Warewashing composition comprising a Zn/Al corrosion inhibitor 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 comprised of at least 17 weight percent carbonate or bicarbonate or hydroxide 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
(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 up to about 15;
1;
(d) encapsulated chlorine bleaching agent; and
(e) less than 10 weight percent water wherein the detergent is formed into a block.
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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.
64 Citations
17 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 comprised of at least 17 weight percent carbonate or bicarbonate or hydroxide 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 (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 up to about 15;
1;(d) encapsulated chlorine bleaching agent; and (e) less than 10 weight percent water wherein the detergent is formed into a block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification