Patent ID: 7615584

Claim:
A curing agent in dispersion form for water based epoxy resins, obtained by a method of preparation of a water based epoxy resin curing agent in dispersion form, which water based curing agent is formed by combining an active amine-hydrogen containing amine-functional dispersion (A) with an active amine-hydrogen containing amine-functional water based curing agent (B) in solution or emulsion form; wherein said active amine-hydrogen containing amine-functional dispersion (A) comprises a reaction product of: a) a polyamine compound having at least three active amine-hydrogen, and b) an aqueous epoxy resin dispersion having an epoxy solids equivalent weight of equal to or greater than 150 g/eq; wherein said active amine-hydrogen containing amine-functional water based curing agent (B): has an amphiphilic structure and a solids hydrogen equivalent weight of 50-500 g/eq; is capable of emulsifying a liquid epoxy resin to produce a stable emulsion; and is capable of yielding coating preparations of high gloss; and wherein the curing agent in dispersion form, at 5500 solids, has a viscosity less than 500 mPa's at 20° C.