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Patent US5783175A successfully refreshed from Google Patents.
US5783175A
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US
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Dust-free hair bleach powders
Assignee: L'Oréal SA
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Filing: 1996-08-27
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Granted: 1998-07-21
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Expires: 2016-08-27
Abstract
Abstract PCT No. PCT/US96/13764 Sec. 371 Date Apr. 29, 1997 Sec. 102(e) Date Apr. 29, 1997 PCT Filed Aug. 27, 1996 PCT Pub. No. WO97/07776 PCT Pub. Date Mar. 6, 1997The invention relates to substantially dust-free bleach powders that, when mixed with aqueous hydrogen peroxide, yield activated bleach compositions that exhibit improved thixotropy. The bleach powders comprise at least one de-dusting agent and at least one peroxygenated salt. The de-dusting agents, which are preferably present in an amount less than about 10% by weight of the bleach powder are inert, substantially hydrophilic compounds selected from alkylated esters, cyclic ethers and cyclic esters. The bleach powders also comprise powdered polytetrafluoroethylene (PTFE) in an amount of about 1-5% by weight of the bleach powder. The bleach powders also comprise an ammonia source, e.g., an ammonium halide, diammonium phosphate, ammonium sulfate and mixtures thereof. Optionally, one or more hair conditioning agents, thickeners and desiccants may be added to the dust-free bleach powder.
Inventors
- 👤 Thomas M. Schultz
- 👤 Michael DeGeorge
- 👤 David Cannell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:41
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/22; A61K8/02; A61K8/0216; A61K8/022; A61K8/30; A61K8/33; A61K8/37; A61K8/49; A61K8/4973; A61K8/72; A61K8/81; A61K8/8123; A61K8/817; A61Q; A61Q5/00; A61Q5/08; A61Q5/12; Y; Y10; Y10S; Y10S424/00; Y10S424/03
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
83 words
A substantially dust-free bleach powder, which comprises: (a) a plurality of particles which comprise a peroxygenated salt, (b) a substantially hydrophilic de-dusting agent selected from the group consisting of diisopropyl adipate, diisopropyl sebacate, diisopropyl oxalate dimethyl isosorbide, diisopropyl isosorbide, and γ-butyrolactone in an amount that is less than about 10% by weight of the bleach powder, wherein the de-dusting agent coats the particles to prevent dust formation, and (c) powdered polytetrafluoroethylene in an amount of about 1-5% by weight of the bleach powder.
Claim 2
Dependent Claim
83 words
A substantially dust-free bleach powder, which comprises: (a) a plurality of particles which comprise a peroxygenated salt, (b) a substantially hydrophilic de-dusting agent selected from the group consisting of diisopropyl adipate, diisopropyl sebacate, diisopropyl oxalate dimethyl isosorbide, diisopropyl isosorbide, and γ-butyrolactone in an amount that is less than about 10% by weight of the bleach powder, wherein the de-dusting agent coats the particles to prevent dust formation, and (c) powdered polytetrafluoroethylene in an amount of about 1-5% by weight of the bleach powder.
Claim 3
Dependent Claim
15 words
The bleach powder according to claim 1 wherein the bleach powder further comprises a base.
Claim 4
Dependent Claim
27 words
The bleach powder according to claim 1, wherein the de-dusting agent is present in an amount of about 2 to 5% by weight of the bleach powder.
Claim 5
Dependent Claim
25 words
The bleach powder according to claim 1, wherein the de-dusting agent is present in an amount of about 2-3% by weight of the bleach powder.
Claim 6
Dependent Claim
24 words
The bleach powder according to claim 1, wherein the polytetrafluoroethylene is present in an amount of about 2-4% by weight of the bleach powder.
Claim 7
Dependent Claim
25 words
The bleach powder according to claim 1, wherein the powdered polytetrafluoroethylene is present in an amount of about 3% by weight of the bleach powder.
Claim 8
Dependent Claim
27 words
The bleach powder according to claim 1, wherein the peroxygenated salt is selected from the group consisting of water soluble salts of persulfates, percarbonates, perborates, and metasilicates.
Claim 9
Dependent Claim
23 words
The bleach powder according to claim 7 wherein the peroxygenated salt is selected from the group consisting of sodium persulfate and potassium persulfate.
Claim 10
Dependent Claim
25 words
The bleach powder according to claim 2, wherein the base is selected from the group consisting of amine alkali compounds, alkaline silicates and alkaline metasilicates.
Claim 11
Dependent Claim
24 words
The bleach powder according to claim 9, wherein the amine alkali is selected from the group consisting of trishydroxyalkylamines, guanidinium carbonate and guanidinium borate.
