Abstract: The present patent application relates to novel surface-active cationic compounds, to their use, in particular as hair conditioning agent, to a cosmetic treatment method, in particular for the hair, employing the said compounds, and to the cosmetic or pharmaceutical compositions, in particular hair compositions, comprising the said surfactants.

Abstract: The present invention relates to the use, for dyeing keratin fibres, of at least one specific compound containing active methylene and of at least one compound chosen from an aldehyde, a ketone, a quinone and a diiminoisoindoline or 3-aminoisoindolone derivative, which makes it possible to obtain, by reaction without an oxidizing agent, a coloration of the said keratin fibres.

Abstract: A process for strengthening the hair, and a process for improving the compatibility of a treatment for waving the hair with a subsequent different cosmetic treatment are disclosed herein. The processes comprise applying to the hair a composition at neutral pH comprising, in a cosmetically acceptable medium, at least one derivative of 2-iminothiolane of formula (1), and/or the water soluble salts thereof.

Abstract: The disclosure relates to the use of dithiols for strengthening keratin materials, and to novel dithiols and to cosmetic compositions comprising them.

Abstract: The present disclosure relates to the cosmetic use of poly-N-?- and -N-?-lysine and ornithine compounds comprising a thiol function. The disclosure is also directed towards poly-N-?- and -N-?-lysine and ornithine compounds comprising a thiol function and also to cosmetic compositions containing the disclosed compounds.

Abstract: An embodiment disclosed herein is the use in cosmetics of at least one dithiol comprising an amide functional group for transforming the shape of the hair. Also disclosed herein are cosmetic compositions comprising at least one dithiol comprising an amide functional group in a cosmetically acceptable medium.

Abstract: Diiminoisoindoline derivatives or 3-aminoisoindolone derivatives, or tautomeric forms thereof, used as oxidizing-agent-free dye precursors in dyeing keratin fibers, in particular human keratin fibers such as the hair, without an oxidizing agent, in the presence of compounds containing a primary or secondary amine function; dye compositions containing these compounds and to the dyeing devices and processes used.

Abstract: Pyrrole derivatives of 1,4-naphthoquinone and of 1,4-dihydroxynaphthalene, dye compositions containing them and the corresponding dyeing process.

Abstract: A process for the two-stage oxidation dyeing of keratin fibers by applying to the keratin fibers:in a first stage, at least one composition A containing at least one manganese salt and/or a manganese complex,in a second stage, at least one composition B having a pH of greater than or equal to 6, and resulting from the extemporaneous mixing of at least one composition B1 containing at least one 4-substituted 1-naphthol and at least one composition B2 containing at least one oxidizing agent, and corresponding multi-compartment dyeing kit.

Abstract: A mineral or organic particle-based product comprising an indoline product, a method for preparing same, and the use thereof in cosmetics. The product is a powder consisting of mineral or organic particles smaller than 200 microns, and comprises, in and/or on the particles, an indoline product obtained by oxidative polymerization using at least one indoline.

Abstract: Process for the temporary dyeing of keratinous fibers with a composition containing an insoluble pigment obtained by the oxidative polymerization of an indole compound of formula (I) ##STR1## in which R.sup.1 and R.sup.3 are hydrogen or alkyl; R.sup.2 is hydrogen, alkyl carboxyl or alkoxy carbonyl; R.sup.4 and R.sup.7 are hydrogen, hydroxy, alkyl, amino, alkoxy, acyloxy or acylamino; R.sup.5 is hydrogen, hydroxy, alkoxy, alkyl, halogen, amino, acyloxy, acylamino or trimethylsilyloxy; R.sup.6 is hydrogen, hydroxy, alkoxy, amino, acyloxy, acylamino, trimethylsilyloxy or hydroxyalkylamino; R.sup.5 and R.sup.6 can also form, together with the carbon atoms to which they are attached, a carbonyl-dioxy ring; at least one of the radicals R.sup.4 to R.sup.7 is an OZ or NHR.sup.8 grouping, the R.sup.8 radical of the NHR.sup.8 grouping being hydrogen, acyl or hydroxyalkyl and the Z radical of the OZ grouping being hydrogen, acyl, alkyl or a trimethylsilyl group.

