Encapsulated halogen bleaches and methods of preparation and use
First Claim
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1. An encapsulate halogen bleach composition that is chemically stable and compatible when combined with an alkaline cleaning composition and does not interfere with the action of the cleaning composition, the capsule comprising:
- (a) a halogen bleach core; and
(b) an encapsulating coating effective to isolate the core, wherein the core comprises about 20 to 90 wt-% of the encapsulate composition and the coating comprises about 10 to 80 wt-% of the encapsulate composition, said coating comprising,(i) a first coating layer of an inorganic agent coated over said bleach core, and(ii) a second coating layer of an n-alkyl sulfonate compound coated over said inorganic agent.
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Abstract
An active-halogen bleach such as dichloroisocyanurate dihydrate encapsulated in a coating of a synthetic detergent such as sodium octyl sulfonate. The capsule may further comprise an initial coating of a soluble inorganic detergent builder or filler. The capsule is table in highly alkaline environments such as detergent composition.
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Citations
28 Claims
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1. An encapsulate halogen bleach composition that is chemically stable and compatible when combined with an alkaline cleaning composition and does not interfere with the action of the cleaning composition, the capsule comprising:
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(a) a halogen bleach core; and (b) an encapsulating coating effective to isolate the core, wherein the core comprises about 20 to 90 wt-% of the encapsulate composition and the coating comprises about 10 to 80 wt-% of the encapsulate composition, said coating comprising, (i) a first coating layer of an inorganic agent coated over said bleach core, and (ii) a second coating layer of an n-alkyl sulfonate compound coated over said inorganic agent. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. An encapsulate chlorine bleach composition that is chemically stable and compatible when combined with an alkaline cleaning composition, and does not interfere with the action of the cleaning composition, the capsule comprising a chlorine bleach core and two encapsulating coatings effective to isolate the core, wherein the core comprises about 20 to 89.5 wt-% of the encapsulate composition, the first coating, which is a soluble inorganic coating agent comprises about 0.5 to 50 wt-% of the encapsulate composition, and the second coating comprises an n-alkyl sulfonate compound at a concentration of about 10 to 70 wt-% of the encapsulate composition.
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14. A chlorine bleach composition compatible in a cleaning composition, that neither degrades the active components of the cleaning composition or interferes with their action, which consists of an encapsulated composition having a core and two encapsulating coatings effective to isolate the active halogen, wherein:
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(a) the core comprises a particle of dichloroisocyanurate dihydrate having a particle size of-- 10 to 60 U.S. mesh; (b) the first coating consists of about 15 to 45 wt. % of a mixture of about 10 to 40 wt. % sodium tripolyphosphate and about 60 to 90 wt. % sodium sulfate based upon the composition; and (c) the second coating consists of about 10 to 35 wt. % of a sodium octyl sulfonate based upon the composition.
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15. A process for encapsulating a halogen bleach which comprises the steps of:
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(a) forming a fluidized bed of an active halogen core material comprising a source of active halogen having a particle size of about 8 to 120 U.S. mesh; (b) forming a first coating of a soluble inorganic coating agent on the particles in the bed; and (c) forming a second coating of an n-alkyl sulfonate compound which is substantially inert with respect to the halogen bleach core, on the particles in the bed; whereby the coating renders the halogen bleach core stable in an alkaline environment. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A process for encapsulating a halogen bleach which comprises the steps of:
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(a) forming a fluidized bed of a core material, wherein the core material comprises an active halogen component having a particle size of about 8 to 120 U.S. mesh; (b) forming a first coating of a soluble inorganic coating agent, which is substantially inert with respect to the halogen bleach core, on the particles in the bed; and (c) forming a second coating of an n-alkyl sulfonate compound, which is substantially inert with respect to the halogen bleach core and the first coating, on the particles in the bed, whereby the coating renders the halogen bleach core stable in an alkaline environment. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification