Aqueous liquid automatic dishwashing detergent composition comprising hypochlorite bleach and an iodate or iodide hypochlorite bleach stabilizer

Claim 2

An alkaline aqueous liquid bleach composition having improved bleach stability for use in the cleaning of glassware and dishware which consists of: (a) chlorine bleach compound capable of forming hypochlorite on addition to water in an amount sufficient to provide 0.5 to 8.0 weight % of available chlorine; (b) a water soluble iodate bleach stabilizer compound in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.08 to 1.67, said water soluble iodate being selected from the group consisting of water soluble alkali metal iodates and alkaline earth metal iodides; (c) 0 to 12.0 weight percent of sodium hydroxide; and (d) balance being water.

Claim 5

An aqueous liquid dishwasher composition having improved bleach stability comprising approximately by weight: (a) 0 to 40% inorganic or organic alkali metal detergent builder salt; (b) 0 to 5% nonionic or anionic organic detergent active material; (c) 0 to 5% chlorine bleach stable foam depressant; (d) chlorine bleach compound capable of forming hypochlorite in addition to water in an amount to provide about 0.5 to 5% of available chlorine; (e) a water soluble iodate bleach compound selected from the group consisting of water soluble alkali and alkaline earth metal iodates in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.36 to 0.92; (f) 0 to 12% sodium hydroxide; (g) at least one thickener selected from the group consisting of clay, silica, fatty acid, fatty acid salts and a crosslinked polycarboxylate polymer said thickener being present in a sufficient amount to provide said composition with a thixotropic index of 1 to 15; and (h) balance being water, said composition having a pH of at least 10.5.

Claim 6

An aqueous liquid dishwasher composition having improved bleach stability comprising approximately by weight: (a) 0 to 40% inorganic or organic alkali metal detergent builder salt; (b) 0 to 5% nonionic or anionic organic detergent active material; (c) 0 to 5% chlorine bleach stable foam depressant; (d) chlorine bleach compound capable of forming hypochlorite in addition to water in an amount to provide about 0.5 to 5% of available chlorine; (e) a water soluble iodate bleach compound selected from the group consisting of water soluble alkali and alkaline earth metal iodates in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.36 to 0.92; (f) 0 to 12% sodium hydroxide; (g) at least one thickener selected from the group consisting of clay, silica, fatty acid, fatty acid salts and a crosslinked polycarboxylate polymer said thickener being present in a sufficient amount to provide said composition with a thixotropic index of 1 to 15; and (h) balance being water, said composition having a pH of at least 10.5.

Claim 7

The composition of claim 3 wherein the chlorine bleach compound is a member selected from the group of chlorocyanurates, chlorisocyanurates, alkali and alkaline earth hypochlorites.

Claim 8

The composition of claim 3 wherein the iodate bleach stabilizer compound is a member selected from the group consisting of water soluble alkali and alkaline earth metal iodates.

Claim 9

The composition of claim 3 further including at least one thickener selected from the group consisting of clay, silica, fatty acids fatty acid salts and a crosslinked polycarboxylate polymer said thickener been present in a sufficient amount to provide said composition with a thixotropic index of about 1 to about 15.

Claim 10

The composition of claim 3 wherein said composition has 0.1 to 5% organic detergent active material.

Claim 11

The composition of claim 3 wherein said composition has 0.5 to 3% organic detergent active material.

Claim 12

A method for cleaning soiled dishware which comprises contacting the soiled dishware which comprises contacting the soiled dishware in an automatic dishwashing machine in an aqueous washbath having dispersed therein an effective amount of the composition of claim 68 to obtain clean dishware of reduced soils.

Claim 13

An alkaline aqueous liquid bleach composition having improved bleach stability comprising approximately by weight: (a) 0 to 30% alkali metal carbonate; (b) chlorine bleach compound capable of forming hypochlorite on addition to water in an amount to provide about 0.5 to 8% of available chlorine; (c) a water soluble iodate bleach stabilizer compound in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.36 to 0.92, such iodate bleach stabilizer compound being selected from the group consisting of water soluble alkali and alkaline metal iodates; (d) 1 to 12% sodium hydroxide; (e) 0.2 to 5.0% of a nonionic or anionic detergent active material; and (f) balance being water.

Claim 14

An alkaline aqueous liquid bleach composition having improved bleach stability comprising approximately by weight: (a) 0 to 30% alkali metal carbonate; (b) chlorine bleach compound capable of forming hypochlorite on addition to water in an amount to provide about 0.5 to 8% of available chlorine; (c) a water soluble iodate bleach stabilizer compound in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.36 to 0.92, such iodate bleach stabilizer compound being selected from the group consisting of water soluble alkali and alkaline metal iodates; (d) 1 to 12% sodium hydroxide; (e) 0.2 to 5.0% of a nonionic or anionic detergent active material; and (f) balance being water.

Claim 15

The composition of claim 10 wherein the iodate bleach stabilizer compound is a member selected from the group consisting of water soluble alkali and alkaline earth metal iodates.

Claim 16

The composition of claim 10 wherein the chlorine bleach compound is a member selected from the group of chlorocyanurates, chloroisocyanurates, alkali and alkaline earth hypochlorites.

Claim 17

The composition of claim 12 further including about to 10 to about 40.0 wt. % of at least one detergent builder salt wherein said detergent builder salt is selected from the group consisting of alkali metal polyphosphates.

Claim 18

The composition of claim 12 further including at least one thickener selected from the group consisting of fatty acids, fatty acid salts, clay, silica and a crosslinked polycarboxylate polymer, said thickener being present in a sufficient amount to provide said composition with a thixotropic index of about 1 to 15.

Claim 19

The composition of claim 14 further including 20 to 30 wt. % of alkali metal polyphosphates:

Claim 20

An aqueous liquid automatic dishwasher detergent composition having improved bleach stability comprising approximately by weight: (a) 8 to 40% alkali metal polyphosphate; (b) 8 to 35% sodium silicate; (c) 5 to 25% alkali metal carbonate; (d) less than 5% chlorine bleach stable, water dispersible organic nonionic detergent active material; (e) less than 5% chlorine bleach stable foam depressant; (f) chlorine bleach compound selected from the group of alkali metal hypochlorites in an amount sufficient to provide about 1 to 4% of available chlorine; (g) a water soluble alkali metal iodate bleach stabilizer compound in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.2 to 1.0; (h) 0 to 10% of sodium hydroxide; and (i) balance being water.

Claim 21

An aqueous liquid automatic dishwasher detergent composition having improved bleach stability comprising approximately by weight: (a) 8 to 40% alkali metal polyphosphate; (b) 8 to 35% sodium silicate; (c) 5 to 25% alkali metal carbonate; (d) less than 5% chlorine bleach stable, water dispersible organic nonionic detergent active material; (e) less than 5% chlorine bleach stable foam depressant; (f) chlorine bleach compound selected from the group of alkali metal hypochlorites in an amount sufficient to provide about 1 to 4% of available chlorine; (g) a water soluble alkali metal iodate bleach stabilizer compound in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.2 to 1.0; (h) 0 to 10% of sodium hydroxide; and (i) balance being water.

Claim 22

The composition of claim 16 further including at least one thickener selected from the group consisting of clay, silica, fatty acids, fatty acid salts, and a crosslinked polycarboxylate polymer, said thickener being present in a sufficient amount to provide said composition with a thixotropic index of about 1 to about 15.

Claim 23

The composition of claim 16 wherein said composition has 8 to 40% sodium polyphosphate.

Claim 24

The composition of claim 16 wherein said composition has 20 to 30% alkali metal polyphosphate and 0.1 to 5% organic detergent active material.

Claim 25

The composition of claim 16, wherein the chlorine bleach compound is sodium hypochlorite.

Claim 26

The composition of claim 20 wherein the alkali metal iodate bleach stabilizer compound is potassium iodate.

Claim 27

The composition of claim 20 wherein the alkali metal iodate bleach stabilizer compound is in an amount sufficient to provide a mole ratio of iodate to available chlorine of 0.25 to 0.80.

Claim 28

An aqueous liquid bleach containing composition having improved bleach stability comprising approximately by weight at least one ingredient selected from the group consisting of 0.1 to 5.0% nonionic or anionic organic detergent, 8 to 40% of an alkali metal detergent builder salt, 0.01 to 5% of a chlorine bleach stable foam inhibitor and mixtures thereof, and a hypochlorite bleach source sufficient to provide 0.5 to 8 wt. % available chlorine and a water soluble iodate bleach stabilizer compound selected from the group consisting of water soluble alkali and alkaline earth metal iodates in an amount sufficient to provide a mole ratio of iodate to available chlorine of 0.08 to 1.67.

Claim 29

An aqueous liquid bleach containing composition having improved bleach stability comprising approximately by weight at least one ingredient selected from the group consisting of 0.1 to 5.0% nonionic or anionic organic detergent, 8 to 40% of an alkali metal detergent builder salt, 0.01 to 5% of a chlorine bleach stable foam inhibitor and mixtures thereof, and a hypochlorite bleach source sufficient to provide 0.5 to 8 wt. % available chlorine and a water soluble iodate bleach stabilizer compound selected from the group consisting of water soluble alkali and alkaline earth metal iodates in an amount sufficient to provide a mole ratio of iodate to available chlorine of 0.08 to 1.67.

Claim 30

The composition of claim 23 wherein the hypochlorite source contains 1.0 to 5 wt. % available chlorine and the water soluble iodate compound bleach stabilizer is in a sufficient amount to provide a mole ratio of iodate to available chlorine of 0.25 to 1.25.

Claim 33

An aqueous liquid dishwasher composition having improved bleach stability comprising approximately by weight: (a) 0 to 40% inorganic or organic alkali metal detergent builder; (b) 2.4 to 40% sodium silicate; (c) 0 to 5% nonionic or anionic organic detergent active material; (d) 0 to 5% chlorine bleach stable foam depressant; (e) chlorine bleach compound capable of forming hypochlorite in addition to water in an amount to provide about 0.5 to 5% of available chlorine; (f) a water soluble iodide/iodine bleach stabilizer, wherein the mole ratio of iodide to iodine is 2:1 to 1:2, and a sufficient amount of iodide to provide a mole ratio of iodide to available chlorine of 0.036 to 0.092 wherein the iodide bleach stabilizer is a member selected from the group consisting of water soluble alkali and alkaline earth metal iodides; (g) 0 to 12% sodium hydroxide; and (h) balance being water.

Claim 34

An aqueous liquid dishwasher composition having improved bleach stability comprising approximately by weight: (a) 0 to 40% inorganic or organic alkali metal detergent builder; (b) 2.4 to 40% sodium silicate; (c) 0 to 5% nonionic or anionic organic detergent active material; (d) 0 to 5% chlorine bleach stable foam depressant; (e) chlorine bleach compound capable of forming hypochlorite in addition to water in an amount to provide about 0.5 to 5% of available chlorine; (f) a water soluble iodide/iodine bleach stabilizer, wherein the mole ratio of iodide to iodine is 2:1 to 1:2, and a sufficient amount of iodide to provide a mole ratio of iodide to available chlorine of 0.036 to 0.092 wherein the iodide bleach stabilizer is a member selected from the group consisting of water soluble alkali and alkaline earth metal iodides; (g) 0 to 12% sodium hydroxide; and (h) balance being water.

Claim 35

The composition of claim 26 wherein the chlorine bleach compound is a member selected from the group of chlorocyanurates, chloroisocyanurates, alkali and alkaline earth hypochlorites.

Claim 36

The composition of claim 26 wherein the iodide bleach stabilizer is a member selected from the group consisting of water soluble alkali and alkaline earth metal iodides.

