PVDF coating compositions

A vinylidene fluoride (VDF) polymer composition comprising: at least one VDF polymer [polymer (F)]; and at least one additive obtained by treating inorganic particles with a mixture of modifying agents comprising: at least one fluoro-containing modifying agent [agent (X)] of formula: X4-mAYm wherein m is an integer from 1 to 3, A is a metal selected from the group consisting of Si, Ti and Zr, each of Y, equal to or different from each other, is a hydrolysable group, each of X, equal to or different from each other is a C1-C24 (hydro)(fluoro)carbon group, wherein at least one of X is a fluorine-containing C1-C24 group; and at least one hydrogen-containing functional modifying agent [agent (Z)] of formula: Z4-pEYp wherein p is an integer from 1 to 3, E is a metal selected from the group consisting of Si, Ti and Zr, each of Y, equal to or different from each other, is a hydrolysable group, each of Z, equal to or different from each other is a C1-C24 hydrocarbon group, wherein at least one of Z comprises a functional group selected from the group consisting of ethylenically unsaturated group; epoxy group; mercapto group; carboxylic acid group, and sulphonic group.