Patent ID: 6207733
Filing Date: 2001-03-27
Classification: C08G

Abstract:
A capped amine hardener for epoxy resins obtained by a process which comprises:a. reacting amines, A, where said amines have at least two primary groups and no other secondary amino groups with cyclic aliphatic carbonates, B, which are esters of carbonic acid with aliphatic diols, under conditions sufficient so that for each 1 mol of A, 0.01 to 1 mol of the primary amine groups are converted into hydroxyalkylurethane groups;b. reacting the products obtained above with aliphatic carbonyl compounds, C, under conditions sufficient so that the remaining primary amino groups in said products are converted to ketimine or aldimine groups; andc. linking at least two of the products formed in step b) by reacting said products with compounds D, which have at least two groups which react with hydroxyl groups, under conditions sufficient to react with the hydroxyalkylurethane groups.