Polypropylene random copolymer and film thereof

Details Polypropylene random copolymer and film thereof Polypropylene random copolymer and film thereof

C - Chemistry, Metallurgy

08

F

C08F 210/06 (2006.01) C08F 10/00 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2098664

ABSTRACT OF THE DISCLOSURE A polypropylene random copolymer obtained by copoly- merizing propylene and an .alpha.-olefin or propylene, ethylene, and .alpha.-olefin using a Ziegler-Natta catalyst substantially in the absence of solvent, wherein propylene content is from 92.3 to 75.0% by weight, the ethylene content (E) is from 0 to 2.7% by weight, and the .alpha.-olefin content is from 5.0 to 25.0% by weight, and wherein the content (C) of 20°C xylene-soluble components in the random copolymer satisfies following formulae (1) to (3); in the copolymer wherein the ethylene content (E) is less than 1.5% by weight, C ? 12.0 (weight %) (1) in the copolymer wherein the ethylene content (E) is from 1.5% by weight to 1.8% by weight, C ? 42.0 - 20.0 x E (weight %) (2) and in the copolymer wherein the ethylene content (E) is from 1.8% by weight to 2.7% by weight, C ? 6.0 (weight %) (3). - 29 -

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