Process for curing elastomeric vinylidene fluoride copolymers

Details Process for curing elastomeric vinylidene fluoride copolymers Process for curing elastomeric vinylidene fluoride copolymers

1997-09-29

2000-02-01

Zitomer, Fred

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253263, 525340, 525368, 525369, 525378, 525384, 525387, 525379, C08F 832

Patent

active

060204400

ABSTRACT:
Elastomeric vinylidene fluoride-containing copolymers are cured by a sequential process. In a first step, gum fluoroelastomer is mixed at a temperature of 150.degree. C.-250.degree. C. in the presence of an organic base and metal oxide or metal hydroxide to generate an unsaturated product. The unsaturated product is mixed with a polyhydroxy compound, polyamine, or organic peroxide and the resultant compounded fluoroelastomer is crosslinked.

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J. R. Cooper, "Elastomers by Radical and Redox Mechanisms", Polymer Chemistry of Synthetic Elastomers, Part I, Chapter 4, J. P. Kennedy and Erik G. M. Tornqvist, Ed. Interscience Publishers, Div. Of John Wiley & Sons, New York, London, Sydney; 1968, pp. 273-290.

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