Patent ID: 9382481
Filing Date: 2016-07-05
CPC Classification: B05D,C09B,C09K,G02B,G02F

Claim Text:
1. A polarizing film comprising a substrate, and an optical alignment film and an optical absorption anisotropic film laminated on the substrate in this order, wherein the optical absorption anisotropic film has a content ratio of 30% by mass or less of a liquid crystalline non-colorable low molecular weight compound and is obtained by fixing the alignment of a dichroic dye composition comprising two or more nematic liquid crystalline dichroic dyes, wherein the dichroic dyes have a molecular length of 17 Å or more and an aspect ratio of 1.7 or more; in X-ray diffraction measurement thereof, diffraction peaks derived from periodic structure along a vertical direction to the alignment axis are present, the period indicated by at least one of the diffraction peaks is 3.0 to 15.0 Å and an intensity of the diffraction peak does not show a maximum value in the range of ±70° of the film normal line direction in a plane vertical to the alignment axis; and wherein said dichroic dye composition comprises two or more dichroic dyes which are selected from dichroic dyes represented by the following formula (II), the following formula (III), the following formula (IV) or the following formula (VI): wherein, R 21 and R 22 each represent a hydrogen atom, an alkyl group, an alkoxy group or a substituent represented by -L 22 -Y, provided that, at least one of them represents a group other than a hydrogen atom; L 22 represents an alkylene group, and one CH 2 group or non-adjacent two or more CH 2 groups present in the alkylene group may each be substituted with —O—, —COO—, —OCO—, —OCOO—, —NRCOO—, —OCONR—, —CO—, —S—, —SO 2 —, —NR—, —NRSO 2 — or —SO 2 NR— and R represents a hydrogen atom or an alkyl group having 1 to 4 carbons; Y represents a hydrogen atom, a hydroxy group, an alkoxy group, a carboxyl group, a halogen atom or a polymerizable group; L 21 s each represent a linking group selected from the group consisting of an azo group (—N═N—), a carbonyloxy group (—C(═O)O—), an oxycarbonyl group (—O—C(═O)—), an imino group (—N═CH—) and a vinylene group (—C═C—); Dye each represents an azo dye residue represented by the following formula (IIa); in the formula (IIa), * represents a linkage part to L wherein, R 31 to R 35 each represent independently a hydrogen atom or a substituent; R 36 and R 37 each represent independently a hydrogen atom or an alkyl group optionally having a substituent; Q 31 represents an aromatic hydrocarbon group optionally having a substituent, aromatic heterocyclic group optionally having a substituent or cyclohexane ring group optionally having a substituent; L 31 represents a divalent linking group; A 31 represents an oxygen atom or a sulfur atom; wherein, R wherein, A