LIQUID CRYSTAL ALIGNING AGENT AND LIQUID CRYSTAL DISPLAY ELEMENT USING SAME

摘要

Provided are: a liquid crystal aligning agent which is capable of forming a liquid crystal alignment film that is able to improve the response speed after UV irradiation without being decreased in vertical alignment ability; and a liquid crystal display element which comprises a liquid crystal alignment film obtained from the liquid crystal aligning agent and is processed similarly to PSA type liquid crystal display elements using liquid crystals to which a liquid crystal polymerizable compound is not added, said liquid crystal display element having improved response speed after UV irradiation. A liquid crystal aligning agent which contains: at least one kind of a polymer (component (A)) that is selected from the group consisting of polyamic acids and polyimides; and a polysiloxane (component (B)) that is obtained by polycondensing alkoxysilanes including an alkoxysilane represented by formula (1) and an alkoxysilane represented by formula (3). R1Si(OR2)3 (1) (In formula (1), R1 represents a group represented by formula (2); and R2 represents an alkyl group having 1-5 carbon atoms.) (In formula (2), Y1 represents a single bond or the like; Y2 represents a single bond or the like; Y3 represents a single bond or the like; Y4 represents a divalent cyclic group such as a benzene ring, or the like; Y5 represents a divalent cyclic group such as a benzene ring, or the like; Y6 represents an alkyl group having 1-18 carbon atoms, or the like; and n represents a number of 0-4.) R3Si(OR4)3 (3) (In formula (3), R3 represents an acryl group, an acryloxy group, a methacryl group, a methacryloxy group or an alkyl group having 1-30 carbon atoms and substituted by a styryl group; and R4 represents an alkyl group having 1-5 carbon atoms.)