Cured film formation composition, orientation material, and retardation material

A retardation material, the retardation material being formed by applying and orienting a polymerizable liquid crystal solution on an orientation material, and curing the polymerizable liquid crystal solution in the oriented state to form the retardation material;

• wherein the orientation material is a cured product of a cured-film formation composition, the cured-film formation composition comprising:
• a component (A) that is a compound obtained by reacting a cinnamic acid compound of Formula (1) below with a compound having a molecular weight of 100 to 5,000 g/mol and having at least one epoxy group in one molecule,
• wherein R1, R2, R3, R4, and R5 are each independently a substituent selected from a hydrogen atom, a halogen atom, a C1-6 alkyl, a C1-6 haloalkyl, a C1-6 alkoxy, a C1-6 haloalkoxy, a C3-8 cycloalkyl, a C3-8 halocycloalkyl, a C2-6 alkenyl, a C2-6 haloalkenyl, a C3-8 cycloalkenyl, a C3-8 halocycloalkenyl, a C2-6 alkynyl, a C2-6 haloalkynyl, a (C1-6 alkyl) carbonyl, a (C1-6 haloalkyl) carbonyl, a (C1-6 alkoxy) carbonyl, a (C1-6 haloalkoxy) carbonyl, a (C1-6 alkylamino) carbonyl, a (C1-6 haloalkyl) aminocarbonyl, a di(C1-6 alkyl) aminocarbonyl, cyano, and nitro;
• a component (B) that is a cross-linking agent;
• a component (C) that is a polymer having a thermally cross-linkable group;
• and
• a component (D) that is a cross-linking catalyst.