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US 5,691,292 AGranted
Thixotropic liquid automatic dishwashing composition with enzyme
AssigneeThe Procter & Gamble Company
InventorsJanet Layne Marshall, David Lee Hall, Hal Ambuter, Edward Paul Fitch
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Abstract
A viscoelastic, thixotropic, liquid automatic dishwashing detergent composition which is substantially free of chlorine bleach and silicate and contains enzyme(s), an enzyme stabilizing system, and a detergent surfactant or detergent builder is provided. It has a product pH between about 7 and about 11.
Claims20
A viscoelastic, thixotropic aqueous, liquid automatic dishwashing detergent composition comprising, by weight:
- (a) from about 0.001% to about 5% of an active detersive enzyme or enzymes;
- (b) from about 0.1% to about 10% of a viscoelastic thixotropic thickener which is a cross-linked polycarboxylate polymer having a molecular weight of 750,000 to 4,000,00 and which provides an apparent viscosity at high shear of greater than about 250 centipoise and an apparent yield value of from about 40 to about 800 dynes/cm.sup.2 to said composition;
- (c) from about 0.001% to about 10% of an enzyme stabilizing system selected from the group consisting of calcium ion, propylene glycol, short chain carboxylic acid, polyhydroxyl compounds, boric acid, boronic acid and mixtures thereof;
- (d) from about 0.01% to about 40% of a detergent surfactant or a detergent builder or mixtures thereof;
- (e) from about 0.001% to about 25% of pH adjusting agent to provide said composition with a product pH between about 7 and about 11 and
- (f) 0.01% to 0.06% of a chlorine scavenge;
- wherein said composition is low foaming and free of chlorine bleach and silicate and wherein said composition is free of clay thickening agents.
4 more elements
Dependencies are inferred from the claim text.