Patent ID: 7344607
Filing Date: 2008-03-18
Classification: C08L,C09D,C23C,D04H,D21H

Abstract:
1. A method of forming a conversion or passivation coating on a metal surface comprising contacting said metal surface with an acidic aqueous treatment composition having a pH of about 2 to about 6, said composition comprising: about 0.01 to 80 wt % of (a) (i) polyamidoamine/epihalohydrin resin or (ii) cationic polyamine/epihalohydrin copolymer, about 0.01-30 wt % (b) fluoacid of a Group IVB metal, about 0.01-30 wt % of (c) phosphoric acid, about 0.05-10 wt % of (d) an aminosilane compound and about 0.01-30 wt % of (e) a film forming latex.