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US 3,939,100 AGranted
Combination alkali metal pyrophosphate-alkaline earth metal pyrophosphate detergent builder
AssigneeThe Procter & Gamble Company
InventorsThomas J. Hau, Steven D. Cherney
Life of this patent
Estimating the term…
Abstract
Alkali metal pyrophosphates and alkaline earth metal pyrophosphates are combined to provide a builder system for detergent compositions.
Claims19
A detergent additive comprising:
- a. an alkali metal pyrophosphate;
- and
- b. an alkaline earth metal pyrophosphate having
- a mean particle diameter of less than 25 microns;
- in a weight ratio of the alkali metal pyrophosphate to the alkaline earth metal pyrophosphate of from about 60:1 to about 1:8.
2 more elements
A detergent composition comprising:
- a. from about 5% to about 60% by weight of an alkali metal pyrophosphate;
- b. from about 1% to about 50% by weight of an alkaline earth metal pyrophosphate having a mean particle diameter of less than 25 microns and
- c. from about 2% to about 40% by weight of an organic detergent surfactant component.
Dependencies are inferred from the claim text.