Amorphous high molecular weight copolymers of ethylene and...

Details Amorphous high molecular weight copolymers of ethylene and... Amorphous high molecular weight copolymers of ethylene and...

C - Chemistry, Metallurgy

08

F

402/641

C08F 2/34 (2006.01) C08F 210/16 (2006.01) C09K 8/035 (2006.01) F17D 1/16 (2006.01)

Patent

CA 1268298

ABSTRACT OF THE DISCLOSURE AMORPHOUS HIGH MOLECULAR WEIGHT COPOLYMERS OF ETHYLENE AND ALPHA-OLEFINS The invention relates to amorphous copolymers of ethylene and one or more alpha-olefins comprising from 3 to 12 carbon atoms, possessing a high molecular weight, a crystallinity index less than or equal to 1.0%, a content of units derived from ethylene comprised between 40 and 60 moles %, a content of units derived from propylene and/or 1-butene between 60 and 40 moles % and a content of units derived from alpha-olefins comprising 5 to 12 carbon atoms of less than or equal to 10 moles %. These copolymers of a practically completely amorphous character advantageously occur in the form of a powder which is easy to handle. They are obtained by copolymerisation in the gas phase by means of a catalyst system of the Ziegler-Natta type, very stereospecific to the polymerisation of propylene.

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