Catalyst system for preparing cyclic olefin addition...

Details Catalyst system for preparing cyclic olefin addition... Catalyst system for preparing cyclic olefin addition...

2011-08-02

2011-08-02

Harlan, Robert D. (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S281000, C526S171000, C526S172000

Reexamination Certificate

active

07989570

ABSTRACT:
The present invention relates to a catalyst system for preparing a cyclic olefin addition polymer, a method for preparing the catalyst system and a cyclic olefin addition polymer prepared by the method, and more particularly to the method comprising the steps of contacting some content of norbornene-based monomer having a specific polar functional group with a catalyst system comprising a) a Group X transition metal compound; b) a compound comprising a neutral Group XV electron donor ligand having a cone angle of at least 160°; and c) a salt capable of offering an anion that can be weakly coordinated to the transition metal of the a) the Group X transition metal compound.

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