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US 4,933,101 AGranted
Liquid automatic dishwashing compositions compounds providing glassware protection
AssigneeThe Procter & Gamble Company
InventorsWilliam A. Cilley, Rodney M. Wise
Life of this patent
Estimating the term…
Abstract
Disclosed are liquid automatic dishwashing detergent compositions containing an insoluble inorganic zinc salt useful for inhibition of glassware corrosion in the dishwasher. These compositions are particularly desirable because use of them in the dishwasher does not result in precipitation of insolubles on the dishware or dishwasher parts.
Claims29
A liquid automatic dishwashing detergent composition comprising:
- (a) from 0% to about 5% of detergent surfactant;
- (b) from about 5% to about 40% of detergency builder;
- (c) hypochlorite bleach to yield available chlorine in an amount of from 0% to about 2.5%;
- (d) from about 0.25% to 10% of a thickening agent;
- and
- (e) an amount of an insoluble inorganic zinc compound, having an average particle size less than about 250 microns, that will provide the composition with from about 0 01% to about 1.0% zinc;
- said composition having an apparent yield value of from about 40 to about 800 dynes/cm.sup.2.
4 more elements
A liquid automatic dishwashing detergent composition comprising:
- (a) from about 12% to about 25% of alkali metal tripolyphosphate;
- (b) from about 2% to about 15% of alkali metal silicate;
- (c) from about 3% to about 10% of alkali metal carbonate;
- (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine;
- (e) from about 0.1% to about 1.5% of ##STR10## having a molecular weight of about 1900, wherein PO is propylene oxide, EO is ethylene oxide and the ratio of PO to EO is from about 4:1 to about 5:1;
- (f) from about 0.5% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dis persible polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof;
- (g) from 0% to about 1% of an ethoxylated alkyl ester of phosphoric acid having an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4;
- (h) an amount of an insoluble inorganic zinc compound, having an average particle size of less than about 250 microns, that will provide the composition with from about 0.02% to about 0.2% zinc;
- said liquid detergent composition containing no clay suspension agents and having an apparent yield value of from about 100 to about 600 dynes/cm.sup.2.
6 more elements
A liquid automatic dishwashing detergent composition comprising:
- (a) from about 12% to about 25% of alkali metal tripolyphosphate;
- (b) from about 2% to about 15% of alkali metal silicate;
- (c) from about 3% to about 10% of alkali metal carbonate;
- (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine;
- (e) from 0% to about 1.5% of sodium n-decyl diphenyloxide disulfonate;
- (f) from about 0.5% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible polyacrylic acid cross-linked with a polyalkenyl polyether and having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof;
- (g) from 0% to about 1% of an ethoxylated alkyl ester of phosphoric acid having an average alkyl chain length of from about 12 to about 18 carbon atoms and an average number of ethoxylate units of from about 2 to about 4;
- (h) an amount of an insoluble inorganic zinc compound, having an average particle size of less than about 250 microns, that will provide the composition with from about 0.02% to about 0.2% zinc;
- said liquid detergent composition containing no clay suspension agents and having an apparent yield value of from about 100 to about 600 dynes/cm.sup.2.
6 more elements
A liquid automatic dishwashing detergent composition comprising:
- (a) from about 4% to about 8% of sodium tripolyphosphate;
- (b) from about 8% to about 15% of tetrapotassium pyrophosphate;
- (c) from 0 to about 8% of potassium carbonate;
- (d) from 0 to about 6% of sodium carbonate;
- (e) hypochlorite bleach in an amount to provide the composition with from about 0.5% to about 1.5% of available chlorine;
- (f) from about 0.1% to about 2.5% of a bleach stable surfactant;
- (g) from 0 to about 3.5% of alkali metal hydroxide;
- (h) from about 0.1% to about 1% of an alkyl ester of phosphoric acid;
- (i) from about 0.5% to about 1.5% of a polyacrylic polymer having a molecular weight greater than about 750,000;
- (j) from about 3% to about 12%, on a solids basis, of an alkali metal silico-zincate colloidal dispersion wherein the molar ratio of zinc metal to SiO.sub.2 is from about 0.01:1 to about 0.1:1;
- said liquid detergent containing no clay suspension agents and having an apparent yield value of from about 100 to about 600 dynes/cm.sup.2.
8 more elements
Dependencies are inferred from the claim text.