| 摘要 |
PURPOSE: Provided are a vanish for forming an alignment film for liquid crystals, which has good mechanical strength against the abrasion by rubbing, and excellent adhesion onto a glass substrate and storage stability, an alignment film formed by using the varnish and a liquid crystal display device comprising the alignment film. CONSTITUTION: The varnish for forming an alignment film comprises a polymer which is obtained by using silsesquioxane derivatives represented by the formula 1 and is comprised of a polymeric chain formed by at least any one of an amide bond and an imide bond. In the formula 1, R1 is a group independently selected from the group consisting of hydrogen, an alkyl, an aryl and an arylalkyl, each being capable of having a substituent, at least two of Y are groups selected from any group consisting of a group represented by the formula 2-1 and a group represented by the formula 2-2, and the remaining Y is hydrogen, in the formula 2-1 and 2-2, Z1 is a group having an amino group, Z2 is a group having a 2-oxapropanedioyl group and R2 is defined as in R1.
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