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AssigneeMitsui Chemicals, Inc.
InventorsYuichi Itoh, Kyoko Kobayashi, Akira Uchiyama, Masaaki Kawasaki
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The present invention relates to an olefinic thermoplastic elastomer composition which comprises a crystalline polyolefin resin (A), an ethylene-α-olefin-non-conjugated polyene copolymer rubber (B) and at least on rubber (C) selected from polyisobutylene, butyl rubber and a propylene-ethylene copolymer rubber having a propylene content of 50 mol % or more or an ethylene-α-olefin copolymer (D) having a density of 0.870 to 0.940 (g/cm3) and an ethylene content of 85 mol % or more, said ethylene-α-olefin-non-conjugated polyene copolymer rubber (B) being crosslinked thermoplastic elastomer composition, being obtained by random copolymerization of ethylene, and α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene in the presence of a metallocene catalyst, (1) containing the unit (a) derived from the ethylene and the unit (b) derived from the α-olefin in a molar ratio of 40/60 to 95/5 [(a)/(b)], (2) having an iodine value of 1 to 50 and (3) having an intrinsic viscosity [η] measured in decalin at 135° C. of 1.0 to 10 dl/g; and relates to a method for manufacturing the same.
A method for an olefinic thermoplastic elastomer composition comprising dynamically heat treating, in the presence of a crosslinking agent under the following conditions, 10 to 60 weight parts of a crystalline polyolefin resin (A) and 90 to 40 weight parts of an ethylene-α-olefin-non-conjugated polyene copolymer rubber (B) consisting of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene said conditions being according to the following formula,
A method for manufacturing an olefinic thermoplastic elastomer composition comprising dynamically heat treating, according to the conditions shown in the following formula in the presence of a crosslinking agent, 10 to 60 weight parts of a crystalline polyolefin resin (A), 88 to 38 weight parts of an ethylene-α-olefin-non-conjugated polyene copolymer rubber (B) which is an ethylene-α-olefin-non-conjugated polyene copolymer rubber consisting of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, which is obtained by random copolymerization of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene in the presence of a metallocene catalyst, (1) which has the ethylene-derived unit (a) and the unit (b) derived from the x-olefin with 3 to 20 carbon atoms in a molar ratio (a)/(b) of 40/60 to 95/5, (2) which has an iodine value of 1 to 50 and (3) which has an intrinsic viscosity [η] of 1.0 to 10 dl/g when measured in decalin at 135° C., and 2 to 30 weight parts of at least one rubber (C) selected from the group consisting of polyisobutylene, butyl rubber and a propylene-ethylene copolymer rubber having a propylene content of 50 mol % or more, said formula being,
A method for manufacturing an olefinic thermoplastic elastomer composition comprising dynamically heat treating, according to the conditions shown in the following formula in the presence of a crosslinking agent, 10 to 60 weight parts of a crystalline polyolefin resin (A), 88 to 38 weight parts of an ethylene-α-olefin-non-conjugated polyene copolymer rubber (B) which is an ethylene-α-olefin-non-conjugated polyene copolymer rubber consisting of ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene in the presence of a metallocene catalyst, (1) which has the ethylene-derived unit (a) and the unit (b) derived from the α-olefin with 3 to 20 carbon atoms in a molar ratio (a)/(b) of 40/60 to 95/5, (2) which has an iodine value of 1 to 50 and (3) which has an intrinsic viscosity [η] of 1.0 to 10 dl/g when measured in decalin at 135° C., and 2 to 40 weight parts of an ethylene-α-olefin copolymer (D) having a density of 0.870 to 0.940 (g/cm3) and having an ethylene content of 85 mol % or more, said formula being;
Dependencies are inferred from the claim text.