Abstract: This heterophasic propylene polymerization material comprises a propylene copolymer (I), an ethylene-?-olefin copolymer (II-1), and an ethylene-?-olefin copolymer (II-2), wherein the contained amount of a monomeric unit derived from an olefin other than propylene in the propylene copolymer (I) is not less than 0.05 wt % but less than 10 wt %, the limiting viscosity [?]I of the propylene copolymer (I) is less than 1.50 dL/g, the contained amount of a monomeric unit derived from ethylene in the ethylene-?-olefin copolymer (II-2) is 10-30 wt %, and the limiting viscosity of the ethylene-?-olefin copolymer (II-2) is higher than that of the ethylene-?-olefin copolymer (II-1).

Abstract: A propylene-based resin composition containing components (A), (B), and (C) is provided. The content of (A) is 50 to 89 parts by weight, the content of (B) is 11 to 50 parts by weight, and the content of (C) is 0.05 to 1 part by weight, based on 100 parts by weight of the total of (A) and (B). Component (A) is a propylene-based polymer, component (B) is a filler, and component (C) is a bis(3,4-dialkylbenzylidene)sorbitol represented by the formula (1) In formula (1), R1 and R2 each independently represent an alkyl group having 1 to 4 carbon atoms. It is possible to produce a molded article which has high rigidity and in which the linear expansion coefficients in the MD and the TD are small from the composition.

Abstract: This heterophasic propylene polymerization material comprises a propylene copolymer (I), an ethylene-?-olefin copolymer (II-1), and an ethylene-?-olefin copolymer (II-2), wherein the contained amount of a monomeric unit derived from an olefin other than propylene in the propylene copolymer (I) is not less than 0.05 wt % but less than 10 wt %, the limiting viscosity [?]1 of the propylene copolymer (I) is less than 1.50 dL/g, the contained amount of a monomeric unit derived from ethylene in the ethylene-?-olefin copolymer (II-2) is 10-30 wt %, and the limiting viscosity of the ethylene-?-olefin copolymer (II-2) is higher than that of the ethylene-?-olefin copolymer (II-1).

Abstract: A propylene-based resin composition containing components (A), (B), and (C) is provided. The content of (A) is 50 to 89 parts by weight, the content of (B) is 11 to 50 parts by weight, and the content of (C) is 0.05 to 1 part by weight, based on 100 parts by weight of the total of (A) and (B). Component (A) is a propylene-based polymer, component (B) is a filler, and component (C) is a bis(3,4-dialkylbenzylidene)sorbitol represented by the formula (1) In formula (1), R1 and R2 each independently represent an alkyl group having 1 to 4 carbon atoms. It is possible to produce a molded article which has high rigidity and in which the linear expansion coefficients in the MD and the TD are small from the composition.

Abstract: A polypropylene-based resin composition capable of affording a molded article superior in tensile elongation at break includes a polypropylene resin (A), an ethylene-?-olefin copolymer (B) having a density of 0.865 to 0.890 g/cm3, an ethylene-?-olefin copolymer (C) having a density of 0.855 to 0.859 g/cm3, and an inorganic filler (D), wherein the content of the polypropylene resin (A) is 49 to 76% by weight, the content of the inorganic filler (D) is 9 to 22% by weight, the sum total of the contents of the ethylene-?-olefin copolymer (B) and the ethylene-?-olefin copolymer (C) is 15 to 29% by weight. The sum total of the contents of (A), (B), (C), and (D) is taken as 100% by weight, and the content of the ethylene-?-olefin copolymer (B), x % by weight, and the content of the ethylene-?-olefin copolymer (C), y % by weight, satisfy the formula: 0.07?x/(x+y)?0.41.

Abstract: A polypropylene-based resin composition capable of affording a molded article superior in tensile elongation at break includes a polypropylene resin (A), an ethylene-?-olefin copolymer (B) having a density of 0.865 to 0.890 g/cm3, an ethylene-?-olefin copolymer (C) having a density of 0.855 to 0.859 g/cm3, and an inorganic filler (D), wherein the content of the polypropylene resin (A) is 49 to 76% by weight, the content of the inorganic filler (D) is 9 to 22% by weight, the sum total of the contents of the ethylene-?-olefin copolymer (B) and the ethylene-?-olefin copolymer (C) is 15 to 29% by weight. The sum total of the contents of (A), (B), (C), and (D) is taken as 100% by weight, and the content of the ethylene-?-olefin copolymer (B), x % by weight, and the content of the ethylene-?-olefin copolymer (C), y % by weight, satisfy the formula: 0.07?x/(x+y)?0.41.

