Low compression set fluoroelastomer polymer foam and method

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

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521 51, 521 54, 521 98, 521134, 521142, 521145, 525191, 525199, 264455, C08J 906

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active

057537186

ABSTRACT:
A fluoroelastomer polymer foam having a compression set value in the range of from about 8.3% to about 43% and closed cell microvoids having diameters of from about 0.002 mm to about 0.048 mm or less, and a method for foaming a fluoroelastomer polymer comprising the steps of dispersing in a fluoroelastomer polymer to be foamed a phenol-based blowing agent to produce a foaming formulation and curing the formulation at a temperature of from about 250.degree. F. (121.degree. C.) to about 450.degree. F. (232.degree. C.) and a pressure of from about ambient to about 3.0 atm.

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Fluorel.RTM.--Fluorelastomer Processing Information, pp. 1-8.

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