RESIN COMPOSITION CONTAINING PHOTOREACTIVE POLYMER, AND OPTICAL THIN FILM

To provide a resin composition of a polymer that orients even under a low heating temperature of 200°C or lower, and develops a high phase difference such as a phase difference Re/thickness of 100 nm or more.SOLUTION: A resin composition contains 70 to 99.99 wt.% of a polymer containing 1 to 50 mol% of a structural unit represented by the following formula (1) and 0.01 to 30 wt.% of a thermal reorientation accelerator having a molecular weight of 200 to 10000. (In the formula, each of a ring A, a ring B and a ring C is independently a ring selected from the group consisting of monocyclic aromatic rings, polycyclic aromatic rings, and condensed ring aromatic rings having ring-constituting atoms selected from the group consisting of C, N, O, and S, and each of R1 and R2 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, etc., X is an alkoxy group having 1 to 5 carbon atoms, etc., Y is a hydrogen atom, an alkoxy group having 1 to 5 carbon atoms, etc., and each of S1 and S2 represents a spacer group or a single bond)SELECTED DRAWING: None 【課題】２００℃以下の低い加熱温度の下でも配向し、かつ、位相差Ｒｅ／厚みが１００ｎｍ以上という高い位相差を発現する重合体の樹脂組成物を提供する。【解決手段】下記式（１）で示される構成単位を１～５０ｍｏｌ％含有するポリマーを７０～９９．９９重量％、分子量が２００～１００００の熱再配向促進剤を０．０１～３０重量％を含有する樹脂組成物。JPEG2023081407000034.jpg3977（式中、環Ａ、環Ｂ及び環Ｃは、独立して、Ｃ、Ｎ、Ｏ及びＳからなる群より選ばれる原子を環構成原子とする、単環式芳香環、多環式芳香環、並びに縮環式芳香環からなる群より選ばれる環、Ｒ１及びＲ２は、水素原子、炭素数１～２０のアルキル基等、Ｘは、炭素数１～５のアルコキシ基等、Ｙは、水素原子、炭素数１～５のアルコキシ基等、Ｓ１及びＳ２は、スペーサー基又は単結合を表す）【選択図】なし