Nippon Oil Company

Kiyoyasu Tanabe

Kazuo Matsuura

Noboru Yamaoka

Takashi Mizoe

Katumi Usui

A crosslinked resin composition obtained by crosslinking a composition comprising (A) 95-10 wt. % of a propylene polymer and (B) 5-90 wt. % of an ethylene/.alpha.-olefin copolymer having the following properties (I) to (iv) and prepared by copolymerizing ethylene with an .alpha.-olefin having 3 to 12 carbon atoms in the presence of a catalyst, said catalyst comprising a solid component and an organoaluminum compound, said solid component containing at least magnesium and titanium:

Crosslinked resin compositions

This invention provides a thermoplastic elastomer composition obtained by blending (A) a hard segment comprising a low-density ethylene-.alpha.-olefin copolymer formed by copolymerizing ethylene with an .alpha.-olefin by the use of a specific catalyst and characterized by specifically defined properties and (B) a soft segment comprising an ethylene-.alpha.-olefin copolymer rubber, or obtained by partial cross-linking of the resulting blend. This elastomer composition has characteristic features such as high flexibility, good fluidity, excellent tensile properties, good thermal resistance and oil resistance and low permanent strain.

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Tokyo, Japan

Kiyoyasu Tanabe