Process for the production of cycloolefin random copolymer

Details Process for the production of cycloolefin random copolymer Process for the production of cycloolefin random copolymer

1995-12-27

1997-07-22

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526126, 526127, 526133, 526134, 526151, 526153, 526170, 526281, 526282, 526943, C08F 206, C08F23208

Patent

active

056504713

ABSTRACT:
There is provided a process for the production of a cycloolefin copolymer which comprises copolymerizing an .alpha.-olefin having 2 or more carbon atoms and a specific cycloolefin in the presence of a specific metallocene type catalyst in a solvent mixture of a hydrocarbon solvent having a solubility parameter (value of .delta.) of 7.7 [(cal/cm.sup.3).sup.1/2 ] or more and a hydrocarbon solvent having a solubility parameter (value of .delta.) of 7.5 [(cal/cm.sup.3).sup.1/2 ] or less as a polymerization solvent. A cycloolefin copolymer having a high molecular weight can be produced in a high concentration by this process at a high yield.

REFERENCES:
patent: 5003019 (1991-03-01), Ishimaru et al.
patent: 5008356 (1991-04-01), Ishimaru et al.
patent: 5142007 (1992-08-01), Sagane et al.

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