Sumitomo Chemical Company, Limited

Naofumi Naga

Makoto Satoh

Hajime Sadatoshi

Yoshiaki Oobayashi

Masatada Tasaka

Kouji Mizunuma

Tatsuya Miyatake

Kotohiro Nomura

Propylene/ethylene-&agr;-olefin block copolymer and process for producing the same

Solid catalyst component, catalyst for olefin polymerization, and method for producing olefin polymer

Propylene random copolymer and film laminate thereof

A propylene/ethylene-.alpha.-olefin block copolymer obtained by block-copolymerizing a polypropylene component with an ethylene-.alpha.-olefin random copolymer component, which satisfies conditions of the following terms (I) to (III):

Propylene/ethylene-.alpha.-olefin block copolymer and process for

A propylene random copolymer and a film laminate thereof is described having excellent blocking resistance and transparency and substantially maintaining favorable low-temperature heat-sealing properties after corona discharge treatment. The propylene random copolymer of the invention includes a propylene component and an .alpha.-olefin component having 4 to 10 carbon atoms, wherein the content of the .alpha.-olefin component is in the range of about 6% to about 40% by weight, the intrinsic viscosity �.eta.! measured in tetralin at 135.degree. C. is not lower than about 0.45 dl/g and not higher than about 5.0 dl/g, and the melting point (Tm) measured by a differential scanning calorimeter and the content of 20.degree. C. xylene soluble fraction (CSX) fulfill a relationship of

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Ichihara, Japan

Naofumi Naga