The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2003
Filed:
Nov. 08, 2001
Yuichi Itoh, Chiba, JP;
Kyoko Kobayashi, Chiba, JP;
Akira Uchiyama, Chiba, JP;
Masaaki Kawasaki, Chiba, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The present invention relates to an olefinic thermoplastic elastomer composition which comprises a crystalline polyolefin resin (A), an ethylene-&agr;-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-&agr;-olefin copolymer (D) having a density of 0.870 to 0.940 (g/cm ) and an ethylene content of 85 mol % or more, said ethylene-&agr;-olefin-non-conjugated polyene copolymer rubber (B) being crosslinked thermoplastic elastomer composition, being obtained by random copolymerization of ethylene, and &agr;-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 &agr;-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 [&eegr;] measured in decalin at 135° C. of 1.0 to 10 dl/g; and relates to a method for manufacturing the same.