Diamino compounds, useful as raw materials for polyimide compounds for an aligning film in a liquid crystal display element, (and precursors for such diamino compounds) have the formula:
in which R₁, R₂, R₃, R₄, R₅ and R₆ are the
same or are different and each is a hydrogen atom or C₁₂-C₂₂ alkyl group; R₇, R₈, R₉, R₁₀, R₁₁,
R₁₂, R₁₃ and R₁₄ are the same or are different and each is a hydrogen atom or a C₁-C₃ alkyl group; and Y is an amino, nitro or hydroxyl group.
可用作液晶显示元件对准膜聚
酰亚胺化合物原料的二
氨基化合物(以及此类二
氨基化合物的前体)具有如下式子:
其中 R₁、R₂、R₃、R₄、R₅ 和 R₆ 相同或不同,且各自为原子
相同或不同,且各自为氢原子或 C₁₂-C₂₂ 烷基;R₇、R₈、R₉、R₉、R₁₀、R₁₁、
R₁₂、R₁₃ 和 R₁₄ 相同或不同,且各自为氢原子或 C₁-C₃ 烷基;以及 Y 为
氨基、硝基或羟基。