Curable coating compositions for stainless steel
AssigneeNeely Industries, Inc.
InventorJames E. Neely, Jr.
Life of this patent
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Abstract
An aqueous, curable coating composition comprising a mixture of: (a) at least one water-soluble alkali metal silicate and (b) an effective amount of a water-soluble crosslinking agent comprising an alkali metal aluminophosphate, or an alkali metal aluminoborophosphate, or an ammonia aluminophosphate, or an ammonia aluminoborophosphate, or an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate, or a mixture of two or more of the foregoing phosphates. The coating composition will often not contain any visually discernible precipitate. The coating composition may be applied to a substrate, such as a glass, a ceramic, concrete or a metal and thereafter cured by air drying or by heating to a temperature of up to about 240° C. (or higher, if desired).
Claims52
A method of coating a stainless steel substrate comprising applying to the stainless steel substrate an aqueous coating composition comprising a mixture of:
- (a) at least one water-soluble alkali metal silicate;
- and
- (b) an effective amount of a water-soluble crosslinking agent comprising an alkali metal aluminophosphate, an alkali metal aluminoborophosphate, an ammonia aluminophosphate, an ammonia aluminoborophosphate, an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate or a mixture of two or more of the foregoing phosphates.
A coated stainless steel comprising:
- (a) a stainless steel substrate;
- and
- (b) a coating film formed by:
- (1) applying to the stainless steel substrate an aqueous coating composition comprising a mixture of:
- (i) at least one water-soluble alkali metal silicate;
- and
- (ii) an effective amount of a water-soluble crosslinking agent comprising an alkali metal aluminophosphate, an alkali metal aluminoborophosphate, an ammonia aluminophosphate, an ammonia aluminoborophosphate, an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate or a mixture of two or more of the foregoing phosphates;
- and
- (2) curing the coating composition in (1) by subjecting the coated stainless steel substrate to curing by air or heating to a temperature sufficient to cure the coating composition.
Dependencies are inferred from the claim text.