Liquid crystal alignment agent, liquid crystal alignment film, and liquid crystal element

Abstract

To provide a liquid crystal aligning agent capable of obtaining a liquid crystal alignment film showing good liquid crystal alignment properties and having high film strength, and also capable of obtaining a liquid crystal element having excellent electrical characteristics. 【Solution means】The liquid crystal aligning agent contains a polymer (P) containing a structural unit (U1), a structural unit (U2), and a structural unit (U3) in the same molecule. Structural unit (U1): A structural unit derived from a diamine having a partial structure represented by formula (1). Structural unit (U2): A structural unit derived from a diamine having a partial structure Y (-(CH2) n - etc.) (excluding the structural unit (U1) and the structural unit (U3)). Structural unit (U3): A structural unit derived from a diamine having a partial structure represented by formula (2). In formula (1), A 1 and A 2 are trivalent aromatic ring groups. B 1 is -NR 1 - etc. In formula (2), X 1 is a monovalent thermally detachable group. R 4 is "-C(R 7 )(R 8 )-" etc. R 5 is "-C(R 7 )(R 8 )-" etc. TIFF2026116136000029.tif31169

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