Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1980-05-27
1982-01-19
Lusignan, Michael R.
Coating processes
With post-treatment of coating or coating material
Heating or drying
10628712, 10628713, 260 282M, 4273882, 4273884, 4273897, 428447, 428450, B05D 302
Patent
active
043117384
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.degree. C. to 150.degree. 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.
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Dow Corning Corporation
Lusignan Michael R.
Page Thurman K.
Rakoczy Richard E.
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