Patent ID: 8148451
Filing Date: 2012-04-03
Classification: C08G,C09D

Abstract:
1. A single-stage process for the preparation of water-dispersible epoxy phosphate ester polymer substantially free of phosphoric acid from a mixture of epoxy resins selected from a group comprising diglycidyl ethers of bisphenols and having an average of greater than 1.5 epoxy groups and having one or more epoxy resins that is/are different in grade and/or type than at least one other epoxy resin in said mixture of epoxy resins, wherein each grade and/or type of epoxy resin has an average weight per epoxide equivalent (WPE) that is different from each other grade and/or type of epoxy resin in said mixture of epoxy resins, which comprises the step of: reacting said mixture of epoxy resins with a phosphoric acid source material, selected from a group comprising orthophosphoric acid, phosphoric acid, polyphosphoric acid, superphosphoric acid, and other condensed forms of phosphoric acid.