy metal deactivator (component (C)), the ratio of the weight of component (A) to the weight of component (B), (component (A)/component (B)), being from 20/80 to 95/5, the ratio of the weight of component (C) to the combined weight of component (A) and component (B), (component (C)/[component (A)+component (B)]), being from 0.001/100 to 5/100, wherein in the composite substantially all the component (B) have lengths of 2 mm or more. The composite has an improved durability under circumstances of contact with metal. A molded article obtained from the composite is also disclosed.

Abstract: Disclosed is a fiber-reinforced polyolefin resin composite containing a polyolefin resin (components (A)), fibers (component (B)) and a heavy metal deactivator (component (C)), the ratio of the weight of component (A) to the weight of component (B), (component (A)/component (B)), being from 20/80 to 95/5, the ratio of the weight of component (C) to the combined weight of component (A) and component (B), (component (C)/[component (A)+component (B)]), being from 0.001/100 to 5/100, wherein in the composite substantially all the component (B) have lengths of 2 mm or more. The composite has an improved durability under circumstances of contact with metal. A molded article obtained from the composite is also disclosed.