US4668236A
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Dyeing composition for keratinous fibres containing at least one co-solubilized N-substituted 2-nitro-para-phenylenediamine and corresponding processes for dyeing keratinous fibres
Assignee: L'Oréal SA
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Filing: 1985-06-14
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Granted: 1987-05-26
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Expires: 2005-06-14
Abstract
Abstract The invention relates to a dyeing composition for keratinous fibres containing, in a suitable vehicle, at least one nitrated direct dye of the 2-nitro-paraphenylenediamine series, in which the amino group in position 4 is mono- or disubstituted with lower alkyl or hydroxyalkyl radicals and in which the amino group in position 1 is optionally monosubstituted with a lower alkyl or hydroxyalkyl radial, and the aromatic ring can be substituted or unsubstituted on the remaining positions; the invention consists in introducing into such a composition an imidazolidinedione or one of its substitution derivatives, to improve the solubility of the abovementioned nitrated direct dye by a co-solubilization phenomenon. The invention also relates to a process for dyeing keratinous fibres using such compositions.
Inventors
- 👤 Jean-Francois Grollier
- 👤 Jean Cotteret
- 👤 Georges Rosenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:39
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/4946; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61Q5/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
236 words
A hair dye composition comprising a solution of, in a cosmetically acceptable solvent, (a) a direct dye of the formula ##STR7## wherein R 1 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms and hydroxyethyl, R 2 is hydroxyethyl, R 3 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms and hydroxyethyl, R 4 is selected from the group consisting of hydrogen, alkyl containing 1-4 carbon atoms and halogen, with the proviso that when R 4 is not hydrogen, R 3 is hydrogen, said direct dye being present in an amount ranging from 0.05 to 5 percent by weight based on the total weight of said composition, and (b) as a co-solubilization agent for the said direct dye defined in (a) above so as to reduce the risks of recrystallization of said direct dye in said cosmetically acceptable solvent, an imidazolidinedione of the formula ##STR8## wherein R' 1 and R' 4 each independently are selected from the group consisting of hydrogen and alkyl containing 1-2 carbon atoms, R' 2 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms, phenyl and phenanthryl, R' 3 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms, phenyl, ureido and carboxy methyl, said imidazolidinedione being present in an amount ranging from 0.1 to 5 percent by weight based on the total weight of said composition.
Claim 2
Dependent Claim
236 words
A hair dye composition comprising a solution of, in a cosmetically acceptable solvent, (a) a direct dye of the formula ##STR7## wherein R 1 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms and hydroxyethyl, R 2 is hydroxyethyl, R 3 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms and hydroxyethyl, R 4 is selected from the group consisting of hydrogen, alkyl containing 1-4 carbon atoms and halogen, with the proviso that when R 4 is not hydrogen, R 3 is hydrogen, said direct dye being present in an amount ranging from 0.05 to 5 percent by weight based on the total weight of said composition, and (b) as a co-solubilization agent for the said direct dye defined in (a) above so as to reduce the risks of recrystallization of said direct dye in said cosmetically acceptable solvent, an imidazolidinedione of the formula ##STR8## wherein R' 1 and R' 4 each independently are selected from the group consisting of hydrogen and alkyl containing 1-2 carbon atoms, R' 2 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms, phenyl and phenanthryl, R' 3 is selected from the group consisting of hydrogen, alkyl containing 1-2 carbon atoms, phenyl, ureido and carboxy methyl, said imidazolidinedione being present in an amount ranging from 0.1 to 5 percent by weight based on the total weight of said composition.
Claim 3
Dependent Claim
14 words
The hair dye composition of claim 1 wherein said imidazolidinedione is allantoin or 5-methyl-5-phenylhydantoin.
Claim 4
Dependent Claim
86 words
The hair dye composition of claim 1 wherein said direct dye is selected from the group consisting of (a) a direct dye wherein R 1 =methyl, R 2 =R 3 =β--hydroxyethyl and R 4 ═H, (b) a direct dye wherein R 1 =R 3 =methyl, R 2 =β--hydroxyethyl and R 4 =H, (c) a direct dye wherein R 1 =R 2 =R 3 =β--hydroxyethyl and R 4 =H, and (d) a direct dye wherein R 1 =R 3 =H, R 2 =β--hydroxyethyl and R 4 =methyl.
Claim 5
Dependent Claim
32 words
The hair dye composition of claim 1 wherein said direct dye is present in an amount ranging from 0.1 to 3 percent by weight based on the total weight of said composition.
Claim 6
Dependent Claim
31 words
The hair dye composition of claim 1 wherein said imidazolidinedione is present in an amount ranging from 0.3 to 3 percent by weight based on the total weight of said composition.
Claim 7
Dependent Claim
38 words
The hair dye composition of claim 1 wherein said solvent is water or an alcohol, said solvent being present in an amount ranging from 0.5 to 20 percent by weight based on the total weight of said composition.
Claim 8
Dependent Claim
31 words
The hair dye composition of claim 6 wherein said solvent is present in an amount ranging from 2 to 10 percent by weight based on the total weight of said composition.
Claim 9
Dependent Claim
15 words
The hair dye composition of claim 1 having a pH ranging from 4 to 10.5.
Claim 10
Dependent Claim
46 words
A process for dyeing hair comprising applying to said hair a hair-dyeing amount of the composition of claim 1, permitting said hair dye composition to remain in contact with the hair for a period of time ranging from 3 to 60 minutes and rinsing said hair.
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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |