| abstract |
Linear block ethylenic copolymer comprising: - at least two blocks having different glass transition temperatures (Tg); - at least one of these sequences having a glass transition temperature greater than or equal to 20 ° C; said polymer having, in addition, mechanical parameters which satisfy at least one of the following three conditions: a YOUNG E modulus, such as: 500 MPa ≤ E ≥ 2000 MPa; - a strain at break δr, such that: 5% ≤ εr ≤ 50%; - a deformation energy at break Wr, such that: 0.1 x 105 J / m3 <Wr <150. 105 J / m3. Cosmetic composition comprising said polymer. The copolymer makes it possible to improve the styling power and hold of a hair spray, to increase the adhesion and wear resistance of a nail varnish and to improve the hold of a makeup composition. without the compositions being sticky. |