WAREWASHING COMPOSITION FOR USE IN AUTOMATIC DISHWASHING MACHINES, AND METHOD FOR USING
First Claim
1. A warewashing composition comprising:
- (a) a cleaning agent comprising a detersive amount of a surfactant;
(b) an alkaline source in an amount effective to provide a use composition having a pH of at least about 8 when the use composition is measured at a solids concentration of about 0.5 wt %; and
(c) a corrosion inhibitor in an amount sufficient for reducing corrosion of a substrate when the warewashing composition is combined with a diluent at a dilution ratio of at least about 20;
1 of diluent to warewashing composition to form a use composition, wherein the corrosion inhibitor comprises a salt of calcium, magnesium, or a mixture of calcium and magnesium, and wherein the salt has a water solubility of less than about 0.5 wt % in water at about 20°
C. and atmospheric pressure so that the salt precipitates to form a protective layer on the substrate in contact with the use composition.
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Accused Products
Abstract
A warewashing composition includes a cleaning agent having a detersive amount of a surfactant, an alkaline source in an amount effective to provide a use composition having a pH of at least about 8 when the use composition is measured at a solids concentration of about 0.5 wt %, and a corrosion inhibitor in an amount sufficient for reducing corrosion of glass when the warewashing composition is combined with water of dilution at a dilution ratio of at least about 20:1 water of dilution to detergent composition o form a use composition. The corrosion inhibitor includes a salt of calcium, magnesium, or a mixture of calcium and magnesium. The salt has a water solubility of less than about 0.5 wt % in water at about 20° C. and atmospheric pressure so that the salt precipitates to form a protective layer on a substrate in contact with the use composition.
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Citations
37 Claims
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1. A warewashing 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 a use composition having a pH of at least about 8 when the use composition is measured at a solids concentration of about 0.5 wt %; and (c) a corrosion inhibitor in an amount sufficient for reducing corrosion of a substrate when the warewashing composition is combined with a diluent at a dilution ratio of at least about 20;
1 of diluent to warewashing composition to form a use composition, wherein the corrosion inhibitor comprises a salt of calcium, magnesium, or a mixture of calcium and magnesium, and wherein the salt has a water solubility of less than about 0.5 wt % in water at about 20°
C. and atmospheric pressure so that the salt precipitates to form a protective layer on the substrate in contact with the use composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 24)
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16. A method of cleaning an article and reducing corrosion to a surface of the article comprising:
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(a) providing a warewashing composition, wherein the warewashing composition comprises; (i) a cleaning agent, wherein the cleaning agent constitutes between about 0.05 wt % and about 15 wt % of the warewashing composition; (ii) an alkaline source, wherein the alkaline source constitutes between about 5 wt % and about 40 wt % of the warewashing composition; and (iii) a corrosion inhibitor, wherein the corrosion inhibitor constitutes between about 0.01 wt % and about 15 wt % of the warewashing composition, wherein the corrosion inhibitor comprises at least one of a water soluble magnesium salt, a water insoluble magnesium salt, a water soluble calcium salt and a water insoluble calcium salt; (b) diluting the warewashing composition with a diluent to form an aqueous composition; and (c) contacting the aqueous composition to the article to clean the article and reduce corrosion to the surface of the article. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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25. A method of reducing corrosion of an article during cleaning, the method comprising:
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(a) diluting a warewashing composition with water at a dilution ratio of water to warewashing composition of at least about 20;
1 to form a use composition, wherein the warewashing composition comprises;(i) a cleaning agent comprising a detersive amount of a surfactant; (ii) an alkaline source in an amount effective to provide a use composition having a pH of at least about 8 when measured at a solids concentration of about 0.5 wt %; and (iii) a corrosion inhibitor in an amount sufficient for reducing corrosion of glass, wherein the corrosion inhibitor comprises a salt of calcium, magnesium, or a mixture of calcium and magnesium, wherein the salt has a water solubility of less than about 0.5 wt % in water at about 20°
C. and atmospheric pressure; and(b) contacting the article with the use composition in an automatic dishwashing machine, wherein the salt precipitates to form a protective layer on the article in contact with the use composition. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification