Patent ID: 6833398
Filing Date: 2004-12-21
Classification: C08G,C09D,Y10T

Abstract:
An autodeposition composition comprising the following components(A) water; (B) an adduct which is the reaction product of (1) one or more reactants comprising an epoxy resin of a glycidyl ether of bisphenol A, (2) one or more reactants comprising an epoxy resin of a glycidyl ether of cardanol and a chain extender comprising bisphenol A, or one or more reactants comprising a monofunctional compound selected from the group consisting of fatty acids and monoethers of polyalkylene glycols; (C) one or more emulsifying agents in sufficient quantity to disperse component (B) so that no separation or segregation of bulk phases that is perceptible with the normal unaided human vision occurs during storage at 25Â° C. for at least 24 hours after preparation of the autodeposition composition, in the absence of contact of the autodeposition liquid with any substance that reacts with the autodeposition composition; (D) one or more dissolved accelerator agents selected from the group consisting of acids, oxidizing agents and complexing agents, sufficient in strength and amount to impart to the autodeposition composition an oxidation-reduction potential that is at least 100 mV more oxidizing than a standard hydrogen electrode; and (E) a cross-linker comprising at least one blocked isocyanate cross-linker.