COMPOSITION FOR POLARIZING FILM, POLARIZING FILM, AND DISPLAY DEVICE INCLUDING THE POLARIZING FILM

• US 20130303677A1
• Filed: 05/08/2013
• Published: 11/14/2013
• Est. Priority Date: 05/08/2012
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Myung-Man, WON, Jong-Hoon, JUNG, Myung-Sup, LEE, Yong Joo, MOON, Deuk Kyu
• Application Number:
  US13/889,653
• Publication Number:
  US 20130303677A1
• Time in Patent Office: Days
• US Class Current: 524/508
• CPC Class Codes: G02B 1/08 made of polarising materials
• CPC Class Codes: G02B 5/3016 involving passive liquid crystal elements optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528
• CPC Class Codes: G02B 5/305 including organic materials, e.g. polymeric layers

Abstract

A composition for a polarizing film including a polymer, a dichroic dye, and a liquid crystal oligomer, wherein the liquid crystal oligomer includes a mesogen unit and a kink-forming arylene unit, a polarizing film including the composition, and a display device including the polarizing film.

Claims

1. A composition for a polarizing film, comprising:

a polymer;

a dichroic dye; and

a liquid crystal oligomer,

wherein the liquid crystal oligomer comprises a mesogen unit and a kink-forming arylene unit.

2. The composition of claim 1, wherein the liquid crystal oligomer is represented by Chemical Formula 1:

T₁-L₁-(Ar₁)_n-L₂-(Ar₂)_m-L₃-T₂ 

 

Chemical Formula 1

wherein, in Chemical Formula 1,

Ar₁ is the kink-forming arylene unit,

Ar₂ is the mesogen unit,

L₁, L₂, and L₃ are the same or different, and are each a linking group,

T₁ and T₂ are each independently a C1 to C20 aromatic or aliphatic group without a hydrophilic functional group, and

n and m are mole ratios wherein 0.05≦

n≦

0.6 and 0.4≦

m≦

0.95.

3. The composition of claim 2, wherein Ar₁ of the Chemical Formula 1 is represented by Chemical Formula 2:

—

[X₁-A₁-Y₁]—

 

 

Chemical Formula 2

wherein, in Chemical Formula 2,

A₁ is an arylene group having a kink structure,

X₁ and Y₁ are each independently —

C(═

O)O—

, —

OC(═

O)—

, —

C(═

O)—

, —

O—

, —

C(═

N)(R^a)—

, —

C(═

O)N(R^b)—

, —

N(R^c)—

, —

N(R^d)C(═

O)—

, —

C(═

O)N(R^e)—

, or a combination thereof, wherein R^a to R^e are each independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a combination thereof.

4. The composition of claim 3, wherein A₁ of the Chemical Formula 2 comprises at least one selected from Groups 1-1 to 1-6:

Group 1-1

5. The composition of claim 2, wherein Ar₂ of the Chemical Formula 1 is represented by Chemical Formula 3:

—

[X₂-A₂-Y₂]—

 

 

Chemical Formula 3

wherein, in Chemical Formula 3,

A₂ is a group including a substituted or unsubstituted C3 to C30 cycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heterocycloalkylene group, a substituted or unsubstituted C3 to C30 heteroarylene group, or a combination thereof, and

X₂ and Y₂ are each independently —

O—

, —

C(═

O)—

, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C1 to C30 oxyalkylene group, or a combination thereof.

6. The composition of claim 5, wherein A₂ of the Chemical Formula 3 may include at least one selected from Group 2:

Group 2

7. The composition of claim 5, wherein A₂ of the Chemical Formula 1 is represented by Chemical Formula 3a:

—

[X₂₁-A₂₁-Y₂₁]_k1—

[X₂₂-A₂₂-Y₂₂]_k2—

[X₂₃-A₂₃-Y₂₃]_k3—

[X₂₄-A₂₄-Y₂₄]_k4—

 

 

Chemical Formula 3a

wherein, in Chemical Formula 3a,

A₂₁, A₂₂, A₂₃, and A₂₄ are each independently a substituted or unsubstituted C3 to C30 cycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heterocycloalkylene group, a substituted or unsubstituted C3 to C30 heteroarylene group, or a combination thereof,

X₂₁, X₂₂, X₂₃, X₂₄, Y₂₁, Y₂₂, Y₂₃, and Y₂₄ are each independently —

O—

, —

C(═

O)—

, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C1 to C20 oxyalkylene group, or a combination thereof,

k₁ to k₄ are each independently 0 to 50, and

at least one of k₁ to k₄ is not 0.

8. The composition of claim 2, wherein T₁ and T₂ of the Chemical Formula 1 are each independently at least one of Chemical Formulae 4-1 to 4-12:

9. The composition of claim 1, wherein the liquid crystal oligomer has a melting point of less than or equal to about 250°

C.

10. The composition of claim 1, wherein the liquid crystal oligomer has a solubility parameter of about 15 to about 30.

11. The composition of claim 1, wherein the polymer comprises at least one of polyolefin, polyethylene terephthalate, glycol modified polyethylene terephthalate, polyester, nylon, copolymers thereof.

12. The composition of claim 1, wherein a solubility parameter difference between the polymer and the dichroic dye is less than 7.4,

13. The composition of claim 1, wherein the polymer is a polyolefin, and the dichroic dye is represented by the Chemical Formula 1

14. The composition of claim 1, wherein R^a is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 thioalkyl group, a substituted or unsubstituted C3 to C30 ketone group, a substituted or unsubstituted C1 to C30 oxycarbonyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof, and

R^b is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 thioalkyl group, —

NR^cR^d, or a combination thereof, wherein R^c and R^d are each independently hydrogen, a substituted or unsubstituted C1 to C10 alkyl group or are linked to each other to form a ring.

15. The composition of claim 1, wherein when each of o and p is 1,

R^a is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 thioalkyl group, a substituted or unsubstituted C3 to C30 ketone group, a substituted or unsubstituted C1 to C30 oxycarbonyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof, and

R^b is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C20 aryl group, —

NR^cR^d, or a combination thereof, wherein R^c and R^d are each independently hydrogen, a substituted or unsubstituted C1 to C10 alkyl group, or are linked to each other to form a ring.

16. The composition of claim 1, wherein when each of o and p is 0,

R^a is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 thioalkyl group, a substituted or unsubstituted C3 to C30 ketone group, a substituted or unsubstituted C1 to C30 oxycarbonyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof, and

R^b is a substituted or unsubstituted C1 to C30 alkyl group, —

NR^cR^d, or a combination thereof, wherein R^c and R^d are each independently hydrogen, a substituted or unsubstituted C1 to C10 alkyl group, or are linked to each other to form a ring.

17. The composition of claim 1, wherein when o is 1 and p is 0,

R^a is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 thioalkyl group, a substituted or unsubstituted C3 to C30 ketone group, a substituted or unsubstituted C1 to C30 oxycarbonyl group, a substituted or unsubstituted C2 to C20 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, or a combination thereof, and

R^b is a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, —

NR^cR^d, or a combination thereof, wherein R^c and R^d are each independently hydrogen, a substituted or unsubstituted C1 to C10 alkyl group, or are linked to each other to form a ring.

18. The composition of claim 1, wherein an amount of the liquid crystal oligomer and the dichroic dye are about 0.01 to 10 parts by weight and 0.05 to about 5 parts by weight based on a total of 100 parts by weight of the polymer, respectively.

19. A uniaxially elongated polarizing film comprising the composition for a polarizing film according to claim 1.

20. A display device comprising the polarizing film according to claim 19.