Transparent resin composition for organic electroluminescent element sealing, resin sheet for organic electroluminescent element sealing, and image display device

Patent metadata

Field	Value
Publication number	US-10115904-B2
Application number	US-201514857335-A
Country	US
Kind code	B2
Filing date	Sep 17, 2015
Priority date	Mar 19, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A transparent resin composition for organic EL element sealing and other things having a sufficient moisture blocking effect and excellent flexibility is provided. A thermoplastic resin, a tackifying resin, and an organometallic compound having at least an ester bond and represented by the following formula are included, and in which the light transmittance for light is 85% or higher, the relationship: AM/Y<162 is satisfied, and the thermoplastic resin includes a hydride of a styrene-based A-B-A type triblock body.

(wherein R 1 , R 2 , R 4 and R 6 represent organic groups including an alkyl group, an aryl group, a cycloalkyl group, and an acyl group each having a carbon number of 1˜8; R 3 and R 5 represent organic groups including an alkyl group, an aryl group, an alkoxy group, a cycloalkyl group, and an acyl group each having a carbon number of 1˜8; and M represents a trivalent metal atom.)

First claim

The invention claimed is:

1. A transparent resin composition for organic electroluminescent element sealing, comprising:
a thermoplastic resin comprising a hydride of a styrene-based A-B-A triblock body;
a tackifying resin which is at least one selected from the group consisting of a hydride of a C5-based petroleum resin, a hydride of a C9-based petroleum resin, and a hydride of a petroleum resin obtained by copolymerizing a C5-based petroleum resin and a C9-based petroleum resin; and
an organometallic compound comprising an ester bond and represented by Formula (1),

where R 1 , R 2 , R 4 , and R 6 each represents an organic group comprising an alkyl group, an aryl group, a cycloalkyl group, or an acyl group each having a carbon number of 1 or more and 8 or less; R 3 and R 5 each represents an organic group comprising an alkyl group, an aryl group, an alkoxy group, a cycloalkyl group, or an acyl group each having a carbon number of 1 or more and 8 or less; M represents a trivalent metal atom; and R 1 to R 6 are identical organic groups or different organic groups,
wherein
the transparent resin composition has a light transmittance of 85% or higher for light having a wavelength of 550 nm at a thickness of 0.1 mm, and
the transparent resin composition satisfies a relationship: AM/Y<162, where A (mg CH 3 ONa/g) represents an acid value of the transparent resin composition excluding the organometallic compound, M represents a weight average molecular weight of the organometallic compound, and Y represents a weight ratio of the organometallic compound with respect to 100 parts by weight of the resin components.

2. The transparent resin composition for organic electroluminescent element sealing according to claim 1 ,
wherein the styrene-based A-B-A triblock body is at least one selected from the group consisting of a styrene-ethylene-butylene-styrene copolymer, a styrene-ethylene-propylene-styrene copolymer, a styrene-ethylene-ethylene-propylene-styrene copolymer, and a styrene-isobutylene-styrene copolymer.

3. The transparent resin composition for organic electroluminescent element sealing according to claim 1 ,
wherein the tackifying resin comprises a hydride of a C5-based petroleum resin.

4. A resin sheet for organic electroluminescent element sealing, comprising:
a sealing layer formed from the transparent resin composition for organic electroluminescent element sealing according to claim 1 .

5. An image display device, comprising:
an organic electroluminescent element;
a sealing substrate; and
the resin sheet for organic electroluminescent element sealing according to claim 4 interposed between the organic electroluminescent element and the sealing substrate.

6. The transparent resin composition for organic electroluminescent element sealing according to claim 1 , wherein the tackifying resin comprises a hydride of a C9-based petroleum resin.

7. A resin sheet for organic electroluminescent element sealing, comprising:
a sealing layer formed from the transparent resin composition for organic electroluminescent element sealing according to claim 2 .

8. The transparent resin composition for organic electroluminescent element sealing according to claim 1 , further comprising a plasticizer.

9. The transparent resin composition for organic electroluminescent element sealing according to claim 1 ,
wherein the tackifying resin comprises a hydride of a petroleum resin obtained by copolymerizing a C5-based petroleum resin and a C9-based petroleum resin.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Ishiguro Kunihiko
• Mieda Tetsuya

Classifications

• H01L51/524

  Electricity · mapped topic

• C08K5/098

  Metal salts of carboxylic acids · CPC title

• H01L51/0081

  Electricity · mapped topic

• C08K5/0091

  Complexes with metal-heteroatom-bonds · CPC title

• H01L51/5237

  Electricity · mapped topic