Photocurable composition

Patent metadata

Field	Value
Publication number	US-11739168-B2
Application number	US-201816642530-A
Country	US
Kind code	B2
Filing date	Aug 31, 2018
Priority date	Sep 1, 2017
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

Conventionally, a photocurable composition to which an ultraviolet absorber is added is difficult to form a colorless and transparent cured resin because the ultraviolet absorber itself is colored, and thus the photocurable composition is hardly to be used in a display apparatus required for colorlessness and transparency. Provided is a photocurable composition including a specific compound, wherein a light transmittance of 385 nm is 50% or less and a yellowness index is 3.0 or less in a state in which a cured resin having a thickness of 200 μm or less is interposed between alkali free glass plates each having a thickness of 0.7 mm.

First claim

The invention claimed is:

1. A photocurable composition comprising a compound of the following General Formula 1 or 2-(2′-hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole as a component (A),
a (meth)acrylate compound as a component (B);
a film-forming resin as a component (C); and
a photoinitiator as a component (D),
wherein a light transmittance of 385 nm is 50% or less and a yellowness index is 3.0 or less in a state in which a cured resin of the photocurable composition with a thickness of 200 μm or less is interposed between alkali free glass plates each having a thickness of 0.7 mm:

n is an integer of 1 to 4, R is a hydrocarbon group having a total number of carbon atoms of 6 or more, and hydrogen in a main skeleton of the compound may be substituted with another organic group, where a multimer is excluded.

2. The photocurable composition according to claim 1 , wherein a light transmittance of 385 nm is 30% or less and a yellowness index is 3.0 or less in a state in which a cured resin of the photocurable composition with a thickness of 200 μm or less is interposed between alkali free glass plates each having a thickness of 0.7 mm.

3. The photocurable composition according to claim 1 , wherein the component (B) includes a (meth)acrylate oligomer and a (meth)acrylate monomer.

4. The photocurable composition according to claim 3 , wherein the (meth)acrylate oligomer is a urethane-modified (meth)acrylate oligomer.

5. The photocurable composition according to claim 4 , wherein a main skeleton of the urethane-modified (meth)acrylate oligomer is polycarbonate.

6. The photocurable composition according to claim 3 , wherein a main skeleton of the (meth)acrylate monomer is polyether.

7. The photocurable composition according to claim 1 , wherein the component (C) is a phenoxy resin.

8. The photocurable composition according to claim 1 , wherein the component (D) includes an acylphosphineoxide-based photoinitiator.

9. The photocurable composition according to claim 1 , wherein a content of the component (A) is 0.1 to 4.0% by mass with respect to a total composition excluding a solvent.

10. The photocurable composition according to claim 1 , wherein the photocurable composition is used in assembling an organic EL device.

11. A photocurable sheet comprising the photocurable composition set forth in claim 1 .

12. A display apparatus using the photocurable composition set forth in claim 1 .

13. An adhering method comprising:
a step of attaching the photocurable sheet set forth in claim 11 to one adherend and sticking another adherend to the photocurable sheet; and
a step of curing the photocurable sheet by irradiation with an energy ray to adhere the two adherends.

14. A method of producing a display apparatus comprising the adhering method set forth in claim 13 .

15. The photocurable composition according to claim 1 , which comprises the compound of the General Formula 1 or 2-(T-hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole as a component (A), and
when the component (A) is 2-(T-hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole, a content of the component (A) is 0.1 to 1.1% by mass with respect to a total composition excluding a solvent.

16. The photocurable composition according to claim 1 , which comprises 2-(2′-hydroxy-5′-tert-octylphenyl)benzotriazole, 2-(2′-hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole, or 2-(3,5-di-tert-amyl-2-hydroxyphenyl)benzotriazole as a component (A), and
when the component (A) is 2-(2′-hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole, a content of the component (A) is 0.1 to 1.1% by mass with respect to a total composition excluding a solvent.

Assignees

• Three Bond Co Ltd

Inventors

• Ueno Kazuyuki
• Arai Yoshihide
• Koga Yoshiaki

Classifications

• H10K71/50

  Forming devices by joining two substrates together, e.g. lamination techniques · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• C08F2/48 Primary

  by ultraviolet or visible light · CPC title

• H10K50/844 Primary

  Encapsulations · CPC title

• C08G64/045

  containing aliphatic unsaturation · CPC title