Abstract: Linear block ethylenic copolymer comprising: at least two blocks with different glass transition temperatures (Tg); at least one of these blocks having a glass transition temperature of greater than or equal to 20° C.; said polymer also having mechanical parameters that satisfy at least one of the following three conditions: a Young's modulus E such that: 500 MPa?E?2000 MPa; an ultimate strain ?r such that: 5%??r?50%; an ultimate strain energy wr such that: 0.1×105 J/m3<wr<150×105 J/m3. Cosmetic composition comprising said polymer. The copolymer makes it possible to improve the styling power and the hold of a hair lacquer, to increase the adhesion and the wear strength of a nail varnish and to improve the staying power of a makeup composition without the compositions being tacky.

Abstract: A composition, comprising, in a physiologically acceptable medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of caring for the skin, in particular of the face, and more especially for treating, that is to say decreasing, erasing and/or smoothing out, wrinkles and/or fine lines of the skin.

Abstract: The invention relates to the cosmetic use of block ethylenic copolymers of elastic nature comprising at least one rigid block having a glass transition temperature (Tg) of greater than or equal to 20° C. and at least one flexible block having a glass transition temperature (Tg) which is less than 20° C., said compolymers making it possible to obtain a film having an instantaneous recovery of between 5% and 100%. The invention also relates to cosmetic compositions containing these block ethylenic polymers of elastic nature.

Abstract: The present disclosure relates to a nail varnish composition comprising at least one film-forming gradient copolymer exhibiting a mass polydispersity index (PI) of less than or equal to 2.5, the said composition being capable of forming a film exhibiting a rate of loss of weight of less than 1 mg/minute when the film is subjected to abrasion produced with the Taber abrasion tester at 23° C.

Abstract: The invention concerns novel anionic polyurethanes with elastic property, that is having an instantaneous elastic recovery ranging between 5% and 100% consisting essentially (a1) of anionic units derived from at least a monomer or polymer compound with sulphonic and/or phosphonic acid function and having at least two functions reactive to labile hydrogen, optionally (a2) non-ionic units derived from at least a non-ionic monomer or polymer compound having at least two functions reactive to labile hydrogen, and (b) units derived from at least a diisocyanate, provided that at least one type of the units (a1) and (a2) is derived from a polymer having a glass transition temperature (Tg) measured by differential enthalpy analysis, less than 10° C. and that said sequences with Tg less than 10° C. represent 20 to 90% of the total weight of the polyurethane. The invention also concerns cosmetic compositions containing the novel anionic polyurethanes with elastic property.

Abstract: A cosmetic or dermatological composition comprising at least one gradient copolymer comprising at least two different monomers, displaying a mass polydispersity index (Ip) less than or equal to 2.5 and for example, additionally a low composition polydispersity. A cosmetic or dermatological method for make-up or care of keratinous substances, notably the skin of the body or of the face, the nails, the hair and/or the eyelashes, comprising application of a cosmetic composition as defined above on the said substances.

Abstract: A nail varnish composition comprising, in a cosmetically acceptable medium, at least one film-forming gradient copolymer comprising at least two different monomeric units and exhibiting a mass polydispersity index (PI) of less than or equal to 2.5, the composition being capable of forming a film having an adhesion corresponding to a detachment percentage of less than 45%; a cosmetic process for making up and/or caring for the nails comprising the application to the nails of the cosmetic composition.

Abstract: A hair-cosmetic composition comprising, in a cosmetically acceptable medium, at least one film-forming gradient copolymer comprising at least two different monomeric residues, and displaying a mass polydispersity index (Ip) less than or equal to 2.5, wherein the composition is able to form a film that has a strain at break &egr;r ranging from 5% to 2500%, and/or a Young's modulus ranging from 0.5 to 1200 Mpa, and/or an instantaneous elastic recovery &egr;i greater than or equal to 10%. An aerosol composition packaged in an aerosol device, comprising a propellant and a haircare composition as defined above, and also a method for treating the hair, such as a styling method, comprising applying the haircare composition or the aerosol composition above to the hair.

