Process for preparing cycloolefin random copolymer

Details Process for preparing cycloolefin random copolymer Process for preparing cycloolefin random copolymer

C - Chemistry, Metallurgy

08

F

C08F 232/00 (2006.01) C08F 210/00 (2006.01) C08F 210/02 (2006.01) C08F 232/08 (2006.01)

Patent

CA 2082532

ABSTRACT The present invention is intended for the preparation of a cycloolefin random copolymer, which is a copolymer of ethylene, cycloolefin and if necessary .alpha.-olefin, in a high yield. The process for preparing a cycloolefin random copolymer according to the invention is a process for preparing a cycloolefin random copolymer comprising repeating units derived from (i) ethylene in an amount of 40 to 97 % by mol, repeating units derived from (ii) cycloolefin in an amount of 3 to 60 % by mol and repeating units derived from (iii) .alpha.-olefin of 3 - 20 carbon atoms in an amount of 0 to 20 % by mol, wherein (i) ethylene, (ii) cycloolefin and if necessary (iii) .alpha.-olefin of 3 - 20 carbon atoms are copolymerized in a liquid phase in the presence of a catalyst formed from (A) a soluble vanadium compound having a tertiary alkoxy group or .beta.-diketone as a ligand and (B) an organoaluminum compound represented by the formula (i-Bu)nAlCl3-n wherein n is 1.0 to 2.5.

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