Automatic dishwashing tablets
AssigneeColgate-Palmolive Company
InventorsPhilip Gorlin, Divaker Kenkare
Life of this patent
Estimating the term…
Abstract
An automatic dishwashing composition which is in the form of a multilayer table comprises an alkali metal phosphate detergent builder salt, an alkali metal carbonate, a dialkali metal disilicate, a nonionic surfactant, an alkali metal metasilicate, optionally a polymer containing sulfonic acid groups, a wax coated chlorine bleach compound, and a hydrotrope.
Claims9
An automatic dishwashing tablet which comprising three layers, wherein the tablet comprises a bottom layer, a middle layer and a top layer, wherein the bottom layer is 35 wt. % to 45 wt. % of the total weight of the tablet, the middle layer is 10 wt. % to 30 wt. % of the total weight of the tablet and the top layer is 35 wt. % to 45 wt. % of the total weight % of the tablet, wherein the bottom layer comprises approximately by weight of the total weight of the bottom layer:
- (a) 20% to 40% of a hydrated alkali metal phosphate detergent builder salt;
- (b) 10% to 25% of a hydrated dialkali metal disilicate and/or alkali metal meta silicate;
- (c) 0 to 40% of a hydrated alkali metal carbonate and/or alkali metal citrate;
- (d) 0.1% to 5% of a low foaming nonionic surfactant;
- (e) 0 to 5% of a polymer containing sulfonic acid groups;
- (f) 0.1% to 1% of a hydrotrope;
- and
- (g) 0 to 1.0% of a pigment or dye;
- the middle layer comprises approximately by weight of the total weight of the middle layer:
- (a) 30% to 45% of an anhydrous alkali metal phosphate detergent builder salt;
- (b) 30% to 45% of an anhydrous alkali metal carbonate and/or alkali metal citrate;
- (c) 1% to 30% of a wax coated or fatty acid coated chlorine bleach compound;
- and
- (d) 0.1% to 1% of a hydrotrope;
- and the top layer comprises approximately by weight of the total weight of the top layer:
- (a) 20% to 40% of a hydrated alkali metal phosphate detergent builder salt;
- (b) 10% to 25% of a hydrated dialkali metal disilicate and/or alkali metal metasilicate;
- (c) 0 to 40% of a hydrated alkali metal carbonate and/or alkali metal citrate;
- (d) 0.1% to 5% of a low foaming nonionic surfactant;
- (e) 0 to 5% of a polymer containing sulfonic acid groups;
- (f) 0.1% to 1% of a hydrotrope;
- and
- (g) 0 to 1% of a pigment or dye.
Dependencies are inferred from the claim text.