Hercules Corporation

Winfred E Weldy

James T Paul, Jr

Disclosed are nonblooming, crosslinkable compositions comprising crosslinkable elastomer, a peroxide crosslinker selected from .alpha.,.alpha.'-bis(t-butylperoxy) meta-diisopropylbenzene, .alpha.,.alpha.'-bis(t-butylperoxy) para-diisopropylbenzene and mixtures thereof, and phthalic anhydride.

Elimination of bloom in [vul-cup] peroxide crosslinked elastomer

The adhesion between carbon fibers and unsaturated matrix resins used in the preparation of composite structures is improved by the use of an unsaturated epoxide bifunctional coupling agent. The coupling agent can be applied to the carbon fibers or incorporated into the matrix resin system.

Unsaturated epoxides as coupling agents for carbon fibers and

Carbon fibers are coated with a sizing composition comprising a polyglycidyl ether, cycloaliphatic polyepoxide or their mixtures. Preferred sizes are mixtures of a liquid diglycidyl ether or bisphenol A and a solid diglycidyl ether of bisphenol A.

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Wilmington, DE, United States of America

Winfred E Weldy