Desiccant and the same desiccant-employing organic EL element

Patent metadata

Field	Value
Publication number	US-9662633-B2
Application number	US-201313751888-A
Country	US
Kind code	B2
Filing date	Jan 28, 2013
Priority date	Jan 31, 2012
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

The invention relates to a desiccant suitable for being used with an organic EL element having a solid sealing structure. The desiccant is provided for suppressing any effect on an organic layer, and guaranteeing flowability while being filled. An organic EL element has a container, which includes an element substrate on which a laminate of a pair of electrodes and an organic layer located between the pair of electrodes is disposed, a sealing substrate spaced apart from the element substrate, a sealing agent disposed between the element substrate and the sealing substrate thereby hermetically sealing the container, and the desiccant disposed inside the container. In this configuration, the container is filled with the desiccant, and the laminate is thus surrounded by the desiccant. The desiccant is obtained by mixing a water-trapping agent with silicone. The water-trapping agent is present in an amount of 50-95% by weight and the silicone is present in an amount of 5-50% by weight based on the total weight of the desiccant.

First claim

What is claimed is:

1. A desiccant to be disposed in a hermetically sealed container, consisting essentially of
as a water-trapping agent 50-95% by weight of an organometallic compound having a unit structure as illustrated by Formula 3 based on a total weight of the desiccant, and
5-50% by weight of silicone as illustrated by Formula 2 based on the total weight of the desiccant, wherein the desiccant includes no organic solvent,

in Formula 3, R 1 represents an organic group including alkyl group, aryl group, alkoxy group, cycloalkyl group, heterocyclic group or acyl group having at least one carbon atom, M is a trivalent metal atom, n is an integer of at least one indicating degree of polymerization, and each of R 1 may be equal to or different from each other; and in Formula 2 R represents a substituent, n is an integer of at least one indicating degree of polymerization, and each of R may be equal to or different from each other, and
wherein the organometallic compound having a unit structure as illustrated by Formula 3 is represented by Formula 8 or Formula 10 illustrated below,

in Formula 8, each of R 1 -R 3 independently represents an organic group including alkyl group, aryl group, alkoxy group, cycloalkyl group, heterocyclic group or acyl group having at least one carbon atom, and M is a trivalent metal; and in Formula 10, each of R 1 -R 3 independently represents an organic group including alkyl group, aryl group, alkoxy group, cycloalkyl group, heterocyclic group or acyl group having at least one carbon atom, M is a trivalent metal atom, n is an integer of at least one indicating the degree of polymerization, each of R 1 may be equal to or different from each other, and the definition of R 2 and R 3 may be equal to the definition of R 1 of Formula 3.

2. An organic EL element having a container, the container comprising:
an element substrate on which a laminate of a pair of electrodes and an organic layer located between the pair of electrodes is disposed,
a sealing substrate spaced apart from the element substrate,
a sealing agent disposed between the element substrate and the sealing substrate thereby hermetically sealing the container, and
a desiccant as claimed in claim 1 disposed inside the container, wherein the container is filled with the desiccant, and the laminate is surrounded by the desiccant.

Assignees

• Futaba Denshi Kogyo Kk

Inventors

• Hoshina Yusuke
• Kajiyama Riki
• Fujimura Youhei

Classifications

• B01J2220/44

  Materials comprising a mixture of organic materials (materials coated or impregnated on a carrier B01J20/32) · CPC title

• B01J20/223 Primary

  containing metals, e.g. organo-metallic compounds, coordination complexes · CPC title

• B01J20/262 Primary

  obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation (macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds per se C08G) · CPC title

• H05B33/04

  Sealing arrangements {, e.g. against humidity} · CPC title

• B01D53/28

  Selection of materials for use as drying agents · CPC title