Diamino compounds, dinitro compounds, diol compounds and a process for preparing the diamino compounds which are useful as materials of poly-imide compounds for obtaining aligning films having high pretilt angles in liquid crystal display elements are provided.
The diamino compounds are represented by the general formula:
wherein R₁-R₆ are a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, respectively, and R₇-R₁₂ are a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, F or Cl respectively.
本发明提供了二
氨基化合物、二
硝基化合物、二元醇化合物以及制备二
氨基化合物的工艺,这些二
氨基化合物可用作聚
酰亚胺化合物的材料,用于获得液晶显示元件中具有高前倾角的对准膜。
二
氨基化合物由通式表示:
其中 R₁-R₆ 分别为氢原子或具有 1 至 22 个碳原子的烷基,R₇-R₁₂ 分别为氢原子、具有 1 至 3 个碳原子的烷基、F 或 Cl。