Random styrene-butadiene copolymer rubber

Details Random styrene-butadiene copolymer rubber Random styrene-butadiene copolymer rubber

1983-03-18

1985-10-15

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F23610

Patent

active

045475601

ABSTRACT:
A random SBR having excellent tensile strength, resilience, and abrasion resistance as well as a reduced heat buildup property, which comprises 10% to 40% by weight of styrene units and the balance of butadiene units and has a Mooney viscosity of 30 to 150; a content of butadiene units having 1,2-vinyl structure of 60% or less; a ratio Mw/Mn of from 1.2 to 3.5; and a content of isolated styrene units of 40% or more and a content of another styrene units in long chain block form of 5% or less, both contents being determined by decomposing the copolymer with ozone and by applying a gel permeation chromatographic analysis to the ozone decomposition product.

REFERENCES:
patent: 2975160 (1961-03-01), Zelinski
patent: 3294768 (1966-12-01), Wofford
patent: 3558575 (1971-01-01), Keckler
patent: 3787377 (1974-01-01), Halasa et al.
patent: 3903019 (1975-09-01), Hargis et al.
patent: 3931107 (1976-01-01), Trepka
patent: 3980625 (1976-09-01), Sakamoto et al.
patent: 4145498 (1979-03-01), Farrar
patent: 4334567 (1982-06-01), Bond
patent: 4387756 (1983-06-01), Ogawa et al.
patent: 4387757 (1983-06-01), Ogawa et al.
Polymer, 1981, vol. 22, pp. 1721 through 1723.
Rubber Chem. and Techn., 43, pp. 1138-1153 (1970).

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