Abstract: A protective coating composition and process is described for simultaneously sealing and priming the anodic coating applied to aluminum and alloys thereof without the need for elevated temperatures during a subsequent curing step. The composition comprises a colloidal, water-borne polyurethane resin which is an aromatic, aliphatic or alicyclic copolymer. The composition is curable at ambient temperatures but may include a cross-linking agent as well as a thermosetting catalyst. The process comprises the steps of anodizing the component to be coated, applying the coating composition at elevated temperatures to thereby simultaneously seal and prime the component and curing the sealed and primed component at ambient temperatures. If cross-linking agents are employed then elevated cure temperatures are utilized.

Abstract: A process is described for sealing anodic coatings on aluminum and the alloys of aluminum while simultaneously impregnating the anodic coating with organic resin during the sealing operation, thereby providing a protective coating to the anodized aluminum which, among other things has superior corrosion resistant characteristics.A specified water-borne resin coating material possessing excellent stability at temperatures in excess of 200.degree. F. is used to convert the unsealed anodic coating to the monohydrate/trihydrate form of aluminum oxide during the sealing step of an otherwise conventional aluminum anodizing process. Subsequently, the sealed anodic film is cured at temperatures up to 500.degree. F. This process provides a total protection system having characteristics superior to separately sealed and organically primed aluminum obtained through conventional processing.

Abstract: Described is a method for protecting metallic substrates which comprises applying thereto silicon containing compositions produced by the steps of:1. providing a mixture of an organo silicate or a partial hydrolysate thereof in a solvent therefor;2. adding a weak acid to said mixture and maintaining the pH acidic, preferably at a range from about 1 to about 4;3. partially hydrolyzing the mixture; and4. adding a strong acid to said mixture to further hydrolyze the mixture; and curing the composition.The composition may contain also glass flakes.

Abstract: Described is a method for producing inorganic silicon containing compositions of improved stability and hardness comprising the steps of:1. providing a mixture of an organo silicate or a partial hydrolysate thereof in a solvent therefor;2. adding a weak acid to said mixture and maintaining the pH acidic, preferably at a range from about 1 to about 4;3. partially hydrolyzing the mixture; and4. adding a strong acid to said mixture to further hydrolyze the mixture.The product of the process is used in inorganic galvanic action coating compositions as well as used with glass flake containing compositions.