Composition for polarization film, polarization film, and display device

Patent metadata

Field	Value
Publication number	US-9798057-B2
Application number	US-201414244145-A
Country	US
Kind code	B2
Filing date	Apr 3, 2014
Priority date	May 14, 2013
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A composition for a polarization film including: a transparent resin having a boiling point of greater than or equal to 130° C.; and a dichroic dye represented by Chemical Formula 1,

First claim

What is claimed is:

1. A composition for a polarization film comprising:
a transparent resin having a boiling point of greater than or equal to 130° C.; and
a dichroic dye represented by Chemical Formula 1, wherein a solubility parameter of the dichroic dye is less than or equal to about 24,
wherein a difference between a solubility parameter of the transparent resin and a solubility parameter of the dichroic dye is less than or equal to about 7.4, and
the composition has a solid content of greater than or equal to about 90 weight percent:

wherein, in Chemical Formula 1,
Ar 1 to Ar 3 are each independently a substituted or unsubstituted C6 to C15 arylene group,
R 1 to R 4 are each independently hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 alkylthio group, a substituted or unsubstituted C1 to C30 alkanoyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof,
at least one of R 1 to R 4 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 alkylthio group, a substituted or unsubstituted C1 to C30 alkanoyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof,
R 5 and R 6 are each independently hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, or are linked to each other to form a ring, and
n is an integer ranging from 0 to 2.

2. The composition for a polarization film of claim 1 , wherein the transparent resin comprises a polyolefin, a polyester, or a combination thereof.

3. The composition for a polarization film of claim 2 , wherein the transparent resin comprises a polyolefin, and
the polyolefin comprises polyethylene, polypropylene, a copolymer thereof, or a combination thereof.

4. The composition for a polarization film of claim 3 , wherein a solubility parameter of the polyolefin is about 15 to about 18.

5. The composition for a polarization film of claim 3 , wherein the polyolefin is a combination of polypropylene and a polyethylene-polypropylene copolymer, and
the polyethylene-polypropylene copolymer has an ethylene content of about 1 to about 50 weight percent.

6. The composition for a polarization film of claim 2 , wherein the transparent resin comprises a polyester, and
the polyester comprises polyethylene terephthalate, polyethylene naphthalate, modified polyethylene terephthalate glycol, a copolymer thereof, or a combination thereof.

7. The composition for a polarization film of claim 6 , wherein a solubility parameter of the polyester is about 15 to about 21.

8. The composition for a polarization film of claim 1 , wherein the composition does not include a solvent.

9. A polarization film comprising:
a transparent resin having a boiling point of greater than or equal to 130° C., and
a dichroic dye represented by Chemical Formula 1, wherein a solubility parameter of the dichroic dye is less than or equal to about 24,
wherein a difference between a solubility parameter of the transparent resin and a solubility parameter of the dichroic dye is less than or equal to about 7.4, and
the polarization film comprises a melt-blend of the transparent resin and the dichroic dye, the melt-blend being a product obtained by melt-blending a composition of the transparent resin and the dichroic dye:

wherein, in Chemical Formula 1,
Ar 1 to Ar 3 are each independently a substituted or unsubstituted C6 to C15 arylene group,
R 1 to R 4 are each independently hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 alkylthio group, a substituted or unsubstituted C1 to C30 alkanoyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof,
at least one of R 1 to R 4 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 alkylthio group, a substituted or unsubstituted C1 to C30 alkanoyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof,
R 5 and R 6 are each independently hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, or are linked to each other to form a ring, and
n is an integer ranging from 0 to 2.

10. The polarization film of claim 9 , wherein the transparent resin comprises a polyolefin, a polyester, or a combination thereof.

11. The polarization film of claim 10 , wherein the transparent resin comprises a polyolefin, and
the polyolefin comprises polyethylene, polypropylene, a copolymer thereof, or a combination thereof.

12. The polarization film of claim 11 , wherein a solubility parameter of the polyolefin is about 15 to about 18.

13. The polarization film of claim 10 , wherein the transparent resin comprises a polyester, and
the polyester comprises polyethylene terephthalate, polyethylene naphthalate, modified polyethylene terephthalate glycol, a copolymer thereof, or a combination thereof.

14. The polarization film of claim 13 , wherein a solubility parameter of the polyester is about 15 to about 21.

15. The polarization film of claim 9 , wherein the polarization film has a dichroic ratio of about 3 to about 10 at a maximum absorption wavelength in a visible wavelength region,
wherein the dichroic ratio is represented by Equation 1:
DR=Log(1/ T ⊥ )/Log(1/ T // )  Equation 1

wherein, in Equation 1,
DR denotes a dichroic ratio of a polarization film,
T // is a transmittance of the polarization film for light parallel to a transmissive axis of the polarization film, and T ⊥ is a transmittance of the polarization film for light perpendicular to the transmissive axis of the polarization film.

16. A display device comprising the polarization film according to claim 9 .

Assignees

• Samsung Electronics Co Ltd
• Kyungpook Nat Univ Industry-Academic Coop Found

Inventors

• Lee Yong Joo
• Moon Deuk Kyu
• Park Sang Ho
• Choi Jae Hong
• Kim Beom Seok
• Won Jong Hoon
• Fang Feifei
• Jung Myung Sup

Classifications

• C09K2219/03

  in the form of films, e.g. films after polymerisation of LC precursor · CPC title

• C09K19/601

  Azoic · CPC title

• G02B5/3033 Primary

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title

• C08L23/02 Primary

  not modified by chemical after-treatment · CPC title

• G02B5/30

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