Liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element containing a polymer having a portion having an isocyanate group and / or a blocked isocyanate group and a photoreactive portion and a crosslinking agent

摘要

The present invention provides a liquid crystal display element that can be fired at a low temperature when forming a liquid crystal alignment film capable of imparting alignment regulating ability and pretilt angle expression by a photo-alignment method. In addition, the present invention provides a liquid crystal display element in which the pretilt angle of the liquid crystal is high and display burn-in hardly occurs even after long-term use. In addition, the present invention provides a vertical liquid crystal alignment film used for the liquid crystal display element and a liquid crystal alignment agent that can provide the vertical liquid crystal alignment film. The present invention provides a polymer having (A) component: (A-1) a site having an isocyanate group and / or a blocked isocyanate group; and (A-2) a site having photo-alignment property; (B) Provided is a liquid crystal aligning agent comprising: a component: a compound having two or more functional groups selected from the group consisting of an amino group and a hydroxyl group in the molecule; and an organic solvent. [Selection figure] None