US4370142A
Expired / Lapsed
US
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Hair-dyeing compositions based on para-phenylenediamine and ortho-aminophenol
Assignee: L'Oréal SA
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Filing: 1980-07-08
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Granted: 1983-01-25
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Expires: 2000-07-08
Abstract
Abstract The invention relates to compositions for hair dyeing which contain, as the oxidative dye-stuff, in a cosmetically acceptable medium, para-phenylenediamine and ortho-aminophenol, or their cosmetically acceptable salts, in a ratio para-phenylenediamine/ortho-aminophenol which is such that, after the addition of an equal volume of hydrogen peroxide of 20 volumes strength and application to the hair for 30 minutes, no Bandrowsky's base can be detected in the oxidizing dyeing composition. The compositions according to the invention make it possible to impart background colorations to the hair without the formation of Bandrowsky's base.
Inventors
- 👤 Andree Bugaut
- 👤 Philippe Thouvenin
- 👤 Jean Cotteret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:20
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/10; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/411; A61K8/413; A61K8/415
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A composition suitable for dyeing human hair which contains, in a cosmetically acceptable medium, paraphenylenediamine, or a cosmetically acceptable salt thereof, and ortho-aminophenol, or a cosmetically acceptable salt thereof, in a molar ratio para-phenylenediamine/orthoaminophenol which is less than or equal to 2:1 in the case para-phenylenediamine is present in an amount of 1 to 2.5% by weight and which is greater than or equal to 1:1 and less than or equal to 3:1 in the case para-phenylenediamine is present in an amount of 0.2 to 1% by weight.
Claim 2
Dependent Claim
88 words
A composition suitable for dyeing human hair which contains, in a cosmetically acceptable medium, paraphenylenediamine, or a cosmetically acceptable salt thereof, and ortho-aminophenol, or a cosmetically acceptable salt thereof, in a molar ratio para-phenylenediamine/orthoaminophenol which is less than or equal to 2:1 in the case para-phenylenediamine is present in an amount of 1 to 2.5% by weight and which is greater than or equal to 1:1 and less than or equal to 3:1 in the case para-phenylenediamine is present in an amount of 0.2 to 1% by weight.
Claim 3
Dependent Claim
20 words
A composition according to claim 1 in which ortho-aminophenol is present in an amount of 0.07 to 2.5% by weight.
Claim 4
Dependent Claim
26 words
A composition according to claim 2 in which the molar ratio para-phenylenediamine/ortho-aminophenol is greater than or equal to 1:1 and less than or equal to 2:1.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 which additionally contains at least one direct dyestuff.
Claim 6
Dependent Claim
15 words
A composition according to claim 4 in which the direct dyestuff is a nitrobenzene derivative.
Claim 7
Dependent Claim
14 words
A composition according to claim 1 which has a pH of 8 to 11.5.
Claim 8
Dependent Claim
50 words
A composition according to claim 1 in which the cosmetically acceptable medium is aqueous and contains one or more of the following adjuvants: an anionic, cationic, non-ionic or amphoteric water-soluble surface-active agent or a mixture thereof, an organic solvent, thickener, antioxidant, penetrating agent, sequestering agent, film-forming polymer, buffer or perfume.
Claim 9
Dependent Claim
39 words
Process for dyeing the hair which comprises mixing a composition as defined in claim 1 with an oxidising agent which is hydrogen peroxide or urea peroxide, and applying the resulting mixture to the hair for 10 to 30 minutes.
Claim 10
Dependent Claim
77 words
Process for dyeing the hair, which comprises applying thereto a dyeing composition containing ortho-aminophenol, allowing the composition to impregnate the hair, optionally rinsing the hair and applying a dyeing composition containing paraphenylenediamine with an oxidising agent which is hydrogen peroxide or urea peroxide, the optional rinsing of the hair being carried out so as to leave, on the latter, a sufficient amount of ortho-aminophenol to prevent the formation of Bandrowsky's base during the coloration on the hair.
Claim 11
Dependent Claim
77 words
Process for dyeing the hair, which comprises applying thereto a dyeing composition containing ortho-aminophenol, allowing the composition to impregnate the hair, optionally rinsing the hair and applying a dyeing composition containing paraphenylenediamine with an oxidising agent which is hydrogen peroxide or urea peroxide, the optional rinsing of the hair being carried out so as to leave, on the latter, a sufficient amount of ortho-aminophenol to prevent the formation of Bandrowsky's base during the coloration on the hair.
Claim 12
Dependent Claim
41 words
Process according to claim 9, which comprises applying a pre-lotion containing about 2% by weight of ortho-aminophenol and, after towel-drying, applying a composition containing 1 to 2% by weight of para-phenylenediamine in the presence of an equal volume of hydrogen peroxide.
Claim 13
Dependent Claim
42 words
Process according to claim 9, which comprises applying a pre-lotion containing about 2% by weight of ortho-aminophenol and, after rinsing with water in an amount not exceeding 50 ml/g of hair, applying a composition containing 0.5 to 1% by weight of para-phenylenediamine.
Claim 14
Dependent Claim
40 words
Process according to claim 9, which comprises applying a pre-lotion containing about 2% of ortho-aminophenol, and after rinsing with water in an amount up to 75 ml/g of hair, applying a composition containing 0.2 to 0.5% by weight of paraphenylenediamine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |