Abstract: The instant disclosure relates hair care compositions comprising ionic liquids or ionic mixtures. Ionic liquids or ionic mixtures are combined with a cosmetically acceptable carrier to form ready-to-use hair care compositions. The ionic liquids and the ionic mixtures are formed from; (1) thiolactic acid and/or one or more alkali metal or alkaline earth metal salts thereof; and (2) one or more amine compounds, and/or one or more ammonium cationic compounds, and/or one or more salts thereof. The ionic liquids, the ionic mixtures, and the hair care compositions comprising the ionic liquids or the ionic mixtures, are useful in methods for preventing hair damage, shaping hair, caring for hair, etc.

Abstract: The invention relates to a cosmetic composition, especially a hair composition, and to a method for the cosmetic treatment of keratin materials, especially of the hair, employing compounds of formula: in which Z represents (i) a hydrogen atom, (ii) a linear or branched C1 to C32 (saturated) alkyl radical; (iii) a linear or branched C2 to C32 (unsaturated) alkene radical, comprising one or two C?C double bonds; (iv) an aryl-substituted alkyl radical; said radicals being optionally substituted and/or interrupted.

Abstract: The present invention relates to a cosmetic process for treating keratin materials, which can give them, especially in a long-lasting and reversible manner, interesting cosmetic properties; this process comprising the application to said materials: in a first stage, of a cosmetic composition comprising at least one graftable species, comprising at least one unit of formula (Ia): and in a second stage, of a cosmetic composition comprising at least one cosmetic active agent bearing at least one unit of formula (Ia): The invention also relates to a kit comprising said compositions.

Abstract: The present invention relates to a cosmetic process for treating keratin materials, which can give them, especially in a long-lasting and reversible manner, interesting cosmetic properties; this process comprising the application to said materials: in a first stage, of a cosmetic composition comprising at least one graftable species, comprising at least one unit of formula (Ia): and in a second stage, of a cosmetic composition comprising at least one cosmetic active agent bearing at least one unit of formula (Ia): The invention also relates to a kit comprising said compositions.

Abstract: The present invention relates to a cosmetic process for treating keratin materials, which can give them, especially in a long-lasting and reversible manner, interesting cosmetic properties; this process comprising the application to said materials: in a first stage, of a cosmetic composition comprising at least one graftable species, comprising at least one unit of formula (Ia): and in a second stage, of a cosmetic composition comprising at least one cosmetic active agent bearing at least one unit of formula (Ia): The invention also relates to a kit comprising said compositions.

Abstract: The invention relates to a composition for dyeing keratin materials, and in particular human keratin fibres such as the hair, comprising at least one 2-pyrrolidone functionalized in the 4 position with an ester or amide radical, and at least one hydrophobic direct dye or a pigment; a dyeing process using this composition. Similarly, the invention relates to the use of the said pyrrolidone combined with a direct dye or a pigment for dyeing keratin materials, and especially to the use of the said pyrrolidone for improving the colour uptake onto the fibres of direct dyes that are sparingly soluble or insoluble in aqueous-alcoholic supports. The invention also relates to novel pyrrolidone derivatives. The present invention makes it possible in particular to obtain direct dyeing on keratin materials that is fast, resistant to washing, chromatic and powerful.

Abstract: The present invention relates to a cosmetic process for treating keratin materials, which can give them, especially in a long-lasting and reversible manner, interesting cosmetic properties; this process comprising the application to said materials: in a first stage, of a cosmetic composition comprising at least one graftable species, comprising at least one unit of formula (Ia): and in a second stage, of a cosmetic composition comprising at least one cosmetic active agent bearing at least one unit of formula (Ia): The invention also relates to a kit comprising said compositions.

Abstract: The present invention relates to the use of polyols of formula (I): or a salt thereof, for preventing the hair from breaking. The invention also relates to a cosmetic composition comprising at least one such polyol or a salt thereof, in a cosmetically acceptable medium, and also to a cosmetic hair treatment process using the said composition.

Abstract: The invention relates to a composition for dyeing keratin materials, and in particular human keratin fibres such as the hair, comprising at least one 2-pyrrolidone functionalized in the 4 position with an ester or amide radical, and at least one hydrophobic direct dye or a pigment; a dyeing process using this composition. Similarly, the invention relates to the use of the said pyrrolidone combined with a direct dye or a pigment for dyeing keratin materials, and especially to the use of the said pyrrolidone for improving the colour uptake onto the fibres of direct dyes that are sparingly soluble or insoluble in aqueous-alcoholic supports. The invention also relates to novel pyrrolidone derivatives. The present invention makes it possible in particular to obtain direct dyeing on keratin materials that is fast, resistant to washing, chromatic and powerful.

Abstract: The invention relates to a cosmetic composition, especially a hair composition, and to a method for the cosmetic treatment of keratin materials, especially of the hair, employing compounds of formula: in which Z represents (i) a hydrogen atom, (ii) a linear or branched C1 to C32 (saturated) alkyl radical; (iii) a linear or branched C2 to C32 (unsaturated) alkene radical, comprising one or two C?C double bonds; (iv) an aryl-substituted alkyl radical; said radicals being optionally substituted and/or interrupted.

