Powder Composition Based On At Least One Fluoropolymer And At Least One Hydrophilic Polymer For A Separator Coating

Abstract: The present invention relates to a composition comprising a polymer P1 comprising monomer units derived from vinylidene fluoride and optionally a comonomer M1 compatible with vinylidene fluoride and a polymer P2 comprising monomer units derived from a monomer M2 of formula R1R2C=C(R3)C(O)R in which the substituents R1 R2 and R3 are independently selected from the group consisting of H and a C1 C5 alkyl; R is selected from the group consisting of ???NHC(CH3)2CH2C(O)CH3 or ???OR where R is selected from the group consisting of H and a C1 C18 alkyl optionally substituted by one or more ???OH groups or a five or six membered heterocycle comprising at least one nitrogen atom in its cyclic chain characterised in that the crystallisation temperature of the composition is Tc 3.7496x + 130 where x is the content by weight of the comonomer M1 relative to the total weight of the polymer P1 and in that the composition is in powder form.

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