An improved liquid crystal-aligning coating composed mainly of a specified polymer, for example a polyether polyimide or a polyimide, and capable of controlling the alignment and pretilt angle of liquid crystals; a liquid crystal display element using the coating; and a dinitro compound and a diol compound each as an intermediate of a diamino compound constituting the polyimide ether, are provided.
The polymer contains in its molecular chain, a substituted cyclohexylidene group or a cyclohexylidene group expressed by the formula
wherein R₁ to R₆ of the cyclohexyl group each represent H, C₁ to C₁₅ alkyl group, a cyclohexyl group or a cyclohexyl group having a C₁ to C₁₅ alkyl group, and may be each the same or partly or totally different.
本发明提供了一种主要由特定聚合物(例如聚醚聚
酰亚胺或聚
酰亚胺)构成并能控制液晶对准和前倾角度的改进型液晶对准涂层;一种使用该涂层的液晶显示元件;以及一种二
硝基化合物和一种二元醇化合物,各自作为构成聚
酰亚胺醚的二
氨基化合物的中间体。
该聚合物的分子链中含有一个取代的亚环己基基团或一个由式表示的亚环己基基团
其中环己基的 R₁ 至 R₆ 各自代表 H、C₁ 至 C₁₅ 烷基、环己基或具有 C₁ 至 C₁₅ 烷基的环己基,并且可以各自相同或部分或完全不同。