Patent ID: 7300963
Filing Date: 2007-11-27
Classification: C08G,C09D,Y10T

Abstract:
1. A hardener for water-based epoxy resin systems, the hardener prepared by a process comprising: (a) reacting a mixture comprised of: (A) at least one epoxidized polyalkylene oxide selected from the group of epoxidized polyethylene oxides, epoxidized polypropylene oxides, epoxidized polyethylene propylene oxides and mixtures thereof; (B) at least one epoxidized aromatic hydroxy compound selected from the group of bisphenol A epoxides, bisphenol F epoxides and mixtures thereof; and (C) at least one aromatic hydroxy compound selected from the group of bisphenol A, bisphenol F and mixtures thereof, to form an intermediate product; and (b) introducing an excess amount of polyamine (E) sufficient for the reaction of 1 molecule of polyamine with each epoxy group in the intermediate product, and reacting the intermediate product with the polyamine.