Solid cast warewashing composition

Claim 1

A solid cast warewashing composition which comprises: (a) about 20 to 55 wt-%, based upon the solid cast warewashing composition and calculated on an anhydrous basis, of a hydratable, crystalline alkali metal silicate composition; (b) about 1 to 70 wt-%, based upon the solid cast warewashing composition, of an alkali metal condensed phosphate composition, having sufficient water of hydration to allow the cast warewashing composition to solidify; (c) about 0.1 to 20 wt-%, based upon the solid cast warewashing composition, of an encapsulated bleaching source which comprises: (i) a bleaching agent core; (ii) an inner coating of a separating compound in an amount sufficient to retard any chemical interaction between the bleaching agent core and an outer coating compound; and (iii) an outer coating of an encapsulating amount of a water soluble cellulose ether compound selected from the group consisting of (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl cellulose, hydroxy (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, and mixtures thereof. (d) about 8 to 60 wt-%, based upon the solid cast warewashing composition, water; (e) about 0 to 10 wt-%, based upon the solid cast warewashing composition, dye; (f) about 0 to 10 wt-%, based upon the solid cast warewashing composition, perfume; (g) about 0 to 15 wt-%, based upon the solid cast warewashing composition, surfactant; (h) about 0 to 15 wt-%, based upon the solid cast warewashing composition, defoamer; (i) about 0 to 20 wt-%, based upon the solid cast warewashing composition, alkali metal salt of a polyacrylic acid compound; (j) about 0 to 20 wt-%, based upon the solid cast warewashing composition of a neutral soluble salt selected from the group consisting of an alkali metal sulphate compound and an alkali metal chloride compound; and (k) about 0 to 30 wt-%, based upon the solid cast warewashing composition, of an alkali compound selected from the group consisting of alkali metal hydroxides, soluble alkali metal silicates with the formula (M₂O) x :(SiO₂) y wherein M is an alkali metal and the ratio of x:y is about 1.0:1.6 to 1.0:3.75, alkali metal carbonates, alkali metal bicarbonates, alkali metal sesquicarbonates, alkali metal borates and mixtures thereof.

Claim 10

A method of cleaning ware which comprises the steps of: (a) contacting a solid cast warewashing composition and water to form an aqueous cleaning solution; and (b) contacting soiled ware with the cleaning solution so as to remove soil from the soiled ware; wherein the solid cast warewashing composition comprises: (i) about 20 to 55 wt-%, based upon the solid cast warewashing composition and calculated on an anhydrous basis, of a hydratable crystalline alkali metal silicate; (ii) about 1 to 70 wt-%, based upon the solid cast warewashing composition, of an alkali metal condensed phosphate composition having sufficient water of hydration to allow the cast warewashing composition to solidify; and (iii) about 0.1 to 20 wt-%, based upon the solid cast warewashing composition, of an encapsulated bleaching source which comprises: (1) a bleaching agent core; (2) an inner coating of a separating compound in an amount sufficient to retard any chemical interaction between the bleaching agent core and an outer coating compound; and (3) an outer coating of an encapsulating amount of a water soluble cellulose ether compound selected from the group consisting of (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl cellulose, hydroxy (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, and mixtures thereof; (iv) about 8 to 60 wt-% water, based upon the solid cast warewashing composition; (v) about 0 to 10 wt-%, based upon the solid cast warewashing composition, of a dye; (vi) about 0 to 10 wt-%, based upon the solid cast warewashing composition of a perfume; (vii) about 0 to 15 wt-%, based upon the solid cast composition, of a surfactant; (viii) about 0 to 15 wt-%, based upon the solid cast composition, of a defoamer; (ix) about 0 to 20 wt-%, based upon the solid cast composition, of an alkali metal salt of a polyacrylic acid compound; (x) about 0 to 20 wt-%, based upon the solid cast composition, a neutral soluble salt selected from the group consisting of an alkali metal sulphate compound an alkali metal chloride compound; and (xi) about 0 to 30 wt-%, based upon the solid cast warewashing composition, of an alkali compound selected from the group consisting of alkali metal hydroxides, soluble alkali metal silicates with the formula (M₂O) x :(SiO₂)y wherein M is an alkali metal and the ratio of x:y is about 1.0:1.6 to 1.0:3.75, alkali metal carbonates, alkali metal bicarbonates, alkali metal sesquicarbonates, alkali metal borates and mixtures thereof.

Claim 11

A method of cleaning ware which comprises the steps of: (a) contacting a solid cast warewashing composition and water to form an aqueous cleaning solution; and (b) contacting soiled ware with the cleaning solution so as to remove soil from the soiled ware; wherein the solid cast warewashing composition comprises: (i) about 20 to 55 wt-%, based upon the solid cast warewashing composition and calculated on an anhydrous basis, of a hydratable crystalline alkali metal silicate; (ii) about 1 to 70 wt-%, based upon the solid cast warewashing composition, of an alkali metal condensed phosphate composition having sufficient water of hydration to allow the cast warewashing composition to solidify; and (iii) about 0.1 to 20 wt-%, based upon the solid cast warewashing composition, of an encapsulated bleaching source which comprises: (1) a bleaching agent core; (2) an inner coating of a separating compound in an amount sufficient to retard any chemical interaction between the bleaching agent core and an outer coating compound; and (3) an outer coating of an encapsulating amount of a water soluble cellulose ether compound selected from the group consisting of (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl cellulose, hydroxy (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, and mixtures thereof; (iv) about 8 to 60 wt-% water, based upon the solid cast warewashing composition; (v) about 0 to 10 wt-%, based upon the solid cast warewashing composition, of a dye; (vi) about 0 to 10 wt-%, based upon the solid cast warewashing composition of a perfume; (vii) about 0 to 15 wt-%, based upon the solid cast composition, of a surfactant; (viii) about 0 to 15 wt-%, based upon the solid cast composition, of a defoamer; (ix) about 0 to 20 wt-%, based upon the solid cast composition, of an alkali metal salt of a polyacrylic acid compound; (x) about 0 to 20 wt-%, based upon the solid cast composition, a neutral soluble salt selected from the group consisting of an alkali metal sulphate compound an alkali metal chloride compound; and (xi) about 0 to 30 wt-%, based upon the solid cast warewashing composition, of an alkali compound selected from the group consisting of alkali metal hydroxides, soluble alkali metal silicates with the formula (M₂O) x :(SiO₂)y wherein M is an alkali metal and the ratio of x:y is about 1.0:1.6 to 1.0:3.75, alkali metal carbonates, alkali metal bicarbonates, alkali metal sesquicarbonates, alkali metal borates and mixtures thereof.

Claim 12

A method of making a solid cast warewashing composition which comprises the steps of: (a) combining about 8 to 60 wt-%, based upon the solid cast warewashing composition, water and about 20 to 55 wt-%, based upon the solid cast warewashing composition, of a hydratable, crystalline alkali metal silicate composition to form an aqueous composition; (b) heating the aqueous composition to a temperature sufficient to hydrate the alkali metal silicate; (c) cooling the hydrated alkali metal silicate; (d) combining about 1 to 70 wt-%, based upon the solid cast warewashing composition, alkali metal condensed phosphate composition having sufficient water of hydration to allow the cast warewashing composition to solidify, and the cooled hydrated alkali metal silicate composition to form a mixture; (e) cooling the mixture to about 110 to 140 °F.; (f) combining the cooled mixture and about 0.1 to 20 wt-%, based upon the solid cast warewashing composition, of an encapsulated bleaching source to form a liquid detergent composition; the encapsulated bleaching source comprising: (i) a bleaching agent core; (ii) an inner coating of a separating compound in an amount sufficient to retard any chemical interaction between the bleaching agent core and an outer coating compound; and (iii) an outer coating of an encapsulating amount of a water soluble cellulose ether compound selected from the group consisting of (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl cellulose, hydroxy (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, and mixtures thereof; and (g) casting the liquid detergent composition into a container to form the solid cast warewashing composition.

Claim 13

A method of making a solid cast warewashing composition which comprises the steps of: (a) combining about 8 to 60 wt-%, based upon the solid cast warewashing composition, water and about 20 to 55 wt-%, based upon the solid cast warewashing composition, of a hydratable, crystalline alkali metal silicate composition to form an aqueous composition; (b) heating the aqueous composition to a temperature sufficient to hydrate the alkali metal silicate; (c) cooling the hydrated alkali metal silicate; (d) combining about 1 to 70 wt-%, based upon the solid cast warewashing composition, alkali metal condensed phosphate composition having sufficient water of hydration to allow the cast warewashing composition to solidify, and the cooled hydrated alkali metal silicate composition to form a mixture; (e) cooling the mixture to about 110 to 140 °F.; (f) combining the cooled mixture and about 0.1 to 20 wt-%, based upon the solid cast warewashing composition, of an encapsulated bleaching source to form a liquid detergent composition; the encapsulated bleaching source comprising: (i) a bleaching agent core; (ii) an inner coating of a separating compound in an amount sufficient to retard any chemical interaction between the bleaching agent core and an outer coating compound; and (iii) an outer coating of an encapsulating amount of a water soluble cellulose ether compound selected from the group consisting of (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl cellulose, hydroxy (C₁₋₄) alkyl cellulose, carboxy (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, (C₁₋₄) alkyl hydroxy (C₁₋₄) alkyl cellulose, and mixtures thereof; and (g) casting the liquid detergent composition into a container to form the solid cast warewashing composition.