The present invention relates to a polymer blend of cinnamate polymer and
polyimide polymer, which are photo-reactive polymers, for preparing liquid
crystal alignment layer having a high pretilt angle in photo-alignment, a
process for preparing liquid crystal alignment layer by employing the said
blend, a liquid crystal alignment layer prepared by the process, and a
crystal cell prepared by employing the liquid crystal alignment layer. The
polymer blend for preparing liquid crystal alignment layer of the
invention comprises 10 to 90% (w/w) of cinnamate polymer and 10 to 90%
(w/w) of polyimide polymer. Since the liquid crystal alignment layer
prepared by employing the polymer blend of the invention has an excellent
alignment property and thermal stability, which makes possible its wide
application in the development of liquid crystal displays.
