Patent US4828747A successfully refreshed from Google Patents.
US4828747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspending system for insoluble peroxy acid bleach
Assignee: Lever Brothers Co
•
Filing: 1988-03-25
•
Granted: 1989-05-09
•
Expires: 2008-03-25
Abstract
Abstract An aqueous liquid bleaching composition is described having a pH from 1 to 6.5 and comprising a solid, particulate, substantially water-insoluble organic peroxy acid such as diperoxydodecanedioic acid. This peroxy acid is stably suspended in an aqueous liquid by a structuring combination of anionic surfactant, ethoxylated nonionic surfactant, and fatty acid.
Inventors
- 👤 Mark E. Rerek
- 👤 Michael P. Aronson
- 👤 Ralph R. Sepulveda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:31
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
An aqueous liquid bleaching composition having a pH of from 1 to 6.5 comprising: (i) from 1 to 40% by weight of a solid, particulate, substantially water-insoluble organic peroxy acid; (ii) from 1 to 30% by weight of an anionic surfactant; (iii) from 0.5 to 20% by weight of an ethoxylated nonionic surfactant; and (iv) a fatty acid present in an amount sufficient to stabilize said peroxy acid against phase separation from the aqueous liquid.
Claim 2
Dependent Claim
75 words
An aqueous liquid bleaching composition having a pH of from 1 to 6.5 comprising: (i) from 1 to 40% by weight of a solid, particulate, substantially water-insoluble organic peroxy acid; (ii) from 1 to 30% by weight of an anionic surfactant; (iii) from 0.5 to 20% by weight of an ethoxylated nonionic surfactant; and (iv) a fatty acid present in an amount sufficient to stabilize said peroxy acid against phase separation from the aqueous liquid.
Claim 3
Dependent Claim
13 words
A composition according to claim 1 wherein said peroxy acid is 1,12-diperoxydodecanedioic acid.
Claim 4
Dependent Claim
22 words
A composition according to claim 1 wherein said peroxy acid is selected from the group consisting of 1,9-diperoxyazelaic acid and 4,4'-sulfonylbisperoxybenzoic acid.
Claim 5
Dependent Claim
15 words
A composition according to claim 1 wherein said anionic surfactant is a secondary alkane sulfonate.
Claim 6
Dependent Claim
14 words
A composition according to claim 1 wherein said anionic surfactant is an alkylbenzene sulfonate.
Claim 7
Dependent Claim
34 words
A composition according to claim 1 wherein said ethoxylated nonionic surfactant is a C 12 -C 18 fatty alcohol condensed with from about 3 to about 9 moles ethylene oxide per fatty alcohol molecule.
Claim 8
Dependent Claim
22 words
A composition according to claim 1 wherein said peroxy acid is present in an amount between about 2 and 10% by weight.
Claim 9
Dependent Claim
22 words
A composition according to claim 1 wherein said anionic surfactant is present in an amount between about 5 and 10% by weight.
Claim 10
Dependent Claim
23 words
A composition according to claim 1 wherein the alkoxylated nonionic surfactant is present in an amount between about 1 and 2% by weight.
Claim 11
Dependent Claim
20 words
A composition according to claim 1 wherein the fatty acid is a C 12 -C 18 fatty alkyl monocarboxylic acid.
Claim 12
Dependent Claim
23 words
A composition according to claim 1 wherein the fatty acid is present in an amount from about 1 to about 5% by weight.
Claim 13
Dependent Claim
22 words
A composition according to claim 1 wherein the fatty acid is present in an amount from about 2 to 3% by weight.
Claim 14
Dependent Claim
26 words
A composition according to claim 1 having a viscosity from 0.05 to 20 PaS measured at a shear rate of 21 sec -1 at 25° C.
Claim 15
Dependent Claim
17 words
A composition according to claim 1 further comprising from about 1 to about 10% additional hydrogen peroxide.
References Cited (Backward Citations)
US2996350A
Cited
US3996152A
Cited
US4017412A
Cited
US4126573A
Cited
US4443352A
Cited
US4450089A
Cited
US4455249A
Cited
US4642198A
Cited
US4655781A
Cited
EP0176124A2
Cited
EP0240481A1
Cited
EP0254331A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |