Patent ID: 7253251
Filing Date: 2007-08-07
Classification: C08G,C08K,C09D

Abstract:
1. A water soluble thermosetting polyester resin composition for undercoating a pre-coated metal steel sheet, prepared by: reacting terephthalic acid with ethylene glycol in a molar ratio of terephthalic acid to ethylene glycol of about 1:1 to about 1:1.4 to produce polyethylene terephthalate; condensing the polyethylene terephthalate with a glycol and a polybasic acid to produce a thermosetting polyester resin; reacting about 100 parts by weight of the thermosetting polyester resin with about 5-to about 20 parts by weight of an anhydrous polybasic acid to produce a product; and adding an amine into the product until the pH of the product is about 7 to about 9.