Thermoplastic elastomer compositions
US4775722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Sep 1, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B), (C) and (D): PA1 (A) 10-40% by weight of an ethylene/.alpha.-olefin copolymer prepared by copolymerizing ethylene and an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/.alpha.-olefin copolymer having the following properties (I) to (IV): PA2 (I) Melt index: 0.01-50 g/10 min PA2 (II) Density: 0.860-0.910 g/cm.sup.3 PA2 (III) Maximum peak temperature as measured according to a differential scanning calorimetry (DSC): not lower than 100.degree. C. PA2 (IV) Insolubles in boiling n-hexane: not less than 10 wt. % PA1 (B) 15-35% by weight of a propylene polymer; PA1 (C) 10-40% by weight of an ethylene/.alpha.-olefin copolymer rubber; and PA1 (D) 10-40% by weight of an ethylene/unsaturated monocarboxylic acid ester copolymer in which the carboxylate unit content is 2-10 mol %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.