Carbonate built non-bleaching laundry detergent composition containing a polymeric polycarboxylate and a zinc salt
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United States of America Patent
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Nov 12, 1996
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N/A
app pub date -
Nov 15, 1994
filing date -
Nov 15, 1994
priority date (Note) -
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Abstract
A non-bleaching laundry detergent composition, wherein the solids content comprises an active surfactant, at least about 70 wt. % of a water soluble alkaline carbonate, e.g., sodium carbonate, a minor amount of a polymeric polycarboxylate, e.g., an acrylic acid polymer, and a minor amount of elemental zinc in the form of a water soluble salt, e.g., a hydrated or anhydrous zinc sulfate, such as zinc sulfate heptahydrate or monohydrate, based on the total weight of solids in the composition. Incorporation of a polymeric polycarboxylate and zinc ions in the foregoing laundry detergent composition containing carbonate ions has the effect of significantly reducing fabric encrustation caused by the precipitation of calcium carbonate.
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