Encapsulating composition

Patent metadata

Field	Value
Publication number	US-12202997-B2
Application number	US-201915734510-A
Country	US
Kind code	B2
Filing date	Jun 12, 2019
Priority date	Jun 12, 2018
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

An encapsulating composition and an organic electronic device comprising the same, and the encapsulating composition which is capable of effectively blocking moisture or oxygen penetrating into the organic electronic device from the outside to secure the lifetime of the organic electronic device, implementing a top-emitting organic electronic device, being applied in an inkjet method, and providing a thin display.

First claim

The invention claimed is:

1. An encapsulating composition, comprising an epoxy compound, a compound having an oxetane group included in an amount of 68 to 145 parts by weight relative to 100 parts by weight of the epoxy compound, and a moisture adsorbent having an average particle diameter of 98 nm to 495 nm,
wherein the epoxy compound comprises a compound having a cyclic structure in its molecular structure and a linear or branched aliphatic compound, and
wherein the linear or branched aliphatic compound is included in an amount of 80 parts by weight or more and less than 205 parts by weight relative to 100 parts by weight of the compound having a cyclic structure.

2. The encapsulating composition according to claim 1 , wherein at least one of the compound having a cyclic structure in its molecular structure and the linear or branched aliphatic compound is at least bifunctional.

3. The encapsulating composition according to claim 1 , wherein the compound having an oxetane group has a boiling point in a range of 90 to 300° C.

4. The encapsulating composition according to claim 1 , wherein the compound having an oxetane group has a weight average molecular weight in a range of 150 to 1,000 g/mol.

5. The encapsulating composition according to claim 1 , further comprising an ionic photoinitiator.

6. The encapsulating composition according to claim 5 , wherein the ionic photoinitiator is a photoinitiator comprising a sulfonium salt.

7. The encapsulating composition according to claim 5 , wherein the photoinitiator is included in an amount of 1 to 15 parts by weight relative to 100 parts by weight of the epoxy compound.

8. The encapsulating composition according to claim 1 , further comprising a surfactant.

9. The encapsulating composition according to claim 8 , wherein the surfactant comprises a polar functional group.

10. The encapsulating composition according to claim 8 , wherein the surfactant comprises a fluorine-based compound.

11. The encapsulating composition according to claim 8 , wherein the surfactant is included in an amount of 0.01 parts by weight to 10 parts by weight relative to 100 parts by weight of the epoxy compound.

12. The encapsulating composition according to claim 1 , which is a solventless ink composition.

13. The encapsulating composition according to claim 1 , having a viscosity of 50 cPs or less as measured by Brookfield's DV-3 at a temperature of 25° C., a torque of 90% and a shear rate of 100 rpm.

14. The encapsulating composition according to claim 1 , wherein the moisture adsorbent is a chemically reactive adsorbent.

15. The encapsulating composition according to claim 1 , wherein the moisture adsorbent is included in an amount of 5 to 150 parts by weight relative to 100 parts by weight of the epoxy compound.

16. 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 containing the encapsulating composition according to claim 1 .

17. A method for manufacturing an organic electronic device comprising a step of forming an organic layer containing the encapsulating composition according to claim 1 on a substrate having an organic electronic element formed thereon, such that the encapsulating composition seals the entire surface of the organic electronic element.

18. The method for manufacturing an organic electronic device according to claim 17 , 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

• Kwak Ji Won
• Choi Kook Hyun
• Yu Mi Lim
• Kim Dong Hwan
• Jung Hae Jong

Classifications

• C09D171/02 Primary

  Polyalkylene oxides · CPC title

• C08G59/24 Primary

  carbocyclic · CPC title

• H10K85/151

  Copolymers · CPC title

• H10K85/111

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

• H10K50/844

  Encapsulations · CPC title