Encapsulation particles
First Claim
1. Encapsulated potassium dichloroisocyanurate in particulate form, said particles having thereon an inner and an outer coating, said inner coating comprising a saturated fatty acid from 12 to 20 carbon atoms, or mixtures thereof, and said outer coating comprising a sodium salt of said acid, or mixtures thereof, said particles of potassium dichloroisocyanurate having said inner coating being completely encapsulated by said sodium salt.
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Accused Products
Abstract
Particles of a fluidizable substance are coated with a complete and continuous coating by a process wherein a non-aqueous solution of a coating substance is sprayed from a nozzle downwardly on a fluidized bed of the particles to be coated, the nozzle height being adjusted so that the liquid droplets of coating material would just cover the cross-sectional area of the upper surface of the bed, if sprayed on the unexpanded bed. When the aforementioned coating is a fatty acid having 12-20 carbon atoms applied to particles of a chlorine-releasing agent, and when a second coating is applied by treatment with a solution of a fixed alkali hydroxide, i.e., sodium, potassium, or calcium hydroxide, an effective, completely encapsulated, non-pinholing bleach product is obtained.
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Citations
3 Claims
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1. Encapsulated potassium dichloroisocyanurate in particulate form, said particles having thereon an inner and an outer coating, said inner coating comprising a saturated fatty acid from 12 to 20 carbon atoms, or mixtures thereof, and said outer coating comprising a sodium salt of said acid, or mixtures thereof, said particles of potassium dichloroisocyanurate having said inner coating being completely encapsulated by said sodium salt.
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2. Encapsulated particles suitable for bleaching fabrics in an aqueous medium, comprising:
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i. a core of potassium dichloroisocyanurate, ii. a primary coating of a fatty acid comprising about 55% palmitic acid and about 45% stearic acid, and iii. an outer coating of the sodium salt of said fatty acid, said primary coating and said outer coating being substantially continuous.
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3. Encapsulated particles of an oxidizing material having at least one reactive chlorine atom in its molecular structure and being selected from the group consisting of potassium dichloroisocyanurate, sodium dichloroisocyanurate, [(mono-trichloro)-tetra-(mono-potassium dichloro)] pentaisocyanurate and trichlorocyanuric acid, said particles having thereon a complete and continuous inner and outer coating, the inner coating comprising a saturated fatty acid having from 12 to 20 carbon atoms or mixtures thereof, and the outer coating comprising a sodium salt of said acid or mixtures thereof;
- said inner coating being completely encapsulated by said sodium salt.
Specification