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Warewashing composition for use in automatic dishwashing machines, comprising a mixture of aluminum and zinc ions

  • US 7,135,448 B2
  • Filed: 07/02/2003
  • Issued: 11/14/2006
  • Est. Priority Date: 07/02/2003
  • Status: Expired due to Term
First Claim
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1. A warewashing detergent composition comprising:

  • (a) a cleaning agent comprising about 0.5 wt. % to about 20 wt. % surfactant based on the weight of the detersive composition;

    (b) an alkaline source in an amount effective to provide a use solution having a pH of at least about 8 and wherein said use solution is obtained by diluting the warewashing detergent composition with water;

    (c) a corrosion inhibitor in an amount sufficient for reducing corrosion and/or reducing the etching of glass, the corrosion inhibitor comprising;

    (i) a source of aluminum ion;

    (ii) a source of zinc ion,wherein the amount of the source of aluminum ion and the source of zinc ion is sufficient to provide a weight ratio of aluminum ion to zinc ion of about 6;

    1 to about 1;

    20; and

    (d) encapsulated chlorine bleaching agent.

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