Process for polymerizing 1,3-butadiene

Details Process for polymerizing 1,3-butadiene Process for polymerizing 1,3-butadiene

1982-08-19

1985-03-12

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525247, C08F 472

Patent

active

045046395

ABSTRACT:
A process for polymerizing 1,3-butadiene, comprising bring into contact a 1,2-polymerization catalyst consisting essentially of a soluble cobalt compound, an organic aluminum halide, an organic lithium compound, and carbon disulfide or phenyl isothiocyanate with 1,3-butadiene in a polymerization medium. The process can be applied particularly advantageously in the preparation of 1,2-polybutadiene, and the resultant 1,2-polybutadiene has a content of syndiotactic 1,2-structural units of not less than 90%, a melting point of 200.degree. C. to 220.degree. C., and an intrinsic viscosity [.eta.] of 1.2 to 7.

REFERENCES:
patent: 4340685 (1982-07-01), Takeuchi et al.
patent: 4379889 (1983-04-01), Ashitaka et al.

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