Adhesive composition and display device

Patent metadata

Field	Value
Publication number	US-11041099-B2
Application number	US-201816018007-A
Country	US
Kind code	B2
Filing date	Jun 25, 2018
Priority date	Nov 24, 2014
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

Disclosed are an adhesive composition that includes: a first photopolymerization initiator having a maximum absorption wavelength in a range of about 350 nm to about 370 nm and a second photopolymerization initiator having a maximum absorption wavelength in a range of about 380 nm to about 390 nm, and a method of manufacturing a display device.

First claim

What is claimed is:

1. An adhesive composition comprising:
a monomer in an amount of about 15 percentage by weight (wt %) to about 30 wt % with respect to the total weight of the adhesive composition;
an oligomer in an amount of about 20 wt % to about 40 wt % with respect to the total weight of the adhesive composition;
a rubber-based elastic component in an amount of about 25 wt % to about 50 wt % with respect to the total weight of the adhesive composition; and
a photopolymerization initiator in an amount of about 2 wt % to 7 wt % with respect to the total weight of the adhesive composition,
wherein the photopolymerization initiator comprises a first photopolymerization initiator photo-sensitive in a range of a wavelength from about 350 nm to about 370 nm and a second photopolymerization initiator photo-sensitive in a range of a wavelength from about 380 nm to about 390 nm,
the first photopolymerization initiator and the second photopolymerization initiator have a content ratio of about 5˜2:1,
wherein the rubber-based elastic component is at least one selected from the group consisting of polybutadiene and polyisoprene, the polybutadiene consisting of polybutadiene,
wherein the monomer comprises a monofunctional monomer and a polyfunctional monomer,
wherein the monofunctional monomer comprises at least one selected from nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropylacrylate, 2-ethylhexylcarbitolacrylate, 2-hydroxyethylacrylate, and N-vinylpyrrolidone (NVP), and
wherein the polyfunctional monomer comprises at least one selected from 1,6-hexandiol di(meth)acrylate, ethyleneglycol di(meth)acrylate, neopentylglycol di(meth)acrylate, triethyleneglycol di(meth)acrylate, bisphenol A bis(acryloyloxyethyl)ether, and 3-methylpentanediol di(meth)acrylate.

2. The adhesive composition of claim 1 , wherein the first photopolymerization initiator is represented by at least one of the following Chemical Formulas 1 through 3:

3. The adhesive composition of claim 1 , wherein the second photopolymerization initiator is represented by the following Chemical Formula 4:

4. The adhesive composition of claim 1 , wherein the monomer is at least one selected from the group consisting of isobornyl acrylate, n-octyl acrylate, tetrahydrofurfuryl acrylate, and 4-hydroxy butyl acrylate.

5. The adhesive composition of claim 1 , wherein the oligomer is at least one selected from the group consisting of urethane (meth)acrylate and ester (meth)acrylate that have a weight average molecular weight(Mw) in a range of about 5,000 Mw to about 50,000 Mw.

6. The adhesive composition of claim 1 , wherein the polybutadiene and polyisoprene have a weight average molecular weight (Mw) in a range of about 10,000 Mw to about 100,000 Mw.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwack Junho
• You Jongsung

Classifications

• C09J11/06

  organic · CPC title

• B32B2037/1253

  curable adhesive · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• C09J133/00

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers · CPC title

• C09J4/00 Primary

  Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16} · CPC title