Phosphonic acid and polyvinyl alcohol conversion coating
AssigneeBulk Chemicals, Inc.
InventorTed Schlosser
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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.
Claims30
A composition for forming a coating on a metal surface, the composition comprising a phosphonic acid, polyvinyl alcohol, and water.
A method of making a composition for forming a coating on a metal surface, the method comprising combining in aqueous solution a phosphonic acid, polyvinyl alcohol, and a catalyst selected from the group consisting of group IV-B compounds, boron compounds, vanadium compounds, and molybdenum compounds.
A method of forming a coating on a metal surface, the method comprising applying to the metal surface a composition comprising a phosphonic acid, polyvinyl alcohol, water, and a catalyst selected from the group consisting of group IV-B compounds, boron compounds, vanadium compounds, and molybdenum compounds, said phosphonic acid being soluble in the composition.
A metal surface having disposed thereon a coating made by a method comprising applying to the metal surface a composition comprising a phosphonic acid, polyvinyl alcohol, water, and a catalyst selected from the group consisting of group IV-B compounds, boron compounds, vanadium compounds, and molybdenum compounds, said phosphonic acid being soluble in the composition.
Dependencies are inferred from the claim text.