Automatic dishwashing compositions and methods for use with electrochemical cells and/or electrolytic devices

• US 7,816,314 B2
• Filed: 06/01/2006
• Issued: 10/19/2010
• Est. Priority Date: 05/17/2002
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Drzewiecki, Paul Joseph, Price, Kenneth Nathan, Scheper, William Michael, Tremblay, Mario Elmen
• Primary Examiner(s): Boyer; Charles I
• Application Number:
  US11/444,666
• Publication Number:
  US 20060217280A1
• Time in Patent Office: 1,601 Days
• Field of Search: 510/220, 510/224, 510/226, 510/298, 510/379, 510/382, 510/445, 510/446, 510/480, 510/514
• US Class Current: 510/224
• CPC Class Codes: A47L 15/0002 Washing processes, i.e. machine working principles characterised by phases or operational steps
• CPC Class Codes: A47L 15/4238 by using electrolytic cells
• CPC Class Codes: A47L 15/4291 Recovery arrangements, e.g. for the recovery of energy or water
• CPC Class Codes: A47L 2601/06 Electrolysed water
• CPC Class Codes: A61L 2/035 Electrolysis
• CPC Class Codes: C11D 17/003 Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
• CPC Class Codes: C11D 2111/14 Hard surfaces
• CPC Class Codes: C11D 2111/44 Multi-step processes
• CPC Class Codes: C11D 2111/46 applying energy, e.g. irradiation
• CPC Class Codes: C11D 3/046 Salts
• CPC Class Codes: C11D 3/386 Preparations containing enzymes , e.g. protease or amylase
• CPC Class Codes: C11D 3/3953 Inorganic bleaching agents C11D3/3951 takes precedence
• CPC Class Codes: C11D 3/3956 Liquid compositions

Abstract

The present invention relates to automatic dishwashing detergent compositions and methods of using compositions comprising halogenated salts, phosphate and/or silicate in conjunction with electrolyzed water in automatic dishwashing appliances comprising an electrochemical cell and/or electrolytic device for treating tableware to improve cleaning, sanitizing and stain removal by controlling hardness, corrosion and dispersancy.

Claims

1. A method for cleaning, sanitizing, and/or removing stains from tableware comprising the steps of:

A) forming an aqueous solution from a solid controlled release automatic dishwashing composition comprising;

(a) at least about 0.1%, by weight of the composition, of a halogenated salt which is calcium chloride or magnesium chloride;

(b) a component selected from the group consisting of a builder, suds suppressor, perfume, enzyme, bleach-scavenging agent, a metal-protecting agent, and mixtures thereof;

(c) a dissolution control material; and

(d) at least one adjunct ingredient;

wherein said automatic dishwashing composition is free of bleach, and is in the form of a solid controlled release pill or tablet housed in a porous basket;

B) allowing said aqueous solution to pass into an electrochemical cell and/or electrolytic device during the wash and/or rinse cycle, thereby forming an electrolytic solution comprising halogenated mixed oxidants; and

C) contacting tableware with said electrolytic solution.

2. A method according to claim 1, wherein said halogenated salt is present at a level of greater than about 0.1% by weight of the composition.

3. A method according to claim 2, wherein said salt is present at a level of greater than about 0.5% by weight of the composition.

4. A method according to claim 2, wherein said salt is present at a level of greater than about 1.0% by weight of the composition.

5. A method according to claim 1, wherein said solid controlled automatic dishwashing composition provides a controlled release of steady levels of said halogenated salt into the wash and/or rinse liquors during operation of an automatic dishwasher over a period of from 1 day to 365 days of regular household and/or commercial use.

6. A method according to claim 5, wherein said porous basket comprises a material selected from the group consisting of glass, plastic, ceramic, metal, and combinations thereof.

7. A method according to claim 1, wherein said bleach-scavenging agent comprises a compound selected from the group consisting of ascorbic acid or derivatives thereof, carbamate, ammonium, sulfite, bisulfite, aluminum tristearate, sodium silicate, benzotriazole, amines, amino acids, and mixtures thereof.

8. A method according to claim 1 wherein said adjunct ingredient is selected from the group consisting of nanoparticles, functionalized surface molecules, polymers, surfactants, co-surfactants, metal ions, proteins, dyes, acids, bases, organic solvents, enzymes, enzyme stabilizing systems, chelants, optical brighteners, soil release agents, wetting agents, dispersants, blooming perfumes, colorants, filler salts, hydrotropes, preservatives, anti-oxidants, germicides, fungicides, color speckles, silvercare, anti-tarnishing agents, alkalinity sources, solubilizing agents, carriers, electrode maintenance and/or descaling agents, processing aids, pigments, and pH control agents, and mixtures thereof.

9. A method according to claim 2 wherein said builder is selected from the group consisting of phosphate, phosphate oligomers or polymers and salts thereof, silicate oligomers or polymers and salts thereof, aluminosilicates, magnesioaluminosiliates, citrate, and mixtures thereof.

10. A method according to claim 9, further comprising a chelant selected from the group consisting of EDTA, tetraacetyl ethylene diamine (TAED), EDDS, aminophosphonates, aminocarboxylates, carboxylatephosphonates, aluminosilicates, magnesioaluminosiliates, polyfunctionally-substituted aromatic chelating agents, and mixtures thereof.

11. A method according to claim 1, wherein said perfume is from about 0.01% to about 5%, by weight, a blooming perfume composition, wherein said blooming perfume composition comprises from about 50% to about 99% of blooming perfume ingredients having a boiling point of less than about 260°

C. and a ClogP of at least about 3, and wherein said blooming perfume composition comprising at least about 5 different blooming perfume ingredients, and from about 0.5% to about 10% of base masking perfume ingredients having a boiling point of more than about 260°

C. and a ClogP of at least about 3.