Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Hair coloring
Patent
1993-12-29
1996-03-05
Venkat, Jyothsna
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Hair coloring
424 45, 424 61, 424 63, 424 64, 424 701, 424401, 424499, 424500, 424501, 424DIG5, 514844, A61K 7032, A61K 7027, A61K 702
Patent
active
054965438
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a product in the form of inorganic or organic particles containing an indoline-based product in or on the particles to a process for preparing it and to its use in cosmetics, in particular for making up the exoskeleton and/or the skin and protecting the human epidermis against UV radiation.
Pigments based on metal compounds, such as, for example, black and brown iron oxides, are generally used in makeup compositions for the skin and the exoskeleton. These pigments are not, however, completely harmless, and pigments capable of presenting fewer problems in their cosmetic application are consequently sought.
It is also desired, on some occasions, to be able to impart to the hair a coloration which can, if necessary, be removed very rapidly.
The Applicant has just discovered that it was possible to prepare in vitro a product in the form of a powder composed of inorganic or organic particles containing, in and/or on the particles, one or more indoline-based products resulting from the oxidative polymerization of at least one compound of the indoline family defined below.
He discovered that the use of this product in particle form was especially advantageous in as much as these particles, when introduced into a cosmetically acceptable medium, distribute well in then composition, which spreads readily on the exoskeleton or the skin and displays considerable covering power.
He also found that the product thereby obtained possessed an especially advantageous coefficient of absorption of ultraviolet radiation.
Lastly, the presence of indoline-based product, resulting from the oxidative polymerization of at least one indoline compound, makes it possible to obtain colorations of the final product which are especially advantageous in their use in cosmetics, inasmuch as the colorations capable of being obtained with the pigments which were available and compatible with cosmetic application were relatively limited. The colorations thereby obtained are especially stable to light.
The term "indoline-based product" or "indoline-based polymer" will be used hereinafter to denote the product obtained by oxidation of at least one indoline defined below.
The subject of the present invention is hence a powder consisting of inorganic or organic particles containing an indoline-based product in and/or on the particles.
Another subject of the invention consists of the preparation of such a powder.
The subject of the invention is also the cosmetic application of such powders, in particular in products for making up the skin and the exoskeleton and for protecting the human epidermis against UV radiation.
The term "exoskeleton" according to the invention will be used to denote the hair, hairs such as eyelashes and eyebrows and the nails.
Other subjects of the invention will become apparent on reading the description and examples which follow.
The product according to the invention is essentially characterized in that it takes the form of a powder consisting of inorganic or organic particles whose largest dimension is less than 200 microns and which contains, in and/or on the particles, a synthetic indoline-based product formed in situ by oxidative polymerization of at least one indoline.
The indoline-based product results from the oxidation of at least one compound of the indoline family, corresponding to the formula: ##STR1## in which:
R.sub.1 and R.sub.3 represent, independently of one another, a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group;
R.sub.2 represents a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group or a carboxyl or (C.sub.1 -C.sub.4 alkoxy) carbonyl group;
R.sub.4 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl, hydroxyl, (C.sub.1 -C.sub.4 alkoxy), amino or C.sub.1 -C.sub.10 alkylamino or halogen group;
R.sub.5 denotes a hydrogen atom or a hydroxyl, C.sub.1 -C.sub.4 alkoxy or amino group;
at least one of the radicals R.sub.4 or R.sub.5 denoting a hydroxyl, alkoxy or amino group; with the proviso that when R.sub.5 denotes an amino group, R.sub.4 cannot denote an alkylamino radical;
R.su
Andrean Herve
Junino Alex
Lagrange Alain
"L'Oreal"
Venkat Jyothsna
LandOfFree
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