Warewashing composition for use in automatic dishwashing machines, comprising a zinc ion and aluminum ion corrosion inhibitor
First Claim
1. A warewashing detergent composition comprising:
- (a) a cleaning agent comprising about 0.5 wt. % to about 20 wt. % surfactant based on the weight of the detergent composition;
(b) an alkaline source in an amount effective to provide a use composition having a pH of at least about 8 and obtained by diluting the warewashing detergent composition with water, and wherein the alkaline source comprises at least one of sodium hydroxide, potassium hydroxide, or mixtures thereof; and
(c) a corrosion inhibitor in an amount sufficient for reducing corrosion of glass, the corrosion inhibitor comprising;
(i) a source of aluminum ion;
(ii) a source of zinc ion; and
(iii) wherein the source of aluminum ion and the source of zinc ion are present in amounts sufficient to provide a use composition having a weight ratio of zinc ion to aluminum ion of at least about 2;
1, and wherein the composition is provided as a solid as a result of extrusion or casting, and wherein the warewashing detergent composition comprises a block having a size of at least about 5 grams.
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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.
84 Citations
38 Claims
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1. A warewashing detergent composition comprising:
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(a) a cleaning agent comprising about 0.5 wt. % to about 20 wt. % surfactant based on the weight of the detergent composition; (b) an alkaline source in an amount effective to provide a use composition having a pH of at least about 8 and obtained by diluting the warewashing detergent composition with water, and wherein the alkaline source comprises at least one of sodium hydroxide, potassium hydroxide, or mixtures thereof; and (c) a corrosion inhibitor in an amount sufficient for reducing corrosion of glass, the corrosion inhibitor comprising; (i) a source of aluminum ion; (ii) a source of zinc ion; and (iii) wherein the source of aluminum ion and the source of zinc ion are present in amounts sufficient to provide a use composition having a weight ratio of zinc ion to aluminum ion of at least about 2;
1, and wherein the composition is provided as a solid as a result of extrusion or casting, and wherein the warewashing detergent composition comprises a block having a size of at least about 5 grams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for using a warewashing detergent composition, the method comprising:
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(a) diluting a warewashing detergent composition provided as a solid as a result of extrusion or casting with water at a dilution ratio of water to warewashing detergent composition of at least about 20;
1 to form a use composition, wherein the warewashing detergent composition comprises;(i) a cleaning agent comprising about 0.5 wt. % to about 20 wt. % surfactant based on the weight of the detergent composition; (ii) an alkaline source in an amount effective to provide a use composition having a pH of at least about 8, wherein the alkaline source comprises at least one of sodium hydroxide, potassium hydroxide, or mixtures thereof; (iii) a corrosion inhibitor in an amount sufficient for reducing corrosion of glass, the corrosion inhibitor comprising a source of zinc ion and a source of aluminum ion in amounts sufficient to provide a use composition comprising zinc ion and aluminum ion at a weight ratio of zinc ion to aluminum ion of at least about 2;
1; and(b) washing ware with thc use composition in an automatic dishwashing machine. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for using a detergent composition, the method comprising:
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(a) diluting a detergent composition provided as a solid as a result of extrusion or casting with water at a dilution ratio of water to detergent composition of at least about 20;
1 to form a use composition, wherein the detergent composition comprises;(i) a cleaning agent comprising about 0.5 wt. % to about 20 wt. % surfactant based on the weight of the detergent composition; (ii) a corrosion inhibitor in an amount sufficient for reducing corrosion of glass, the corrosion inhibitor comprising a source of zinc ion and a source of aluminum ion in amounts sufficient to provide a use composition comprising zinc ion and aluminum ion at a weight ratio of zinc ion to aluminum ion of at least about 2;
1; and(iii) an alkaline source comprising at least one of sodium hydroxide, potassium hydroxide, or mixtures thereof; and (b) washing a hard surface with the use composition, wherein the hard surface comprises at least one of a window or a mirror.
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Specification