CN111647311A - Light scattering ink composition, light scattering pixel, color filter, and image display device - Google Patents
Light scattering ink composition, light scattering pixel, color filter, and image display device Download PDFInfo
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- CN111647311A CN111647311A CN202010138254.5A CN202010138254A CN111647311A CN 111647311 A CN111647311 A CN 111647311A CN 202010138254 A CN202010138254 A CN 202010138254A CN 111647311 A CN111647311 A CN 111647311A
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- ink composition
- light
- scattering
- light scattering
- chemical formula
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- 238000000149 argon plasma sintering Methods 0.000 title claims abstract description 76
- 239000000203 mixture Substances 0.000 title claims abstract description 74
- 239000002245 particle Substances 0.000 claims abstract description 46
- 239000000126 substance Substances 0.000 claims abstract description 46
- 239000000178 monomer Substances 0.000 claims abstract description 19
- 150000001875 compounds Chemical class 0.000 claims description 48
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 11
- 125000002947 alkylene group Chemical group 0.000 claims description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 9
- 150000003254 radicals Chemical class 0.000 claims description 9
- 239000003999 initiator Substances 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 125000005156 substituted alkylene group Chemical group 0.000 claims description 6
- 125000000524 functional group Chemical group 0.000 claims description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 125000006577 C1-C6 hydroxyalkyl group Chemical group 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 4
- 238000000576 coating method Methods 0.000 abstract description 45
- 239000011248 coating agent Substances 0.000 abstract description 44
- 238000000034 method Methods 0.000 abstract description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 abstract description 7
- 238000007641 inkjet printing Methods 0.000 abstract description 2
- 239000000976 ink Substances 0.000 description 61
- 239000010408 film Substances 0.000 description 42
- 239000000758 substrate Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 20
- -1 n-propylene Chemical group 0.000 description 15
- 239000002096 quantum dot Substances 0.000 description 11
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- 238000005192 partition Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
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- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 4
- 230000037303 wrinkles Effects 0.000 description 4
- 125000004182 2-chlorophenyl group Chemical group [H]C1=C([H])C(Cl)=C(*)C([H])=C1[H] 0.000 description 3
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 3
- 239000012965 benzophenone Substances 0.000 description 3
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- MYWOJODOMFBVCB-UHFFFAOYSA-N 1,2,6-trimethylphenanthrene Chemical compound CC1=CC=C2C3=CC(C)=CC=C3C=CC2=C1C MYWOJODOMFBVCB-UHFFFAOYSA-N 0.000 description 2
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 2
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- GTELLNMUWNJXMQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical class OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.CCC(CO)(CO)CO GTELLNMUWNJXMQ-UHFFFAOYSA-N 0.000 description 2
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- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 2
- KNSXNCFKSZZHEA-UHFFFAOYSA-N [3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical class C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C KNSXNCFKSZZHEA-UHFFFAOYSA-N 0.000 description 2
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- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 1
- 125000000171 (C1-C6) haloalkyl group Chemical group 0.000 description 1
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
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- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 1
- PIZHFBODNLEQBL-UHFFFAOYSA-N 2,2-diethoxy-1-phenylethanone Chemical compound CCOC(OCC)C(=O)C1=CC=CC=C1 PIZHFBODNLEQBL-UHFFFAOYSA-N 0.000 description 1
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- UXCIJKOCUAQMKD-UHFFFAOYSA-N 2,4-dichlorothioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC(Cl)=C3SC2=C1 UXCIJKOCUAQMKD-UHFFFAOYSA-N 0.000 description 1
- BTJPUDCSZVCXFQ-UHFFFAOYSA-N 2,4-diethylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC(CC)=C3SC2=C1 BTJPUDCSZVCXFQ-UHFFFAOYSA-N 0.000 description 1
- QIRUERQWPNHWRC-UHFFFAOYSA-N 2-(1,3-benzodioxol-5-ylmethyl)-4,6-bis(trichloromethyl)-1,3,5-triazine Chemical compound ClC(Cl)(Cl)C1=NC(C(Cl)(Cl)Cl)=NC(CC=2C=C3OCOC3=CC=2)=N1 QIRUERQWPNHWRC-UHFFFAOYSA-N 0.000 description 1
- AZUHIVLOSAPWDM-UHFFFAOYSA-N 2-(1h-imidazol-2-yl)-1h-imidazole Chemical compound C1=CNC(C=2NC=CN=2)=N1 AZUHIVLOSAPWDM-UHFFFAOYSA-N 0.000 description 1
- GBOJZXLCJZDBKO-UHFFFAOYSA-N 2-(2-chlorophenyl)-2-[2-(2-chlorophenyl)-4,5-diphenylimidazol-2-yl]-4,5-diphenylimidazole Chemical compound ClC1=CC=CC=C1C1(C2(N=C(C(=N2)C=2C=CC=CC=2)C=2C=CC=CC=2)C=2C(=CC=CC=2)Cl)N=C(C=2C=CC=CC=2)C(C=2C=CC=CC=2)=N1 GBOJZXLCJZDBKO-UHFFFAOYSA-N 0.000 description 1
- FVNIIPIYHHEXQA-UHFFFAOYSA-N 2-(4-methoxynaphthalen-1-yl)-4,6-bis(trichloromethyl)-1,3,5-triazine Chemical compound C12=CC=CC=C2C(OC)=CC=C1C1=NC(C(Cl)(Cl)Cl)=NC(C(Cl)(Cl)Cl)=N1 FVNIIPIYHHEXQA-UHFFFAOYSA-N 0.000 description 1
- QRHHZFRCJDAUNA-UHFFFAOYSA-N 2-(4-methoxyphenyl)-4,6-bis(trichloromethyl)-1,3,5-triazine Chemical compound C1=CC(OC)=CC=C1C1=NC(C(Cl)(Cl)Cl)=NC(C(Cl)(Cl)Cl)=N1 QRHHZFRCJDAUNA-UHFFFAOYSA-N 0.000 description 1
- PUBNJSZGANKUGX-UHFFFAOYSA-N 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-(4-morpholin-4-ylphenyl)butan-1-one Chemical compound C=1C=C(N2CCOCC2)C=CC=1C(=O)C(CC)(N(C)C)CC1=CC=C(C)C=C1 PUBNJSZGANKUGX-UHFFFAOYSA-N 0.000 description 1
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- WQKFMWYHZGTEFC-UHFFFAOYSA-N 2-[3-(2,3-dichlorophenyl)-4,5-diphenyl-4H-imidazol-2-ylidene]-4,5-diphenylimidazole Chemical compound ClC1=C(C=CC=C1Cl)N1C(N=C(C1C1=CC=CC=C1)C1=CC=CC=C1)=C1N=C(C(=N1)C1=CC=CC=C1)C1=CC=CC=C1 WQKFMWYHZGTEFC-UHFFFAOYSA-N 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- HPAFOABSQZMTHE-UHFFFAOYSA-N phenyl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)C1=CC=CC=C1 HPAFOABSQZMTHE-UHFFFAOYSA-N 0.000 description 1
- LYXOWKPVTCPORE-UHFFFAOYSA-N phenyl-(4-phenylphenyl)methanone Chemical compound C=1C=C(C=2C=CC=CC=2)C=CC=1C(=O)C1=CC=CC=C1 LYXOWKPVTCPORE-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- MVQLEZWPIWKLBY-UHFFFAOYSA-N tert-butyl 2-benzoylbenzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1C(=O)C1=CC=CC=C1 MVQLEZWPIWKLBY-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
The present invention provides a light scattering ink composition, a light scattering pixel, a color filter formed using the light scattering ink composition, and an image display device having the color filter, the light scattering ink composition including a curable monomer and scattering particles, wherein the curable monomer includes a difunctional (meth) acrylate of a specific chemical formula and a tri-to tetrafunctional (meth) acrylate of a specific chemical formula at the same time in a specific mixing ratio. The light scattering ink composition exhibits excellent scattering particle dispersibility, thereby improving jetting characteristics and improving coating film hardness and coating film surface characteristics. Therefore, the above light-scattering ink composition can be effectively used for the purpose of producing a color filter by an inkjet printing method.
Description
Technical Field
The invention relates to a light scattering ink composition, a light scattering pixel, a color filter and an image display device. More particularly, the present invention relates to a light-scattering ink composition exhibiting excellent scattering particle dispersibility to improve ejection characteristics and to improve coating film hardness and coating film surface characteristics, a light-scattering pixel and a color filter formed using the light-scattering ink composition, and an image display device having the color filter.
Background
Color filters are widely used in image devices, liquid crystal devices, and the like, and their application range is gradually expanding.
In recent years, as one of methods for realizing color filters, a pigment dispersion method using a pigment-dispersible photosensitive resin has been employed. However, in the process of transmitting light irradiated from the light source through the color filter, a problem occurs in that a part of the light is absorbed by the color filter, so that light efficiency is lowered, and color reproducibility is lowered due to characteristics of pigments contained in the color filter.
In order to solve these problems, a color filter using quantum dots is proposed. For example, korean patent laid-open publication No. 10-2009-0036373 discloses that the display quality of a display device can be improved by increasing the light emission efficiency by using a light-emitting layer composed of a quantum dot fluorescent substance instead of a normal color filter.
However, in the case of a color filter including quantum dots, the efficiency of the quantum dots (especially, the efficiency of blue quantum dots) may be reduced, and thus the performance of the color filter may be slightly deteriorated. In addition, since the price of the blue quantum dot is high, there is a problem in that the overall manufacturing cost is increased.
Therefore, a color filter using a light source emitting blue light, having a red pattern layer containing red quantum dot particles and a green pattern layer containing green quantum dot particles, and having a transparent pattern layer not containing quantum dot particles at a position corresponding to the blue pattern layer, such that the red quantum dot particles emit red light, the green quantum dot particles emit green light, and the blue light directly transmits through the transparent pattern layer to display blue light, has been proposed.
