Adhesive Composition, Adhesive Film Comprising Adhesive Composition, Back Plate Film Comprising Adhesive Film, and Plastic Organic Light Emitting Display Comprising Adhesive Film

Patent metadata

Field	Value
Publication number	US-2021284871-A1
Application number	US-201917259605-A
Country	US
Kind code	A1
Filing date	Jul 29, 2019
Priority date	Jul 27, 2018
Publication date	Sep 16, 2021
Grant date	—

Abstract

An adhesive composition, an adhesive film comprising the same, a backplate film comprising the adhesive film, and a plastic organic light emitting display comprising the adhesive film are provided. An adhesive composition includes a (meth)acrylate-based resin, and a polymer having a melting temperature (Tm) of 60° C. or higher, wherein the polymer is a copolymer of a monofunctional polysiloxane and one type of monomer.

First claim

1 . An adhesive composition comprising:
a (meth)acrylate-based resin; and a polymer having a melting temperature (Tm) of 60° C. or higher, wherein the polymer is a copolymer of a monofunctional polysiloxane and one type of monomer.

2 . The adhesive composition of claim 1 , wherein the monomer is represented by following Chemical Formula 1:

wherein, in Chemical Formula 1,
X is N or O;
R1 is hydrogen or a methyl group; and
n is an integer of 10 to 30.

3 . The adhesive composition of claim 2 , wherein n is an integer of 16 to 24.

4 . The adhesive composition of claim 1 , wherein the monofunctional polysiloxane is included in an amount of greater than or equal to 10 parts by weight and less than or equal to 40 parts by weight, and the monomer is included in an amount of greater than or equal to 60 parts by weight and less than or equal to 90 parts by weight, based on 100 parts by weight of the polymer having the melting temperature of 60° C. or higher.

5 . The adhesive composition of claim 1 , wherein the polymer having the melting temperature of 60° C. or higher is included in an amount of 1 part by weight to 10 parts by weight, based on 100 parts by weight of the (meth)acrylate-based resin.

6 . The adhesive composition of claim 2 , wherein the monomer represented by Chemical Formula 1 is behenyl acrylate (BHA).

7 . The adhesive composition of claim 1 , further comprising one or more selected from the group consisting of a solvent, a dispersant, a photoinitiator, a thermal initiator and a tackifier.

8 . An adhesive film comprising:
a base film; and an adhesive sheet comprising the adhesive composition of claim 1 or a cured material thereof provided on a surface of the base film.

9 . The adhesive film of claim 8 , further comprising a release film on a surface opposite to the surface in contact with the base film of the adhesive sheet.

10 . The adhesive film of claim 8 , wherein, after bonding a surface opposite to the surface in contact with the base film of the adhesive sheet with stainless (SUS304 substrate), the adhesive sheet comprises
initial adhesive strength after leaving unattended for 2 hours at 23° C. is 50 gf/inch or less; middle adhesive strength after leaving unattended for 24 hours at 23° C. is 55 gf/inch or less; and late adhesive strength after leaving unattended for 24 hours at 55° C. is 60 gf/inch or less.

11 . The adhesive film of claim 10 , wherein the late adhesive strength/the initial adhesive strength is greater than or equal to 0.3 and less than or equal to 2.0.

12 . The adhesive film of claim 8 , wherein the adhesive sheet has a thickness of greater than or equal to 3 μm and less than or equal to 100 μm.

13 . The adhesive film of claim 8 , wherein the adhesive film has a thickness of greater than or equal to 50 μm and less than or equal to 300 μm.

14 . A backplate film comprising:
the adhesive film of claim 8 ; and a protective film provided on a base film side of the adhesive film.

15 . A plastic organic light emitting display comprising:
the adhesive film of claim 8 ; a plastic substrate provided on an adhesive sheet side of the adhesive film; and an organic light emitting layer provided on a surface opposite to the surface in contact with the adhesive film of the plastic substrate.

16 . The plastic organic light emitting display of claim 15 , comprising a protective film provided on the base film side of the adhesive film.

Assignees

• Lg Chemical Ltd

Inventors

• Han Sanghun
• Kwon Yoonkyung
• Park Byungsu
• Lee Hui Je
• Kang Seongwook

Classifications

• C09J7/24 Primary

  based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds · CPC title

• C09J7/385 Primary

  Acrylic polymers · CPC title

• C09J183/04

  Polysiloxanes · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C09J2301/312

  parameters being the characterizing feature · CPC title