POLYMER COMPOSITION HAVING PHOTOALIGNABLE GROUP, LIQUID CRYSTAL ALIGNMENT LAYER FORMED OF THE POLYMER COMPOSITION, AND OPTICAL DEVICE INCLUDING RETARDATION PLATE FORMED OF THE LIQUID CRYSTAL ALIGNMENT LAYER

摘要

PROBLEM TO BE SOLVED: To provide a photoalignable material excellent in sensitivity and alignable even by short-time exposure, from which a photoalignable layer with high optical uniformity and no alignment defects can be produced, and to provide a liquid crystal alignment layer formed of the photoalignable material and exhibiting high alignment stability of a liquid crystal compound.SOLUTION: The photoalignable layer is produced by preparing a photoalignable polymer composition containing a specified photoalignable polymer and a specified polymer reactive with the photoalignable polymer, applying the polymer composition on a substrate or the like, drying and irradiating with light. A liquid crystal alignment layer is produced by aligning molecules of a liquid crystal compound to the photoalignable layer.