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Solid cast detergents containing encapsulated halogen bleaches and methods of preparation and use

  • US 4,681,914 A
  • Filed: 05/08/1986
  • Issued: 07/21/1987
  • Est. Priority Date: 04/30/1985
  • Status: Expired due to Term
First Claim
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1. A solid, cast detergent-bleach composition, comprising:

  • (a) at least 30 wt-%, based upon the composition, alkaline hydratable chemical;

    (b) an effective amount of a hardness-sequestrant wherein the hardness-sequestrant is different than the alkaline hydratable chemical;

    (c) about 0 to 15 wt-%, based upon the composition, polyelectrolyte wherein the polyelectrolyte is different than the alkaline hydratable chemical and the hardness-sequestrant;

    (d) at least 5 wt-%, based upon the alkaline hydratable chemical, water of hydration; and

    (e) about 0.5 to 25 wt-%, based upon the composition, randomly dispersed encapsulated bleach particles, comprising;

    (i) about 20 to 90 wt-%, based upon the encapsulated bleach particles, core which comprises a source of active-halogen bleach;

    (ii) about 0 to 50 wt-%, based upon the encapsulated bleach particles, first coating which comprises a soluble inorganic coating agent; and

    (iii) about 10 to 80 wt-%, based upon the encapsulated bleach particles, second coating which comprises a synthetic detergent.

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