Polymerization of conjugated dienes

Details Polymerization of conjugated dienes Polymerization of conjugated dienes

1984-05-22

1985-05-28

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526157, C08F 412

Patent

active

045201773

ABSTRACT:
The invention relates to a method of polymerizing one or more conjugated diene monomers to a polymer having an exceptionally high cis content employing a three component catalyst comprising (a) a rare earth compound, (b) an organo magnesium compound and (c) a Lewis acid in which a particular order of component addition is used. Under optimum conditions it is possible to obtain nearly 100% conversion to polymers of 98% or more cis content at very low concentrations of rare earth compound with respect to monomer.

REFERENCES:
patent: 3708551 (1973-01-01), Kittleman
patent: 4384982 (1983-05-01), Martin

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