Coating composition
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsWilliam E. Fristad, Jeng-Li Liang, Timothy S. Kelly
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Abstract
A coating composition comprising an aqueous mixture containing inorganic particles, a catechol compound, and one or more fluoroacids. The preferred fluoroacids are selected from fluorotitanic acid, fluorozirconic acid, fluorosilicic acid, fluoroboric acid, fluorostannic acid, fluorogermanic acid, fluorohafnic acid, fluoroaluminic acid or salts of each thereof. The invention is also directed to a coating on a metal substrate. The coating comprises silica particles attached to the metal substrate through a metal-oxide matrix. The metal-oxide matrix comprises a metal selected from titanium, zirconium, silicon, hafnium, boron, aluminum, germanium, or tin, and a catechol compound.
Claims26
A coating composition comprising an aqueous mixture comprising a catechol compound, one or more fluoroacids, and alumina-modified silica particles with a SiO2:Al2O3 weight ratio from 80:1 to 240:1.
A coating composition prepared by a process comprising:
- providing alumina-modified silica particles with a SiO2:Al2O3 weight ratio from 80:1 to 240:1, one or more fluoroacids, a catechol compound, and water;
- and
- mixing the alumina-modified silica particles, the one or more fluoroacids, the catechol compound, and the water.
A coating composition comprising an aqueous mixture comprising:
- inorganic particles;
- one or more fluoroacids;
- and
- pyrocatechol sulfonephthalein, wherein the coating composition has a pH from 4.1 to 5.5.
Dependencies are inferred from the claim text.