Polymerized cycloolefins using transition metal catalyst and...

Details Polymerized cycloolefins using transition metal catalyst and... Polymerized cycloolefins using transition metal catalyst and...

2011-03-22

2011-03-22

Cheung, William K (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C438S015000, C438S029000, C438S125000, C438S128000, C438S116000, C257S642000, C257S643000, C257S680000, C257S702000, C257S795000

Reexamination Certificate

active

07910674

ABSTRACT:
Methods for the addition polymerization of cycloolefins using a cationic Group 10 metal complex and a weakly coordinating anion of the formula:in-line-formulae description="In-line Formulae" end="lead"?[(R′)zM(L′)x(L″)y]b[WCA]din-line-formulae description="In-line Formulae" end="tail"?wherein [(R′)zM(L′)x(L″)y] is a cation complex where M represents a Group 10 transition metal; R′ represents an anionic hydrocarbyl containing ligand; L′represents a Group 15 neutral electron donor ligand; L″represents a labile neutral electron donor ligand; x is 1 or 2; and y is 0, 1, 2, or 3; and z is 0 or 1, wherein the sum of x, y, and z is 4; and [WCA] represents a weakly coordinating counteranion complex; and b and d are numbers representing the number of times the cation complex and weakly coordinating counteranion complex are taken to balance the electronic charge on the overall catalyst complex.

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XP002276662, Database Chemabs, Chemical Abstracts Service, JP 202 146145 filed May 22, 2002, Abstract.

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