Process for producing rubbery polymers and copolymers having bra

Details Process for producing rubbery polymers and copolymers having bra Process for producing rubbery polymers and copolymers having bra

1974-03-14

1976-09-14

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526340, 526 73, C08F23610, C08F13606

Patent

active

039806243

ABSTRACT:
A polymerization process for producing rubbery polymers or random copolymers having excellent physical properties as well as good processability, and completely freed from a flow at normal temperature. The process, which may be called as "Low-temperature Pretreatment Polymerization process," comprises polymerizing conjugated dienes or copolymerizing conjugated dienes and monovinyl substituted aromatic compound under a specific polymerization conditions in the presence of an alkyllithium catalyst to produce a polymer or random copolymer of the desirably controlled structure of branches to afford such excellent properties mentioned above.

REFERENCES:
patent: 2975160 (1961-03-01), Zelinski
patent: 3030346 (1962-04-01), Cooper
patent: 3213075 (1965-10-01), Sonnenfeld
patent: 3361730 (1968-01-01), Naylor
patent: 3464961 (1969-09-01), Foster

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