| 摘要 |
PURPOSE: To provide the liquid crystal orientation film which can be easily manufactured with no fear of impairing other elementary material, and can be concurrently used with plastics low in heat resistance and the like, and also enables various excellent characteristics to be obtained, which are such as a liquid crystal orientation capacity, heat resistance, transparency, strength, adhesion to a substrate and the like by containing polymers which comprise both a repeatable polyurea structural unit and a repeatable polyimide structural unit included in a same molucule. CONSTITUTION: Polymers are contained, which comprise both a repeatable polyurea structural units and a repeatable polyimide structural units included in a same molecule. Practically, the polymers comprise both the repeatable structural unit represented by a formula I, and the repeatable structural unit represented by a formula II included in a same molecule. In the formula I, R<1> represents an organic group of a divalent element or a single bonding, and R<2> represents an organic group of a divalent element. In the formula II, R<3> represents an organic group of a four valent element, and R<4> represents an organic group of a divalent element. The polymers thus obtained are soluble in an appropriate composition, an orientation film excellent in various characteristics can thereby be obtained by dissolving the polymers in an appropriate solvent, coating solution obtained over the surface of a substrate, and drying it thereafter. |
