Storage stable epoxy resin compositions for electrical laminates

摘要

Epoxy resin compositions that include an epoxy resin component that includes at least one epoxy resin and a solvent blend that includes methyl ethyl ketone and glycol methyl ether acetate are provided. The compositions are well-suited for use in the fabrication of prepregs and composite electrical laminates made therefrom.

主权项

1. An epoxy resin composition comprising:
(a) an epoxy resin component comprising at least one epoxy resin; and (b) a solvent blend comprising methyl ethyl ketone in an amount of no greater than 20 weight percent and propylene glycol methyl ether acetate in an amount of at least 80 weight percent, based on the total weight of the solvent blend such that the weight ratio of methyl ethyl ketone to propylene glycol methyl ether acetate is of 1:4 to 1:9; the composition having an epoxy resin solids content of at least 70 weight percent and a solvent blend content of 5 to 30 weight percent, based on the total weight of the composition and a storage stability of at least 130 days at 21° C.