Abstract: Provided are a polypropylene resin composition which does not produce very much mold staining at the time of molding, which is excellent in antistatic property, weather resistance and molding processability, which has good balance between high rigidity and high 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 98 to 50 parts by weight of a specified polypropylene resin (A), 1 to 25 parts by weight of a specified ethylene-?-olefin copolymer rubber (B), 1 to 25 parts by weight of an inorganic filler (C), 0.02 to 1 part by weight of a hindered amine light stabilizer (D) which satisfies specified requirements (a), (b) and (c), and 0.

Abstract: The polypropylene resin composition is disclosed which includes 50-94% by weight of a polypropylene resin having a specific structure, 1-25% by weight of an ethylene-?-olefin copolymer rubber composed of an ethylene-?-olefin (C4-20) copolymer rubber having a density of 0.85-0.91 g/cm3 and an MFR of 0.9-20 g/10 min and/or an ethylene-?-olefin (C5-20) copolymer rubber having a density of 0.85-0.91 g/cm3 and MFR of not less than 0.01 but less than 0.9 g/10 min, and 5-25% by weight of an inorganic filler.

Abstract: Provided are a polypropylene resin composition which does not produce very much mold staining at the time of molding, which is excellent in antistatic property, weather resistance and molding processability, which has good balance between high rigidity and high 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 98 to 50 parts by weight of a specified polypropylene resin (A), 1 to 25 parts by weight of a specified ethylene-?-olefin copolymer rubber (B), 1 to 25 parts by weight of an inorganic filler (C), 0.02 to 1 part by weight of a hindered amine light stabilizer (D) which satisfies specified requirements (a), (b) and (c), and 0.

Abstract: Disclosed is a method for producing a modified propylene polymer, the method comprising heating a mixture of 100 parts by weight of a propylene polymer (A) defined below and from 0.1 to 50 parts by weight of an ethylenically unsaturated bond-containing monomer (B) in the presence of from 0.01 to 20 parts by weight of an organic peroxide (C); propylene polymer (A) being a propylene polymer composed of from 0.5 to 90% by weight of a propylene polymer component (A1) having an intrinsic viscosity [?], as measured in tetralin at 135° C., of from 5 dl/g to 15 dl/g and from 10 to 99.5% by weight of a propylene polymer component (A2) having an intrinsic viscosity [?], as measured in tetralin at 135° C., of not less than 0.1 dl/g but less than 5 dl/g.

Abstract: Disclosed is a polypropylene resin composition including from 50 to 94% by weight of polypropylene resin, from 1 to 25% by weight of ethylene-?-olefin copolymer rubber including ethylene units and units of C4-12 ?-olefin, the copolymer having a density of 0.850-0.870 g/cm3 and an MFR of 0.05-1 g/10 min, and from 5 to 25% by weight of inorganic filler, wherein the polypropylene resin is a propylene-ethylene block copolymer satisfying given requirements or a polymer mixture of the propylene-ethylene block copolymer and a propylene homopolymer. Molded articles made from the composition have good balance between rigidity and impact resistance and have good appearance.

Abstract: Provided are a polypropylene resin composition that excels not only in fluidity but also in balance between rigidity and impact resistance, and that can, when being molded into an automotive injection molded article, provide an automotive injection molded article excelling in weld appearance and flow mark appearance, and an automotive injection molded article made thereof. There is provided a polypropylene resin composition comprising 50 to 65 wt % of propylene-ethylene block copolymer (A-1) containing crystalline propylene homopolymer segment and propylene-ethylene random copolymer segment of 4.0 to 5.5 dl/g in intrinsic viscosity; 1 to 10 wt % of ethylene-?-olefin copolymer rubber (B) of 0.05 to 1 g/10 min in melt flow rate; 8 to 18 wt % of ethylene-?-olefin copolymer rubber (C) of 2 to 20 g/10 min in melt flow rate; and 18 to 25 wt % of inorganic filler (D), the sum of the rubbers (B) and (C) being 17 to 25 wt %. Further, an automotive injection molded article of the composition is provided.

Abstract: Disclosed is a polypropylene resin composition including from 50 to 93% by weight of polypropylene resin including propylene-ethylene block copolymer satisfying given requirements, from 1 to 25% by weight of ethylene-?-olefin copolymer rubber made up of ethylene units and units of C4-12 ?-olefin having a density of 0.850 to 0.870 g/cm3 and an MFR of 0.05 to 1 g/10 min, from 1 to 25% by weight of another type of ethylene-?-olefin copolymer rubber made up of ethylene units and units of C4-12 ?-olefin having a density of 0.850 to 0.870 g/cm2 and an MFR of 2 to 20 g/10 min, and from 5 to 25% by weight of inorganic filler. Molded articles made from the composition have good balance between rigidity and impact resistance and have good appearance.

