Coating processes – With pretreatment of the base – Preapplied reactant or reaction promoter or hardener
Patent
1998-06-10
2000-02-15
Talbot, Brian K.
Coating processes
With pretreatment of the base
Preapplied reactant or reaction promoter or hardener
427308, 427309, 427327, 427167, B05D 302
Patent
active
060250259
ABSTRACT:
The present invention relates to a method of improving the durability of water-repellent films deposited on the surface of a substrate and to a coated article having a water-repellent film of improved durability deposited on the substrate surface. The method includes the steps of simultaneously abrasively and chemically preparing the surface to expose an increased number of bonding sites on the substrate surface by applying a dispersion including an acid solution and an abrasive material to the surface. The dispersion is then removed and the water-repellent film is formed over the prepared surface. The bonding sites react with the water-repellent film to more effectively bond the film to the substrate and thereby improve the durability of the water-repellent film. The abrading material is preferably selected from the group consisting of alumina, ceria, iron oxide, garnet, zirconia, silica, silicon carbide, chromic oxide, pumice and diamond, and the acid solution is preferably selected from the group consisting of solutions of hydrochloric acid, sulfuric acid, tartaric acid, phosphoric acid, hydrobromic acid, nitric acid, acetic acid, trifluoroacetic acid, oxalic acid and citric acid.
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Bartrug Bruce A.
Goodwin George B.
Lin Chia-Cheng
PPG Industries Ohio Inc.
Satchel Kenneth J.
Siminerio Andrew C.
Talbot Brian K.
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