According to the present invention, there are provided a film forming composition, which contains a polymer having a repeating unit represented by General Formula (I) and a curable compound, an optical film having a film formed of the composition, a hardcoat film, a polarizing plate, and a method for manufacturing a hydrophilized hardcoat film. In General Formula (I), R1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, L represents an ester bond, an ether bond, a phenylene group, or an amide bond, R2 and R4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, or a halogenated alkyl group having 1 to 20 carbon atoms, and R3 represents a hydrogen atom or a substituent.
                            根据本发明,提供了一种成膜组合物,该组合物含有一种具有通式(I)所代表的重复单元的聚合物和一种可固化化合物;还提供了一种具有由该组合物形成的薄膜的光学薄膜、一种硬涂层薄膜、一种偏光板和一种制造亲
水硬涂层薄膜的方法。在通式(I)中,R1 代表氢原子或具有 1 至 20 个碳原子的烷基,L 代表酯键、醚键、亚苯基或酰胺键,R2 和 R4 各自独立地代表氢原子、卤素原子、具有 1 至 20 个碳原子的烷基或具有 1 至 20 个碳原子的卤代烷基,R3 代表氢原子或取代基。