Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1984-09-10
1986-08-12
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
526295, C08F 800, C08F 3618, C08L 1102
Patent
active
046057056
ABSTRACT:
A heat resistant sulfur-modified polychloroprene copolymer of 2-chloro-1,3-butadiene and 2,3-dichloro-1,3-butadiene characterized in that said polychloroprene has a Mooney viscosity ML 1+4' (100.degree. C.) of from about 25-75, contains from about 3-25% by weight of units derived from 2,3-dichloro-1,3-butadiene, and of the units derived from 2-chloro-1,3-butadiene, 92-96% by weight of said units have a 1,4-trans configuration, said polychloroprene copolymer being curable with 4 parts MgO and 5 parts ZnO per 100 parts of copolymer at about 160.degree. C. for 30 minutes to yield a vulcanizate having a tensile strength of at least 10 MPa.
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Journal of Polymer Science, vol. XVIII, pp. 227-234 (1955) by Maynard et al.
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E. I. Du Pont de Nemours and Company
Kulkosky Peter F.
Schofer Joseph L.
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