Patent ID: 9207362
Filing Date: 2015-12-08
Classification: B29C,C08G,C08J,C08L,G02B,G02F,Y10T

Abstract:
1. An optically anisotropic article comprising one type or two or more types of a copolymer, or a mixture that includes one type or two or more types of the copolymer, and an additional polymer, the copolymer comprising a repeating unit (I) represented by a formula (I) and a repeating unit (II) represented by a formula (II) in its molecule, the content of the repeating unit (I) in the copolymer being 5 to 90 mol % based on the total repeating units, the content of the repeating unit (II) in the copolymer being 10 to 95 mol % based on the total repeating units, and a 0.5 g/dl methylene chloride solution of the copolymer having a reduced viscosity (ηsp/c) at 20° C. of 0.3 to 2.0 dl/g, wherein Y 1 is a chemical single bond, —C(═O)—, or —O—C(═O)—, A 1 is a substituted or unsubstituted trivalent aromatic group, A x is an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and a heteroaromatic ring, A y is a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and a heteroaromatic ring, provided that the aromatic ring included in A′ and the aromatic ring optionally included in A y are either substituted or unsubstituted, and A x and A y are optionally bonded to each other to form a ring, and Q 1 is a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, wherein Y 2 is a chemical single bond, —C(═O)—, or —O—C(═O)—, and A 2 is a substituted or unsubstituted naphthalenediyl group, or a group represented by a formula (III): wherein R 1 to R 8 are independently a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 6 carbon atoms, and T is a group among groups respectively represented by formulas (T-1) to (T-3): wherein R 9 and R 10 are independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a haloalkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms.