Patent ID: 6569972
Filing Date: 2003-05-27
Classification: C07D,C09K

Abstract:
A photo-alignment material comprising 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 8, wherein at least 20% by mole of the repeating units contain at least one photo-reactive functional group selected from the group consisting of structures represented by the following formula 5: in which X is a hydrogen atom, fluorine atom, chlorine atom, or C1Ëœ14 linear or branched alkyl group; Y is an oxygen atom or C2Ëœ14 alkylene group; and R is a functional group having a structure represented by the following formula 3:&Parenopenst;R1&Parenclosest;k&Parenopenst;R2&Parenclosest;I&Parenopenst;R3)â€ƒâ€ƒ(3) in which R1 is selected from the group consisting of functional groups represented by the following formula 4; R2 is selected from the group consisting of functional groups represented by the following formulas 5 and 6; R3 is selected from the group consisting of functional groups represented by the following formula 7; k is an integer of from 0 to 3; I is an integer of from 0 to 5; and if there exist a plurality of R1 or R2, each R1 or R2 may be same or different: in which n is an integer of from 0 to 10, in which X in the groups represented by formula (7) is a hydrogen atom, fluorine atom, chlorine atom, C1Ëœ13 alkyl or alkoxy group, or â€”(OCH2)pCH3 in which p is an integer of from 0 to 12, and m is an integer of from 0 to 18; in which n is an integer of from 1 to 12.