Process for preparing cycloolefin random copolymer

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

1992-11-10

1993-07-06

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526136, 526281, 526282, C08F 468, C08F23204, C08F23208

Patent

active

052255034

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) .sub.n AlCl.sub.3-n wherein n is 1.0 to 2.5.

REFERENCES:
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patent: 5106931 (1992-04-01), Sagane et al.
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91-284772/39, "Prepn. of Cyclic Olefin . . . ", Mitsui Petrochem Ind., Dec. 15, 1989, p. 1.
91-263132/36, "Prepn. of Cyclic Olefin-contg. random . . . ", Mitsui Petrochem Ind., Nov. 30, 1989, p. 1.
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