초록 ▼

A composite tooling part having excellent dimensional stability, which may be prepared at low cost employs a one-component epoxy resin system having a catalyst which is the reaction product of an aromatic dicyanate and an imidazole. Reinforcing materials are incorporated in the matrix, and the resul

A composite tooling part having excellent dimensional stability, which may be prepared at low cost employs a one-component epoxy resin system having a catalyst which is the reaction product of an aromatic dicyanate and an imidazole. Reinforcing materials are incorporated in the matrix, and the resulting prepreg is allowed to cure at low temperature, down to about room temperature, until the free standing state is obtained. Thereafter, if elevated temperature performance is necessary, the product can be post-cured at elevated temperatures, without the need for a high temperature master.

대표청구항 ▼

A composite tooling prepreg, comprised of an epoxy resin system and reinforcing material, said epoxy resin system comprising a catalyst of the formula [Figure] wherein R is aromatic or aralkyl, and wherein the 2, 4 and 5 positions of the imidazole of said formula are independently unsubstituted or s

A composite tooling prepreg, comprised of an epoxy resin system and reinforcing material, said epoxy resin system comprising a catalyst of the formula [Figure] wherein R is aromatic or aralkyl, and wherein the 2, 4 and 5 positions of the imidazole of said formula are independently unsubstituted or substituted with C1-12 alkyl, aryl or aralkyl, and an epoxy resin, said tooling prepreg being in a form capable of being cured to form a tooling which can be used for repeated molding of composite parts.