| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a film having excellent hydrolysis resistance and a good surface condition. <P>SOLUTION: The film comprises a polymer, characterized in that the polymer comprises polymer structural units containing a -N=C=N- structure and a -N=C(R)-NH- structure in the main chain (but does not contain an ester bond in the main chain, and R represents a polyester structure bound with a C atom at one end), and comprises as the polymer structural units, a polymer constitutional unit A of which the number average molecular weight of the part excluding R is 1,000-4,000 and a polymer structural unit B of which the number average molecular weight of the part excluding R is 18,000 or more. <P>COPYRIGHT: (C)2013,JPO&INPIT |
