abstract |
Humidity-dependent improver for polymer films, comprising compounds of the following formula (1) or (2): formula (1) formula (2) Wherein Ra, Rb and Rc represent alkyl, alkenyl, alkynyl, aryl or heterocyclic group; X 1 to X 6 represent single bond or divalent linking group; R 1 to R 6 represent hydrogen atom, alkyl, alkenyl, alkynyl, aryl or heterocyclyl. |