Patent ID: 7862862

Claim:
A method of improving paint adhesion to a metal surface comprising the steps of: applying to said metal surface a paint primer, and drying the surface for crosslinking, wherein said primer comprises, before drying, a dispersion in one or more solvents of one or more compounds of the average formula: H 2 -yH 2 - x (Râ€³ 3 SiRâ€²) y Nâ€”Râ€”N(Râ€²SiRâ€³ 3 ) x in which R is selected from the group consisting of hydrocarbon and hydrocarbon ether groups that separate the N atoms by at least four intermediate atoms in a chain; each Râ€² group is a hydrocarbon or hydroxylated hydrocarbon ether group that separates each Si from each N by at least three carbon atoms; each Râ€³ group is a silicon-bonded hydrolyzable group or an alkyl group, at least two of said hydrolyzable groups being bonded to each Si atom; and x and y are each numbers of a value of essentially 1 to 2 that together total from 2.5 to 4 and followed by applying paint to the primed surface and drying.