METHOD FOR CURING AN EPOXY RESIN COMPOSITION CONTAINING REACTIVE PHOSPHONATE

摘要

The invention pertains to a process for curing an epoxy resin composition, wherein a reactive phosphonate is used as curing agent together with 0 to 20% by weight of the total composition of a co-curing agent. Preferably, the phosphonate is an oligomeric phosphonate comprising a repeating unit OP(O)(R)-O-arylene and having a phosphorous content greater than 12% by weight, wherein R is a lower alkyl and arylene is a radical of a dihydric phenol, which phosphonate is used together with 5 to 15% by weight of the total composition of the co-curing agent. The cured epoxy resin composition can be used for making an electronic substrate material, such as a printed wiring board.