Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1998-05-20
2000-10-24
Liott, Caroline D.
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8414, 8415, 8428, 8557, 8558, 8662, 8675, A61K 713
Patent
active
061360422
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a composition for dyeing the hair, comprising at least one direct dye and at least one crosslinked polymer containing acrylic units and C.sub.10 -C.sub.30 alkyl acrylate units.
It is known to dye hair fibres with direct dye compositions according to a so-called "direct dyeing" process which consists in applying to the fibres dye molecules which have an affinity for the said fibres, in leaving them to stand on the fibres and then in rinsing the fibres. The resulting colorations are temporary or semi-permanent colorations depending on the nature of the interactions between the direct dyes and the hair fibre, and their desorption from the surface and/or from the core of the fibre.
In order to facilitate the application of such dye compositions to the hair, in particular to prevent them from running down the forehead and the face or beyond the point of application initially chosen, when they are applied or during the exposure time required for dyeing, the viscosity of the compositions is conventionally increased using crosslinked polyacrylic acid (thickener). However, dye compositions based on direct dyes and on crosslinked polyacrylic acid no longer prove to be sufficiently satisfactory as regards their dyeing properties after they have been stored for a certain period at a temperature below room temperature, for example below 10.degree. C., and in particular at about 4.degree. C. Thus, it is observed that compositions stored under such conditions give rise to a weaker rise of the direct dye on the hair and thus have an insufficient dyeing power.
The present invention aims to solve the above problem, i.e. to propose a means which makes it possible to preserve the dyeing power of dye compositions containing a direct dye, for compositions liable to be stored at low temperatures, in particular at temperatures below 10.degree. C.
After considerable research conducted in this matter, the Applicant has now discovered that it is possible to preserve the dyeing power of direct dye compositions if an effective amount of a crosslinked polymer containing acrylic units and C.sub.10 -C.sub.30 alkyl acrylate units is added to these compositions.
Even after relatively prolonged storage at temperatures below 10.degree. C., and in particular close to 4.degree. C., compositions with good dyeing power and whose rise on the hair is very satisfactory are obtained.
This discovery forms the basis of the present invention.
The subject of the present invention is thus a cosmetic composition for dyeing the hair, of the type comprising, in a cosmetically acceptable support which is suitable for dyeing, at least one direct dye, characterized in that it also comprises at least one crosslinked polymer containing acrylic units and C.sub.10 -C.sub.30 alkyl acrylate units.
The subject of the present invention is also the use of a crosslinked polymer containing acrylic units and C.sub.10 -C.sub.30 alkyl acrylate units in, or for the manufacture of, a direct dye composition for the hair comprising at least one direct dye, in order to improve the conservation of the dyeing power of the said composition, in particular after storage below about 10.degree. C., and especially at about 4.degree. C.
The invention also relates to a process for improving the conservation of the dyeing power, in particular after storage below about 10.degree. C., and especially at about 4.degree. C., of a dye composition for the hair comprising at least one direct dye, this process consisting in introducing an effective amount of at least one crosslinked polymer containing acrylic units and C.sub.10 -C.sub.30 alkyl acrylate units into the said composition.
Lastly, the invention relates to a process for dyeing hair using the compositions with improved properties in accordance with the invention.
However, other characteristics, aspects, objects and advantages of the invention will become even more apparent on reading the description and the examples which follow.
According to the invention, the term acrylic units is understood to denote units of s
REFERENCES:
patent: 3915921 (1975-10-01), Schlatzer et al.
patent: 3919265 (1975-11-01), Bugaut et al.
patent: 3929404 (1975-12-01), Kalopissis et al.
patent: 3930865 (1976-01-01), Faust et al.
patent: 4023926 (1977-05-01), Bugaut et al.
patent: 4046786 (1977-09-01), Kalopissis et al.
patent: 4084052 (1978-04-01), Bugaut et al.
patent: 4093806 (1978-06-01), Kalopisis et al.
patent: 4112155 (1978-09-01), Carel et al.
patent: 4145299 (1979-03-01), Ford, Jr. et al.
patent: 4204059 (1980-05-01), Bugaut et al.
patent: 4213960 (1980-07-01), Grollier et al.
patent: 4260749 (1981-04-01), Bugaut et al.
patent: 4402977 (1983-09-01), Grollier et al.
patent: 4509949 (1985-04-01), Huang et al.
patent: 5030443 (1991-07-01), Varco et al.
patent: 5102655 (1992-04-01), Yoshihara et al.
patent: 5685882 (1997-11-01), Samain et al.
patent: 5989295 (1999-11-01), De Le Mettrie et al.
English language translation of JP 63-218,614, pp. 1-17, Sep. 1988.
English language translation of JP 1-213,221, pp. 1-18, Aug. 1989.
"L'Oreal"
Liott Caroline D.
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