CHAIN-EXTENDED POLYAMINE-ADDED EPOXY RESIN CURING AGENT FOR USE IN WATER-BORNE TWO-COMPONENT COATING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a water-based polyepoxide coating system in which the compatibility of the constituent resin with the constituent amine component and the pot life are improved by mixing a polyamine with a polyetpoxy resin and a specified reaction product. ;SOLUTION: A polyamine (A) containing a prim. amine functional group is reacted with the first epoxide (B) having an epoxide equivalent(EEW) of 130-450 to obtain an intermediate (C) comprising an amine-terminated epoxyde adduct comprising about 2mol of the polyamine and 1mol of the polyepoxide. This intermediate is reacted with the second polyepoxide (D) having an EEW of 450-2,000 and used in an amount enough to react 10-40% of the effective prim. amine of the adduct to obtain a chain-extended polyamine/polepoxide adduct (E). A mixture of components C and E is end-capped with a monoepoxide composition comprising an aromatic glycidyl ether and/or an alkyl-substituted aromatic glycidyl ether.;COPYRIGHT: (C)1997,JPO