| abstract |
PURPOSE: A thermosetting resin composition excellent in heat resistance, etc., and suitable for use in paints, etc., obtained by mixing a curable resin obtained from a polycyanate ester having a plurality of cyanato groups in the molecule with a thermoplastic resin. n CONSTITUTION: A polycyanate ester (A) having at least two cyanato groups in the molecule (e.g., 1,4-dicyanato-benzene) or its prepolymer is reacted with a compound (B) having both a 1,2-epoxy group and a radical-polymerizable double bond in the molecule (e.g., glycidyl acrylate) in such a ratio that 0.25W2 1,2- epoxy groups of component B are present per cyanato group of component A at a temperature of 90W140°C in the presence of a radical polymerization inhibitor. The produced curable rsin is mixed with a thermoplastic resin (e.g., polyvinyl acetal resin) or its low-MW compound to obtain the purpose thermosetting resin composition. n COPYRIGHT: (C)1984,JPO&Japio |