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AssigneeWestinghouse Electric Corp.
InventorsJoseph R. Marchetti, deceased, Fred E. Hickman, III, Wilbur R. Thomas
Estimating the term…
Disclosed is a solution of about 2 to about 25 percent by weight based on total solids, of an oligomer having at least two carboxylic acid groups polymerized from an unsaturated fatty acid having at least ten carbon atoms, up to about 20 percent by weight based on total solids of a phenolic resin, an epoxy resin in an amount from about stoichiometric up to about 20 percent excess equivalents of epoxide groups, up to about 2 percent by weight based on total solids of a catalyst and about 10 to about 90 percent by weight based on total solution weight of the solvent. Also disclosed is a prepreg which comprises a substrate impregnated with the solution, dried and cured to the B-stage, and a laminate which comprises a stack of prepregs, pressed under heat and cured to the C-stage.
A prepreg comprising a porous substrate of paper, glass and mixtures thereof, impregnated with a solution, then dried and cured to the B-stage, where said solution comprises:
A prepreg comprising a porous substrate of paper, glass and mixtures thereof impregnated with a solution, then dried and cured to the B-stage, where said solution comprises:
Dependencies are inferred from the claim text.