Epoxy fortifiers based on aromatic polyhydroxyl compounds

摘要

Epoxy resins have been found to be fortified (increased in strength and modulus yet not made brittle) by compounding: (a) a resin-forming polyepoxide (b) an amine curing agent for (a) and (c) a fortifier for (a)+(b) comprising the reaction product of (i) an aromatic polyhydroxy compound and (ii) a diepoxide with one epoxy group less reactive than the other: and heat curing the mixture. Strengths as high as 140 MPa and moduli as high as 4500 MPa have been attained with a ductile mode of failure.