Method of preparing fiber/resin composites

A method of preparing a filament winding fiber/resin composite substantially free of resin drip comprising:

• a) providing a stable liquid resin composition comprising:
• i. an epoxy component including at least one polyepoxide resin curable by heat;
• ii. at least one heat activated curing agent for said epoxy component comprising at least one carboxylic acid anhydride and at least one anhydride accelerator;
• iii. an olefinically unsaturated monomer component including at least one polyolefinically unsaturated monomer curable by actinic radiation;
• iv. at least one photoinitiator which is not a peroxide;
• and
• v. at least one heat activated organic peroxide for said olefinically unsaturated monomer component, said peroxide having a ten hour decomposition half-life at temperatures from about 50.degree. C. to less than about 104.degree. C. and which is substantially unreactive in the presence of actinic radiation and in the absence of a photosensitizer;
• b) applying said resin composition to a fiber to form a fiber/resin composite;
• c) subjecting said fiber/resin composite to actinic radiation sufficient to immobilize said resin composition by at least partially curing said olefinically unsaturated monomer;
• and
• d) subjecting said fiber/resin composite to heat sufficient to activate said or organic peroxide to cure remaining unreacted olefinically unsaturated monomer and immobilize said resin composition and to cure said polyepoxide;
• wherein said immobilization with actinic radiation and further heat-curing occurs without substantial resin drip and yields a T.sub.g of at least about 110.degree. C.