POWDER COMPOSITION BASED ON AT LEAST ONE FLUOROPOLYMER AND AT LEAST ONE HYDROPHILIC POLYMER FOR SEPARATOR COATING

The present invention relates to a composition comprising a polymer P1 comprising monomer units derived from vinylidene fluoride and a polymer P2 comprising monomer units derived from a monomer M2 of formula RRC═C(R)C(O)R in which the substituents R, Rand Rare, independently of each other, selected from the group consisting of H and C-Calkyl; R is selected from the group consisting of —NHC(CH)CHC(O)CHor —OR′ with R′ selected from the group consisting of C-Calkyl optionally substituted by one or more —OH group(s) or a five- or six-membered heterocycle comprising at least one nitrogen atom in its cyclic chain, characterised in that the difference between the melting temperature and the crystallisation temperature of the composition is greater than or equal to 40° C. and in that the composition is in powder form.