Curable thermosetting prepolymerised imide resin compositions

摘要

Curable thermosetting prepolymerized imide resin compositions are prepared by chemically reacting, at a temperature below 150 DEG C., a liquid mixture of carboxy-terminated polybutadiene/acrylonitrile (CTBN) and a co-reactant comprising at least one N,N'-bisimide of an unsaturated carboxylic acid of formula (I) where B represents a divalent radical containing a carbon-carbon double bond and A represents a divalent radical having at least two carbon atoms to yield a curable thermosetting prepolymerized imide resin composition containing copolymerized CTBN and co-reactant. A resin composition prepared by this method may be cured at a temperature between 100 DEG C. and 350 DEG C. to yield a fully cross-linked polyimide matrix containing a dispersion of phase-separated solid particles of copolymerized CTBN and co-reactant, the matrix having a lapshear strength at 20 DEG C. at least 50% greater than that of a fully cross-linked polyimide cured from the co-reactant alone.