Rapidly dissolving and storage stable titanium phosphate containing activating composition
AssigneeHenkel Corporation
InventorGerald J. Cormier
Life of this patent
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Abstract
An otherwise conventional Jernstedt salt dispersion for activating metal surfaces to improve the quality of subsequently deposited phosphate conversion coatings on the activated metal surface is stabilized against deterioration in storage for at least six months by utilizing in the dispersion a mixture of sodium and potassium salts, preferably condensed phosphate salts, in such amounts that the ratio of potassium to titanium is within the range from 8.0:1.0 to 40:1.0 and the ratio of potassium to sodium is within the range from 0.9:1.0 to about 2.5:1.0.
Claims20
A liquid activating concentrate consisting essentially of water and:
- (A) a component of dispersed Jernstedt titanium phosphate salt or salts;
- (B) a component of dissolved sodium salt or salts;
- and
- (C) a component of dissolved potassium salt or salts;
- and, optionally, one or more of the following:
- (D) a component of thickening agent;
- and
- (E) a conventional alkaline metal cleaner component, wherein in said liquid activating concentrate the ratio of potassium to titanium is within the range from about 8.0:1.0 to about 40:1.0 and the ratio of potassium to sodium is within the range from about 0.9:1.0 to about 2.5:1.0.
A powdered solid mixture consisting essentially of:
- (A) a component of Jernstedt titanium phosphate salt or salts;
- (B) a component of water soluble sodium salt or salts;
- and
- (C) a component of water soluble potassium salt or salts;
- and, optionally, one or more of the following:
- (D) a component of thickening agent;
- and
- (E) a conventional alkaline metal cleaner component,
- wherein in said powdered solid mixture the ratio of potassium to titanium is within the range from about 8.0:1.0 to about 40:1.0 and the ratio of potassium to sodium is within the range from about 0.9:1.0 to about 2.5:1.0.
Dependencies are inferred from the claim text.