Bleaching and dyeing; fluid treatment and chemical modification – Color protecting process for dyed product
Patent
1993-12-21
1995-08-22
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Color protecting process for dyed product
8406, 8408, 8409, 8410, 8411, 8421, A61K 713
Patent
active
054435960
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to new meta-aminophenols, to dyeing compositions for keratinous fibers, and especially for human hair, containing at least one meta-aminophenol as coupler, combined with at least one oxidation dye precursor, as well as to a dyeing process employing said compositions.
It is customary, for the dyeing of keratinous fibers such as human hair or furs, to employ dyeing compositions containing oxidation dye precursors, and especially para-phenylenediamines, ortho-aminophenols or para-aminophenols, which are designated generally by the term oxidation bases.
It is also known that, in order to vary the hues obtained with these oxidation bases, color modifiers or couplers are used, and especially meta-phenylenediamines, meta-aminophenols and meta-diphenols.
In the alkaline oxidizing media normally used in oxidation dyeing, para-phenylenediamines and para-aminophenols give rise, in the presence of couplers such as meta-aminophenols, to colored indophenols or indoanilines.
It is important, moreover, that the oxidation bases and the couplers which are used in oxidation dyeing compositions should impart to the hair colorations which are stable to light, to washing and to inclement weather.
It is also necessary for the compounds used to display a good level of safety.
Many couplers of the type of meta-aminophenols substituted on the aromatic ring are already known. However, a large number of them do not meet the desired requirements.
The Applicants has just discovered new meta-aminophenols which combine a very good level of safety with the dyeing qualities of a good coupler, and which may hence be advantageously used as couplers in combination with oxidation dye precursors, in particular of the para type, in oxidation dyeing compositions for keratinous fibers, in an alkaline or acid medium.
The present invention relates to an oxidation dyeing composition, intended for use for the dyeing of keratinous fibers, and especially human hair, containing, on the one hand at least one para and/or ortho oxidation dye precursor, and on the other hand at least one meta-aminophenol of the formula (I) defined below, as coupler.
Thus, the present invention relates to compositions for the dyeing of keratinous fibers, characterized in that it contains, in a medium suitable for dyeing: ##STR2## in which R represents hydrogen, C.sub.1 -C.sub.4 lower alkyl, C.sub.1 -C.sub.6 monohydroxyalkyl; C.sub.2 -C.sub.6 polyhydroxyalkyl; or alkylcarbonyl in which the alkyl groups contain from 1 to 4 carbon atoms;
Among meta-aminophenols of formula (I), the compounds of formula (II): ##STR3## in which R' represents a C.sub.1 -C.sub.4 alkyl radical or a C.sub.2 or C.sub.3 mono- or polyhydroxyalkyl radical, as well as their addition salts with an acid, are new and constitute another subject of the invention.
The subject of the invention is also a process dyeing keratinous fibers, employing the compositions according to the invention as well as multi-component dyeing agents which can be in the form of multi-compartment devices or "kits" comprising the different compositions suitable for carrying out the process.
Other subjects of the invention will become apparent on reading the description and the examples which follow.
In the definitions above, among alkyl radicals, methyl, ethyl, propyl, butyl, isopropyl, isobutyl and tert-butyl radicals may be mentioned.
Among monohydroxyalkyl radicals, .beta.-hydroxyethyl, .beta.-hydroxypropyl and .gamma.-hydroxypropyl may be mentioned.
As a polyhydroxyalkyl radical, .beta., .gamma.-dihydroxypropyl may be mentioned.
The addition salts of the meta-aminophenols with an acid can be, in particular, the addition salts with an inorganic acid such as hydrochloric, hydrobromic or sulfuric acid.
Some compounds of formula (I) are known. The compounds of formula (I) may be prepared from 3-nitro2,6-dimethoxyphenol.
The synthesis of the compound of formula (I) for which R is H may be carried out according to the process described in J.A.C.S., Vol. 51, 1929, page 569.
The synthesis of the compounds of fo
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Bonaventure Nicole
Junino Alex
Lagrange Alain
"L'Oreal"
Dusheck Caroline L.
Lieberman Paul
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