Patent ID: 6733958
Filing Date: 2004-05-11
Classification: C07D,C09K,G02F

Abstract:
A material for a photo-alignment layer the material comprising a polymerizable monomer, the polymerizable monomer having at least one photo-alignment moiety which causes photo-alignment by a photo dimerization reaction, and having at least two polymerizable maleimide groups in a polymerizable monomer, the polymerizable monomer represented by the general formula: wherein:R1 represents: an alkylene group having 1 to 30 carbon atoms, a cycloalkylene group having 3 to 12 carbon atoms, or 2 to 5 molecular groups selected from the group of alkylene groups having 1 to 30 carbon atoms and cycloalkylene groups having 3 to 12 carbon atoms, the 2 to 5 molecular groups joined via a single bond, an ester bond, an ether bond or a urethane bond;R2 represents a photo-alignment moiety selected from the group consisting of a benzophenone group, cinnamoyl group, chalcone groups and coumarin group; R3 and R4 each independently represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a phenyl group, or a halogen atom; and n represents an integer of 2 to 4.