CURING AGNET FOR EPOXY RESIN LAMINATING COMPOSITIONS

摘要

Curing agents for mixed di- and tetra-functional epoxy resin laminating compositions comprise a mixture of dicyandiamide and from 0.01 to 1 parts per part of dicyandiamide of a tetraalkylguanidine. B-staged prepregs for cores and for multi-layer bonding sheets having superior storage stability and adapted to provide reproducible multilayer laminates are made from laminating compositions employing the new curing agent combination.