Abstract: The invention relates to a dispersion of melanic pigments containing in a medium selected amongst: a) the straight or branched monoalcohols comprising at least 3 carbon atoms; the straight or branched polyols comprising at least 2 carbon atoms; the saturated or unsaturated cycloaliphatic alcohols comprising at least 6 carbon atoms; the aromatic alcohols comprising at least 6 carbon atoms; the C.sub.8 -C.sub.22 fatty acid esters and C.sub.1 -C.sub.6 alcohol esters or the C.sub.2 -C.sub.6 polyol esters; the C.sub.1 -C.sub.6 aliphatic acid esters or the C.sub.8 -C.sub.22 aromatic acid and fatty alcohol esters; the C.sub.8 -C.sub.22 fatty acid esters and the C.sub.8 -C.sub.22 fatty alcohol esters, the C.sub.6 -C.sub.

Abstract: A product in the form of colored inorganic particles including one or a number of melanin pigments, a process for its preparation and to its use, especially in the field of cosmetics, for make-up for the exoskeleton and/or for the skin, and in protecting human skin against UV radiation.

Abstract: The invention relates to indoline compounds of formula (I): ##STR1## in which: R.sub.1 and R.sub.2 denote hydrogen, alkyl, monohydroxyalkyl, polyhydroxyalkyl, nitro, hydroxyl, alkoxy or NHR where R can be hydrogen, alkyl, monohydroxyalkyl or polyhydroxyalkyl;X denotes oxygen or sulfur;R.sub.3 represents --OR.sub.4 or NR.sub.5 R.sub.6 whereR4 denotes alkyl, alkenyl, benzyl, alkoxyalkyl or haloalkyl;R.sub.5 and R.sub.6 denote alkyl;R.sub.1 and R.sub.2 not simultaneously denoting hydrogen or nitro and when R.sub.1 denotes alkyl, alkoxy or mono- or polyhydroxyalkyl, R.sub.2 denotes NHR or hydroxyl,and to their use in dyeing keratinous fibers.

Abstract: The invention relates to a process for the preparation of a melanic pigment, comprising the polymerisation of a compound corresponding to the formula: ##STR1## in which: R denotes a hydrogen atom, an alkyl, alkoxy, hydroxyalkyl, SiR.sub.4 R.sub.5 R.sub.6 or aminoalkyl radical, or an aryl radical which is unsubstituted or substituted by OH, NH.sub.2, alkyl, alkoxy or NO.sub.2 ;R.sub.1 and R.sub.2 denote alkyl groups or together form a methylene or ethylene group which is optionally substituted by one or more alkyl groups, and R.sub.2 denotes hydrogen or COOH, in the presence of an oxidizing medium and of an enzyme with (per)oxidizing activity or of a compound which has a similar activity, and to powders which make use of them and to their cosmetic use.

Abstract: The invention relates to a product in powder form consisting of organic or inorganic particles having a lamellar structure, having a size of less than 50 microns and containing at least one synthetic melanotic pigment formed in situ by oxidation of an indole compound, and to its use for the protection of the human epidermis, in make-up products and for dyeing hair.

Abstract: 5-Substituted ortho-aminophenols of formula: ##STR1## in which: R.sub.1 denotes a hydrogen atom, an alkyl radical having 1 to 4 carbon atoms or a hydroxyalkyl radical having 1 to 4 carbon atoms; andR.sub.2 denotes, independently of R.sub.1, an alkyl radical having 1 to 4 carbon atoms, an alkoxy radical having 1 to 4 carbon atoms or a benzyl radical;the addition salts with an acid and the phenates, anddyeing composition containing a compound of formula (I) or a salt or a phenate of such a compound.The 5-substituted ortho-aminophenols enable hair to be dyed in a rich spectrum of hues having good durability.

Abstract: Use for dyeing keratinous fibres, and especially human hair, on a compound corresponding to the formula: ##STR1## in which X denotes a bromine or chlorine atom.