Abstract: The polypropylene resin composition is disclosed which includes 50-94% by weight of a polypropylene resin having a specific structure, 1-25% by weight of an ethylene-?-olefin copolymer rubber composed of an ethylene-?-olefin (C4-20) copolymer rubber having a density of 0.85-0.91 g/cm3 and an MFR of 0.9-20 g/10 min and/or an ethylene-?-olefin (C5-20) copolymer rubber having a density of 0.85-0.91 g/cm3 and MFR of not less than 0.01 but less than 0.9 g/10 min, and 5-25% by weight of an inorganic filler.

Abstract: Disclosed is a propylene-based polymer including from 51 to 75% by weight of a propylene-ethylene random copolymer component (A) having an intrinsic viscosity [?]A, measured in tetralin at 135° C., of 5 dl/g or more and an ethylene content of not less than 8% by weight but less than 20% by weight, and from 25 to 49% by weight of a propylene-based polymer component (B) obtained by polymerizing monomers mainly including propylene, the component having an intrinsic viscosity [?]B, measured in tetralin at 135° C., of 1.2 dl/g or less, wherein said amounts of the components (A) and (B) are each based on the combined weight of these components.

Abstract: A polypropylene resin composition comprises (A) (a-1) a specific crystalline propylene/ethylene block copolymer or (a-3) a polymer mixture comprising the (a-1) and (a-2) a specific crystalline propylene-homopolymer in specific ratio, in an amount of 5 to 56% by weight, (B) a hydroxyl group-containing polypropylene having an intrinsic viscosity [?] of 0.8 to 2.0 dl/g and a melting point of 150 to 168° C., in an amount of 10 to 45% by weight, (C) a copolymer rubber of ethylene and an ?-olefin having a melt flow rate (ASTM D-1238, 230° C., load of 2160 g) of 0.

Abstract: Disclosed is a polypropylene resin composition including from 50 to 94% by weight of polypropylene resin, from 1 to 25% by weight of ethylene-?-olefin copolymer rubber including ethylene units and units of C4-12 ?-olefin, the copolymer having a density of 0.850-0.870 g/cm3 and an MFR of 0.05-1 g/10 min, and from 5 to 25% by weight of inorganic filler, wherein the polypropylene resin is a propylene-ethylene block copolymer satisfying given requirements or a polymer mixture of the propylene-ethylene block copolymer and a propylene homopolymer. Molded articles made from the composition have good balance between rigidity and impact resistance and have good appearance.

Abstract: Disclosed is a polypropylene resin composition including from 50 to 93% by weight of polypropylene resin including propylene-ethylene block copolymer satisfying given requirements, from 1 to 25% by weight of ethylene-?-olefin copolymer rubber made up of ethylene units and units of C4-12 ?-olefin having a density of 0.850 to 0.870 g/cm3 and an MFR of 0.05 to 1 g/10 min, from 1 to 25% by weight of another type of ethylene-?-olefin copolymer rubber made up of ethylene units and units of C4-12 ?-olefin having a density of 0.850 to 0.870 g/cm2 and an MFR of 2 to 20 g/10 min, and from 5 to 25% by weight of inorganic filler. Molded articles made from the composition have good balance between rigidity and impact resistance and have good appearance.

Abstract: Disclosed is a method for producing a modified propylene polymer, the method comprising heating a mixture of 100 parts by weight of a propylene polymer (A) defined below and from 0.1 to 50 parts by weight of an ethylenically unsaturated bond-containing monomer (B) in the presence of from 0.01 to 20 parts by weight of an organic peroxide (C); propylene polymer (A) being a propylene polymer composed of from 0.5 to 90% by weight of a propylene polymer component (A1) having an intrinsic viscosity [?], as measured in tetralin at 135° C., of from 5 dl/g to 15 dl/g and from 10 to 99.5% by weight of a propylene polymer component (A2) having an intrinsic viscosity [?], as measured in tetralin at 135° C., of not less than 0.1 dl/g but less than 5 dl/g.

Abstract: Disclosed is a polypropylene resin composition which includes a polypropylene resin, an ethylene-?-olefin copolymer rubber, and an inorganic filler, wherein the polypropylene resin includes a propylene-ethylene block copolymer composed of a polypropylene portion and a propylene-ethylene random copolymer portion, the weight ratio of the propylene units to the ethylene units in the propylene-ethylene random copolymer portion of the block copolymer is 75/25 to 35/65, the propylene-ethylene random copolymer portion of the block copolymer includes a first random copolymer component having an intrinsic viscosity of not less than 1.5 dl/g but less than 4 dl/g and an ethylene content of not less than 20% by weight but less than 50% by weight and a second random copolymer component having an intrinsic viscosity of not less than 0.5 dl/g but less than 3 dl/g and an ethylene content of not less than 50% by weight and not more than 80% by weight.