Pure tungsten oxyphenolate complexes as dcpd polymerization...

Details Pure tungsten oxyphenolate complexes as dcpd polymerization... Pure tungsten oxyphenolate complexes as dcpd polymerization...

C - Chemistry, Metallurgy

08

F

C08F 4/78 (2006.01) C08F 32/00 (2006.01) C08G 61/08 (2006.01)

Patent

CA 2053128

PATENT Bell Case 5 PURE TUNGSTEN OXYPHENOLATE COMPLEXES AS DCPD POLYMERIZATION CATALYSTS Abstract of the Disclosure This invention relates to a two component catalyst system for polymerization of metathesis polymerizable cycloolefins, comprising (a) a tungsten compound of the formula WOX4-x(OAr)x wherein represents chlorine, bromine or fluorine, Ar represents a hindered phenyl ring having 1-5 substituents and x = 1, 2 or 3; and (b) an activator compound that preferably is tri- phenyltin hydride or trialkyltin hydride, preferably a tributyltin hydride. Among the preferred molecules or groups that are substituted on the phenyl ring of the tungsten compound include chlorine, bromine, phenyl, methoxy and isopropyl. Ar may also represent a multisubstituted phenyl group such as 2,4-dichloro-6-methyl phenyl.

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