Patent ID: 7851520
Filing Date: 2010-12-14
Classification: C08G,H05K

Abstract:
1. A thermosetting epoxy resin composition comprising an ionic curing catalyst system, an epoxy resin, and an anion-trapping agent; wherein the ionic curing catalyst system is a combination of an aluminum chelator and a silane coupling agent having 1 to 3 alkoxy groups per molecule; wherein the aluminum chelator and the silane coupling agent act in concert to initiate curing by cationic polymerization of the epoxy resin by generating hydrogen ions and silanolate anions; wherein the aluminum chelator and the silane coupling agent are provided in amounts effective to ensure both sufficient curing of the epoxy resin composition by cationic polymerization and sufficient properties of the cured resin composition; wherein the anion-trapping agent is capable of trapping silanolate anions; and wherein the anion trapping agent is provided in an amount effective to ensure both sufficient curing of the epoxy resin composition by cationic polymerization and sufficient storage stability of the resin composition.