Treatment of metallic surfaces by oh-functional copolymer containing acidic aqueous compositions

Abstract

Disclosed herein are a method for treatment of at least one metallic surface of a substrate including at least a step of contacting said surface with an acidic aqueous composition (A), said acidic aqueous composition (A) including (a) one or more metal ions selected from the group consisting of titanium, zirconium and hafnium ions (b) and one or more polymers (P) having side chains (S1) and (S2) being different from one another, where side chain (S1) includes at least one functional group selected from the group consisting of hydroxyl groups and carboxylic acid groups and mixtures thereof, and side chain (S2) includes at least two hydroxyl groups, a corresponding acidic aqueous composition (A) as such, a master batch to produce such acidic aqueous composition (A), the use of the acidic aqueous composition (A) for treating metallic surfaces and substrates including the thus treated surfaces.

Dependencies are inferred from the claim text.