Slow gel/cure systems based on dialkylzinc for dicyclopentadiene

Details Slow gel/cure systems based on dialkylzinc for dicyclopentadiene Slow gel/cure systems based on dialkylzinc for dicyclopentadiene

1988-09-28

1989-11-21

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526139, 526141, 526142, 526190, 526281, 526282, 526283, 2643282, C08F 450, C08F 3200, C08F 3600

Patent

active

048824011

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.
Journal of Catalysis 44, 416-420, Kazuaki Ichikawa, Osamu Watanabe, Toru Takagi,.sup.1 and Kazuo Fukuzumi.

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