# US 11,079,635 B2 · Sealant and method for fabricating the same, and display device

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- Number: US 11,079,635 B2
- Document ID: US11079635B2
- Status: Granted
- Kind: B2
- Application number: 16/034,877
- Filed: 2018-07-13
- Published: 2019-07-04
- Granted: 2021-08-03
- Earliest claimed: 2018-01-03
- Assignees: Boe Technology Group Co., Ltd.; Hefei Boe Display Technology Co., Ltd.
- Applicants: BOE Technology Group Co., Ltd.; Hefei BOE Display Technology Co., Ltd.
- Inventors: Dong Xu; Xiaoqing Liu; Wenbo Dong
- Web page: https://patentgrep.com/patent/US11079635B2

## CPC

- G02F 1/1339: Gaskets; Spacers; Sealing of cells
- C08G 59/40: characterised by the curing agents used
- C08G 59/62: Alcohols or phenols
- C09J 163/10: Epoxy resins modified by unsaturated compounds
- C09K 2323/031: Polarizer or dye
- C09K 2323/055: Epoxy
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

The disclosure discloses a sealant and a method for fabricating the same, and a display device. The sealant includes a thermal-curing agent and an epoxy resin, wherein the thermal-curing agent includes a diphenyl ketone alcohol compound capable of emitting a fluorescent light and a phosphorescent light simultaneously.

## Claims

### Claim 1

A sealant film, formed from a sealant comprising a thermal-curing agent and an epoxy resin, wherein the thermal-curing agent comprises a diphenyl ketone alcohol compound capable of emitting a fluorescent light and a phosphorescent light simultaneously;
wherein the sealant film is a copolymer fluorescent/phosphorescent double-emission sealant film in which a light-emitting molecule of the diphenyl ketone alcohol compound is embedded into an epoxy resin molecule chain with a chemical bond;
wherein:
when the sealant film has no breakage, and ultraviolet (UV) illumination stops after lasting for a preset time, the sealant film emits a green phosphorescent afterglow;
when the sealant film is partially broken, under the UV illumination, the sealant film emits the fluorescent light and the phosphorescent light simultaneously, which appear as a blue and white mixed fluorescent/phosphorescent light; and
when the sealant film is completely broken, under the UV illumination, the sealant film emits a blue fluorescent light.

### Claim 2 (depends on 1)

The sealant film according to claim 1, wherein a content of the thermal-curing agent in the sealant ranges from 6 wt % to 10 wt % and a content of the epoxy resin in the sealant ranges from 45 wt % to 55 wt %.

### Claim 3 (depends on 1)

The sealant film according to claim 1, wherein the sealant further comprises an acrylate resin, and-a photo-curing agent and a solvent.

### Claim 4 (depends on 3)

The sealant film according to claim 3, wherein a content of the acrylate resin in the sealant ranges from 35 wt % to 45 wt %, and a content of the photo-curing agent in the sealant ranges from 1 wt % to 3 wt %.

### Claim 5 (depends on 4)

The sealant film according to claim 4, wherein the sealant further comprises a solvent; and a content of the solvent in the sealant is not more than 5 wt %.

### Claim 6 (depends on 3)

The sealant film according to claim 3, wherein the acrylate resin comprises a methyl methacrylate resin and/or a butyl methacrylate resin; the photo-curing agent comprises a cationic photo-curing agent and/or a radical photo-curing agent; the solvent comprises one or more of an acetone, an ethyl acetate and a butyl acetate.

### Claim 7 (depends on 1)

The sealant film according to claim 1, wherein the diphenyl ketone alcohol compound comprises one or more of:
a {4-[bis-(2-hydroxy-ethyl)-amino]-phenyl}-phenyl-ketone;
a {4-[bis-(2-hydroxy-ethyl)-amino]-phenyl}-(4-chloro-phenyl)-ketone;
a {4-[bis-(2-hydroxy-ethyl)-amino]-phenyl}-(4-fluoro-phenyl)-ketone;
a {4-[(2-hydroxy-ethyl)-methyl-amino]-phenyl}-phenyl-ketone;
a (4-chloro-phenyl)-{4-[(2-hydroxyethyl)-methyl-amino]-phenyl}-ketone;
a (4-fluoro-phenyl)-{4-[(2-hydroxy-ethyl)-methyl-amino]-phenyl}-ketone;
and a bis{4-[{2-hydroxy-ethyl}-methyl-amino]-phenyl}-ketone.

### Claim 8 (depends on 1)

The sealant film according to claim 1, wherein the epoxy resin comprises an epoxy chloropropane resin and/or an epoxypropane resin.

### Claim 9 (depends on 1)

The sealant film according to claim 1, wherein the thermal-curing agent further comprises an amine thermal-curing agent.

### Claim 10 (depends on 7)

The sealant film according to claim 7, wherein the amine thermal-curing agent comprises one or more of a hexamethylenediamine, an ethylenediamine, a (β-hydroxyethyl hexamethylenediamine, a (β-hydroxyethyl ethylenediamine and a hydroxymethyl hexamethylenediamine.

### Claim 11 (depends on 1)

A method for fabricating the sealant film according to claim 1, comprising: mixing and dissolving the diphenyl ketone alcohol compound, an acrylate resin, the epoxy resin and a solvent; and
adding a photo-curing agent, or the photo-curing agent and an amine thermal-curing agent into a mixture obtained from operations of the mixing and dissolving, and then
defoaming the mixture to obtain the sealant, prior to forming the sealant film from the sealant.

### Claim 12 (depends on 1)

A display device, comprising the sealant film according to claim 1.

### Claim 13 (depends on 12)

The display device according to claim 12, wherein a content of the thermal-curing agent in the sealant ranges from 6 wt % to 10 wt % and a content of the epoxy resin in the sealant ranges from 45 wt % to 55 wt %.

### Claim 14 (depends on 12)

The display device according to claim 12, wherein the sealant further comprises an acrylate resin, a photo-curing agent and a solvent.

### Claim 15 (depends on 14)

The display device according to claim 14, wherein a content of the acrylate resin in the sealant ranges from 35 wt % to 45 wt %, a content of the photo-curing agent in the sealant ranges from 1 wt % to 3 wt %, and a content of the solvent in the sealant is not more than 5 wt %.

### Claim 16 (depends on 14)

The display device according to claim 14, wherein the acrylate resin comprises a methyl methacrylate resin and/or a butyl methacrylate resin; the photo-curing agent comprises a cationic photo-curing agent and/or a radical photo-curing agent; the solvent comprises one or more of an acetone, an ethyl acetate and a butyl acetate.

### Claim 17 (depends on 1)

The display device according to claim 1, wherein the diphenyl ketone alcohol compound comprises one or more of:
a {4-[bis-(2-hydroxy-ethyl)-amino]-phenyl}-phenyl-ketone;
a {4-[bis-(2-hydroxy-ethyl)-amino]-phenyl}-(4-chloro-phenyl)-ketone;
a {4-[bis-(2-hydroxy-ethyl)-amino]-phenyl}-(4-fluoro-phenyl)-ketone;
a {4-[(2-hydroxy-ethyl)-methyl-amino]-phenyl}-phenyl-ketone;
a (4-chloro-phenyl)-{4-[(2-hydroxyethyl)-methyl-amino]-phenyl}-ketone;
a (4-fluoro-phenyl)-{4-[(2-hydroxy-ethyl)-methyl-amino]-phenyl}-ketone;
and a bis{4-[{2-hydroxy-ethyl}-methyl-amino]-phenyl}-ketone.

### Claim 18 (depends on 12)

The display device according to claim 12, wherein the epoxy resin comprises an epoxy chloropropane resin and/or an epoxypropane resin.

### Claim 19 (depends on 12)

The display device according to claim 12, wherein the thermal-curing agent further comprises an amine thermal-curing agent.

### Claim 20 (depends on 19)

The display device according to claim 19, wherein the amine thermal-curing agent comprises one or more of a hexamethylenediamine, an ethylenediamine, a β-hydroxyethylhexamethylenediamine, a β-hydroxyethylethylenediamine and a hydroxymethyl hexamethylenediamine.