Abstract: An object of the present invention is to provide a thermoplastic elastomer composition having high molding fluidity, mechanical physical properties, and resistance to wear and providing a good appearance and feeling, and molded products using the same.

Abstract: There is provided a thermoplastic elastomer composition having excellent flexibility, mechanical properties, scratch resistance, abrasion resistance, and low-temperature characteristics. A crosslinked thermoplastic elastomer composition comprising 5 to 70 parts by mass of (C) a hydrogenated product of a block copolymer having at least one conjugated diene monomer unit block and at least one vinyl aromatic monomer unit block, and 20 to 150 parts by mass of (D) an olefin-based resin, based on 100 parts by mass of the total of (A) an ethylene-?-olefin copolymer comprising an ethylene unit and an ?-olefin unit having 3 to 20 carbon atoms, and (B) a copolymer having at least one hydrogenated copolymer block mainly composed of a conjugated diene monomer unit and a vinyl aromatic monomer unit, wherein a mass ratio ((A)/(B)) of the (A) component and the (B) component is from 20/80 to 75/25.

Abstract: An object of the present invention is to provide a thermoplastic elastomer composition having high molding fluidity, mechanical physical properties, and resistance to wear and providing a good appearance and feeling, and molded products using the same.

Abstract: There is provided a thermoplastic elastomer composition having excellent flexibility, mechanical properties, scratch resistance, abrasion resistance, and low-temperature characteristics. A crosslinked thermoplastic elastomer composition comprising 5 to 70 parts by mass of (C) a hydrogenated product of a block copolymer having at least one conjugated diene monomer unit block and at least one vinyl aromatic monomer unit block, and 20 to 150 parts by mass of (D) an olefin-based resin, based on 100 parts by mass of the total of (A) an ethylene-?-olefin copolymer comprising an ethylene unit and an ?-olefin unit having 3 to 20 carbon atoms, and (B) a copolymer having at least one hydrogenated copolymer block mainly composed of a conjugated diene monomer unit and a vinyl aromatic monomer unit, wherein a mass ratio ((A)/(B)) of the (A) component and the (B) component is from 20/80 to 75/25.

Abstract: An elastomer composition obtained by crosslinking 1-99 parts by weight of a crosslinkable rubber-like polymer (A) and 1-99 parts by weight of a polypropylene resin (B) [the total amount of (A) and (B) being 100 parts by weight], where (B) is a crosslinking type polypropylene resin, has a flexural modulus of 100-10000 kgf/cm2 as specified in JIS K6758 and has a melting point peak in the range of 100-150° C. in differential scanning calorimetry (DSC), the melting point peak calorie being in the range of 10-600 J/g, especially the above elastomer composition wherein (A) has a crosslinking degree of 1-95% and a swelling degree of 3-100.

Abstract: Disclosed is a layered product comprising a skin layer and a cushioning layer and/or a reinforcing layer, said skin layer being a thermoplastic elastomer composition which comprises (A) 1-99 parts by weight of. an ethylene-&agr;-olefin copolymer produced by polymerizing ethylene and an &agr;-olefin of 3-12 carbon atoms using a metallocene catalyst and (B) 1-99 parts by weight of a propylene resin [total amount of (A) and (B) being 100 parts by weight], said ethylene-&agr;-olefin copolymer being partially or completely crosslinked. According to the present invention, a layered product can be provided which is excellent in flexibility, has a rubber-like or leather-like appearance, and is excellent in abrasion resistance, mechanical strength and environmental resistance.

Abstract: Disclosed is a layered product comprising a skin layer and a cushioning layer and/or a reinforcing layer, said skin layer being a thermoplastic elastomer composition which comprises (A) 1-99 parts by weight of an ethylene-&agr;-olefin copolymer produced by polymerizing ethylene and an &agr;-olefin of 3-12 carbon atoms using a metallocene catalyst and (B) 1-99 parts by weight of a propylene resin [total amount of (A) and (B) being 100 parts by weight], said ethylene-&agr;-olefin copolymer being partially or completely crosslinked.

Abstract: A method for producing a rubber composition crosslinked to a crosslinking degree of 50% or higher by mixing a crosslinkable rubber (A) and a thermoplastic resin (B) and crosslinking the mixture with a crosslinking agent (C), wherein the crosslinking agent (C) is divided and added in parts to sequentially carry out the crosslinking in which the crosslinking is carried out to a crosslinking degree of 5-45% by the first addition of the crosslinking agent (C) and furthermore the crosslinking is carried out to a crosslinking degree of 50% or higher by further addition of the crosslinking agent (C).

Abstract: A vulcanized, olefinic elastomer composition comprising (A) 1 to 99 parts by weight of an ethylene-&agr;-olefin copolymer prepared using a metallocene catalyst which copolymer comprises an ethylene unit and an &agr;-olefin unit having 3 to 20 carbon atoms and (B) 1 to 99 parts by weight of a polypropylene resin, provided that the total amount of the components (A) and (B) is 100 parts by weight, wherein (C) a polyorganosiloxane having a dynamic viscosity at 25° C. of at least 5,000 centistokes is contained in a proportion of 0.01 to 20 parts by weight per 100 parts by weight of a total of the components (A) and (B).

Abstract: A rubber composition which contains a thermoplastic crosslinked product comprising 1-99 parts by weight of an ethylene-&agr;-olefin copolymer (A) containing an ethylene unit and an &agr;-olefin unit of 3-20 carbon atoms and prepared using a metallocene catalyst and 1-99 parts by weight of an olefin resin (B) (the total amount of (A) and (B) being 100 parts by weight), the crosslinking degree of (A) being not less than 50%, and 1-500 parts by weight of a thermoplastic elastomer (C) added later to the crosslinked product.

Abstract: A process for producing a thermoplastic polymer composition comprising: (1) 100 parts by weight of an olefin polymer which comprises ethylene and at least one &agr;-olefin having 3 to 10 carbon atoms and in which the density is in the range of 0.85 to 0.91 g/cm3 and the molecular weight distribution (Mw/Mn) which is the ratio of weight average molecular weight (Mw) and number average molecular weight (Mn) as calculated by a gel permeation chromatography (GPC) is less than 3.5, (2) 5 to 300 parts by weight of a propylene polymer, (3) 5 to 250 parts by weight of an oil, and (4) 0.02 to 3 parts by weight of a radical initiator, which process comprises steps of previously mixing and heat-kneading the olefin polymer, the propylene polymer and the radical initiator; adding the oil in the stage in which cross-linking is at a proportion of 30 to 95% based on the cross-linking degree of the composition to be finally obtained; and further melt-kneading them to cross-link the same.

Abstract: An olefinic thermoplastic elastomer composition, which comprises a mixture comprising:(1) 100 parts by weight of an olefinic elastomer comprising ethylene and at least one .alpha.-olefin having 6 to 12 carbon atoms, and having an .alpha.-olefin copolymerization ratio of 20 to 30% by weight, a density of 0.8 to 0.9 g/cm.sup.3 and a molecular weight distribution (Mw/Mn) of less than 3.0 in terms of a ratio of weight-average molecular weight (Mw) to number-average molecular weight (Mn) calculated by gel permeation chromatography (GPC),(2) 5 to 90 parts by weight of a propylenic polymer, and(3) 5 to 250 parts by weight of an oil for rubber, the mixture being crosslinked by a radical initiator or both of a radical initiator and a crosslinking promoter.

Abstract: A process for producing an aluminum pipe is disclosed which has the steps of cutting the aluminum pipe on its periphery, and thereafter carrying out rotary pressure rolling. Also, an electrophotographic photosensitive member, a device unit, an electrophotographic apparatus and a developing roll having the aluminum pipe are disclosed.

Abstract: A process for producing an aluminum pipe is disclosed which has the steps of cutting the aluminum pipe on its periphery, and thereafter carrying out rotary pressure rolling. Also, an electrophotographic photosensitive member, a device unit, an electrophotographic apparatus and a developing roll having the aluminum pipe are disclosed.

Abstract: Disclosed is a vulcanizable, fluorine-containing elastomer composition comprising (a) a vulcanizable, fluorine-containing elastomer, (b) a polyol vulcanizing agent comprising a polyol compound as a crosslinking agent, and (c) an aliphatic amine compound represented by the formula: R.sub..alpha. NH.sub..beta. wherein R represents an alkyl group, .alpha. represents an integer of from 1 to 3, and .beta. represents 3 minus .alpha..