US5169552A
Expired / Lapsed
US
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Stable thickened liquid cleaning composition containing bleach
Assignee: Procter and Gamble Co
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Filing: 1991-05-29
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Granted: 1992-12-08
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Expires: 2011-05-29
Abstract
Abstract Liquid cleaning compositions displaying enhanced physical stability in the presence of bleach are provided, comprising a chlorine bleach ingredient, cross-linked polycarboxylate polymer, a rheology stabilizing agent, and a buffering agent to maintain the pH of the composition above about 10. Preferred liquid automatic dishwashing detergent compositions containing builder and optional surfactant and metalate, and displaying shear thinning behavior, are disclosed.
Inventors
- 👤 Rodney M. Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3956
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
120 words
A liquid cleaning composition comprising, by weight: (a) a chlorine bleach ingredient providing from about 0.2% to about 2.5% available chlorine; (b) from about 0.1% to about 10% of a cross-linked polycarboxylate polymer thickening agent; (c) from about 0.05% to about 5% of a rheology stabilizing agent having the formula ##STR7## wherein each X, Y and Z is selected from the group consisting of --H, --COO - M + , --Cl, --Br, --SO 3 - M + , --NO 2 , --OCH 3 , or a C 1 to C 4 alkyl and M is H or an alkali metal; or mixtures thereof; and (d) sufficient alkalinity buffering agent to provide said composition with a pH greater than about 10.
Claim 2
Dependent Claim
120 words
A liquid cleaning composition comprising, by weight: (a) a chlorine bleach ingredient providing from about 0.2% to about 2.5% available chlorine; (b) from about 0.1% to about 10% of a cross-linked polycarboxylate polymer thickening agent; (c) from about 0.05% to about 5% of a rheology stabilizing agent having the formula ##STR7## wherein each X, Y and Z is selected from the group consisting of --H, --COO - M + , --Cl, --Br, --SO 3 - M + , --NO 2 , --OCH 3 , or a C 1 to C 4 alkyl and M is H or an alkali metal; or mixtures thereof; and (d) sufficient alkalinity buffering agent to provide said composition with a pH greater than about 10.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein the composition is an automatic dishwashing detergent composition further comprising: (a) from 0% to about 5% of a detergent surfactant; and (b) from about 5% to about 50% of a detergency builder material.
Claim 4
Dependent Claim
39 words
The composition of claim 2 further comprising from 0% to about 1% of an alkali metal salt of an amphoteric metal anion; said composition having an apparent yield value of from about 40 to about 800 dynes/cm 2 .
Claim 5
Dependent Claim
24 words
The composition of claim 2 wherein the chlorine bleach ingredient is selected from the group consisting of sodium hypochlorite, potassium hypochlorite, and mixtures thereof.
Claim 6
Dependent Claim
26 words
The composition of claim 1 comprising the chlorine bleach ingredient providing from about 0.5% to about 1.5% available chlorine based on the weight of the composition.
Claim 7
Dependent Claim
26 words
The composition of claim 4 comprising the chlorine bleach ingredient providing from about 0.5% to about 1.5% available chlorine based on the weight of the composition.
Claim 8
Dependent Claim
21 words
The composition of claim 1 wherein the molecular weight of the polycarboxylate polymer thickening agent is from about 750,000% to 4,000,000.
Claim 9
Dependent Claim
18 words
The composition of claim 1 comprising from about 0.25% to about 5% of the polycarboxylate polymer thickening agent.
Claim 10
Dependent Claim
18 words
The composition of claim 7 comprising from about 0.5% to about 2% of the polycarboxylate polymer thickening agent.
Claim 11
Dependent Claim
18 words
The composition of claim 8 comprising from about 0.5% to about 2% of the polycarboxylate polymer thickening agent.
Claim 12
Dependent Claim
14 words
The composition of claim 1 wherein Z in the rheology stabilizing agent is H.
Claim 13
Dependent Claim
28 words
The composition of claim 11 wherein the rheology stabilizing agent is selected from the group consisting of benzoic acid, phthalic acid, toluic acid and salts and mixtures thereof.
Claim 14
Dependent Claim
17 words
The composition of claim 1 comprising from about 0.1% to about 2% of the rheology stabilizing agent.
Claim 15
Dependent Claim
17 words
The composition of claim 1 comprising from about 0.2% to about 1% of the rheology stabilizing agent.
Claim 16
Dependent Claim
17 words
The composition of claim 13 comprising from about 0.2% to about 1% of the rheology stabilizing agent.
