# US 9,752,052 B2 · Auto-repairing compositions for overcoat layer, method of producing the same, and display apparatus

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- Number: US 9,752,052 B2
- Document ID: US9752052B2
- Status: Granted
- Kind: B2
- Application number: 14/369,464
- Filed: 2013-12-20
- Published: 2015-01-29
- Granted: 2017-09-05
- Earliest claimed: 2013-07-15
- Assignees: Boe Technology Group Co., Ltd.; Beijing Boe Display Technolody Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.; Beijing Boe Display Technology Co., Ltd.
- Inventors: Tonghua Yang; Min Li; Jikai Zhang; Sikai Zhang; He Feng
- Web page: https://patentgrep.com/patent/US9752052B2

## CPC

- C09D 175/04: Polyurethanes
- C08F 222/10: Esters
- C08G 59/4215: {cycloaliphatic}
- C08G 59/4223: {aromatic}
- C08G 59/44: Amides
- C08K 5/101: of monocarboxylic acids
- C09D 4/06: {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
- C09D 133/06: of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D 133/068: {containing glycidyl groups}
- C09D 133/08: Homopolymers or copolymers of acrylic acid esters
- C09D 133/14: of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
- C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- G02F 1/133516: {Methods for their manufacture, e.g. printing, electro-deposition or photolithography}
- C08F 222/104: {of tetraalcohols, e.g. pentaerythritol tetra(meth)acrylate}
- G02F 1/133519: {Overcoatings}
- Y10T 428/254: Polymeric or resinous material
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed are an auto-repairing composition for overcoat layer, a method of producing the same, and a display apparatus. The composition for overcoat layer comprising 1-10 wt % of microcapsules based on the total weight of the composition for overcoat layer, said microcapsule including a capsule wall and a capsule core, wherein the capsule wall comprises an alkali-insoluble resin, and the capsule core comprises, based on the total weight of the capsule core, 30-60 wt % of a photo-curable unsaturated oligomer, 30-60 wt % of a photo-polymerizable monomer, 1-10 wt % of a photo-initiator, and 0-5 wt % of additive.

## Claims

### Claim 1

A composition for overcoat layer comprising: 1-10 wt % of microcapsules, wherein a wall of the microcapsule comprises an alkali-insoluble resin, the alkali-insoluble resin comprises an epoxy resin or a polyurethane resin, and a capsule core comprises:
30-60 wt % of a photo-curable unsaturated resin oligomer;
30-60 wt % of a photo-polymerizable monomer;
1-10 wt % of a photoinitiator; and
0-5 wt % of an additive; and
the composition for overcoat layer further comprises:
1-20 wt % of an epoxy group-containing acrylate resin;
1-20 wt % of a curing agent;
70.5-83.5 wt % of an organic solvent, the organic solvent comprises one or more selected from the group consisting of propylene glycol monomethyl ether acetate and 3-ethyl ethoxypropionate; and
0.01-2 wt % of an adjuvant.

### Claim 2 (depends on 1)

The composition for overcoat layer of claim 1, wherein:
the photo-curable unsaturated resin oligomer comprises one or more selected from the group consisting of epoxy acrylic resin, polyester acrylic resin, and polyurethane acrylate;
the photo-polymerizable monomer comprises one or more selected from the group consisting of dipentaerythritol hexacrylate, trimethylolpropane triacrylate, pentaerythritol tetracrylate, and dipentaerythritol pentacrylate; and
the photoinitiator comprises one or more selected from the group consisting of benzoin, benzoin dimethylether, deoxybenzoin, α-hydroxyalkylphenone, aroyl phosphine oxide, dibenzoylphenylphosphine oxide, benzophenone, 2,4-dihydroxybenzophenone, thiopropoxythioxanthone and isopropylthioxanthone.

### Claim 3 (depends on 1)

The composition for overcoat layer of claim 1, wherein:
the epoxy group-containing acrylate resin comprises one or more selected from the group consisting of methyl acrylate-modified epoxy resin, methyl methacrylate-modified epoxy resin, ethyl acrylate-modified epoxy resin, ethyl methacrylate-modified epoxy resin, butyl acrylate-modified epoxy resin, butyl methacrylate-modified epoxy resin, acrylate copolymer-modified epoxy resin and methacrylatecopolymer-modified epoxy resin; and
the curing agent comprises one or more selected from the group consisting of maleic anhydride, phthalic anhydride, trimellitic anhydride and polyamide resin.

