Patent ID: 8637614

Claim:
An epoxy resin composition comprising: a curable epoxy resin; an amine curing agent; and a reactive liquid modifier comprising a compound having the formula wherein i and j are each, independently, integer values ranging from about 1 to 10; k and l are each, independently, integer values of at least 1 whose combined sum ranges from about 2 to 120; R 2 and R 3 are each, independently, an alkyl group having from about 1 to 14 carbon atoms, a cycloalkyl group having from about 3 to 14 carbon atoms, an aryl group having from about 5 to 12 ring atoms, and arenyl group having from about 6 to 26 carbon atoms and about 0 to 3 S, N, or nonperoxidic O atoms, or R 2 and R 3 taken together with the carbon to which they are both joined form a carbocyclic ring having from about 4 to 12 carbon atoms; and each p is, independently, 0 or 1, and further wherein the compound is polymerized to form at least one of an interpenetrating polymer network and a semi-interpenetrating polymer network with the curable epoxy resin.