A fluorine-containing copolymer of the following formula. A film-forming composition containing the copolymer. An anti-reflection film having a low-refractive-index layer containing the copolymer. An anti-reflection film having the above anti-reflection film on a transparent support. An image display device having the anti-reflection film. formula
1
In the formula, Rf
1
represents a specific fluorine-containing alkyl group; Rf
2
represents a specific perfluoroalkyl group; A represents a constituent having at least one reactive group capable of contributing to a cross-linking reaction; B represents an arbitrary constituent; a to d each represent a mole fraction (%) of each constituent, which satisfy the following conditions:
55≦
a+b
≦95, 5≦
a
≦90, 5≦
b
≦70, 5≦
c
≦45, 0≦
d
≦40
以下是中文翻译:
一种含
氟共聚物,其
化学式如下。一种含有该共聚物的成膜组合物。一种具有低折射率层的抗反射膜,其中包含该共聚物。一种在透明支撑体上具有上述抗反射膜的抗反射膜。一种具有抗反射膜的图像显示装置。其中,
化学式中,Rf1表示特定的含氟烷基;Rf2表示特定的
全氟烷基;A表示至少具有一个反应性基团能够参与交联反应的组分;B表示任意组分;a到d分别表示每个组分的摩尔分数(%),满足以下条件:55≤a+b≤95,5≤a≤90,5≤b≤70,5≤c≤45,0≤d≤40。