Sealant compositions, methods of preparing sealant compositions and display panel including sealants

Patent metadata

Field	Value
Publication number	US-9752065-B2
Application number	US-201414517045-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	Jan 2, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A sealant composition includes a curable sealing resin, and a plurality of microcapsules dispersed in the sealing resin. Each of the plurality of microcapsules includes a self-curable healing agent and a capsule coating film encapsulating the healing agent.

First claim

What is claimed is:

1. A sealant composition, comprising:
a curable sealing resin; and
a plurality of microcapsules dispersed in the sealing resin, each of the microcapsules comprising:
a self-curable healing agent; and
a capsule coating film encapsulating the healing agent, wherein the capsule coating film has an elastic modulus lower than an elastic modulus of the sealing resin.

2. The sealant composition of claim 1 , wherein the healing agent is self-cured upon exposure to moisture.

3. The sealant composition of claim 2 , wherein the healing agent comprises at least one of a cyanoacrylate derivative and a urethane derivative.

4. The sealant composition of claim 1 , wherein the capsule coating film has a moisture permeability greater than a moisture permeability of the sealing resin.

5. The sealant composition of claim 1 , wherein the capsule coating film comprises at least one of an acrylate-based polymer, a polyurethane-based polymer and a polyurea-based polymer.

6. The sealant composition of claim 1 , wherein the microcapsules have a diameter of about 2 μm to about 20 μm.

7. The sealant composition of claim 1 , wherein an amount of the microcapsules is equal to or less than about 20% by volume, based on a total volume of the sealant composition.

8. The sealant composition of claim 1 , wherein the sealing resin comprises a modified epoxy resin comprising at least one of an acrylate group, an isocyanate group and a hydroxyl group.

9. The sealant composition of claim 1 , further comprising an alkali metal-based catalyst.

10. The sealant composition of claim 1 , further comprising a softening agent.

11. A method of manufacturing a sealant composition, comprising:
preparing a solution of a self-curable healing agent;
forming a capsule coating film encapsulating the healing agent;
curing the capsule coating film to form a plurality of microcapsules; and
mixing the microcapsules with a curable sealing resin,
wherein the capsule coating film has an elastic modulus lower than an elastic modulus of the sealing resin.

12. The method of claim 11 , wherein the healing agent solution is prepared by dispersing at least one of a cyanoacrylate derivative and a urethane derivative into an organic solvent.

13. The method of claim 11 , wherein forming the capsule coating film comprises:
extruding a coating solution together with the healing agent solution through a micro-nozzle, wherein the coating solution comprises a polymer for forming the capsule coating film; and
forming a droplet comprising the capsule coating film and the healing agent.

14. The method of claim 13 , wherein the droplet is formed using an ultrasonic wave generator.

15. The method of claim 13 , wherein the polymer for forming the capsule coating film comprises at least one of an acrylate-based polymer, a polyurethane-based polymer and a polyurea-based polymer.

16. A display panel, comprising:
a first substrate;
a display element comprising a plurality of pixels on the first substrate;
a second substrate facing the first substrate; and
a sealant surrounding the display element between the first substrate and the second substrate, the sealant comprising a sealant composition that comprises,
a curable sealing resin; and
a plurality of microcapsules dispersed in the sealing resin, each of the microcapsules comprising a self-curable healing agent and a capsule coating film encapsulating the healing agent, wherein the capsule coating film has an elastic modulus lower than an elastic modulus of the sealing resin.

17. The display panel of claim 16 , wherein the healing agent comprises at least one of a cyanoacrylate derivative and a urethane derivative.

18. The display panel of claim 16 , wherein the capsule coating film has a moisture permeability greater than a moisture permeability of the sealing resin.

Assignees

• Samsung Display Co Ltd

Inventors

• Ahn Byung-Wook

Classifications

• C09K3/10

  {Materials in mouldable or extrudable form} for sealing or packing joints or covers (filling pastes C09D5/34) · CPC title

• Y10T428/31511

  Of epoxy ether · CPC title

• C08K9/10

  Encapsulated ingredients · CPC title

• C09J163/10

  Epoxy resins modified by unsaturated compounds · CPC title

• C09J163/00 Primary

  Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins · CPC title