US4929377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable, aqueous bleach compositions containing solid organic peroxy acid
Assignee: Lever Brothers Co
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Filing: 1989-02-21
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Granted: 1990-05-29
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Expires: 2009-02-21
Abstract
Abstract An aqueous, liquid bleaching composition is described having a pH of from 2 to 6 and comprising a solid, particulate, substantially water-insoluble, organic peroxy acid such as diperoxy dodecane dioic acid. This peroxy acid is stably suspended in an aqueous liquid by a structuring combination of a secondary C 10 -C 20 alkane sulphonate, an ethoxylated fatty alcohol and sodium sulphate.
Inventors
- 👤 Stuart A. Emmons
- 👤 Perry Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:25
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947; C11D1/00; C11D1/66; C11D1/83; C11D1/02; C11D1/12; C11D1/14; C11D1/143; C11D1/72
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
An aqueous, liquid, bleach composition having a pH of from about 2 to about 6 and a viscosity of from about 0.05 to about 1.0 PaS, measured at a shear rate of 21 second -1 at 20° C., comprising: (a) from 1.5 to 20% by weight of a solid, particulate, substantially water-insoluble, organic peroxy acid; (b) from 2.0 to 20% by weight of a surfactant mixture consisting of a secondary C 10 -C 20 alkane sulphonate (SAS) and an ethoxylated fatty alcohol (NI) having a Hydrophilic-Lipophilic Balance (HLB) of not more than 10.5 in a weight ratio of from 5:5 to 9:1; and (c) from 7 to 16% by weight of sodium sulphate.
Claim 2
Dependent Claim
113 words
An aqueous, liquid, bleach composition having a pH of from about 2 to about 6 and a viscosity of from about 0.05 to about 1.0 PaS, measured at a shear rate of 21 second -1 at 20° C., comprising: (a) from 1.5 to 20% by weight of a solid, particulate, substantially water-insoluble, organic peroxy acid; (b) from 2.0 to 20% by weight of a surfactant mixture consisting of a secondary C 10 -C 20 alkane sulphonate (SAS) and an ethoxylated fatty alcohol (NI) having a Hydrophilic-Lipophilic Balance (HLB) of not more than 10.5 in a weight ratio of from 5:5 to 9:1; and (c) from 7 to 16% by weight of sodium sulphate.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, wherein said peroxy acid is 1,12-diperoxy dodecane dioic acid.
Claim 4
Dependent Claim
20 words
A composition according to claim 1, wherein said secondary alkane sulphonate is sodium secondary C 12 -C 18 alkane sulfonate.
Claim 5
Dependent Claim
20 words
A composition according to claim 1, wherein said secondary alkane sulphonate is sodium secondary C 13 -C 17 alkane sulphonate.
Claim 6
Dependent Claim
14 words
A composition according to claim 1, wherein said HLB is between 6 and 10.
Claim 7
Dependent Claim
11 words
A composition according claim 1, wherein said HLB is from 8-8.5.
Claim 8
Dependent Claim
59 words
A composition according to claim 1, comprising: (a) from 4 to 15% by weight of said peroxy acid; (b) from 5 to 15% by weight of said surfactant mixture in a weight ratio of from 6:4 to 8:2; and (c) from 10 to 15% by weight of sodium sulphate, and having a pH of from about 3.0 to 5.0.
Claim 9
Dependent Claim
14 words
A composition according to claim 7, wherein said pH is from 3.5 to 4.5.
Claim 10
Dependent Claim
19 words
A composition according to claim 1, which further comprises from about 1 to 10% by weight of hydrogen peroxide.
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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) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |