| abstract |
Linear blocky ethylenic copolymer comprising: - at least one block A capable of being prepared from monomers, consisting mainly of an ethylenic monomer with a lactam ring, and in minority of at least one non-hydrophilic monomer; - and at least one block B capable of being prepared from monomers not comprising an ethylenic monomer with a lactam ring or comprising a minor proportion thereof.Cosmetic or pharmaceutical composition, in particular hair composition comprising the said copolymer.Process cosmetic makeup or for caring for keratin materials comprising the application to keratin materials of such a composition.Use of copolymers for improving the styling power and / or the hold of the hairstyle, without tackiness, in particular to the touch, of a hair spray; use of copolymers to improve adhesion and wear resistance, without tackiness, in particular to the touch of a nail varnish; use of the copolymers to improve the hold of a makeup composition; use of the copolymers for reducing the tackiness, in particular to the touch, of a cosmetic composition, in particular under high humidity conditions, for example for RH of 50% to 100%; use of the copolymers in a cosmetic composition such as a care or make-up composition for masking wrinkles, which gives the skin a smooth appearance, without tightness. |