Low temperature curable epoxy compositions containing urea curatives

摘要

A heat curable epoxy composition comprising the contact product of an epoxy resin, an epoxy curing agent and an accelerator for the epoxy curing agent, the curing agent or the accelerator comprising a urea compound which is the reaction product of an isocyanate and an alkylated polyalkylenepolyamine having one primary or secondary amine and at least two tertiary amines of the general formula:
where R 1 , R 2 , R 3 , R 4 and R 5 independently represent hydrogen, methyl or ethyl, n and m independently are integers from 1 to 6 and; X is an integer from 1 to 10.