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US 6,602,837 B1Granted
Liquid automatic dishwashing detergent composition containing diacyl peroxides
AssigneeThe Procter & Gamble Company
InventorRashesh Naresh Patel
Life of this patent
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Abstract
Alkaline liquid detergent compositions comprising a diacyl peroxide, solvent and chelant are disclosed. The solvent is preferably selected based upon the solubility parameter of the diacyl peroxide present. Preferred compositions are for use in automatic dishwashing detergents, are substantially phosphate free and contain detersive enzymes. The compositions are effective in removing stains, especially carotenoid, under various temperature and pH conditions from plastics.
Claims22
A liquid, alkaline detergent composition, comprising, by weight of said composition:
- a) from about 0.01% to about 10% of particles comprising diacyl peroxide,
- b) from about 20% to about 90% solvent having a solubility parameter value outside about ±4 of said diacyl peroxide's solubility parameter, and
- c) from about 0.01% to about 10% chelant, said chelant selected from the group consisting of sodium, potassium, lithium, ammonium, and substituted ammonium salts of ethylenediamine tetraacetic acid, ethylenediamine disuccinic acid, nitrilotriacetic acid, tartrate monosuccinic acid, tartrate disuccinic acid, oxydisuccinic acid, carboxytethyloxysuccinic acid, mellatic acid, sodium benzene polycarboxylate salts, nitrilotris(methylene phosphonic acid), diethylenetrinitrilopentakis(methylenephosphonic acid), 1-hydroxyethane-1,1-diphosphonic acid, ethylene-N,N′-bis(o-hydroxy-phenylgycine), dipliolinic acid, diethylene triamine penta (methylene phosphonate), hexamethylene diamine tetra(methylene phosphonoate), ethylenediaminotetracetic acid, ethylenetriamine pentacetic acid, ethylenediamine-N,N′-disuccinic, iminodiacetic acid derivatives, acid, ethylene diphosphonic acid, organo phosphonic acid, and mixtures thereof, wherein the particles of diacyl peroxide are free from coatings capable of inhibiting dissolution and said composition has a neat pH from about 7 to about 13.
Dependencies are inferred from the claim text.