| abstract |
It is a primary object of the present invention to provide a thermosetting composition having photo-alignment property with high sensitivity, and an alignment layer using the same, an alignment layer-equipped substrate, a retardation plate, and a device. The present invention achieves the above object by providing a thermosetting composition having photo-alignment property, which comprises a copolymer having a photo-orientable structural unit and a thermally cross-linkable structural unit represented by the following formula (1). Here, the formula (1), X is an optical alignment of generating the photo-isomerization reaction or the photo-dimerization-reactive groups, L 1 represents a single bond, -O-, -S-, -COO-, -COS- , -CO- , -OCO-, -OCO (CH 2 ) n COO-, -OCOCH 2 CH 2 OCH 2 CH 2 COO-, -OCOC 6 H 4 O-, -OCOC 6 H 10 O-, -COO (CH 2 ) n O-, -COOC 6 H 4 O-, -COOC 6 H 10 O-, -O (CH 2 ) n O-, -OC 6 H 4 O-, -OC 6 H 10 O- or - (CH 2 ) n O-, n is 1 to 4, R 1 is a hydrogen atom or a monovalent organic group, and k is 1 to 5. |