Idemitsu Petrochemical Co., Ltd.

Idemitsu Kosan Company, Limited

Yasuhiro Goto

Shuji Machida

Tomio Tatsumi

Yutaka Minami

Masato Kijima

Mitsugu Kanzawa

Kazuo Sato

The invention relates to olefin branched macromonomers, olefin graft copolymers and olefin resin compositions having the advantage of good compatibility with polyolefin resins and good moldability and workability. The olefin branched macromonomer satisfies the following (a) and (b):

Branched olefinic macromonomer, olefin graft copolymer, and olefin resin composition

Long-chain, branched, propylene-based polymers, of which the melt index and the molecular weight distribution and the melt tension and the limiting viscosity both satisfy specific requirements, have good physical properties that are comparable to or better than those of conventional propylene-based polymers. They have good melt workability and are favorable to large-size blow molding and extrusion foaming. They are favorably used as miscibility improvers for propylene homopolymers and propylene-based copolymers.

Olefin-based polymer

Olefinic polymer

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Ichihara, Japan

Yasuhiro Goto