LIQUID CRYSTAL ALIGNING AGENT FOR RETARDATION FILM, LIQUID CRYSTAL ALIGNMENT FILM FOR RETARDATION FILM, AND RETARDATION FILM AND PROCESS FOR PRODUCTION THEREOF

摘要

PURPOSE: A liquid crystal alignment agent for retardation film is provided to be photo-aligned by irradiation of a small amount of radiation, and not to need a heating process during irradiation and after irradiation. CONSTITUTION: A liquid crystal alignment agent for retardation film comprises polyorganosiloxane having Aphoto-alignment group. The manufacturing method of the retardation film comprises: a step of forming film by spreading the liquid crystal alignment material on a substrate; a step of obtaining liquid crystal alignment ability, and forming liquid crystal film for the retardation film by irradiation of a radiation on the film; a step of spreading polymerizable liquid crystal on the liquid crystal film for the retardation film; and a step of hardening the polymerizable liquid crystal-spread film.