Patent ID: 9678384
Date: 2017-06-13
CPC Classifications: C09D,C09K,G02B,G02F

Claim:
1. A retardation film formed from a composition which comprises: a polymer compound, wherein the polymer compound is represented by Formula IX or Formula XI: in the formula, R in the formula, each * represents a bonding site with L or R in the formula XI, R a rod-like liquid crystal compound, wherein said rod-like liquid crystal compound is composed having a structure represented by Formula (I): wherein n is an integer of 0 to 3, which denotes the number of repetition of (Y1-L-Y2-M each of Q1 and Q2 represents a polymerizable group, and each of the polymerizable groups Q1 and Q2 is preferably one of an acryloyl group, methacryloyl group, radical polymerizable group or ring-opened polymerizable group, each of SP1 and SP2 represents one of a straight-chain or branched alkylene group, or a group composed of a straight-chain or branched alkylene group combined with at least one of —O— and —C(═O)—, having a total number of carbon atoms of 2 to 8 in integer; each of X1 and X2 represents a single bond or oxygen atom; —Y1-L-Y2- represents one of a straight-chain alkylene group, or a group composed of straight-chain alkylene group and —O— and/or —C(═O)—, having a total number of carbon atoms of 3 to 18 in integer; and each of M M M each of Ar1, Ar2 and Ar3 independently represents phenylene or biphenylene substituted by an arbitrary number of bromine atom(s), methyl group(s), or methoxy group(s), and a photo-reactive compound, wherein the polymer compound has a side chain which has one or more azo groups and/or cynnamate groups, and 3 or more and 10 or less arylene groups; the side chain further has an optionally substituted amino group, or a hydrocarbon group at the terminal; an absolute value of difference between an SP value of the polymer compound and an SP value of the photo-reactive compound is 1.1 or less; and an in-plane retardation of the film at wavelength of 550 nm is 10 nm or more and 200 nm or less.