Abstract: The present invention relates to the use of AB block copolymer composition as a surface coating wherein the composition comprises (a) an AB block copolymer; and (b) a liquid medium and wherein the AB block copolymer comprises: (a) a substantially hydrophobic block A, and (b) a substantially hydrophilic block B wherein the hydrophobic block A comprises one or more monomer of formula (A) wherein R is H or C1 to C4 alkyl; Z is O, P or N; and R? is selected from the group comprising: C1 to C18 linear or non linear alkyl; C1 to C18 alkylamino alkyl; C1 to C18 dihydroxyalkyl; C1 to C18 silylalkyl; epoxy alkyl, phosphoryl or phosphoryl alkyl; a styrene based monomer; a vinyl phosphonate or phosphoric acid monomer; and wherein the liquid medium comprises either: (i) water; (ii) an organic solvent; (iii) an organic solvent substantially free from water; or (iv) an organic solvent and water; and wherein: the liquid medium further optionally comprises one or more additive, surfactant or wetting agent.