Claim 12
Dependent Claim
14 words
The bleach powder according to claim 9, wherein the alkaline silicate is sodium silicate.
Claim 13
Dependent Claim
14 words
The bleach powder according to claim 9, wherein the alkaline metasilicate is sodium metasilicate.
Claim 14
Dependent Claim
11 words
The bleach according to claim 9, wherein the trishydroxyalkylamine is trishydroxyethylamine.
Claim 15
Dependent Claim
32 words
The bleach powder according to claim 1, wherein the bleach powder further comprises a source of ammonia selected from the group consisting of ammonium halides, diammonium phosphate, ammonium sulfate and mixtures thereof.
Claim 16
Dependent Claim
14 words
The bleach powder according to claim 14, wherein the ammonium halide is ammonium chloride.
Claim 17
Dependent Claim
20 words
The bleach powder according to claim 14, wherein the ammonia source is a mixture of ammonium chloride and ammonium sulfate.
Claim 18
Dependent Claim
15 words
The bleach powder according to claim 1, further comprising at least one hair conditioning agent.
Claim 19
Dependent Claim
30 words
The bleach powder according to claim 17, wherein the hair conditioning agent is a monomeric or polymeric compound selected from the group consisting of cationic, anionic, amphoteric and non-ionic compounds.
Claim 20
Dependent Claim
14 words
The bleach powder according to claim 18, wherein the hair conditioning agent is polyquaternium-22.
Claim 21
Dependent Claim
13 words
The bleach powder according to claim 1, further comprising at least one thickener.
Claim 22
Dependent Claim
12 words
The bleach powder according to claim 20, wherein the thickener is hydroxyethylcellulose.
Claim 23
Dependent Claim
13 words
The bleach powder according to claim 1, further comprising at least one desiccant.
Claim 24
Dependent Claim
12 words
The bleach powder according to claim 22, wherein the desiccant is silica.
Claim 25
Dependent Claim
76 words
A substantially dust-free bleach powder, which consists essentially of: (a) a plurality of particles which comprise a peroxygenated salt; (b) a substantially hydrophilic de-dusting agent selected from the group consisting of diisopropyl adipate, diisopropyl sebacate, diisopropyl oxalate dimethyl isosorbide, diisopropyl isosorbide, and γ-butyrolactone, wherein the de-dusting agent coats the particles to prevent dust formation; (c) powdered polytetrafluoroethylene; (d) a base; (e) an ammonia source; (f) a hair conditioning agent; (g) a thickener; and (h) a desiccant.
Claim 26
Dependent Claim
76 words
A substantially dust-free bleach powder, which consists essentially of: (a) a plurality of particles which comprise a peroxygenated salt; (b) a substantially hydrophilic de-dusting agent selected from the group consisting of diisopropyl adipate, diisopropyl sebacate, diisopropyl oxalate dimethyl isosorbide, diisopropyl isosorbide, and γ-butyrolactone, wherein the de-dusting agent coats the particles to prevent dust formation; (c) powdered polytetrafluoroethylene; (d) a base; (e) an ammonia source; (f) a hair conditioning agent; (g) a thickener; and (h) a desiccant.
Claim 27
Dependent Claim
26 words
The bleach powder according to claim 24, wherein the de-dusting agent is present in an amount less than about 10% by weight of the bleach powder.
Claim 28
Dependent Claim
28 words
The bleach powder according to claim 24, wherein the de-dusting agent is present in an amount of from about 2 to 50% by weight of the bleach powder.
Claim 29
Dependent Claim
28 words
The bleach powder according to claim 24, wherein the de-dusting agent is present in an amount of from about 2 to 3% by weight of the bleach powder.
Claim 30
Dependent Claim
25 words
The bleach powder according to claim 24, wherein the powdered polytetrafluoroethylene is present in an amount of about 1-5% by weight of the bleach powder.
Claim 31
Dependent Claim
25 words
The bleach powder according to claim 24, wherein the powdered polytetrafluoroethylene is present in an amount of about 2-4% by weight of the bleach powder.
Claim 32
Dependent Claim
25 words
The bleach powder according to claim 24, wherein the powdered polytetrafluoroethylene is present in an amount of about 3% by weight of the bleach powder.
Claim 33
Dependent Claim
20 words
The bleach powder according to claim 24, wherein the ammonia source is a mixture of ammonium chloride and ammonium sulfate.
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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) | 2001-07-20 | 2002-01-19 | 2002-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-20 | 2006-01-19 | 2006-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-20 | 2010-01-19 | 2010-07-21 | $7700.00 | Window Closed / Lapsed |