Claim 37

The composition of claim 26 further including a thickener selected from the group consisting of clay, silica, fatty acids, fatty acid salts, polyacrylate polymer and polycarboxylate said thickener being present in a sufficient amount to provide said composition with a thixotropic index of about 1 to about 15.

Claim 38

The composition of claim 26 wherein said composition has 8 to 40% inorganic or organic alkali metal detergent builder.

Claim 39

The composition of claim 26 wherein said composition has 8 to 40% inorganic or organic detergent builder salt and 0.1 to 5% organic detergent active material.

Claim 40

An aqueous liquid dishwashing detergent composition having improved bleach stability comprising approximately by weight at least one ingredient selected from the group consisting of 0.1 to 5.0% of a nonionic or anionic organic detergent, 8 to 40% of at least one alkali metal detergent builder salt, 0.01 to 5% of a chlorine bleach stable foam inhibitor and mixtures thereof, and a hypochlorite bleach source sufficient to provide 0.5 to 5 wt.% available chlorine and water soluble iodide/iodine bleach stabilizer wherein the mole ratio of iodide to iodine is 2:1 to 1:2 and a sufficient amount of iodide to provide a mole ratio of iodide to available chlorine is 0.008 to 0.167 , said water soluble iodide being selected from the group consisting of water soluble alkali and alkaline earth metal iodides.

Claim 41

An aqueous liquid dishwashing detergent composition having improved bleach stability comprising approximately by weight at least one ingredient selected from the group consisting of 0.1 to 5.0% of a nonionic or anionic organic detergent, 8 to 40% of at least one alkali metal detergent builder salt, 0.01 to 5% of a chlorine bleach stable foam inhibitor and mixtures thereof, and a hypochlorite bleach source sufficient to provide 0.5 to 5 wt.% available chlorine and water soluble iodide/iodine bleach stabilizer wherein the mole ratio of iodide to iodine is 2:1 to 1:2 and a sufficient amount of iodide to provide a mole ratio of iodide to available chlorine is 0.008 to 0.167 , said water soluble iodide being selected from the group consisting of water soluble alkali and alkaline earth metal iodides.

Claim 42

The composition of claim 32 wherein the hypochlorite source contains 1.0 to 4 wt.% available chlorine and the iodide/iodine bleach stabilizer is in a sufficient amount to provide a mole ratio of iodide to available chlorine of 0.025 to 0.125.

Claim 43

An aqueous liquid automatic dishwasher detergent composition having improved bleach stability comprising approximately by weight: (a) 8 to 40% alkali metal polyphosphate; (b) 8 to 35% sodium silicate; (c) 5 to 25% alkali metal carbonate; (d) 0 to 5% chlorine bleach stable, water dispersible organic nonionic or anionic detergent active material; (e) 0 to 5% chlorine bleach stable foam depressant; (f) chlorine bleach compound selected from the group of alkali metal hypochlorites in an amount sufficient to provide about 1 to 4% of available chlorine; (g) a water soluble iodide/iodine bleach stabilizer, wherein the mole ratio of iodide to iodine is 2:1 to 1:2, and a sufficient amount of iodide to provide a mole ratio of iodide to available chlorine of 0.18 to 0.080 such water soluble iodide being selected from the group consisting of water soluble alkali and alkaline with metal iodides provide a mole ratio of iodide to available chlorine of 0.025 to 0.060; (h) 1 to 10% of sodium hydroxide; and (i) balance being water.

Claim 44

An aqueous liquid automatic dishwasher detergent composition having improved bleach stability comprising approximately by weight: (a) 8 to 40% alkali metal polyphosphate; (b) 8 to 35% sodium silicate; (c) 5 to 25% alkali metal carbonate; (d) 0 to 5% chlorine bleach stable, water dispersible organic nonionic or anionic detergent active material; (e) 0 to 5% chlorine bleach stable foam depressant; (f) chlorine bleach compound selected from the group of alkali metal hypochlorites in an amount sufficient to provide about 1 to 4% of available chlorine; (g) a water soluble iodide/iodine bleach stabilizer, wherein the mole ratio of iodide to iodine is 2:1 to 1:2, and a sufficient amount of iodide to provide a mole ratio of iodide to available chlorine of 0.18 to 0.080 such water soluble iodide being selected from the group consisting of water soluble alkali and alkaline with metal iodides provide a mole ratio of iodide to available chlorine of 0.025 to 0.060; (h) 1 to 10% of sodium hydroxide; and (i) balance being water.

