Patent ID: 6140421
Filing Date: 2000-10-31
Classification: C08G,C08L,H05K

Abstract:
A flame retardant composition comprising 100 parts of an epoxy resin and about 15 to 30 parts of a curing agent for the epoxy resin, said curing agent comprising:(a) about 50% to 90% of a phenolic novolac having a UV absorbance of less than 0.260 at 365 nm when 10 milligrams of the novolac is dissolved in 100 milliliters of tetrahydrofuran; and(b) about 10% to 50% of a phenol-glyoxal condensation product having an ultraviolet absorbance of at least 0.260 at 365 nm and/or at least 0.400 at 350 nm when 10 milligrams of the condensation product is dissolved in 100 milliliters of tetrahydrofuran.