Abstract: The present invention relates to a care, and/or treatment, and/or make-up cosmetic composition for keratin materials, comprising, in a physiologically acceptable medium, an efficient amount of at least one linear, branched or cyclic polymer, or dendrimer, comprising:

Abstract: A composition, comprising, in an appropriate medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of make-up and are capable of being applied to keratinous fibres, in particular to the nails, eyelashes, eyebrows and hair. In particular, these compositions can make it possible to obtain a film which exhibits good resistance to chipping, to impacts, to rubbing movements, to scratches and/or to pressing actions.

Abstract: The present invention relates to polyurethanes and a process for preparing them. These polyester polyurethanes contain units corresponding to the following formulae (I) and (II): The polyester polyurethanes according to the present invention form pseudolatices and may be utilized as film-forming resin in cosmetic compositions.

Abstract: The invention relates to water-soluble amphiphilic cationic associative polyurethanes of formula R—X—(P)n[L-(Y)m]r-L′-(P′)p—X′—R′, the molecule comprising at least one protonated or quaternized amine functional group and at least one hydrophobic group. The invention also relates to the use of these polyurethanes as thickeners or gelling agents in cosmetic compositions for topical application.

Abstract: The invention relates to the use of a composition comprising at least one conductive polymer in a cosmetically acceptable medium, said polymer being in soluble form in said medium, as, or for the manufacture of, cosmetic products for giving a visual effect to human keratin fibers and more particularly the hair, and also, when said conductive polymer absorbs in the visible region, as, or for the manufacture of, cosmetic products intended to color said fibers.

Abstract: A composition, in particular a cosmetic composition, comprising, in an appropriate medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of make-up and are capable of being applied to the skin, semi-mucous membranes and/or mucous membranes. In particular, these compositions can be provided in the form of a transfer-free make-up composition.

Abstract: A composition, comprising, in a physiologically acceptable medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of caring for or making up keratinous fibers, in particular as a mascara composition for the eyelashes or for the hair.

Abstract: Disclosed herein is a nail varnish composition comprising, in a cosmetically acceptable medium, at least one film-forming polymer, wherein the varnish composition is capable of forming a film having a rate of mass loss of less than 0.5 mg/minute when the film is subjected to abrasion produced with the Taber abrasimeter at 23° C., as well as a method for making up and/or non-therapeutic care of the nails comprising applying to the nails the composition.

Abstract: The invention concerns novel cationic polyurethanes with elastic character, that is having immediate recovery ranging between 5% and 95%, consisting essentially (a1) of cationic units derived from at leat a tertiary amine having at least two functions reactive to labile hydrogen, said tertiary amine being at least partly neutralised, (a2) non-ionic units derived from non-ionic polymer s bearing at their ends functions reactive to labile hydrogen and having a glass transition temperature (Tg), measured by differential heat content analysis, less than 10° C., optionally (a3) non-ionic units derived from non-ionic monomer compounds containing at least two functions reactive to labile hydrogen, and (b) units derived from at least a diisocyanate, and cosmetic compositions containing said polymers.

Abstract: The invention concerns a cosmetic composition comprising, in a cosmetically acceptable medium, at least a block copolymer consisting of at least two polymer blocks, each of the polymer blocks having a refractive index more or less by at least 0.1 unit than the refractive index of the neighbouring polymer block(s). Said composition can be used for hairstyling.

Abstract: A composition, comprising, in a physiologically acceptable medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of caring for the skin, in particular of the face, and more especially for treating, that is to say decreasing, erasing and/or smoothing out, wrinkles and/or fine lines of the skin.

Abstract: A composition suitable for topical application, which contains: a liquid fatty phase, at least one coloring agent, at least 2% by weight, with respect to the total weight of the composition, of a polymer which is dispersible in the liquid fatty phase, and a polymer which is soluble in the liquid fatty phase. In preferred embodiments, the composition may be provided in the form of a cast product or of a gel containing at least one coloring material, in particular pulverulent coloring material, a dispersion of polymer particles which are stabilized at the surface in a liquid fatty phase and a fat-soluble polymer of the vinylpyrrolidone copolymer type. In addition, according to the amount of polymer, it is possible to obtain, on the lips or skin, a supple film having notable transfer-free properties while being extremely comfortable. The invention also relates to the use of this dispersion in such a composition.