Monomeric rich silicate system in automatic dishwashing composition with improved glass etching
AssigneeThe Procter & Gamble Company
InventorsGregory Stephen Caravajal, Janet Layne Marshall
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Abstract
Automatic dishwashing detergent compositions comprising a certain combination of metasilicate with other silicate (polymeric) components are disclosed. Particularly preferred compositions also comprise low foaming surfactant and detergency builders.
Claims14
An automatic dishwashing detergent composition comprising, by weight:
- (a) from about 1% to about 10% of SiO.sub.2 as monomeric silicate;
- (b) from about 1% to about 10% of SiO.sub.2 as a second silicate component having a SiO.sub.2 :M.sub.2 O weight ratio (where M=alkali metal) of from about 2 to about 2.4, wherein said monomeric silicate (a) and silicate component (b) have a SiO.sub.2 weight ratio of from about 10:1 to about 1:10;
- and wherein the automatic dishwashing detergent composition comprises from about 5% to about 12% total SiO.sub.2 ;
- (c) from about 0.01% to about 15% of low foaming surfactant,
- (d) from about 0.1% to about 50% of a detergency builder;
- wherein said detergency builder is a salt or salt/builder of sodium/potassium phosphate;
- and
- (e) from about 0.001% to about 5% of a detersive enzyme;
- wherein said composition has a pH of from about 9.5 to about 10.5.
A method for cleaning soiled tableware comprising contacting said tableware with an aqueous detergent composition comprising (a) from about 1% to about 10% SiO.sub.2 as monomeric silicate, (b) from about 1% to about 10% SiO.sub.2 as a second silicate component having a SiO.sub.2 :M.sub.2 O weight ratio (where M=alkali metal) from about 2 to about 2.4, and wherein said monomeric silicate (a) and second silicate component (b) have a SiO.sub.2 weight ratio of from about 3:1 to about 1:2, and wherein the aqueous wash medium comprises from about 5% to about 12% total SiO.sub.2 ;
- c) nonionic surfactant, d) from about 0.001% to about 5% of a detersive enzyme, and e) detergency builder;
- wherein said detergency builder is sodium/potassium phosphate;
- wherein said composition has a pH of from about 9.5 to about 10.5.
Dependencies are inferred from the claim text.