Olefinic thermoplastic elastomer composition and method for producing the same
US6635705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Nov 8, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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/cm3) 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.