Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1997-05-22
1998-09-29
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8408, 8410, 8412, 8423, A61K 713
Patent
active
058141065
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibres, in particular human keratin fibres such as the hair, this composition comprising, in an acidic medium (pH<7), at least one oxidation base, in combination with 4-hydroxyindoline as coupler, and an oxidizing agent, as well as to the dyeing process using this composition.
It is known to dye keratin fibres, and in particular human hair, with dye compositions containing oxidation dye precursors, in particular ortho- or para-phenylenediamines and ortho- or para-aminophenols, which are generally referred to as oxidation bases. Oxidation dye precursors, or oxidation bases, are colourless or weakly coloured compounds which, when combined with oxidizing products, may give rise to coloured compounds and dyes by a process of oxidative condensation.
It is also known that the shades obtained with these oxidation bases may be varied by combining them with couplers or coloration modifiers, these being chosen in particular from aromatic meta-diamines, meta-aminophenols, meta-diphenols and certain indole or indoline compounds.
The variety of molecules used as oxidation bases and couplers makes it possible to obtain a wide range of colours.
The so-called "permanent" coloration obtained by means of these oxidation dyes must moreover satisfy a certain number of requirements. Thus, it must have no toxicological drawbacks and it must allow shades of the desired intensity to be obtained and have good resistance to external agents (light, inclement weather, washing, permanent waving, perspiration and rubbing).
The dyes must also allow grey hair to be covered and, lastly, they must be as unselective as possible, that is to say that they must allow the smallest possible differences in coloration to be obtained over the entire length of the same keratin fibre, which may indeed be differently sensitized (i.e. damaged) between its tip and its root.
The oxidation dyeing of the keratin fibres is generally carried out in alkaline medium. However, alkaline media have the drawback of causing appreciable degradation of the fibres. By way of example, French patent application FR 2,008,797 has already proposed compositions for the oxidation dyeing of keratin fibres in alkaline medium, comprising at least one oxidation base and at least one indoline derivative as coupler.
The oxidation dyeing of keratin fibres may also be performed in acidic medium, in order to limit the degradation of the keratin fibres. However, the colorations obtained under these conditions are, unfortunately, generally less intense and not as fast as those obtained in alkaline medium.
Now, the Applicant has just discovered that it is possible to obtain novel dyes in acidic medium which are capable of giving rise to intense colorations, which are quite unselective and which suitably withstand the various attacks to which the hair may be subjected, by combining at least one oxidation base, 4-hydroxyindoline and an oxidizing agent such that the resulting ready-to-use mixture has a pH below 7.
This discovery forms the basis of the present invention.
The first subject of the invention is thus a ready-to-use composition for the oxidation dyeing of keratin fibres, and in particular human keratin fibres such as the hair, characterized in that it comprises, in a medium which is suitable for dyeing: acid, as coupler,
The colorations obtained with the ready-to-use dye compositions in accordance with the invention are at least as intense as, if not more intense than, those of the prior art obtained with the same compositions used at basic pH, and they are moreover of low selectivity and have excellent properties of resistance both to atmospheric agents such as light and inclement weather and to perspiration and the various treatments to which the hair may be subjected (washing, permanent waving).
The subject of the invention is also a process for the oxidation dyeing of keratin fibres using this ready-to-use dye composition.
The oxidation bases which may be used in the ready-to-u
REFERENCES:
patent: 4013404 (1977-03-01), Parent et al.
patent: 5391206 (1995-02-01), Cotteret
Derwent Abstract of EP-A-428441, May 1991.
Derwent Abstract of DE-A-3031709, Apr. 1982.
"L'Oreal"
Dusheck Caroline L.
Lieberman Paul
LandOfFree
Composition for the oxidation dyeing of keratin fibres contains does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composition for the oxidation dyeing of keratin fibres contains , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composition for the oxidation dyeing of keratin fibres contains will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-682719