Phosphonic acid and polyvinyl alcohol conversion coating

Compositions – Preservative agents – Anti-corrosion

Reexamination Certificate

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Details

C252S389210, C106S014120, C106S014440, C106S287190

Reexamination Certificate

active

07935274

ABSTRACT:
Compositions for preparing coatings on metal substrates include a phosphonic acid, polyvinyl alcohol, an optional catalyst, and optionally an organo-functional silane. The catalyst may be a group IV-B compound, a boron compound, a vanadium compound, or a molybdenum compound. The compositions may be applied from an aqueous carrier to a metal surface and then dried to form a coating imparting good paint adhesion and corrosion resistance to the metal substrate.

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Kirk-Othmer, “Encyclopedia of Chemical Technology”, 1983, John Wiley & Sons, 3rdEdition, vol. 23, pp. 848-865.
English machine translation of Kuepper et al., WO 9929927 A2, 1999.

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