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Water soluble or dispersible film covered alkaline composition

  • US 5,316,688 A
  • Filed: 05/14/1991
  • Issued: 05/31/1994
  • Est. Priority Date: 05/14/1991
  • Status: Expired due to Term
First Claim
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1. A multidose alkaline cleaning article comprising:

  • (a) a solid detergent composition having a pH greater than 10.5 when diluted to a 1 wt-% aqueous solution said detergent comprising a source of alkalinity, said alkalinity source selected from the group consisting of a silicate, an alkali metal hydroxide, a phosphate, a carbonate, and mixtures thereof; and

    (b) a continuous multilayer polymeric film, dispersible or soluble in aqueous liquids, covering the solid detergent composition, said multilayer film comprising an inner alkaline pH stable and aqueous soluble film and an outer layer resistant to aqueous dissolution and effective in providing mechanical strength wherein said multilayer film remains mechanically stable and aqueous soluble or dispersible after exposure to the solid detergent composition.

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