Method and composition for bleaching laundry
AssigneeAtochem
InventorsBernard Dubreux, Francoise Chosson
Life of this patent
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Abstract
Bleaching laundry in a bath using a peroxidized compound characterized in that bleaching is carred out at a pH of between 10.5 and 12.5 in the presence of calcium peroxide (CaO.sub.2) as the peroxidized compound, introduced in the hydrated or the anhydrous form so that the quantity of calcium per liter of bath is between 1.times.10.sup.-3 and 1.times.10.sup.-2 gram-atom.
Claims12
A method for bleaching laundry in a bath in the absence of any peroxide activator consisting essentially of introducing into said bath as the only bleaching agent a peroxidized compound and carrying out said bleaching at a pH of between 10.5 and 12.5 and at a temperature between about 30.degree. and 60.degree. C.;
- said peroxidized compound being a calcium peroxide in the hydrated or the anhydrous form and introduced so that the quantity of calcium per liter of bath is between 1.times.10.sup.-3 and 1.times.10.sup.-2 gram atom.
A composition consisting essentially of a detergent and a calcium peroxide in the hydrated or the anhydrous form in a quantity which permits the preparation of a bath which contains, at a pH of between 10.5 and 12.5, 1.times.10.sup.-3 to 1.times.10.sup.-2 gram-atom of calcium per liter.
Dependencies are inferred from the claim text.