Patent ID: 7749604
Filing Date: 2010-07-06
Classification: C08G,C08L,C09J,Y10T

Abstract:
1. The storage-stable aqueous dispersion of a polyurethane resin, an epoxy resin, and amine crosslinker for said epoxy resin, made by the method comprising: (A) adding an epoxy resin (1) which is a reaction product of a compound having an epoxide group and a diol or polyol, to a solvent solution of a polyurethane (2) having hydrophilic groups, to form a mixture; (B) dispersing said mixture in water to form an aqueous dispersion of (1) and (2), and optionally, removing at least 90% of by weight of said solvent; and (C) adding an amine crosslinker (3) for the epoxy resin (1) to the aqueous dispersion of (1) and (2); wherein the amount of the polyurethane resin (2) is 50 to 99% and the amount of the epoxy resin (1) is 1 to 50% by weight, based on the sum of resins (1) and (2).