C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/4711
C08L 23/16 (2006.01) C08K 5/14 (2006.01) C08L 23/08 (2006.01) C08L 23/10 (2006.01)
Patent
CA 1278632
ABSTRACT A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B), (C) and (D): (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,the ethylene/.alpha.-olefin copolymer having the following properties (I) to (IV): (I) Melt index 0.01-50 g/10 min (II) Density 0.860-0.910 g/cm3 (III) Maximum peak temperature as measured according to a not lower than 100°C differential scanning calorimetry (DSC) (IV) Insolubles in boiling n-hexane not less than 10 wt.% (B) 15-35% by weight of a propylene polymer; (C) 10-40% by weight of an ethylene/.alpha.-olefin copolymer rubber; and (D) 10-40% by weight of an ethylene/unsaturated monocarboxylic acid ester copolymer in which the carboxylate unit content is 2-10 mol%. The thermo- plastic elastomer composition according to the invention has superior fluidity and the articles molded from such a composition have a superior appearance. The composition is particularly useful in the automotive and electric appliances industries.
546784
Kobayashi Seizo
Matsuura Kazuo
Mizoe Takashi
Usui Katumi
Yamaoka Noboru
Nippon Oil Company Limited
Swabey Ogilvy Renault
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