The transparent pattern layer is mainly produced by photolithography using a photosensitive resin composition containing scattering particles. The photolithography method is a preparation method comprising the following steps: the light shielding material film is subjected to photolithography and development to form a partition wall pattern, a photosensitive resin is applied to the partition wall by a spin coating method, a slit coating method, or the like, and is patterned by photolithography and development, and then cured. This method has the advantage of a uniform thickness of the coated film. However, about 70% of the coating material used for forming the pattern is lost, and the cost required for installing an exposure apparatus, a developing apparatus, a curing device, and the like is high. In addition, it is difficult to manage productivity due to the long production line. In recent years, due to the increase in display material substrates, the cost for processing and mounting equipment is expected to increase more.
As an alternative to the above method, an inkjet method is proposed. The ink jet method is a technique for realizing a pattern by ejecting only an ink composition between openings of formed partition walls with an ink jet head, and can significantly reduce the manufacturing process, time, and cost. In the ink jet method using the ink composition, a specific amount of ink is ejected to the pixel openings between the partition walls, whereby a desired film thickness can be obtained.
However, a general ink composition is a solvent-based composition containing an appropriate amount of solvent to ensure ejection stability, and the film thickness becomes thin after curing although printing is performed with a uniform film thickness, so that there is a problem that the coating film hardness and surface characteristics are reduced.
Further, in the case of preparing the scattering particles in the form of a solvent-free composition, uniform dispersion is difficult, which may result in aggregation of the scattering particles. Therefore, the ejection characteristics are deteriorated due to the high viscosity.
Therefore, there is a need to develop an ink composition that exhibits excellent dispersion of scattering particles even without any solvent, thereby improving jetting characteristics, and has excellent coating film hardness and coating film surface characteristics.
Disclosure of Invention
Technical problem
An object of the present invention is to provide a light scattering ink composition which exhibits excellent scattering particle dispersibility to improve jetting characteristics, and has excellent coating film hardness and coating film surface characteristics.
Another object of the present invention is to provide a color filter formed of the light scattering ink composition.
Still another object of the present invention is to provide an image display device having the color filter.
Technical scheme
According to one aspect of the present invention, there is provided a light scattering ink composition comprising a curable monomer and scattering particles, wherein the curable monomer comprises a compound represented by the following chemical formula (1) and a compound represented by the following chemical formula (2), and a mixing ratio of the compound represented by the following chemical formula (1) to the compound represented by the following chemical formula (2) is 40:60 to 80:20 in percentage by weight.
Wherein,
R1is C1-C20An alkylene group or a substituted alkylene group,
R2is hydrogen or a methyl group,
m is an integer of 1 to 6,
R3is hydrogen, C1-C6Alkyl radical, C1-C6Hydroxyalkyl group, hydroxyl group or functional group represented by the following chemical formula (3),
R4is hydrogen or a methyl group,
R5is C1-C20Alkylene, phenylene or C3-C10A cycloalkylene group,
l is absent or is C1-C6An alkylene group or a substituted alkylene group,
p, q, r and n are each independently an integer of 0 to 5,
t is 0 or 1.
In one embodiment of the present invention, the curable monomer may be contained in an amount of 50 to 95 wt% based on 100 wt% of the entire light scattering ink composition.
In one embodiment of the present invention, the scattering particles may include TiO2。
In one embodiment of the present invention, the content of the scattering particles may be 1 to 20 wt% based on 100 wt% of the entire light scattering ink composition.
The light scattering ink composition according to an embodiment of the present invention may further include a photopolymerization initiator.
The light scattering ink composition according to an embodiment of the present invention may be solvent-free.
According to another aspect of the present invention, there is provided a light-scattering pixel comprising a cured product of the above light-scattering ink composition.
According to yet another aspect of the present invention, there is provided a color filter including the above light scattering pixel.
According to still another aspect of the present invention, there is provided an image display device including the color filter.
Advantageous effects
The light scattering ink composition of the present invention includes both difunctional (meth) acrylate of a specific chemical formula and tri-to tetrafunctional (meth) acrylate of a specific chemical formula at a specific mixing ratio, and thus exhibits excellent scattering particle dispersibility even without any solvent, thereby improving jetting characteristics, coating film hardness and coating film surface characteristics. Therefore, the light-scattering ink composition of the present invention can be effectively used for the purpose of preparing a color filter by an inkjet printing method.
Detailed Description
Hereinafter, the present invention will be described in more detail.
One embodiment of the present invention relates to a light scattering ink composition comprising a curable monomer (a) and scattering particles (B), wherein the curable monomer (a) simultaneously comprises a difunctional (meth) acrylate of a specific formula and a tri-to tetrafunctional (meth) acrylate of a specific formula at a specific mixing ratio.
Curable monomer (A)
In one embodiment of the present invention, the curable monomer (a) includes a compound represented by the following chemical formula (1) and a compound represented by the following chemical formula (2).
