Organolithium-Lewis base polymerization of 1,3-butadiene and nov

Details Organolithium-Lewis base polymerization of 1,3-butadiene and nov Organolithium-Lewis base polymerization of 1,3-butadiene and nov

1975-06-04

1977-05-10

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526181, 526335, C08F 448

Patent

active

040229599

ABSTRACT:
Homopolymers of butadiene having a vinyl content which varies substantially and decreasingly along the longitudinal axis of the macromolecule toward an end thereof are produced by conducting an organolithium-Lewis base catalyzed polymerization at a substantially constantly increasing polymerization temperature throughout the polymerization.

REFERENCES:
patent: 3301840 (1967-01-01), Zelinski
patent: 3451988 (1969-06-01), Langer
patent: 3502746 (1970-03-01), Miles
patent: 3829409 (1974-08-01), Sommer et al.
patent: 3887535 (1975-06-01), Minekawa et al.

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