Abstract: Aqueous impregnating emulsions for the impregnation of fibrous rovings are provided in which water has emulsified therein particles of epoxy resin in compatible admixture with thermoplastic resin, and a curing agent for the epoxy resin is dispersed in the emulsion, the curing agent being nonreactive under ambient conditions, such as dicyandiamide. Polysulfone resins are preferably used by dissolving them in methylene chloride and then evaporating this solvent after the epoxy resin has been dissolved in. Polycarboxylic acid emulsifying agents provide superior properties in the cured product.

Abstract: A polyurethane topcoat composition is provided comprising a water-free organic solvent solution containing from 0.5-2.6 isocyanate equivalents of the biuret of 1,6-hexamethylene diisocyanate per hydroxy equivalent of the polyesterification reaction product of the components set forth below having an acid number of less than 7:______________________________________ Parts by Permitted Component Weight Variation ______________________________________ 1,6-hexanediol 11.63 .+-. 1.0 di-(2-hydroxyethyl) dimethylhydantoin 20.92 .+-. 1.0 trimethylol propane 17.75 .+-. 1.0 dimethyl terephthalate 28.10 .+-. 1.0 adipic acid 21.15 .+-. 1.