Encapsulating composition

Patent metadata

Field	Value
Publication number	US-10913874-B2
Application number	US-201716467440-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Dec 9, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

The present application relates to an encapsulating composition, an organic electronic device, a method for evaluating reliability of the organic electronic device and a method for preparing the organic electronic device, and provides an encapsulating composition which can improve flatness and adhesion of an organic layer sealing an organic electronic element to effectively block moisture or oxygen introduced into an organic electronic device from the outside, thereby securing the lifetime of the organic electronic device.

First claim

The invention claimed is:

1. An encapsulating composition comprising a curable compound,
wherein the curable compound includes 5 to 50 parts by weight of a curable compound having a cyclic structure in its molecular structure and 25 parts by weight to 80 parts by weight of a vinyl ether curable compound, and
wherein, when the encapsulating composition is in a state of being cured to have a form of an organic layer that comprises a primary pattern which is extended in one direction and a secondary pattern which is extended in one direction and formed adjacent to the primary pattern, the organic layer satisfies a ratio (h/Hx100) of the height h of the groove portion between the primary pattern and the secondary pattern to the thickness H of the organic layer, of 50% or less.

2. The encapsulating composition according to claim 1 , wherein the primary pattern or the secondary pattern has a width in a range of 2 to 150 mm.

3. The encapsulating composition according to claim 1 , wherein the thickness H of the organic layer is in a range of 2 to 25 μm.

4. The encapsulating composition according to claim 1 , wherein the curable compound comprises at least one or more curable functional groups.

5. The encapsulating composition according to claim 1 , wherein the curable compound further comprises a curable compound having an oxetane group.

6. The encapsulating composition according to claim 5 , wherein the curable compound having an oxetane group is comprised in an amount of 5 to 90 parts by weight relative to 100 parts by weight of the vinyl ether curable compound.

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

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

9. The encapsulating composition according to claim 1 , further comprising a photosensitizer.

10. 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,
wherein the organic layer is a cured product of the encapsulating composition of claim 1 that has a primary pattern which is extended in one direction and a secondary pattern which is extended in one direction and formed adjacent to the primary pattern, and has a ratio (h/Hx100) of the height h of the groove portion between the primary pattern and the secondary pattern to the thickness H of the organic layer, of 50% or less.

11. A method for evaluating reliability of an organic electronic device, comprising:
providing an organic electronic device including a substrate; an organic electronic element formed on the substrate; and an organic layer sealing the entire surface of the organic electronic element, wherein the organic layer is a cured product of the encapsulating composition of claim 1 that has a primary pattern which is extended in one direction and a secondary pattern which is extended in one direction and formed adjacent to the primary pattern;
measuring a ratio h/Hx100 of the height h of the groove portion between the primary pattern and the secondary pattern to the thickness H of the organic layer; and
determining whether the ratio is within a range of 50% or less.

12. A method for preparing an organic electronic device comprising a step of forming an organic layer on a substrate in which an organic electronic element is formed on its upper part, so that the encapsulating composition of claim 1 seals the entire surface of the organic electronic element.

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

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• C09D11/30

  Inkjet printing inks · CPC title

• C08F283/10

  on to polymers containing more than one epoxy radical per molecule {(C08F283/004 takes precedence)} · CPC title

• H10K50/844

  Encapsulations · 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

• C08F16/32

  Monomers containing two or more unsaturated aliphatic radicals · CPC title