Phase difference film

Patent metadata

Field	Value
Publication number	US-10899882-B2
Application number	US-201916718598-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Jun 28, 2017
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

An object of the present invention is to provide a phase difference film that can exhibit sufficient reciprocal wavelength dispersibility. The present invention includes a copolymer containing at least one selected from a unit represented by Formula (1) and a unit represented by Formula (2), and a unit represented by Formula (3), in which 20 nm<Re (548)<300 nm, 0.5<Re (446)/Re (548)<1.0, and 1.0<Re (629)/Re (548)<2.0. Here, Re (446), Re (548), and Re (629) represent in-plane retardations at wavelengths of 446 nm, 548 nm, and 629 nm, respectively.

First claim

What is claimed is:

1. A phase difference film comprising: a copolymer containing at least one selected from a nit represented by Formula (1) and a unit represented by Formula (2), and a unit represented by Formula (3),
wherein 20 nm<Re (548)<300 nm,
0.5<Re (446)/Re (548)<1.0, and
1.0<Re (629)/Re (548)<2.0;
where, Re (446), Re (548), and Re (629) represent in-plane retardation at respective wavelengths of 446 nm, 548 nm, and 629 nm;

in Formula (1), R 11 to R 14 each independently represent a hydrogen atom or a substituent having a Hammett substituent constant σ p value of less than −0.15, except for an aryl group, a heteroaryl group, and a substituent having a reactive group, and in R 11 to R 14 , substituents adjacent to each other are not bonded to each other to form a fused ring;
R 15 to R 17 each independently represent a substituent;
a to c each independently represent an integer of 0 or more and represent an integer of equal to or less than the maximum number of substitution on each ring; in a case where a to c each are an integer of 2 or more, a plurality of R 15 's, a plurality of R 16 's, and a plurality of R 17 's may be identical to or different from each other;
Ar 11 and Ar 12 each independently represent an aryl group including a benzene ring surrounded by a broken line or a heteroaryl group including a benzene ring surrounded by a broken line;
L 11 and L 12 each independently represent an alkylene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 12 carbon atoms, an arylene group having 6 to 20 carbon atoms; or a heteroarylene group having 6 to 20 carbon atoms;
n11 and n12 each independently represent an integer of 0 to 10; in a case where n11 and n12 are an integer of 2 to 10, a plurality of L 11 's and a plurality of L 12 's may be identical to or different: from each other;
in a case where Ar 11 and Ar 12 each independently represent an aromatic fused ring group including a benzene ring surrounded by a broken line, R 15 , R 16 , —O—[L 11 -O] n11 -, and [O-L 12 ]n 12 —O— each independently may be substituted at the benzene ring surrounded by a broken line and may be substituted at a ring included in a fused ring other than the benzene ring surrounded by a broken line;

in Formula (2), Y 21 and Y 22 each independently represent a carbon atom, an oxygen atom, a sulfur atom, or a nitrogen atom, and at least one Y 21 or Y 22 is an oxygen atom, a sulfur atom, or a nitrogen atom;
Z is an atomic group that forms a 5-membered to 7-membered ring with Y 21 —C═C—Y 22 , in which ring-constituting atoms of the atomic group includes a carbon atom, an oxygen atom, a sulfur atom, or a nitrogen atom;
R 21 to R 24 each independently represent a substituent;
p to s each independently represent an integer of 0 or more and represent an integer of equal to or less than the maximum number of substitution on each ring; in a case where p to s each are an integer of 2 or more, a plurality of R 21 's, a plurality of R 22 's, a plurality of R 23 's, and a plurality of R 24 's may be identical to or different from each other;
Ar 21 and Ar 22 each independently represent an aryl group including a benzene ring surrounded by a broken line or a heteroaryl group including a benzene ring surrounded by a broken line;
X 21 and X 22 each independently is a group selected from a single bond, —O—, and —S—;
L 21 and L 22 each independently represent an alkylene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 12 carbon atoms, an arylene group having 6 to 20 carbon atoms, or a heteroarylene group having 6 to 20 carbon atoms;
m21 and m22 each independently represent an integer of 0 to 0.10; in a case where m21 and m22 each are an integer of 2 to 10, a plurality of -[L 21 -X 21 ]-'s and a plurality of —[X 22 -L 22 ]-'s may be identical to or different from each other;
in a case where Ar 21 and Ar 22 are each independently an aromatic fused ring group including a benzene ring surrounded by a broken line, R 21 , R 22 , —O-[L 21 -x 21 ] m2 —, and —[X 22 -L 22 ] m22 -O— may be each independently substituted at the benzene ring surrounded by a broken line or may be substituted at a ring included in a fused ring other than the benzene ring surrounded by a broken line; and

in Formula (3), X 32 represents an alkylene group having 2 to 20 carbon atoms, a cycloalkylene group having 4 to 20 carbon atoms, an arylene group having 6 to 20 carbon atoms, or a group obtained by a combination thereof; where, ring-constituting atoms of the cycloalkylene group may be substituted with an oxygen atom, a sulfur atom, or a nitrogen atom.

2. The phase difference film according to claim 1 , wherein the unit represented by Formula (1) is a unit represented by Formula (11);

in Formula (11), R 11 to R 14 each independently represent a hydrogen atom or a substituent having a Hammett substituent constant σ p value of less than −0.15, except for an aryl group, a heteroaryl group, and a substituent having a reactive group, and in R 11 to R 14 , substituents adjacent to each other are not bonded to each other to form a fused ring;
R 15 and R 16 each independently represent a methyl group or an ethyl group;
a and b each independently represent an integer of 0 to 2;
L 11 and L 12 each independently represent an ethylene group or a propylene group; and
n11 and n12 each independently represent an integer of 0 to 3.

3. The phase difference film according to claim 1 , wherein the unit represented by Formula (2) is a unit represented by Formula (21);

in Formula (21), Y 21 and Y 22 each independently represent a carbon atom or a nitrogen atom, and at least one of Y 21 and Y 22 is a nitrogen atom;
R 21 and R 22 each independently represent a methyl group or an ethyl group, and R 23 and R 24 each independently represent a substituent;
p and q each independently represent an integer of 0 to 3, r represents an integer of 0 to 4, s represents an integer of 0 to 2, and in a case where s is 2, the substituent represented by R 24 may be bonded to each other to form a fused ring;
L 21 and L 22 each independently represent an ethylene group or a propylene group; and
m21 and m22 each independently represent an integer of 0 to 3.

4. The phase difference film according to claim 3 , wherein in Formula (21), Y 21 and Y 22 are nitrogen atoms.

5. The phase difference film according to claim 1 , wherein, in Formula (3), X 32 represents an alkylene group having 5 to 20 carbon atoms having at least one selected from an alicyclic ring, a heterocyclic ring, and an aromatic ring as a substituent, a cycloalkylene group having 4 to 20 carbon atoms, an arylene group having 6 to 20 carbon atoms, or a group obtained by a combination thereof, where ring-constituting atoms of the cycloalkylene group may be substituted with an oxygen atom, a sulfur atom, or a nitrogen atom.

6. The phase difference film according to claim 1 , wherein the unit represented by Formula (3) is a unit selected by the following constitutional units;

Assignees

• Fujifilm Corp

Inventors

• Uehira Shigeki
• Morooka Naoyuki
• Nakayama Takafumi

Classifications

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title

• C08J2367/00

  Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers · CPC title

• C08G63/66

  Polyesters containing oxygen in the form of ether groups (C08G63/42, C08G63/58 take precedence) · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title