B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
117/184
B05D 5/00 (2006.01) B05D 7/16 (2006.01) C08K 3/22 (2006.01) C09D 5/08 (2006.01) C09D 183/04 (2006.01)
Patent
CA 1153257
METHOD FOR RENDERING NON-FERROUS METALS CORROSION-RESISTANT Abstract Non-ferrous metal substrates such as aluminum are coated with a composition consisting essentially of a dispersion of colloidal titania particles in a water/polar organic solvent medium of a partial condensate formed by hydrolyzing a silane such as methyltrimethoxysilane in the presence of the colloidal titania particles and in the presence of a sufficient amount of an acid such as acetic acid to provide a pH in the range of from 2 to 6. Optionally, the composition can contain up to 20 weight percent of colloidal silica and/or up to 5 weight percent of other types of monoorganosilsesquioxanes based upon the total weight of solids in the composition. The coated substrates are heated until the coating cures, preferably at 50°C to 150°C, to form a transparent coating which renders the substrate more resistant to corrosion induced by acids or salts such as road salt or ocean spray.
370273
Dow Corning Corporation
Gowling Lafleur Henderson Llp
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