Heat resistant sulfur-modified polychloroprene copolymers

Details Heat resistant sulfur-modified polychloroprene copolymers Heat resistant sulfur-modified polychloroprene copolymers

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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patent: 4124754 (1978-11-01), Miller
patent: 4482676 (1984-11-01), Musch et al.
Journal of Polymer Science, vol. XVIII, pp. 227-234 (1955) by Maynard et al.
Rubber Chemistry and Technology, vol. 50, pp. 49-62 (1977) by Coleman, Tabb and Brame.
Rubber Chemistry and Technology, vol. 51, No. 4, pp. 668-676, by Coleman and Brame.

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