Patent ID: 7067177
Filing Date: 2006-06-27
Classification: C09D,C23C

Abstract:
1. Process for coating an aluminum substrate, comprising the following steps: a) hydrolytic condensation, optionally in the presence of a condensation catalyst and/or additives, of hydrolysable starting components, wherein said hydrolysable starting components are: b) formation of a coating solution by addition of a prepolymer or reactive diluent, either of which is optionally crosslinkable with component (i), to the hydrolytic condensate obtained according to (a), wherein the prepolymer and the crosslinkable silane of the formula (II) form an interpenetrating network, and wherein the components do not include a non-crosslinkable silane; c) application of the coating solution obtained according to (b) to the aluminum substrate and drying of the coating solution to crosslink the hydrolytic condensate and/or the prepolymer and from a coating, wherein said coating exhibits improved adhesion to a tope layer and corrosion protection over the aluminum substrate.