Use of amino carboxylate for enhancing metal protection in alkaline detergents
AssigneeEcolab USA Inc.
InventorsLisa Maureen Sanders, Andrew M. Jensen, Kristopher Hodgson
Life of this patent
Estimating the term…
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.
Claims18
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;
- and
- a metal protecting component comprising from about 30 wt. % to about 70 wt. % of a silicate and from about 0.1 wt. % to about 3.5 wt. % of an amino carboxylate, wherein said amino carboxylate is one or more of ethanoldiglycine, trisodium methylgylcinediacetic acid (MGDA);
- iminodisuccinic acid;
- iminodisuccinic acid sodium salt N,N-bis (carboxylatomethyl)-L-glutamic acid (GLDA);
- iminodisuccinic acid sodium salt (GLDA-Na4);
- [S—S]-ethylenediaminedisuccinic acid (EDDS);
- 3-hydroxy-2,2′-iminodisuccinic acid (HIDS), tetrasodium 3-hydroxy-2,2′-iminodisuccinate, wherein said detergent composition does not include an enzyme and wherein said detergent composition does not include an active oxygen bleaching agent.
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 30 wt. % to about 70 wt. % of a silicate;
- from about 0.01 to about 3.5 wt. % of an amino carboxylate, wherein said amino carboxylate is one or more of ethanoldiglycine, trisodium methylgylcinediacetic acid (MGDA);
- iminodisuccinic acid;
- iminodisuccinic acid sodium salt N,N-bis (carboxylatomethyl)-L-glutamic acid (GLDA);
- iminodisuccinic acid sodium salt (GLDA-Na4);
- [S—S]-ethylenediaminedisuccinic acid (EDDS);
- 3-hydroxy-2,2′-iminodisuccinic acid (HIDS), tetrasodium 3-hydroxy-2,2′-iminodisuccinate;
- from about 0.1 wt. % to about 15 wt. % of an additional corrosion inhibitor;
- and
- from about 20 wt. % to about 50 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 of from about 0.1 wt. % to about 3.5 wt. %, wherein said amino carboxylate is one or more of ethanoldiglycine, trisodium methylgylcinediacetic acid (MGDA);
- iminodisuccinic acid;
- iminodisuccinic acid sodium salt N,N-bis (carboxylatomethyl)-L-glutamic acid (GLDA);
- iminodisuccinic acid sodium salt (GLDA-Na4);
- [S—S]-ethylenediaminedisuccinic acid (EDDS);
- 3-hydroxy-2,2′-iminodisuccinic acid (HIDS), tetrasodium 3-hydroxy-2,2′-iminodisuccinate;
- and
- a silicate in an amount of from about 30 wt. % to about 70 wt. %, wherein said detergent composition does not include an enzyme, wherein said detergent composition does not include an active oxygen bleaching agent;
- and there after rinsing said ware.
Dependencies are inferred from the claim text.