| 摘要 |
<p>PURPOSE:To easily obtain a liquid crystal display element reduced in weight and thickness by using a specified aromatic polyetheramideimide polymer for an orientation control film material and making it possible to obtain said film at low temp. and in a short time. CONSTITUTION:A material to be used as an orientation control film is an aromatic polyetheramideimide polymer having repeating units of formulae I and IIin which R1-R4 and R'1-R'4 are each H, lower alkyl, lower alkoxy, C, or Br; R5, R6 and R'5, R'6 are each H, methyl, ethyl, propyl, CF3, or CCl3; and Ar is p- phenylene, m-phenylene, diphenylene, diphenylene ether, or naphtylene. The orientation control film is obtained at low temp. and in a short time only by evaporating and drying a solvent after coating a substrate with a soln. of this polymer, thus permitting extremely easy and inexpensive fabrication of a liquid crystal display element, as compared with the conventional processes.</p> |
