COSMETIC COMPOSITION COMPRISING AT LEAST ONE POLYHYDROXYALKANOATE

The present disclosure falls within the field of cosmetic formulations and more particularly cosmetic compositions comprising biopolymers belonging to the polyhydroxyalkanoate family, and having an increased persistence of at least one cosmetic and/or care effect provided after application of the composition, and also good adhesion of the composition after application to keratin materials. A subject of the present invention is a cosmetic composition comprising at least one polyhydroxyalkanoate copolymer characterized in that said polyhydroxyalkanoate copolymer consists of a repetition of polymer units of formula (A1) and of polymer units of formula (B1) such as: Formula (A1): -[-O-CH(R1)-(CH2)n-CO-]- Formula (B1): -[-O-CH(R2)-(CH2)m-CO-]- in which: R1 is an n-propyl group, R2 is an n-pentyl group; n and m are equal to 1, said polyhydroxyalkanoate copolymer comprising 2 to 10 mol% of polymer units of formula (A1) and 98 to 90 mol% of polymer units of formula (B1). According to another aspect, the invention relates to the use of a polyhydroxyalkanoate copolymer consisting of a repetition of polymer units of formulae (A1) and (B1), as previously defined, as a film-forming agent in cosmetic compositions.