SELF-PRECIPITATING AQUEOUS PARTICULATE COMPOSITION COMPRISING PIGMENT BINDER PARTICLES

摘要

The invention relates to an acidic aqueous particulate composition with high stability against agglomeration for the autophoretic precipitation of organic/inorganic hybrid layers on metal surfaces comprising fluoride ions in addition to iron (III) ions and at least one dispersed organic binder (B), pigment binder particles composed of a pigment fraction and a binder fraction (B), wherein the binder (B) is a polymer of a monomer with at least one acid group containing at least one polymerisable double bond. The invention further relates to the use of an aqueous dispersion containing pigment-binder particles made up of a pigment fraction and a binder fraction (B) for producing a self-precipitating composition and a method for autophoretic precipitation on metal surfaces.