Combination of soluble lithium salt and soluble aluminum or silicate salt as a glass etching inhibitor
First Claim
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1. A warewashing detergent composition comprising:
- (a) between about 5% by weight and 75% by weight of an alkalinity source; and
(b) between about 0.1% by weight and 2.5% by weight of a glass corrosion inhibitor comprising a soluble lithium salt and at least one of a soluble aluminum salt and a soluble silicate salt,wherein if a soluble aluminum salt is present, the soluble aluminum salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble aluminum salt to soluble salt of between about 410;
1 and about 1;
10, andwherein if a soluble silicate salt is present, the soluble silicate salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble silicate salt to soluble lithium salt of between about 40;
1 and about 1;
40.
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Abstract
A warewashing detergent composition is provided including an alkalinity source, a corrosion inhibitor and optionally, a cleaning agent. The glass corrosion inhibitor includes at least a soluble lithium salt and optionally includes a soluble aluminum salt and/or a soluble silicate salt. The warewashing detergent composition has a pH of at least about 8.
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Citations
22 Claims
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1. A warewashing detergent composition comprising:
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(a) between about 5% by weight and 75% by weight of an alkalinity source; and (b) between about 0.1% by weight and 2.5% by weight of a glass corrosion inhibitor comprising a soluble lithium salt and at least one of a soluble aluminum salt and a soluble silicate salt, wherein if a soluble aluminum salt is present, the soluble aluminum salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble aluminum salt to soluble salt of between about 410;
1 and about 1;
10, andwherein if a soluble silicate salt is present, the soluble silicate salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble silicate salt to soluble lithium salt of between about 40;
1 and about 1;
40. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for using a warewashing detergent composition, the method comprising:
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(a) diluting a warewashing detergent composition with water at a dilution ratio of at least about 20;
1 water to warewashing detergent composition to form a use solution, wherein the warewashing detergent composition comprises;(i) between about 0.5% by weight and about 20% by weight cleaning agent; (ii) between about 5% by weight and 75% by weight of an alkalinity source; and (iii) between about 0.1% by weight and 2.5% by weight of a glass corrosion inhibitor, the corrosion inhibitor comprising a soluble lithium salt and at least one of an soluble aluminum salt and a soluble silicate salt; and (b) washing glassware with the use solution in an automatic dishwashing machine, wherein if a soluble aluminum salt is present, the soluble aluminum salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble aluminum salt to soluble salt of between about 410;
1 and about 1;
10, andwherein if a soluble silicate salt is present, the soluble silicate salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble silicate salt to soluble lithium salt of between about 40;
1 and about 1;
40. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A solid detergent composition formed by the process comprising:
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combining a glass corrosion inhibitor with an alkalinity source, wherein the glass corrosion inhibitor comprises soluble lithium salt, at least one of a soluble aluminum salt and a soluble silicate salt to form a mixture; and forming a solid detergent composition from the mixture, wherein the solid detergent composition comprises between 0.1 and 2.5 wt % of the corrosion inhibitor, wherein if a soluble aluminum salt is present, the soluble aluminum salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble aluminum salt to soluble salt of between about 410;
1 and about 1;
10, andwherein if a soluble silicate salt is present, the soluble silicate salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble silicate salt to soluble lithium salt of between about 40;
1 and about 1;
40.
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18. A use solution for washing glassware, the use solution comprising:
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an alkalinity source; and between about 0.01 ppm and about 300 ppm of a glass corrosion inhibitor comprising a soluble lithium salt and at least one of a soluble aluminum salt and a soluble silicate salt; wherein the use solution has a pH of at least about 8, and wherein if a soluble aluminum salt is present, the soluble aluminum salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble aluminum salt to soluble salt of between about 410;
1 and about 1;
10, andwherein if a soluble silicate salt is present, the soluble silicate salt and the soluble lithium salt are present in an amount sufficient to provide a weight ratio of soluble silicate salt to soluble lithium salt of between about 40;
1 and about 1;
40. - View Dependent Claims (19, 20, 21, 22)
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Specification