Patent ID: 6558796
Filing Date: 2003-05-06
Classification: C08G,C09D,Y10T

Abstract:
An aqueous coating composition comprising:A) at least one reaction product of (a) 5 to 95 weight percent of at least one phosphonic acid derivative selected from compound I and II â€ƒwherein R1 is H or O=P(OH)2; R2 and R3 are independently H, OH or an aliphatic, cycloaliphatic and aromatic substituent having 1 to 25 carbon atoms and optionally up to 10 heteroatoms selected from the group consisting of oxygen, silicon and phosphorus; and Râ€² is an aliphatic, cycloaliphatic or aromatic substituent having 1 to 25 carbon atoms and optionally up to 10 heteroatoms selected from the group consisting of oxygen, silicon and phosphorus; (b) 5 to 95 weight percent of at least one compound having at least two epoxy groups and a number average molecular weight Mn of 300 to 5000 g/mol; and (c) 0 to 90 weight percent of a compound having one epoxy-functional group, wherein the proportions by weight of components (a), (b) and (c) total 100 weight percent; B) at least one metallic pigment; wherein the amount of phosphorus in the reaction product A) is 0.2-5.0 percent by weight, based on the weight of the metal pigment B).