US4781854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid bleaching compositions
Assignee: Lever Brothers Co
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Filing: 1987-04-02
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Granted: 1988-11-01
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Expires: 2007-04-02
Abstract
Abstract The invention pertains to an aqueous stable thickened low-pH bleaching composition which comprises a thickening synthetic anionic surfactant of the sulphonic acid or salt type, a cold-water-soluble inorganic peroxy compound, in particular peroxymonosulphate, and a mineral acid to yield a pH of below 4.
Inventors
- 👤 Colin Overton
- 👤 Phillip E. Figdore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:55
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/042; C11D3/39; C11D3/3947
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
Aqueous stable thickened low-pH bleacing composition with a viscosity ranging from 10 to 250 mPa.s, consisting essentially of: (a) from 1 to 7.5% by weight of a thickening synthetic anionic surfactant selected from the group consisting of alkyl-, alkenyl- and alkylaryl sulphonic acids, -polyglycolether sulphonic acids, and the salts thereof; (b) from 0.5 to 10% by weight, calculated on the basis of the acid form, of a cold-water-soluble inorganic peroxy compound; (c) from 0.5 to 20% by weight of an acidic compound which is selected from the group of strong mineral acids and the partial salts thereof, capable of providing the composition with a pH value of below 4; and (d) an effective amount of co-surfactant not to exceed 5%.
Claim 2
Dependent Claim
120 words
Aqueous stable thickened low-pH bleacing composition with a viscosity ranging from 10 to 250 mPa.s, consisting essentially of: (a) from 1 to 7.5% by weight of a thickening synthetic anionic surfactant selected from the group consisting of alkyl-, alkenyl- and alkylaryl sulphonic acids, -polyglycolether sulphonic acids, and the salts thereof; (b) from 0.5 to 10% by weight, calculated on the basis of the acid form, of a cold-water-soluble inorganic peroxy compound; (c) from 0.5 to 20% by weight of an acidic compound which is selected from the group of strong mineral acids and the partial salts thereof, capable of providing the composition with a pH value of below 4; and (d) an effective amount of co-surfactant not to exceed 5%.
Claim 3
Dependent Claim
21 words
A composition according to claim 1, wherein the peroxy compound is peroxymonosulphuric acid or an alkali metal or ammonium salt thereof.
Claim 4
Dependent Claim
17 words
A composition according to claim 1, which further comprises 1 to 5% by weight of hydrogen peroxide.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, wherein the thickening surfactant is selected from the group of alkylaryl sulphonates having from 9 to 20 carbon atoms in the alkylaryl radical.
Claim 6
Dependent Claim
49 words
A composition according to claim 1, wherein the thickening surfactant is selected from the group of alkylaryl polyglycolether sulphonates having from 8 to 18 carbon atoms in the alkylaryl radical and from 1 to 4 carbon atoms in the alkyl linkage between the polyglycol portion and the sulphonate group.
Claim 7
Dependent Claim
31 words
A composition according to claim 1, wherein the co-surfactant is an alkoxylated primary or secondary fatty alcohol, the weight ratio between the thickening surfactant and the co-surfactant being at least 1:1.
Claim 8
Dependent Claim
33 words
A composition according to claim 6 wherein the alkoxylated primary or secondary fatty alcohol is a C 11 -C 15 ethoxylated alcohol having from about 3 to about 16 average moles ethylene oxide.
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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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |