or organic solvents, such as alcohols, can be employed as solvents.A polymer composition which comprises the following composition components is preferred according to the invention: at least 10, preferably at least 15 and particularly preferably at least 20 wt. % of a polymer;from 0.05 to 20, preferably 0.1 to 10 and particularly preferably 1 to 8 wt. % of the ester product;from 0 to 10, prefera