Styrene-butadiene random copolymer and process for the productio

Details Styrene-butadiene random copolymer and process for the productio Styrene-butadiene random copolymer and process for the productio

1981-04-15

1983-01-04

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 73, 526180, 526181, C08F23610

Patent

active

043673252

ABSTRACT:
Styrene-butadiene random copolymers having an average vinyl content of at least 70%, a breadth of the distribution of vinyl contents of at least 20%, a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150, and a styrene content of about 3 to 30% by weight. They are prepared by copolymerizing styrene and butadiene in a hydrocarbon solvent in the presence of an organolithium initiator and a Lewis base and, if necessary, an anionic surface active agent containing --SO.sub.3 M or --OSO.sub.3 M (wherein M is Na, K, Rb or Cs) under temperature-raising conditions. They are rubber materials having low rolling resistance and high wet skid resistance.

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patent: 3366611 (1968-01-01), Wofford
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patent: 3773732 (1973-11-01), Dillenschneider
patent: 3980625 (1976-09-01), Sakamoto
patent: 4022959 (1977-05-01), Summer et al.
patent: 4139690 (1979-02-01), Torigoe et al.
patent: 4230841 (1980-10-01), Prudence

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