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US 4,728,453 AGranted
Timed-release bleach coated with an inorganic salt and an amine with reduced dye damage
AssigneeThe Clorox Company
InventorClement K. Choy
Life of this patent
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Abstract
Delayed-release hypohalite bleach compositions are provided which include encapsulates having a granular, hypohalite-releasing core and a coating delaying release of hypohalite ion and scavenging hypohalite ion when the encapsulates are exposed to an aqueous solution. The coating must include an amine compound with limited solubility in water. The core preferably includes a dihalodialkyl hydantoin and the coating an amine having a saturated hydrocarbon carbon of about 6 to about 24 carbon atoms.
Claims10
A delayed-release hypohalite bleach comprising:
- a halogen-substituted hydantoin capable of releasing hypohalite ion, the hydantoin forming a granular core;
- a substantially water soluble inorganic salt coated on the granular core and being in an amount from about 0.5 wt. % about 50 wt % of the total composition;
- and
- a substituted amine coated on the inorganic salt and having limited solubility in water at 25.degree. C. of from about 0.001 wt. % to about 5 wt. %, and being in an amount from about 0.5 wt. % to about 50 wt. % of the total composition the amine being substituted with a hydrocarbon moiety having at least 5 carbon atoms.
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Dry delayed-release bleach encapsulates comprising:
- a halogen-substituted isocyanurate or hydantoin forming a granular core of the encapsulates;
- a substantially water-soluble inorganic salt coated on the granular core and being in an amount from about 0.5 wt. % to about 50 wt. % of the encapsulates;
- and
- a substituted amine coated on the inorganic salt having a solubility in water at 25.degree. C. of from about 0.001 wt. % to about 5 wt. %, and being in an amount from about 0.5 wt. % to about 50 wt. % of the encapsulates.
1 more element
Dependencies are inferred from the claim text.