Shaped solid bleach with encapsulate source of bleach

Details Shaped solid bleach with encapsulate source of bleach Shaped solid bleach with encapsulate source of bleach

1993-02-26

1995-04-18

Lovering, Richard D.

Compositions

Oxidative bleachant, oxidant containing, or generative

Composition containing a stabilizer or a product in the form...

252 90, 252 99, 25217413, 25218625, 42721331, 42840224, C01B 701, C01B 1106

Patent

active

054075980

ABSTRACT:
Aqueous bleach solutions can be made by directing a spray of water onto a bulk or shaped solid (brick, tablet, block, etc.) comprising a continuous solid phase of an encapsulated source of an active halogen bleach or a solid comprising a source of an oxidizing active halogen bleach and an encapsulated oxidizing halogen bleach source. Such shaped solids can be used to dispense uniform quantities of an aqueous bleach concentrate to bleaching locus such as a washing machine. The tablets can be made from the encapsulated bleach or from a powder mixture of a particulate, granulated or powdered unencapsulated source of active oxidizing bleach and an encapsulated source of active oxidizing bleach by forming the powder mixture into a desired shape. The presence of the encapsulate in the solid with the powder reduces the tendency of the solid to absorb water which can be wicked through the solid to pass water through the solid into adjacent solids. Substantial proportions of absorbed water can cause the tablets to crack, crumble and to periodically dispense uneven, substantially large and undesirable concentrations of active bleach into a wash or bleach cycle.

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