Encapsulating composition

Patent metadata

Field	Value
Publication number	US-12104075-B2
Application number	US-201716467415-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Dec 9, 2016
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

The present application relates to an encapsulating composition and an organic electronic device comprising the same, and provides an encapsulating composition which can effectively block moisture or oxygen introduced into an organic electronic device from the outside to secure the lifetime of the organic electronic device, is possible to realize a top emission type organic electronic device, is applicable to an inkjet method and can maintain reliability of a sealing structure under severe conditions such as high temperature and high humidity while providing a thin display, and an organic electronic device comprising the same.

First claim

The invention claimed is:

1. An organic electronic device comprising:
a substrate;
an organic electronic element formed on the substrate; and
an organic layer sealing the entire surface of the organic electronic element and comprising an encapsulating composition,
wherein the encapsulating composition comprises:
a curable compound; and
a surfactant having a polar functional group, wherein the surfactant is a non-silicone-based surfactant,
wherein the encapsulating composition has a surface energy after curing in a form of a sealing layer in a range of 20 mN/m to 30 mN/m,
wherein the curable compound comprises a curable compound having a cyclic structure in its molecular structure and having at least two or more curable functional groups, a monofunctional curable compound having a curable functional group and a coupling agent,
wherein the monofunctional curable compound is comprised in a range of 65 parts by weight to 157 parts by weight relative to 100 parts by weight of the curable compound having a cyclic structure,
wherein the curable functional groups are one or more selected from the group consisting of a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group, an amide group, an epoxide group, a sulfide group, an acetal group and a lactone group, and
wherein the encapsulating composition has a light transmittance of 90% or more in the visible light region after curing.

2. The organic electronic device according to claim 1 , wherein the compound having a cyclic structure in its molecular structure has ring constituent atoms in the molecular structure in a range of 3 to 10.

3. The organic electronic device according to claim 1 , wherein the curable compound further comprises a linear or branched aliphatic curable compound.

4. The organic electronic device according to claim 3 , wherein the aliphatic curable compound has two or more curable functional groups.

5. The organic electronic device according to claim 3 , wherein the aliphatic curable compound is comprised in a range of 20 parts by weight or more and less than 205 parts by weight relative to 100 parts by weight of the curable compound having a cyclic structure.

6. The organic electronic device according to claim 1 , wherein the curable compound further comprises a curable compound having an oxetane group.

7. The organic electronic device according to claim 6 , wherein the curable compound having an oxetane group has two or more oxetane groups.

8. The organic electronic device according to claim 6 , wherein the curable compound having an oxetane group is comprised in an amount of 50 parts by weight to 150 parts by weight relative to 100 parts by weight of the curable compound having a cyclic structure and the monofunctional curable compound.

9. The organic electronic device according to claim 1 , wherein the surfactant comprises a fluorine-based compound.

10. The organic electronic device according to claim 1 , wherein the surfactant is comprised in an amount of 0.01 parts by weight to 10 parts by weight relative to 100 parts by weight of the entire curable compound.

11. The organic electronic device according to claim 1 , the encapsulating composition further comprises a photoinitiator.

12. A method for manufacturing the organic electronic device of claim 1 , comprising a step of:
forming the organic layer comprising the encapsulating composition on the substrate on which the organic electronic element is formed, so that the encapsulating composition seals the entire surface of the organic electronic element.

13. The method for manufacturing the organic electronic device according to claim 12 , wherein the step of forming the organic layer comprises inkjet printing, gravure coating, spin coating, screen printing or reverse offset coating.

Assignees

• Lg Chemical Ltd

Inventors

• Yu Mi Lim
• Kim Joon Hyung
• Woo Yu Jin
• Choi Kook Hyun

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• C09D163/00 Primary

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K85/111

  comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene · CPC title