Capped AMINES AS CATALYST FOR WATER-COMPONENT (1K) -EPOXIDHARZSYSTEME

摘要

A capped amine hardener for epoxy resins is the reaction product of a di-prim. amine, a cyclic alkylene carbonate, an aliphatic carbonyl compound and a compound having at least 2 groups that react with hydroxyl groups. A capped amine hardener (I) for epoxy resin is the reaction product of: (A) an amine having at least two prim. amine groups, (B) a cyclic alkylene carbonate, (C) an aliphatic carbonyl compound and (D) a compound having at least two groups that react with hydroxyl groups. (I) is prepared by mixing 1 mole of (A) with (B) to form a hydroxyalkyl urethane whereby 0.1-1 moles of the prim. amine groups are reacted in a first step followed by a second step in which the remaining amine groups are reacted with (C) to form ketimine or aldimine groups and finally reaction of the hydroxy groups of the hydroxyalkyl urethane group with (D). An Independent claim is also included for a water dilutable one component epoxy resin composition (II) comprising a water dilutable epoxy resin (III) and (I).