Binder resin for resin transfer molding preforms

摘要

The invention relates to a resin transfer molding preform binder resin that comprises at least one aromatic polyepoxide, a fluorene epoxide that is different than the aromatic polyepoxide and having a defined structure, and a 9,9-bis(aminophenyl)fluorene curing agent. The binder resin is a solid, room temperature stable, essentially nonsintering powder that displays a glass transition temperature greater than about 40 DEG C. Also disclosed are preforms made with the binder resin and a method for preparing the preforms.