Claim 17
Dependent Claim
29 words
The composition of claim 1 wherein the alkalinity buffering agent is selected from the group consisting of alkali metal silicates, alkali metal carbonates, alkali metal hydroxides, and mixtures thereof.
Claim 18
Dependent Claim
21 words
The composition of claim 1 comprising sufficient alkalinity buffering agent to provide the composition with a pH greater than about 11.5.
Claim 19
Dependent Claim
21 words
The composition of claim 16 comprising sufficient alkalinity buffering agent to provide the composition with a pH greater than about 11.5.
Claim 20
Dependent Claim
67 words
The composition of claim 2 wherein the surfactant is selected from the group consisting of capped propylene oxide, ethylene oxide block copolymers; condensation products of ethylene oxide and propylene oxide with a mono-, di-, or poly-hydroxyl compound with residual hydroxyls capped; alkali metal salts of mono- and/or di-(C 8-14 ) alkyl diphenyl oxide mono- and/or di-sulfonates; C 8-18 alkyl sulfates; C 8-18 alkyl sulfonates; and mixtures thereof.
Claim 21
Dependent Claim
15 words
The composition of claim 2 comprising from about 0.1% to about 2.5% of the surfactant.
Claim 22
Dependent Claim
15 words
The composition of claim 19 comprising from about 0.1% to about 2.5% of the surfactant.
Claim 23
Dependent Claim
31 words
The composition of claim 2 wherein the builder is selected from the group consisting of alkali metal tripolyphosphate, alkali metal pyrophosphate, alkali metal silicates, alkali metal carbonates, polycarboxylates, and mixtures thereof.
Claim 24
Dependent Claim
15 words
The composition of claim 2 comprising from about 15% to about 40% of the builder.
Claim 25
Dependent Claim
15 words
The composition of claim 22 comprising from about 15% to about 40% of the builder.
Claim 26
Dependent Claim
43 words
The composition of claim 3 wherein the alkali metal salt of an amphoteric metal anion is selected from the group consisting of sodium and potassium aluminate, sodium and potassium zincate, sodium and potassium stannate (IV), sodium and potassium titanate (IV), and mixtures thereof.
Claim 27
Dependent Claim
22 words
The composition of claim 3 comprising from about 0.01% to about 0.1% of the alkali metal salt of an amphoteric metal anion.
Claim 28
Dependent Claim
22 words
The composition of claim 25 comprising from about 0.01% to about 0.1% of the alkali metal salt of an amphoteric metal anion.
Claim 29
Dependent Claim
50 words
The composition of claim 19 wherein the builder is selected from the group consisting of alkali metal tripolyphosphate, alkali metal pyrophosphate, alkali metal silicates, alkali metal carbonates, polycarboxylates, and mixtures thereof, and the chlorine bleach ingredient is selected from the group consisting of sodium hypochlorite, potassium hypochlorite, and mixtures thereof.
Claim 30
Dependent Claim
44 words
The composition of claim 28 wherein the molecular weight of the polycarboxylate polymer thickening agent is from about 750,000 to 4,000,000, and the rheology stabilizing agent is selected from the group consisting of benzoic acid, phthalic acid, toluic acid, and salts, and mixtures thereof.
Claim 31
Dependent Claim
39 words
The composition of claim 29 wherein the alkalinity buffering agent is selected from the group consisting of alkali metal silicates, alkali metal carbonates, alkali metal hydroxides, and mixtures thereof, and the composition has a pH greater than about 11.5.
Claim 32
Dependent Claim
68 words
The composition of claim 30 comprising, by weight: the chlorine bleach ingredient providing from about 0.5% to about 1.5% available chlorine; (b) from about 0.5% to about 2% of the cross-linked polycarboxylate polymer thickening agent; (c) from about 0.2% to about 1% of the rheology stabilizing agent; (d) from about 0.1% to about 2.5% of the surfactant; and (e) from about 15% to about 40% of the builder.
Claim 33
Dependent Claim
43 words
The composition of claim 30 further comprising an alkali metal salt of an amphoteric metal anion selected from the group consisting of sodium and potassium aluminate, sodium and potassium zincate, sodium and potassium stannate (IV), sodium and potassium titanate (IV) and mixtures thereof.
Claim 34
Dependent Claim
22 words
The composition of claim 32 comprising from about 0.01% to about 0.1% of the alkali metal salt of an amphoteric metal ion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |