Dichroic dye composition, light absorption anisotropic film, and polarizing element
AssigneeFUJIFILM Corporation
InventorsNobutaka Iwahashi, Masashi Ogiyama, Shinichi Morishima
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Abstract
A light absorption anisotropic film, having at least one dichroic dye, in which the light absorption anisotropic film shows a diffraction peak derived from a periodic structure in a direction in a plane of the light absorption anisotropic film in X-ray diffraction measurement and the diffraction peak has a half width of 1.0 Å or less.
Claims10
A light absorption anisotropic film formed from dichroic dye composition containing, based on total solids and excluding a solvent, 20 mass % or more of at least one azo dye,
- wherein the light absorption anisotropic film shows a diffraction peak derived from a periodic structure in a direction in a plane of the light absorption anisotropic film in X-ray diffraction measurement and the diffraction peak has a half width of 1.0 Å or less,
- wherein the at least one azo dye is represented by formula (Ib) or (Ic):
- wherein R10 and R11 each independently represents a hydrogen atom, a methyl group, or an ethyl group;
- L1b represents —N═N— or —C(═O)O—;
- L2b represents —CH═N—, —N═CH—, —C(═O)O—, or —OC(═O)—;
- A1b represents a group represented by formula (IIa) or (IIIa);
- and m1 and n1 each independently represents an integer of 0 to 2;
- wherein R9 represents an alkyl group which may have a substituent, an aryl group which may have a substituent, an alkoxy group which may have a substituent, an oxycarbonyl group which may have a substituent, or an acyloxy group which may have a substituent;
- wherein R12 and R13 each independently represents a hydrogen atom, a methyl group, or an ethyl group;
- and A1c represents a group represented by formula (IIa) or (IIIa);
- and
- wherein R9 represents an alkyl group which may have a substituent, an aryl group which may have a substituent, an alkoxy group which may have a substituent, an oxycarbonyl group which may have a substituent, or an acyloxy group which may have a substituent.
A light absorption anisotropic film, comprising at least one dichroic dye represented by formula (I), wherein the light absorption anisotropic film shows a diffraction peak derived from a periodic structure in a direction in a plane of the light absorption anisotropic film in X-ray diffraction measurement and the diffraction peak has a half width of 1.0 Å or less,
- wherein R1 to R4 each independently represents a hydrogen atom or a substituent;
- R5 and R6 each independently represents a hydrogen atom or an alkyl group which may have a substituent;
- L1 represents —CH═N—, —N═CH—, —C(═O)O—, —OC(═O)—, or —CH═CH—;
- A1 represents a phenyl group which may have a substituent, a naphthyl group which may have a substituent, or an aromatic heterocyclic group which may have a substituent;
- B1 represents a divalent aromatic hydrocarbon group which may have a substituent;
- n represents an integer of 1 to 5;
- and when n is 2 or more, B1's may be the same as or different from each other.
Dependencies are inferred from the claim text.