Back to results
US 5,476,608 AGranted
Liquid laundry detergents with citric acid, cellulase, and boricdiol complex to inhibit proteolytic enzyme
AssigneeThe Procter & Gamble Company
InventorsStanton L. Boyer, Timothy J. Farwick
Life of this patent
Estimating the term…
Abstract
Liquid laundry detergent compositions containing anionic or nonionic surfactant, citric acid or a water-soluble salt thereof, proteolytic enzyme, cellulase, and a mixture of 1,2 propane diol and boric acid or its derivative. The compositions are prepared by adding the diol and boric acid before adding the citric acid/salt to the composition. This order of addition improves the stability of the cellulase.
Claims17
A liquid laundry detergent composition comprising, by weight:
- a. from about 5 to 50% of anionic or nonionic surfactant, at least about 25% of which is an ethoxylated or sugar-based surfactant;
- b. from about 1 to 10% of citric acid, or a water-soluble salt thereof;
- c. from about 1 to 20% of 1,2 propane diol;
- d. from about 0.5 to 5% of boric acid or its derivative;
- e. from 0.0001 to 1.0% of active proteolytic enzyme;
- f. from about 0.0001 to 1.0% of active cellulase enzyme;
- and
- g. from about 10 to 75% of water;
- wherein said composition is prepared by adding the 1,2 propane diol and boric acid or its derivative to the composition before adding the citric acid or salt thereof to the composition and said composition has a weight ratio of said 1,2 propane diol to boric acid or its derivatives between about 2:1 and 10:1.
6 more elements
Dependencies are inferred from the claim text.