Curable composition comprising hygroscopic particle and display device comprising the same

Patent metadata

Field	Value
Publication number	US-11678505-B2
Application number	US-202017039056-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Oct 1, 2019
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

Provided are a curable composition and a display device which include a hygroscopic particle comprising a metal core and a silane surface modification part connected to the metal core, to provide an encapsulation part having excellent anti-moisture and optical properties.

First claim

What is claimed is:

1. A curable composition comprising:
A hygroscopic particle comprising a metal core comprising a rare earth metal and a silane surface modification part connected to the metal core; and
a photocurable monomer,
wherein the metal core comprises a hydroxide of the rare earth metal.

2. The curable composition according to claim 1 , wherein the metal core comprises one or more of lanthanum (La); Scandium (Sc); Yttrium (Y); Cerium (Ce); Neodymium (Nd); Promethium (Pm); Samarium (Sm); Gadolinium (Gd); Terbium (Tb); Holmium (Ho); Erbium (Er); Tolium (Tm); Ytterbium (Yb); and ruthenium (Lu).

3. The curable composition according to claim 1 , wherein the silane surface modification part is formed by dehydration condensation reaction between a silane coupling agent and the rare earth metal.

4. The curable composition according to claim 3 , wherein the silane coupling agent is one or more of 3-methacryloxypropyl trimethoxysilane; 3-methacryloxypropyltriethoxysilane; Vinyl trimethoxysilane; Vinyl triethoxysilane;
Methacryloxymethyltrimethoxysilane; Methacryloxymethyltriethoxysilane; 3-aminopropyltriethoxysilane; 3-aminopropyltrimethoxysilane; 3-mercaptoacryloxypropyl trimethoxysilane; 3-mercaptoacryloxypropyltriethoxysilane; 3-glycidoxypropyltrimethoxysilane; 3-glycidoxypropyltriethoxysilane; N-phenyl aminopropyl trimethoxysilane; N -phenylaminopropyltriethoxysilane; and hexamethyldisilazane.

5. The curable composition according to claim 1 , wherein a diameter of the hygroscopic particles is 1 nm to 100 nm.

6. The curable composition according to claim 1 , wherein the hygroscopic particle comprises a partial structure represented by the following chemical formula 1 on the surface:
Si(OX)aYb   [Chemical Formula 1]

in the chemical Formula 1,
a and b are each an integer from 1 to 3, a+b is 4,
X is a metal atom of the metal core,
Y is, independently of each other, a hydroxy group, an alkyl group of C1-C20, or an alkenyl group of C2-C20, and
wherein the alkyl group and the alkenyl group is substituted or unsubstituted with at least one of an acryloxy group, a methacryloxy group, an amine group, a mercaptoacryloxy group, a mercaptomethacryloxy group, and a glycidoxy group, respectively.

7. The curable composition according to claim 1 , wherein the photocurable monomer comprises a (meth) acryloyl group.

8. The curable composition according to claim 1 , wherein the hygroscopic particle includes 0.1 to 5 parts by weight, and the photocurable monomer includes 90 to 99.9 parts by weight.

9. The curable composition according to claim 1 , further comprising an initiator.

10. A display device comprising:
a substrate;
an organic electric element located on the substrate; and
an encapsulation part comprising a hygroscopic particle comprising a rare earth metal core and a silane surface modification part connected to the metal core and positioned on a peripheral portion of the substrate and surrounding a side surface of the organic electric element wherein the metal core comprises a hydroxide of the rare earth metal.

11. The display device according to claim 10 , wherein the encapsulation part further comprises a (meth) acrylate resin, and
wherein the hygroscopic particle is dispersed in the (meth) acrylate resin.

12. The display device according to claim 11 , wherein the encapsulation part includes a haze of 10% or less.

13. The display device according to claim 11 , wherein the encapsulation part has a transmittance of 85% or higher for light with a wavelength of 450 nm.

14. The display device according to claim 11 , further comprising:
an encapsulation substrate facing the substrate,
a color filter positioned on one surface of the encapsulation substrate, and
a thin film transistor positioned on one surface of the substrate.

15. The display device according to claim 14 , further comprising a passivation layer positioned to cover the upper and side portions of the organic electric element,
wherein a portion of the encapsulation part is located on the passivation layer.

16. The display device according to claim 14 , further comprising a filling resin filling a gap between the organic electric element and the encapsulation substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Sunghee
• Song Jaebin
• Lee Suyeon
• Park Junghyuk
• Back Sungdoo
• Myoung Jaemin

Classifications

• C08F2/44

  Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers · CPC title

• C09D4/06

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00 · CPC title

• C08L33/06

  of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical · CPC title

• C08K3/22

  of metals · CPC title

• C08K9/06

  with silicon-containing compounds · CPC title