LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT HAVING THE SAME
申请人:CHI MEI CORPORATION
公开号:US20170029703A1
公开(公告)日:2017-02-02
The present invention relates to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element. The liquid crystal alignment agent includes a polymer composition (A) synthesized by tetracarboxylic dianhydride compound (a) and diamine compound (b), and a solvent (B). The diamine compound (b) includes diamine (b-1) shown as following formula (I) and diamine (b-2):
in formula (I), R
1
represents a linear or branched alkyl of 1 to 6 carbons, a linear or branched hydroxyl alkyl of 1 to 6 carbons, an alkoxy of 1 to 6 carbons, an alkylthio of 1 to 6 carbons, a halogen atom, an amino group or a nitro group; R
2
represents a methylene group, a divalent alkyl of 2 to 10 carbons, a divalent alkenyl of 2 to 7 carbons or a divalent alkynyl of 2 to 6 carbons; and a represents an integer of 0 to 3.