Warewashing composition comprising zinc and aluminum ions for use in automatic dishwashing machines
First Claim
1. A warewashing detergent composition comprising:
- (a) a cleaning agent comprising a detersive amount of a surfactant;
(b) an alkaline source in an amount effective to provide the warewashing detergent composition with a pH of at least about 8, and wherein the alkaline source comprises at least one of sodium hydroxide, potassium hydroxide, or mixtures thereof; and
(c) between about 6 ppm and about 300 ppm of a corrosion inhibitor for reducing corrosion of glass, the corrosion inhibitor comprising a zinc ion and aluminum ion at a weight ratio of the zinc ion to the aluminum ion of at least about 2;
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Accused Products
Abstract
A warewashing detergent composition is provided according to the invention. The warewashing detergent composition includes a cleaning agent, an alkaline source, and a corrosion inhibitor. The cleaning agent comprises a detersive amount of a surfactant. The alkaline source is provided in an amount effective to provide a use composition having a pH of at least about 8. The corrosion inhibitor includes a source of aluminum ion and a source of zinc ion. The relative amounts of the source of zinc ion and the source of aluminum ion can be controlled to reduce visible filming when the warewashing detergent composition is used in the presence of hard water. Methods for using and manufacturing a warewashing detergent composition are provided.
78 Citations
18 Claims
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1. A warewashing detergent composition comprising:
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(a) a cleaning agent comprising a detersive amount of a surfactant; (b) an alkaline source in an amount effective to provide the warewashing detergent composition with a pH of at least about 8, and wherein the alkaline source comprises at least one of sodium hydroxide, potassium hydroxide, or mixtures thereof; and (c) between about 6 ppm and about 300 ppm of a corrosion inhibitor for reducing corrosion of glass, the corrosion inhibitor comprising a zinc ion and aluminum ion at a weight ratio of the zinc ion to the aluminum ion of at least about 2;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification