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US 4,391,725 AGranted
Controlled release laundry bleach product
AssigneeThe Procter & Gamble Company
InventorFrank P. Bossu
Life of this patent
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Abstract
A granular hydrophobic peroxyacid laundry product comprising a bleach with a surfactant bleach release agent, and an acid having a pKa of from about 2 to about 7, contained inside a pouch, bag or substrate, provides a controlled bleach release laundry product for better bleaching in a laundry wash liquor.
Claims11
A dry, granular laundry bleach-in-a-pouch product comprising:
- I. a hydrophobic peroxyacid bleach,
- II. a surfactant at level of about 5% to about 60% by weight of the peroxyacid bleach, said surfactant selected from the group consisting of peroxyacid compatible synthetic detergents and fatty acid soaps, and
- III. a water-soluble, peroxyacid compatible acid additive, said acid having a pKa of from about 2 to about 7,
- said pouch consisting of a water-insoluble but water-permeable fibrous material;
- whereby said surfactant increases the level of said bleach released from the pouch into laundry wash liquor;
- and whereby said acid additive further increases and accelerates the release of said bleach from the pouch into laundry wash liquor in the presence of said surfactant.
3 more elements
Dependencies are inferred from the claim text.