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 disclosure relates to specific dimercaptoamides, reducing compositions for permanently reshaping keratin fibers comprising the dimercaptoamides, for instance, human keratin fibers such as the hair; and processes for reshaping keratin fibers comprising the application of said reducing compositions. The present disclosure also relates to processes for preparing the dimercaptoamides.

Abstract: The invention concerns the use in a cosmetic composition of at least a poly-aminoacid of general formula (1) in which X is —O—, —S— or —NR3; R1 represents in particular a hydrogen atom or a C1-C40 alkyl radical; R2 represents in particular a hydrogen atom or an optionally substituted alkyl radical; R3 represents a hydrogen atom or an alkyl radical; R4 represents a hydrogen atom or a radical such as NH2, OH, SH, —CHOHCH3, —CONH2; n is a number greater than 1 such that the poly-aminoacid derivative molecular weight ranges between 200 and 200000. The invention also concerns the use of said derivatives for keratinous fiber strengthening and care.

Abstract: The invention concerns the use in a cosmetic composition of at least a poly-aminoacid of general formula (1) in which X is —O—, —S— or —NR3; R represents in particular a hydrogen atom or a C1-C10 alkyl radical; R2 represents in particular a hydrogen atom or an optionally substituted alkyl radical; R3 represents a hydrogen atom or an alkyl radical; R4 represents a hydrogen atom or a radical such as NH2, OH, SH, —CHOHCH3, —CONH2; n is a number greater than 1 such that the poly-aminoacid derivative molecular weight ranges between 200 and 200000. The invention also concerns the use of said derivatives for keratinous fibre strengthening and care.

Abstract: The present disclosure relates to novel N-alkylpolyhydroxylated secondary para-phenylenediamines, to processes for preparing them, to compositions for dyeing keratin fibers, for example keratin fibers such as the hair, comprising, in a medium that is suitable for dyeing, at least one such secondary para-phenylenediamine. The present disclosure also relates to processes for dyeing keratin fibers with the compositions according to the present disclosure, and to dyeing kits containing such compositions.

Abstract: The present invention relates to the use of aminodithiols as reducing agents for hair perming. It further relates to a hair perming method using these aminodithiols.

Abstract: The invention concerns the use in a cosmetic composition of at least a poly-aminoacid of general formula (1) in which X is —O—, —S— or —NR3; R1 represents in particular a hydrogen atom or a C1-C40 alkyl radical; R2 represents in particular a hydrogen atom or an optionally substituted alkyl radical; R3 represents a hydrogen atom or an alkyl radical; R4 represents a hydrogen atom or a radical such as NH2, OH, SH, —CHOHCH3, —CONH2; n is a number greater than 1 such that the poly-aminoacid derivative molecular weight ranges between 200 and 200000. The invention also concerns the use of said derivatives for keratinous fibre strengthening and care.

Abstract: The invention concerns the use in a cosmetic composition of at least a poly-aminoacid of general formula (I) in which X is —O—, —S— or —NR3; R1 represents in particular a hydrogen atom or a C1-C40 alkyl radical; R2 represents in particular a hydrogen atom or an optionally substituted alkyl radical; R3 represents a hydrogen atom or an alkyl radical; R4 represents a hydrogen atom or a radical such as NH2, OH, SH, —CHOHCH3, —CONH2; n is a number greater than 1 such that the poly-aminoacid derivative molecular weight ranges between 200 and 200000.

Abstract: The present invention relates to an aqueous reducing composition, for the first step of a process to permanently reshape the hair, comprising in a cosmetically acceptable medium, as reducing agents, one or more dicarboxydithiols of general formula (I) and/or of general formula (II): wherein: R1, R2, R?1, R?2 independently represent OR3 or NR4R5, where R3 represents H or a linear or branched C1-C5 alkyl group optionally substituted by one or two OR7 radicals, where R7 represents H or a C1-C3 alkoxy radical, R4, R5 are independently H or a linear or branched C1-C5 alkyl group optionally substituted by one or two radicals selected from hydroxy, methoxy, ethoxy, methylamino, ethylamino and dimethylamino radicals, R1 and R2 not being simultaneously a hydroxyl radical and R?1 and R?2 not being simultaneously a hydroxyl radical; A either represents (CH2)n where n is an integer ranging from 1 to 4, or a —(CH2)m—X—(CH2)p— radical, where m is 1 or 2, p is 1 or 2 and X represents O, S, NHCO or NR6, where R6 repr

Abstract: The present disclosure relates to a ready-to-use cosmetic composition for relaxing keratin fibers in a cosmetically acceptable medium comprising, as an active relaxing agent, a polyguanidine not belonging to the hydroxide family. The present disclosure is also directed to a multi-compartment kit comprising at least two compartments to be placed in contact to form the ready-to-use composition. Another aspect of the present disclosure relates to a process for using the presently disclosed composition.