Claim 45

The composition of claim 34 wherein the alkali metal iodide is potassium iodide.

Claim 46

The composition of claim 34 wherein the alkali metal iodide is in an amount sufficient to provide a mole ratio of alkali metal iodide to available chlorine of 0.020 to 0.070.

Claim 47

The composition of claim 34 further including a thickener selected from the group consisting of clay, silica, fatty acids, fatty acid salts, and crosslinked polycarboxylate polymer, said thickener being present in a sufficient amount to provide said composition with a thixotropic index of about 1 to about 15.

Claim 48

The composition of claim 34 wherein said composition has 10 to 40% alkali metal polyphosphate and 0.2 to 5% organic detergent active material.

Claim 49

The composition of claim 34 wherein the chlorine compound is sodium hypochlorite.

Claim 50

The composition of claim 39 wherein said composition has 20 to 30% alkali metal polyphosphate and 0.5 to 3% organic detergent active material.

Claim 51

A method for cleaning soiled dishware which comprises contnacting the soiled dishware in an automatic dishwashing machine in an aqueous washbath having dispersed therein an effective amount of the composition of claim 34 to obtain clean dishware of reduced soils.

Claim 52

An aqueous liquid automatic dishwasher detergent composition having improved bleach stability comprising approximately by weight: (a) 8 to 40% alkali metal polyphosphate; (b) 8 to 35% sodium silicate; (c) 5 to 25% alkali metal carbonate; (d) 0.1 to 5% chlorine bleach stable, water dispersible organic nonionic or anionic detergent active material; (e) 0.1 to 5% chlorine bleach stable foam depressant; (f) 7.7 to 30.8 sodium hypochlorite in an amount sufficient to provide about 1 to 4% of available chlorine; (g) a water soluble potassium iodide/iodine bleach stabilizer, wherein the mole ratio of iodide to iodine is about 1:1, wherein the potassium iodide is present in a sufficient amount to provide a mole ratio of iodide to available chlorine of 0.025 to 0.060; (h) 1 to 10% of sodium hydroxide; and (i) balance being water.

Claim 53

An aqueous liquid automatic dishwasher detergent composition having improved bleach stability comprising approximately by weight: (a) 8 to 40% alkali metal polyphosphate; (b) 8 to 35% sodium silicate; (c) 5 to 25% alkali metal carbonate; (d) 0.1 to 5% chlorine bleach stable, water dispersible organic nonionic or anionic detergent active material; (e) 0.1 to 5% chlorine bleach stable foam depressant; (f) 7.7 to 30.8 sodium hypochlorite in an amount sufficient to provide about 1 to 4% of available chlorine; (g) a water soluble potassium iodide/iodine bleach stabilizer, wherein the mole ratio of iodide to iodine is about 1:1, wherein the potassium iodide is present in a sufficient amount to provide a mole ratio of iodide to available chlorine of 0.025 to 0.060; (h) 1 to 10% of sodium hydroxide; and (i) balance being water.

Claim 54

The composition of claim 42 further including at least one thickener selected from the group consisting of clay, silica, fatty acids, fatty acid salts, and a crosslinked polycarboxylate polymer, said thickener being present in a sufficient amount to provide said composition with a thixotropic index of about 1 to about 15.

Claim 55

The composition of claim 42 wherein said composition has 20 to 30% sodium polyphosphate.

Claim 56

The composition of claim 42 wherein said composition has 20 to 30% alkali metal polyphosphate and 0.2 to 5% organic detergent active material.