like for example statistically random copolymers for example with a monomer sequence such as p 1 p 2 p 1 p 1 p 3 p 2 p 1 p 3 alternating copolymers for example with a monomer sequence such as p 1 p 2 p 1 p 2 or p 1 p 2 p 3 p 1 p 2 p 3 or block copolymers for example with a monomer sequence such as p 1 p 1 p 1 p 2 p 2 p 2 p 3 p 3 p 3 with the groups sp g and r not being shown for sake of simplicity as well as blends thereof with other polymers further preferred are polymers comprising one or more recurring units p 1 sp g m p 2 r n p 3 o p wherein m 1 and n o 0 very preferably consisting exclusively of such recurring units further preferred are polymers comprising one or more recurring units p 1 sp g m p 2 r n p 3 o p wherein m n 1 and o 0 very preferably consisting exclusively of such recurring units further preferred are polymers comprising one or more recurring units p 1 sp g m p 2 r n p 3 o p wherein m o 1 and n 0 very preferably consisting exclusively of such recurring units further preferred are polymers comprising one or more recurring units p 1 sp g m p 2 r n p 3 o p wherein m n o 1 very preferably consisting exclusively of such recurring units for the polymer backbone in principle all polymers can be used that are known to the skilled in the art very preferred are polymer chains that have a certain flexibility and solubility these may be linear branched.