Polymerization process

Details Polymerization process Polymerization process

1991-08-30

1993-06-08

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 91, 526169, 526172, 526281, 526283, 502102, 502117, 502154, 556 57, 25218218, C08G 6108, C08F 478

Patent

active

052180654

ABSTRACT:
An improved olefin metathesis catalyst system comprises a tungsten halide having an average of no more than about one halide substituent and no more than one oxygen substituent per tungsten with the remaining tungsten valences satisfied with phenolic substituents incorporating at least one meta or para electron withdrawing group and a triorganotin hydride and, optionally, a boron halide promoter. The catalyst system forms a relatively stable polymerization mixture with polycycloolefins and effectively polymerizes dicyclopentadiene in the presence of water.

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