Polymerization feed composition comprising slow gel/cure systems

Details Polymerization feed composition comprising slow gel/cure systems Polymerization feed composition comprising slow gel/cure systems

1989-11-13

1991-05-14

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526119, 526139, 526141, 526190, 526281, 526283, 502102, 502117, C08F 450

Patent

active

050157051

ABSTRACT:
A process for preparing molded objects wherein a liquid reaction mass comprised of a metathesis polymerizable cycloolefin, a metathesis polymerization catalyst, a catalyst activator and a reaction rate moderator are charged to a mold wherein polymerization will take place, the improvement wherein said catalyst activator comprises a dialkylzinc compound. Significantly increased gel and cure times are obtained with the dialkylzinc compounds as compared to the use of aluminum alkyl activator compounds. The gel and cure times may be further controlled by the addition of a phenolic compound to the tungsten or molybdenum compound or by the addition of a Lewis base.

REFERENCES:
patent: 3639267 (1972-02-01), Vandenberg
patent: 4080491 (1978-03-01), Kobayashi et al.
patent: 4380617 (1983-04-01), Minchak et al.
patent: 4727125 (1988-02-01), Nelson

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