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US 7,067,467 B2Granted
Aqueous perborate bleach composition
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsFeng-Lung Gordon Hsu, Yun Peng Zhu, Kimball James Woelfel, Mohammad Hosseini-Nejad
Life of this patent
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Abstract
Aqueous compositions comprising a perborate salt and a polyol. The advantageous properties of the composition include increased solubility of the perborate salt, increased available oxygen stability in an aqueous environment, and the capacity to increase the pH upon the dilution. The compositions are useful for bleaching various surfaces, especially in laundry cleaning.
Claims19
A bleach composition consisting essentially of:
- (a) from about 1% to about 44%, by weight of the composition, of a perborate salt as a source of oxygen bleach;
- (b) from about 1% to about 44%, by weight of the composition of a polyol, wherein the molar ratio of the perborate salt to the polyol is from about 1:10 to about 10:1;
- (c) water in an amount of at least 55%, by weight of the composition;
- (d) optionally, a builder or an electrolyte;
- and
- (e) optionally, a surfactant;
- wherein the composition has an initial pH from 5 to 7
4 more elements
Dependencies are inferred from the claim text.