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US 4,830,773 AGranted
Encapsulated bleaches
AssigneeEcolab Inc.
InventorKeith E. Olson
Life of this patent
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Abstract
Stable encapsulated bleach comprising a core of bleaching agent such as an alkaline metal salt of chloroisocyanurate, an inner coating of a chemically compatable separating compound such as sodium sulfate, sodium tripolyphosphate and mixtures thereof, and an outer coating of a water soluble cellulose ether such as hydroxyethyl and hydroxypropyl celluloses.
Claims17
An encapsulated bleach particle, comprising:
- (a) a bleaching agent core;
- (b) an inner coating of a separating compound in an amount sufficient to retard any chemical interaction between the bleaching agent core and an outer coating compound;
- and
- (c) an outer coating of encapsulating amount of a water soluble cellulose ether compound selected from the group consisting of (C.sub.1-4) alkyl cellulose, carboxy (C.sub.1-4) alkyl cellulose, hydroxy (C.sub.1-4) alkyl cellulose, carboxy (C.sub.1-4) alkyl hydroxy (C.sub.1-4) alkyl cellulose, C.sub.1-4) alkyl hydroxy (C.sub.1-4) alkyl cellulose, and mixtures thereof.
1 more element
An encapsulated bleach particle, comprising:
- (a) about 20-90 wt-% core of an active chlorine source;
- (b) about 5-60 wt-% inner coating of a detergent builder or filler surrounding and in physical contact with the core;
- and
- (c) about 1-25 wt-% outer encapsulating coating of a hydroxy (C.sub.1-4) alkyl cellulose which is physically separated from the core of active chlorine source by the inner coating.
1 more element
Dependencies are inferred from the claim text.