Patent ID: 6641923
Filing Date: 2003-11-04
Classification: B23K,C08G,C08K,C09D,Y10T

Abstract:
A thermosetting coating composition comprising:(A) a resinous binder comprising: (1) at least one functional group-containing polymer, and (2) at least one curing agent having functional groups reactive with the functional groups of (1); (B) at least one electroconductive pigment dispersed in resinous binder (A), said pigment selected from at least one of zinc, ferrophosphorus, and tungsten; and (C) at least one boron-containing compound selected from boric acid, boric acid equivalents, and mixtures thereof, wherein each component is different, and wherein said boron-containing compound comprises a reaction product formed from the following reactants: (1) at least one polysiloxane comprising at least one of the following structural units (I): R1nR2mSiO(4âˆ’nâˆ’m)/2â€ƒâ€ƒ(I) â€ƒwherein each R1 is independently selected from a monovalent hydrocarbon group or a siloxane group; each R2 independently is a group comprising ORâ€², where Râ€² is H or an alkyl group having 1 to 20 carbon atoms; and m and n each represent a positive number fulfilling the requirements of 0(2) a boron-containing compound selected from at least one of boric acid, boric acid equivalents, and mixtures thereof, wherein each component is different.