Wherein,
R1is C1-C20An alkylene group or a substituted alkylene group,
R2is hydrogen or a methyl group,
m is an integer of 1 to 6,
R3is hydrogen, C1-C6Alkyl radical, C1-C6Hydroxyalkyl group, hydroxyl group or functional group represented by the following chemical formula (3),
R4is hydrogen or a methyl group,
R5is C1-C20Alkylene, phenylene or C3-C10A cycloalkylene group,
l is absent or is C1-C6An alkylene group or a substituted alkylene group,
p, q, r and n are each independently an integer of 0 to 5,
t is 0 or 1.
In this specification, C1-C20The alkylene group means a linear or branched divalent hydrocarbon group having 1 to 20 carbon atoms, and examples thereof may include methylene, ethylene, n-propylene, isopropylene, n-butylene, isobutylene, n-pentylene, n-hexylene, n-heptylene, n-octylene, n-nonylene, and the like, but are not limited thereto.
In this specification, C3-C10The cycloalkylene group means a monocyclic or fused divalent hydrocarbon group having 3 to 10 carbon atoms, and examples thereof include, but are not limited to, cyclopropylene, cyclobutylene, cyclopentylene, cyclohexylene, and the like.
In this specification, C1-C6The alkyl group means a linear or branched monovalent hydrocarbon group having 1 to 6 carbon atoms, and examples thereof include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, and the like.
In this specification, C1-C6The hydroxyalkyl group means a linear or branched hydrocarbon group having 1 to 6 carbon atoms substituted with a hydroxyl group, and examples thereof include, but are not limited to, hydroxymethyl, hydroxyethyl, hydroxypropyl and the like.
In this specification, C1-C6The alkylene group means a linear or branched divalent hydrocarbon group having 1 to 6 carbon atoms, and examples thereof include, but are not limited to, methylene, ethylene, propylene, butylene, and the like.
C1-C20Alkylene, phenylene, C3-C10Cycloalkylene radical, C1-C6Alkyl radical, C1-C6Hydroxyalkyl and C1-C6One or more hydrogen atoms in the alkylene radical may be replaced by C1-C6Alkyl radical, C2-C6Alkenyl radical, C2-C6Alkynyl, C3-C10Cycloalkyl radical, C3-C10Heterocycloalkyl radical, C3-C10Heterocyclic alkoxy radical, C1-C6Haloalkyl, C1-C6Alkoxy radical, C1-C6Thioalkoxy, aryl, acyl, hydroxy, thio, halogen, amino, alkoxycarbonyl, carboxy, carbamoyl, cyano, nitro and the like.
In one embodiment of the present invention, R1Can be C1-C20Alkylene, preferably C1-C12An alkylene group. When R is1Is C1-C20In the case of alkylene, the scattering particles are excellent even without a solventThe dispersibility of (b) improves the ejection characteristics and enables to improve the hardness and surface characteristics of the coating film.
In one embodiment of the present invention, m is an integer of 1 to 6, preferably 1 to 3. If m is larger than the above range, the ejection characteristics may be deteriorated due to high viscosity.
In one embodiment of the present invention, p, q, r and n are integers of 0 to 5, preferably 0 to 3. If p, q, r and n are greater than the above range, the injection characteristics may be degraded due to high viscosity.
In one embodiment of the present invention, R3Is hydrogen, methyl, ethyl, hydroxymethyl, hydroxyl or a functional group represented by the following chemical formula (3).
Wherein,
R4is hydrogen or a methyl group,
R5is an ethylene group, and is characterized in that,
l is absent or is a methylene group,
p, q, r and n are each independently an integer of 0 to 2,
t is 0 or 1.
The compound represented by the above chemical formula (1) plays a role in improving the dispersibility of the scattering particles in the ink composition and thus improving the ejection characteristics.
Specific examples of the compound represented by the above chemical formula (1) may include 1, 6-hexanediol diacrylate, 1, 9-bisacryloxyanonane, tripropylene glycol diacrylate and the like.
The compound represented by the above chemical formula (2) can improve the hardness of the coating film and suppress the occurrence of wrinkles on the surface of the coating film when used in a specific mixing ratio with the compound represented by the chemical formula (1).
Specific examples of the compound represented by the above chemical formula (2) may include ethoxylated pentaerythritol tetraacrylate (EO 4mol) (NK ESTER ATM-4E, New Zhongcun chemical Co.), a blend (molar ratio, 0.6:0.4) of pentaerythritol triacrylate and pentaerythritol tetraacrylate (A-TMM-3LM-N, New Zhongcun chemical Co.), ethoxylated trimethylolpropane triacrylate (EO 3mol) (A-TMPT-3EO, New Zhongcun chemical Co.), ethoxylated glycerol triacrylate (EO6mol) (A-GLY-6E, New Zhongcun chemical Co.), and the like.
In one embodiment of the present invention, the mixing ratio of the compound represented by chemical formula (1) to the compound represented by chemical formula (2) is 40:60 to 80:20 in percentage by weight. If the mixing ratio of the compound represented by chemical formula (1) to the compound represented by chemical formula (2) is in the above range, the coating film has excellent hardness and the occurrence of wrinkles on the surface of the coating film can be suppressed. With respect to the mixing ratio of the compound represented by chemical formula (1) and the compound represented by chemical formula (2), if the amount of the compound represented by chemical formula (1) is less than the above range, the dispersibility of the scattering particles is lowered and the ejection characteristics may be deteriorated. If the amount of the compound represented by chemical formula (1) is more than the above range, wrinkles may occur on the surface of the coating film.
