Patent ID: 6447705
Filing Date: 2002-09-10
Classification: B29C

Abstract:
A method of molding a composite preform comprising the steps of:(a) providing at least one layer of fibers; (b) applying both a mixture of a catalyst in sufficient amount to be capable of causing cross-linking of a later applied mixture of a second epoxy resin and polycyanate and a first viscous, thermoplastic epoxy resin non-reactive with said catalyst to said at least one layer of fibers; (c) then applying at least one of heat or pressure to said at least one layer of fibers to melt and shape said first epoxy resin and allow said at least one layer of fibers to fuse together to form a preform; and (d) then impregnating said preform with said mixture of a second epoxy resin and a polycyanate to cause cross-linking of said mixture including said first epoxy resin applied in said step (b) catalyzed by said catalyst.