The invention relates to a polymer comprising: a) at least one polyether polyester copolymer segment, wherein the polyether polyester copolymer comprises ether units selected from the group consisting of the formula (II) —[CR12]n—O—, wherein n is an integer of 2 to 4, R1 represent independent of each other organic groups having 1 to 30 carbon atoms or hydrogen, and wherein in case n is equal to 2 at least one of the R1 represents an ether group having the formula —R2—O—R3, wherein R2 and R3 independent of each other represent organic groups having 1 to 30 carbon atoms, and b) at least one polysiloxane segment linked to the at least one polyether polyester copolymer segment.