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US 10,472,596 B2Granted
Non-phosphorous transition metal control in laundry applications
AssigneeEcolab USA Inc.
InventorsJason Lang, Jimmy Stokes, Carter M. Silvernail, David Dotzauer, Steven Lundberg, Krista Otting
Life of this patent
Estimating the term…
Abstract
Methods and compositions for improving laundry quality in multiple areas including detergency, bleaching and wastewater operations are provided by a laundry additive composition. The laundry additive composition and methods of using the composition control iron and other transition metals in water utilized within laundry applications.
Claims16
A method for treating laundry comprising:
- contacting the laundry with a laundry additive composition comprising:
- a) a gluconate chelant;
- b) at least one aminocarboxylate or salt thereof, wherein the at least one aminocarboxylate or salt thereof comprises methyl glycine diacetic acid and/or diethylenetriaminepentaacetic acid;
- c) at least about 16 wt-% of a carboxylate polymer selected from the group consisting of a polyacrylate polymer, a polyacrylic acid, a polymaleic acid, salt thereof, or combination thereof, wherein the ratio of the gluconate chelant to the carboxylate polymer is from about 1:1 to about 3:1;
- and
- d) water, wherein:
- i) the composition is substantially phosphorous-free;
- ii) the contacting between the laundry additive and the laundry occurs before a bleaching step or together with a bleaching step;
- and
- iii) the laundry additive composition controls transition metal contaminants throughout the laundry process under alkaline to acid pH conditions and optionally in the presence of oxidizers.
7 more elements
A laundry additive composition comprising:
- a) a gluconate chelant;
- b) at least one aminocarboxylate or salt thereof, wherein the at least one aminocarboxylate or salt thereof comprises methyl glycine diacetic acid and/or diethylenetriaminepentaacetic add;
- c) at least about 16 wt-% of a carboxylate polymer selected from the group consisting of a polyacrylate polymer, a polyacrylic add, a polymaleic acid, salt thereof, or combination thereof, wherein the ratio of the gluconate chelant to the carboxylate polymer is from about 1:1 to about 3:1;
- and
- d) water, wherein the composition is substantially phosphorous-free.
2 more elements
Dependencies are inferred from the claim text.