申请人:Konishi Takahisa
公开号:US20090116109A1
公开(公告)日:2009-05-07
The object of the present invention is to provide an optical film excellent in transparency, heat resistance and processability. An optical film containing a polymer having at least a repeating unit represented by following general formula (I):
wherein in the general formula (I), R
1
and R
3
each independently denote a hydrogen atom, a straight-chain or branched alkyl group with a carbon number of 1 to 4, or a substituted or unsubstituted phenyl group; R
2
, A and B each independently denote a hydrogen atom, a halogen atom, a straight-chain or branched alkyl group with a carbon number of 1 to 4, a straight-chain or branched alkyl halide group with a carbon number of 1 to 4, a straight-chain or branched alkoxy group with a carbon number of 1 to 4, an alkoxycarbonyl group, an acyloxy group, an amino group, an azide group, a nitro group, a cyano group or a hydroxyl group (however, R
2
is not a hydrogen atom); R
4
denotes a hydrogen atom, a straight-chain or branched alkyl group with a carbon number of 1 to 4, a substituted or unsubstituted cycloalkyl group with a carbon number of 5 to 10, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted heterocyclic group; R
5
denotes a hydrogen atom, a straight-chain or branched alkyl group with a carbon number of 1 to 4, a benzyl group, a silyl group, a phosphoric acid group, an acyl group, a benzoyl group or a sulfonyl group; l, m and n denote an integer of 2 or more.