The content of the curable monomer (a) may be 50 to 95 wt%, preferably 60 to 95 wt%, based on 100 wt% of the entire light-scattering ink composition. If the content of the curable monomer is less than 60 wt%, the dispersibility of the scattering particles may be reduced. If the content is more than 95 wt%, the scattering effect may be deteriorated.
Scattering particles (B)
In an embodiment of the present invention, the scattering particles increase a path of light emitted from the blue light source to improve the overall light efficiency.
As the scattering particles, a general inorganic material can be used. Preferably, metal oxides can be used.
The metal oxide may Be an oxide containing one metal selected from the group consisting of Li, Be, B, Na, Mg, Al, Si, K, Ca, Sc, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Mo, Cs, Ba, La, Hf, W, Tl, Pb, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Ti, Sb, Sn, Zr, Nb, Ce, Ta, In, and combinations thereof, but is not limited thereto.
In particular, can be selected fromFrom Al2O3、SiO2、ZnO、ZrO2、BaTiO3、TiO2、Ta2O5、Ti3O5、ITO、IZO、ATO、ZnO-Al、Nb2O3SnO, MgO, and combinations thereof. If necessary, a material surface-treated with a compound having an unsaturated bond such as acrylate may be used.
The scattering particles may have an average particle diameter of 30 to 1,000nm, preferably 100 to 500nm, and more preferably 150 to 300 nm. If the particle size is too small, a sufficient scattering effect of light emitted from the blue light source cannot be expected. In contrast, if the particle size is too large, the particles settle in the composition or a surface of the light scattering layer of uniform quality cannot be obtained. Therefore, the particle size is suitably controlled to be within the above range.
The content of the scattering particles may be 1 to 20 wt% based on 100 wt% of the entire light scattering ink composition. If the content of the scattering particles is less than 1 wt%, the scattering effect may be deteriorated. If the content is more than 20 wt%, the transmittance of the light scattering layer may be reduced.
Photopolymerization initiator (C)
The light scattering ink composition according to an embodiment of the present invention may further include a photopolymerization initiator (C).
In one embodiment of the present invention, the photopolymerization initiator (C) is not particularly limited as long as it can polymerize the curable monomer. In particular, from the viewpoints of polymerization characteristics, initiation efficiency, absorption wavelength, availability, cost, and the like, it is preferable to use at least one compound selected from the group consisting of acetophenone-based compounds, benzophenone-based compounds, triazine-based compounds, bisimidazole-based compounds, oxime-based compounds, and thioxanthone-based compounds as the photopolymerization initiator (C).
Specific examples of the above acetophenone-based compound include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzildimethyl ketal, 2-hydroxy-1- [4- (2-hydroxyethoxy) phenyl ] -2-methylpropan-1-one, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1- (4-methylphenylsulfanyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butan-1-one, 2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl ] propan-1-one, and the like, 2- (4-methylbenzyl) -2- (dimethylamino) -1- (4-morpholinophenyl) butan-1-one, and the like.
Specific examples of the above benzophenone-based compound include benzophenone, methyl benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4 ' -methyldiphenyl sulfide, 3',4,4' -tetrakis (t-butylperoxycarbonyl) benzophenone, 2,4, 6-trimethylbenzophenone and the like.
Specific examples of the triazine compounds include 2, 4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3, 5-triazine, 2, 4-bis (trichloromethyl) -6- (4-methoxynaphthyl) -1,3, 5-triazine, 2, 4-bis (trichloromethyl) -6-piperonyl-1, 3, 5-triazine, 2, 4-bis (trichloromethyl) -6- (4-methoxystyryl) -1,3, 5-triazine, 2, 4-bis (trichloromethyl) -6- [2- (5-methylfuran-2-yl) ethylene ] -1,3, 5-triazine, 2, 4-bis (trichloromethyl) -6- [2- (furan-2-yl) ethylene 1,3, 5-triazine, 2, 4-bis (trichloromethyl) -6- [2- (4-diethylamino-2-methylphenyl) ethylene ] -1,3, 5-triazine, 2, 4-bis (trichloromethyl) -6- [2- (3, 4-dimethoxyphenyl) ethylene ] -1,3, 5-triazine, and the like.
Specific examples of the above biimidazole-based compound include 2,2' -bis (2-chlorophenyl) -4,4',5,5' -tetraphenylbiimidazole, 2' -bis (2, 3-dichlorophenyl) -4,4',5,5' -tetraphenylbiimidazole, 2' -bis (2-chlorophenyl) -4,4',5,5' -tetrakis (alkoxyphenyl) biimidazole, 2,2 '-bis (2-chlorophenyl) -4,4',5,5 '-tetrakis (trialkoxyphenyl) biimidazole, 2-bis (2, 6-dichlorophenyl) -4,4',5,5 '-tetraphenyl-1, 2' -biimidazole, imidazole compounds in which the phenyl group at the 4,4',5,5' position is substituted with an alkoxycarbonyl group, and the like. Among them, 2' -bis (2-chlorophenyl) -4,4',5,5' -tetraphenyl biimidazole, 2' -bis (2, 3-dichlorophenyl) -4,4',5,5' -tetraphenyl biimidazole and 2, 2-bis (2, 6-dichlorophenyl) -4,4',5,5' -tetraphenyl-1, 2' -biimidazole are preferably used.
Specific examples of the above oxime-based compounds include o-ethoxycarbonyl- α -oxyimino-1-phenylpropan-1-one and the like, and commercially available products typically include Irgacure OXE 01 and OXE 02 of BASF.
The thioxanthone-based compound includes 2-isopropylthioxanthone, 2, 4-diethylthioxanthone, 2, 4-dichlorothioxanthone, 1-chloro-4-propoxythioxanthone, and the like.
The content of the photopolymerization initiator (C) may be 2 to 20 wt% based on 100 wt% of the entire light-scattering ink composition. If the content of the photopolymerization initiator is less than 2 wt%, the hardness of the coating film may be reduced. If the content is more than 20 wt%, yellowing of the coating film may occur.
Additive (D)
In addition to the above components, the light scattering ink composition according to an embodiment of the present invention may further include additives such as a surfactant and an adhesion promoter to improve the smoothness or adhesion characteristics of the coating film.
When the light scattering ink composition of the present invention contains a surfactant, the smoothness of the coating film can be improved. The surfactant may be, for example, a fluorine-based surfactant such as BM-1000, BM-1100(BM chemical), Fluorad FC-135/FC-170C/FC-430 (Sumitomo 3M Co.), SH-28PA/-190/-8400/SZ-6032 (Toray Silicone Co.), etc., but is not limited thereto.
The adhesion promoter may be added to improve adhesion to the substrate, and may include a silane coupling agent having a reactive substituent selected from the group consisting of a carboxyl group, a methacryloxy group, an isocyanate group, an epoxy group, and a combination thereof, but is not limited thereto. For example, the silane coupling agent may include trimethoxysilylbenzoic acid, gamma-methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, vinyltrimethoxysilane, gamma-isocyanatopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, beta- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, and the like.
The light scattering ink composition of the present invention may further contain additives such as an antioxidant, an ultraviolet absorber, and an anti-coagulant, within a range not to impair the effects of the present invention. The above-mentioned additives can be appropriately added by those skilled in the art within a range not to impair the effects of the present invention.
The amount of the additive may be 0.05 to 10 wt%, specifically 0.1 to 10 wt%, more specifically 0.1 to 5 wt%, based on 100 wt% of the entire light-scattering ink composition, but is not limited thereto.
The light scattering ink composition according to an embodiment of the present invention is a solvent-free composition containing no solvent, but exhibits excellent scattering particle dispersibility and can realize a low viscosity.
In addition, the light scattering ink composition according to one embodiment of the present invention contains substantially no resin component. Even if the resin component is contained, the content thereof is 0.5 wt% or less based on 100 wt% of the whole light scattering ink composition. The light scattering ink composition according to an embodiment of the present invention does not contain a resin component, and thus can realize a low viscosity, thereby having excellent ink jet characteristics.
One embodiment of the present invention relates to a light-scattering pixel (i.e., a transparent pixel) including a cured product of the light-scattering ink composition.
In addition, an embodiment of the present invention relates to a color filter including the light scattering pixel.
The method of forming a pattern of the light scattering ink composition of the present invention comprises: a step of applying the light scattering ink composition to a predetermined region by an inkjet method; a step of curing the coated light scattering ink composition.
First, the light scattering ink composition of the present invention is injected into an inkjet device and printed to a predetermined region of a substrate.
The substrate is not limited, and examples thereof include substrates having a flat surface such as a glass substrate, a silicon substrate, a polycarbonate substrate, a polyester substrate, an aromatic polyamide substrate, a polyamide-imide substrate, a polyimide substrate, an Al substrate, and a GaAs substrate. These substrates may be subjected to pretreatment such as chemical treatment by chemicals such as silane coupling agents, plasma treatment, ion plating treatment, sputtering treatment, vapor reaction treatment, and vacuum deposition treatment. When a silicon substrate or the like is used as the substrate, a Charge Coupled Device (CCD), a thin film diode (TFT), or the like may be formed on the surface of the silicon substrate or the like. Further, a partition matrix may be formed.
In order to form a suitable phase on a substrate by ejecting from a head of a piezoelectric inkjet printer, which is an example of an inkjet device, properties such as viscosity, fluidity, scattering particles, and the like should be adapted to the inkjet head. The piezoelectric inkjet head used in the present invention is not limited as long as the droplet size of the ejected ink is about 10 to 100pL, preferably about 20 to 40 pL.
The viscosity of the light scattering ink composition of the present invention is preferably about 3 to 30cP, and more preferably controlled in the range of 7 to 20 cP.
The color filter of an embodiment of the present invention includes a transparent pattern layer (i.e., a transparent pixel layer) formed by the above pattern forming method. In other words, the color filter described above is characterized by including a transparent pixel layer formed by applying the light scattering ink composition described above onto a substrate in a predetermined pattern and then curing the applied composition. Since the constitution and the preparation method of the color filter are known in the art, a detailed description thereof is omitted.
An embodiment of the present invention relates to an image display device having the color filter as described above.
The color filter of the present invention can be applied not only to a general liquid crystal display device (LCD) but also to various image display devices such as an electroluminescence display device (EL), a plasma display device (PDP), a field emission display device (FED), and an Organic Light Emitting Device (OLED).
The image display device of the present invention includes a configuration known in the art in addition to the color filter as described above.
Hereinafter, the present invention will be described in more detail by examples, comparative examples and experimental examples. However, these examples, comparative examples and experimental examples are for illustrative purposes only, and it is obvious to those skilled in the art that the scope of the present invention is not limited thereto.
Preparation example 1: preparation of Dispersion of scattering particles (A1)
TiO as scattering particles with a particle size of 210nm2(CR-63, Shinyuan Co.) 70.0 parts by weightDISPERBYK-2001(BYK corporation), 4.0 parts by weight of a dispersant, and 26 parts by weight of 1, 6-hexanediol diacrylate as a solvent were mixed, and dispersed for 12 hours using a bead mill to prepare a scattering particle dispersion (a 1).
Examples and comparative examples: preparation of light-scattering ink composition
The respective components shown in the following table 1 were mixed to prepare a light scattering ink composition (unit: wt%).
[ Table 1]
A1: scattering particles prepared in preparation example 1
B1: 1, 6-hexanediol diacrylate (Sigma-Aldrich Co.)
B2: 1, 9-bisacryloxy nonane (TCI Co., Ltd.)
B3: tripropylene glycol diacrylate (Sigma-Aldrich Co.)
B4: ethoxylated pentaerythritol tetraacrylate (EO 4mol) (NK ESTER ATM-4E, New Zhongcun chemical Co., Ltd.)
B5: blend of pentaerythritol triacrylate and pentaerythritol tetraacrylate (molar ratio, 0.6:0.4) (A-TMM-3LM-N, Ningzhongcun chemical Co., Ltd.)
B6: ethoxylated trimethylolpropane triacrylate (EO 3mol) (A-TMPT-3EO, Xinzhongcun chemical Co., Ltd.)
B7: ethoxylated Glycerol triacrylate (EO6mol) (A-GLY-6E, Xinzhongcun chemical Co., Ltd.)
B8: blend of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (molar ratio, 1:1) (A-9550, Ningzhongcun chemical Co., Ltd.)
B9: isobornyl acrylate (Sigma-Aldrich Co.)
B10: a compound of the following formula (a)
C1: irgacure OXE-01 (Basff corporation)
D1: SH8400 (Dow Kangning Dongli organosilicon Co., Ltd.)
Experimental example:
physical properties of the light scattering ink compositions prepared in examples and comparative examples were evaluated by the following methods, and the results are shown in table 2 below.
< preparation of light-scattering coating >
Each of the light-scattering ink compositions prepared in examples and comparative examples was applied by an ink-jet method onto a glass substrate of 5cm × 5cm, and as a UV light source, a 1KW high-pressure mercury vapor lamp containing all g, h and i lines at 1,000mJ/cm was used2The irradiation was performed, and then heated at 180 ℃ for 30 minutes in a heating oven, thereby preparing a light scattering coating.
(1) Dispersibility
The light-scattering ink composition was prepared, and the liquid sample was confirmed by naked eyes and evaluated according to the following evaluation criteria.
< evaluation criteria >
○ No TiO was observed on the wall and bottom of the vial2Particles
× agglomerated TiO was observed on the wall and bottom of the vial2Particles
(2) Jetting characteristics
The ejection characteristics of the inks were evaluated using an inkjet drop analyzer according to the following evaluation criteria.
< evaluation criteria >
O: the nozzles of the ink jet are not blocked and the direction of the ejected ink drops is linear
X: clogging of nozzles of ink-jet machines, or direction of ejected ink droplets not being straight
(3) Hardness of coating film
After the heating step (180 ℃/30 minutes), the coating hardness characteristics were confirmed as pencil hardness. The pencil hardness was measured using a pencil hardness tester (Korea Sukbo science) according to JIS K5400, 5600. The pencil was set to a hardness of 6B to 6H, which was manufactured by mitsubishi corporation. First, the indentation or scratch was visually confirmed, and when the number of occurrences of indentation or scratch was less than 2 in 5 measurements, it was confirmed as OK. The maximum hardness confirmed as OK represents the coating hardness.
(4) Surface characteristics of coating film
After the heating step (180 ℃/30 minutes), the surface of the coating film was observed with an optical microscope, and the surface characteristics of the coating film were evaluated according to the following evaluation criteria.
< evaluation criteria >
O: no wrinkles appear on the surface of the coating film
X: the surface of the coating film is wrinkled
[ Table 2]
| Dispersibility | Jetting characteristics | Hardness of coating film | Surface characteristics of coating film | |
| Example 1 | ○ | ○ | 2H | ○ |
| Example 2 | ○ | ○ | 2H | ○ |
| Example 3 | ○ | ○ | 2H | ○ |
| Example 4 | ○ | ○ | 2H | ○ |
| Example 5 | ○ | ○ | 2H | ○ |
| Example 6 | ○ | ○ | 2H | ○ |
| Example 7 | ○ | ○ | 2H | ○ |
| Example 8 | ○ | ○ | 2H | ○ |
| Comparative example 1 | ○ | ○ | 3B | × |
| Comparative example 2 | × | × | 3H | × |
| Comparative example 3 | × | × | 2H | × |
| Comparative example 4 | ○ | ○ | 3B | × |
| Comparative example 5 | × | × | 4H | × |
| Comparative example 6 | ○ | ○ | 5B | × |
| Comparative example 7 | × | × | 2H | ○ |
As shown in table 2 above, it was confirmed that the light-scattering ink compositions of examples 1 to 8 of the present invention, which comprise the compound represented by chemical formula (1) and the compound represented by chemical formula (2) at a specific mixing ratio, exhibited excellent scattering particle dispersibility, thereby having improved jetting characteristics, and exhibited excellent coating film hardness and coating film surface characteristics. On the other hand, in the case of the light scattering ink compositions of comparative examples 1 to 7, at least one of dispersibility, jetting property, coating film hardness and coating film surface property was not good.
Specifically, the light scattering ink composition of comparative example 1 containing the compound represented by chemical formula (1) but not containing the compound represented by chemical formula (2) as the curable monomer and comparative example 4 containing the compound represented by chemical formula (1) in a large amount out of the range of 40:60 to 80:20 are not good in terms of coating film hardness and coating film surface characteristics. Further, the light scattering ink composition of comparative example 2 containing the compound represented by chemical formula (2) but not containing the compound represented by chemical formula (1) as a curable monomer and comparative example 3 containing the compound represented by chemical formula (1) in a small amount out of the range of 40:60 to 80:20 are not excellent in dispersibility, ejection characteristics and coating film surface characteristics. Further, the light-scattering ink composition of comparative example 5, which contained a curable monomer having 5 or more functional groups without the compound represented by chemical formula (2), was not good in terms of dispersibility, ejection characteristics and coating film surface characteristics, and the light-scattering ink composition of comparative example 6, which contained a monofunctional curable monomer without the compound represented by chemical formula (2), was not good in terms of coating film hardness and coating film surface characteristics. Further, in the case of the light scattering ink composition of comparative example 7 containing the compound represented by chemical formula (1) in which m is greater than 6, it was confirmed that the dispersibility and the ejection characteristics were deteriorated.
While certain aspects of the invention have been described in detail, it will be apparent to those skilled in the art that this specific disclosure is a preferred embodiment only, and the scope of the invention is not limited thereto. In addition, various applications and modifications can be made by those skilled in the art based on the above description without departing from the scope and spirit of the present invention.
Accordingly, the substantial scope of the present invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A light-scattering ink composition comprising a curable monomer and scattering particles,
wherein the curable monomer comprises a compound represented by the following chemical formula (1) and a compound represented by the following chemical formula (2), and the mixing ratio of the compound represented by the following chemical formula (1) to the compound represented by the following chemical formula (2) is 40:60 to 80:20 in percentage by weight,
wherein,
R1is C1-C20An alkylene group or a substituted alkylene group,
R2is hydrogen or a methyl group,
m is an integer of 1 to 6,
R3is hydrogen, C1-C6Alkyl radical, C1-C6Hydroxyalkyl group, hydroxyl group or functional group represented by the following chemical formula (3),
R4is hydrogen or a methyl group,
R5is C1-C20Alkylene, phenylene or C3-C10A cycloalkylene group,
l is absent or is C1-C6An alkylene group or a substituted alkylene group,
p, q, r and n are each independently an integer of 0 to 5,
t is 0 or 1.
2. The light-scattering ink composition according to claim 1, wherein the curable monomer is contained in an amount of 50 to 95 wt% based on 100 wt% of the entire light-scattering ink composition.
3. The light scattering ink composition of claim 1, wherein the scattering particles comprise TiO2。
4. The light-scattering ink composition according to claim 1, wherein the content of the scattering particles is 1 to 20 wt% based on 100 wt% of the entire light-scattering ink composition.
5. The light-scattering ink composition of claim 1, further comprising a photopolymerization initiator.
6. The light scattering ink composition of claim 1, which is solvent free.
7. A light-scattering pixel comprising a cured product of the light-scattering ink composition according to any one of claims 1 to 6.
8. A color filter comprising the light-scattering pixel of claim 7.
9. An image display device provided with the color filter according to claim 8.
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| KR1020190180089A KR102737423B1 (en) | 2019-03-04 | 2019-12-31 | Light Scattering Ink Composition, Color Filter and Display Device |
| KR10-2019-0180089 | 2019-12-31 |
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