Use of amino carboxylate for enhancing metal protection in alkaline detergents
AssigneeEcolab USA Inc.
InventorsLISA MAUREEN SANDERS, ANDREW M. JENSEN, KRISTOPHER HODGSON
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Abstract
The invention includes ware detergent compositions which prevent buildup of precipitates and also surprisingly provides significant metal protection of items exposed to alkaline detergent composition. According to the invention alkaline ware detergents may include an effective amount of amino carboxylate. Surprisingly, detergents which included amino carboxylate also provided significant metal protection against corrosion, even when traditional corrosion inhibiting components are reduced.
Claims20
A solid alkaline detergent composition comprising:
- from about 0.5 wt. % to about 90 wt. % of an alkalinity source;
- from about 1 wt. % to about 7.5 wt. % of a surfactant;
- a metal protecting component comprising a silicate and an amino carboxylate, wherein said metal protecting component comprises 33.5 wt. % or less of said detergent composition.
A solid alkaline detergent composition comprising:
- from about 0.5 wt. % to about 90 wt. % of a carbonate alkalinity source;
- from about 1 wt. % to about 7.5 wt. % of one or more nonionic surfactants;
- from about 15 wt. % to about 30 wt. % of a silicate;
- from about 0.01 to about 3.5 wt. % of an amino carboxylate;
- from about 0.1 wt. % to about 15 wt. % of a corrosion inhibitor;
- form about 1 wt. % to about 10 wt. % of chelant;
- and
- from about 1 wt. % to about 10 wt. % of water.
A method of cleaning ware while preventing magnesium carbonate accumulation from hard water comprising:
- applying a detergent composition to ware surface;
- wherein the detergent composition comprises a carbonate alkalinity, a nonionic surfactant, an amino carboxylate in an amount effective for metal protection and preventing magnesium carbonate accumulation;
- and
- a silicate in an amount effective for metal protection;
- and there after rinsing said ware.
Dependencies are inferred from the claim text.