### Claim 4 (depends on 1)

The composition for overcoat layer of claim 1, wherein the additive and the adjuvant are one or more selected from the group consisting of adhesion promotor and leveling agent, respectively.

### Claim 5

A method of producing the composition for overcoat layer comprising:
mixing and dispersing 30-60 wt % of a photo-curable unsaturated resin oligomer, 30-60 wt % of a photo-polymerizable monomer, 1-10 wt % of a photoinitiator, and 0-5 wt % of an additive to produce a composition for capsule core of microcapsule;
adding the composition for capsule core dropwise into a solution for capsule wall of microcapsule to form a composition for microcapsule, wherein a capsule wall of microcapsule comprises an epoxy resin or a polyurethane resin; and
mixing 1-10 wt % of microcapsules with other components of the composition for overcoat layer to form the composition for overcoat layer;
wherein the other components of the composition for overcoat layer comprises 1-20 wt % of an epoxy group-containing acrylate resin, 1-20 wt % of a curing agent, 70.5-83.5 wt % of an organic solvent, and 0.01-2 wt % of an adjuvant, the organic solvent comprises one or more selected from the group consisting of propylene glycol monomethyl ether acetate and 3-ethyl ethoxypropionate.

### Claim 6 (depends on 5)

The method of producing the composition for overcoat layer of claim 5, wherein the mixing and dispersing 30-60 wt % of the photo-curable unsaturated resin oligomer, 30-60 wt % of the photo-polymerizable monomer, 1-10 wt % of the photoinitiator, and 0-5 wt % of the additive to produce the composition for capsule core comprises:
mixing 30-60 wt % of the photo-curable unsaturated resin oligomer, 30-60 wt % of the photo-polymerizable monomer, 1-10 wt % of the photoinitiator, and 0-5 wt % of the additive to form a mixture; and
dispersing the mixture under agitation at 300 to 1,000 rpm for 1 to 4 hours.

### Claim 7 (depends on 1)

A display apparatus comprising a color filter substrate, wherein the composition for overcoat layer of claim 1 is used to form the overcoat layer of the color filter substrate.

### Claim 8 (depends on 5)

The method of producing the composition for overcoat layer of claim 5, wherein:
the photo-curable unsaturated oligomer comprises one or more selected from the group consisting of epoxy acrylic resin, polyester acrylic resin, and polyurethane acrylate;
the photo-polymerizable monomer comprises one or more selected from the group consisting of dipentaerythritol hexacrylate, trimethylolpropane triacrylate, pentaerythritol tetracrylate, and dipentaerythritol pentacrylate; and
the photoinitiator comprises one or more selected from the group consisting of benzoin, benzoin dimethylether, deoxybenzoin, α-hydroxyalkylphenone, aroyl phosphine oxide, dibenzoylphenylphosphine oxide, benzophenone, 2,4-dihydroxybenzophenone, thiopropoxythioxanthone and isopropylthioxanthone.

### Claim 9 (depends on 5)

The method of producing the composition for overcoat layer of claim 5, wherein:
the epoxy group-containing acrylate resin comprises one or more selected from the group consisting of methyl acrylate-modified epoxy resin, methyl methacrylate-modified epoxy resin, ethyl acrylate-modified epoxy resin, ethyl methacrylate-modified epoxy resin, butyl acrylate-modified epoxy resin, butyl methacrylate-modified epoxy resin, acrylate copolymer-modified epoxy resin and methacrylatecopolymer-modified epoxy resin; and
the curing agent comprises one or more selected from the group consisting of maleic anhydride, phthalic anhydride, trimellitic anhydride and polyamide resin.

### Claim 10 (depends on 5)

The method of producing the composition for overcoat layer of claim 5, wherein the additive and the adjuvant are one or more selected from the group consisting of adhesion promotor and leveling agent, respectively.

### Claim 11 (depends on 7)

The display apparatus of claim 7, wherein the additive and the adjuvant are one or more selected from the group consisting of adhesion promotor and leveling agent, respectively.