Detergent having improved color retention properties
First Claim
Patent Images
1. A laundry detergent composition consisting of:
- about 30-50 wt % of alkali metal carbonate builder;
about 0.59-1.25 wt % of an alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof having a molecular weight in the range of about 2000-3000;
about 6-15 wt % of an anionic surfactant;
about 35-45 wt % of an inert diluent selected from the group consisting of alkali metal chloride, sulfate, nitrate and mixtures thereof; and
about 0.59-1.25 wt % of a chlorine scavenger, whereby said scavenger and said alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof enable improved color retention and softness of items washed with the laundry detergent.
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Accused Products
Abstract
A carbonate-based detergent having improved properties is provided. Preferably, a base detergent includes an alkali metal carbonate builder, an anionic surfactant, an inert diluent, a copolymer, and a chlorine scavenger. The base detergent may be mixed with an agglomerate including nonionic surfactants and a builder such as an alkali metal carbonate. The detergent has improved color retention properties. A method of preparing the improved detergent composition is also provided.
60 Citations
4 Claims
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1. A laundry detergent composition consisting of:
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about 30-50 wt % of alkali metal carbonate builder; about 0.59-1.25 wt % of an alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof having a molecular weight in the range of about 2000-3000; about 6-15 wt % of an anionic surfactant; about 35-45 wt % of an inert diluent selected from the group consisting of alkali metal chloride, sulfate, nitrate and mixtures thereof; and about 0.59-1.25 wt % of a chlorine scavenger, whereby said scavenger and said alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof enable improved color retention and softness of items washed with the laundry detergent. - View Dependent Claims (2)
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3. A laundry detergent composition consisting of:
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about 30-50 wt % of alkali metal carbonate builder; about 0.59-1.25 wt % of an alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof having a molecular weight in the range of about 2000-3000; about 6-15 wt % of an anionic surfactant; about 35-45 wt % of an inert diluent selected from the group consisting of alkali metal chloride, sulfate, nitrate and mixtures thereof; about 0.18-5.0 wt % of a nonionic surfactant; and about 0.59-1.25 wt % of chlorine scavenger, whereby said scavenger and said alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof enable improved color retention and softness of items washed with the laundry detergent.
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4. A process of making a laundry detergent composition consisting of the steps of:
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mixing about 30-50 wt % of an alkali metal carbonate and about 0.59-1.25 wt % of an alkali metal salt of polyacrylic acid, polymethacrylic acid, a copolymer thereof or combinations thereof having a molecular weight of about 2000-3000, and about 6-15 wt % of an anionic surfactant producing a slurry; spray drying the slurry producing a spray-dried base; combining about 0.18 to 5.0 wt % of a nonionic surfactant and about 0.59-1.25 wt % of a chlorine scavenger to effectively scavenge chlorine in a wash liquor producing an admix; agglomerating the admix, producing an agglomerate; and
,combining the spray-dried base with the agglomerate.
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Specification
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Current AssigneeThe Dail Corporation
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Original AssigneeDial Corporation (Henkel AG & Co KGaA)
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InventorsMorgan, Ronald D., Partee, Terrell L., Morse, Elaine T., Varker, Charles
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Primary Examiner(s)Douyon, Lorna M.
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Application NumberUS08/616,731Time in Patent Office1,299 DaysField of Search510/443, 510/444, 510/452, 510/361, 510/302, 510/276, 510/478, 510/509US Class Current510/276CPC Class CodesC11D 1/143 Sulfonic acid estersC11D 1/146 Sulfuric acid estersC11D 1/22 derived from aromatic compo...C11D 1/29 Sulfates of polyoxyalkylene...C11D 1/66 Non-ionic compounds C11D1/0...C11D 11/02 Preparation in the form of ...C11D 17/06 Powder; Flakes; Free-flowin...C11D 3/0084 Antioxidants; Free-radical ...C11D 3/10 Carbonates ; BicarbonatesC11D 3/3761 in solid compositions
