US4337163A
Expired / Lapsed
US
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Liquid, thickened chlorine bleaching composition
Assignee: Lever Brothers Co
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Filing: 1980-11-21
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Granted: 1982-06-29
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Expires: 2000-11-21
Abstract
Abstract In liquid, pourable, thickened chlorine bleaching compositions, in which the thickening is produced by at least two different detergent active compounds, a buffer salt is included to improve their stability at lower chlorine levels and at reduced pH values. Typically, a composition comprises an aqueous solution of alkali-metal hypochlorite, thickened by means of a tertiary amine oxide and a saturated fatty acid soap, and contains an alkali-metal orthophosphate buffer system, at a chlorine content of 1-10% and a pH of 10-12.5. The compositions are useful in bleaching operations, especially in bleaching hard surfaces such as toilets, tiles, kitchen sinks, etc.
Inventors
- 👤 Ulrich Schilp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/395; C11D3/3958; C11D3/3953; C11D3/3956; C11D1/00; C11D1/66; C11D1/75
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
217 words
Liquid, thickened chlorine bleaching composition having a pH of 10-12.5 and a viscosity of about 10 to 150 cS at a temperature of 25° C., comprising an aqueous, hypochlorite-ion yielding solution in an amount such that the composition has an active chlorine content of 1-10% by weight, said composition containing as thickening agent 0.5-5% by weight of a mixture of (1) a hypochlorite-soluble first detergent active compound selected from the group consisting of a tertiary amine oxide having one branched or straight C 8-18 alkyl chain and two short chain alkyl groups, C 8-18 alkyl-substituted betaines, quaternary ammonium compounds and mixtures thereof, and (2) a second detergent active compound selected from the group consisting of an alkali metal salt of a fully saturated C 8-18 fatty acid, an alkali metal acylsarcosinate, an alkali metal alkyltauride, a sugar ester, an alkali metal C 10-18 alkylether sulphate containing 1-10 moles of ethylene oxide and/or propylene oxide and mixtures thereof, the weight ratio of the hypochlorite-soluble first detergent active compound to the second detergent active compound being from 75:25 to 40:60, the composition further comprising from 50-350 m mol/kg of a buffer salt selected from the group consisting of alkali metal salts of orthophosphoric acids, alkali metal salts of silicic acids, alkali metal salts of carbonic acids and mixtures thereof.
Claim 2
Dependent Claim
217 words
Liquid, thickened chlorine bleaching composition having a pH of 10-12.5 and a viscosity of about 10 to 150 cS at a temperature of 25° C., comprising an aqueous, hypochlorite-ion yielding solution in an amount such that the composition has an active chlorine content of 1-10% by weight, said composition containing as thickening agent 0.5-5% by weight of a mixture of (1) a hypochlorite-soluble first detergent active compound selected from the group consisting of a tertiary amine oxide having one branched or straight C 8-18 alkyl chain and two short chain alkyl groups, C 8-18 alkyl-substituted betaines, quaternary ammonium compounds and mixtures thereof, and (2) a second detergent active compound selected from the group consisting of an alkali metal salt of a fully saturated C 8-18 fatty acid, an alkali metal acylsarcosinate, an alkali metal alkyltauride, a sugar ester, an alkali metal C 10-18 alkylether sulphate containing 1-10 moles of ethylene oxide and/or propylene oxide and mixtures thereof, the weight ratio of the hypochlorite-soluble first detergent active compound to the second detergent active compound being from 75:25 to 40:60, the composition further comprising from 50-350 m mol/kg of a buffer salt selected from the group consisting of alkali metal salts of orthophosphoric acids, alkali metal salts of silicic acids, alkali metal salts of carbonic acids and mixtures thereof.
Claim 3
Dependent Claim
17 words
Composition according to claim 1, said composition having a content of active chlorine of 1-2.5% by weight.
Claim 4
Dependent Claim
18 words
Composition according to claims 1, in which the salt is a mixture of trialkalimetal orthophosphate and dialkalimetal orthophosphate.
Claim 5
Dependent Claim
15 words
Composition according to claims 2, 3 or 1, said composition having a pH of 10-12.5.
Claim 6
Dependent Claim
41 words
A composition according to claims 2, 3, 4 or 1, said composition containing an additional amount of 0.1-15% by weight of a strong electrolyte selected from the group consisting of sodium chloride, sodium carbonate, trisodium orthophosphate, sodium hydroxide and potassium chloride.
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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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |