Patent ID: 6858269
Filing Date: 2005-02-22
Classification: C08G,C09K,G02F

Abstract:
1. A photo-alignment material comprising a repeating unit represented by the following formula 1, or a repeating unit represented by the following formula 1 and at least one repeating unit selected from the group consisting of structures represented by the following formula 2, wherein the photo-alignment material comprises at least one repeating unit having a photo-reactive group selected from the group consisting of functional groups represented by the following formula 5, and the mole ratio of repeating units having at least one photo-reactive group selected from the group consisting of functional groups represented by the following formula 5 to repeating units not having a photo-reactive group is from about 2:8 to about 9:1: in which X is a hydrogen atom, fluorine atom, chlorine atom, or C 1˜14 linear or branched alkyl group; Y is an oxygen atom or C 2˜14 alkylene group; and R is a functional group having a structure represented by the following formula 3: in which R 1 is selected from the group consisting of functional groups represented by the following formula 4; R 2 is selected from the group consisting of functional groups represented by the following formulas 5 and 6; R 3 is selected from the group consisting of functional groups represented by the following formula 7; k is an integer of from 0 to 3; 1 is an integer of from 0 to 5; and if there exist a plurality of R 1 or R 2 , each R 1 or R 2 may be same or different: in which n is an integer of from 0 to 10, in which X in the functional groups represented by formula (7) is a hydrogen atom, fluorine atom, chlorine atom, C 1˜13 alkyl or alkoxy group, or —(OCH 2 ) p CH 3 in which p is an integer of from 0 to 12, and mis an integer of from 0 to 18.