CN112759976A - Touch screen conductive circuit protection ink and preparation method and construction process thereof - Google Patents
Touch screen conductive circuit protection ink and preparation method and construction process thereof Download PDFInfo
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- CN112759976A CN112759976A CN201911064835.2A CN201911064835A CN112759976A CN 112759976 A CN112759976 A CN 112759976A CN 201911064835 A CN201911064835 A CN 201911064835A CN 112759976 A CN112759976 A CN 112759976A
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- acrylic resin
- touch screen
- protective ink
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 238000010276 construction Methods 0.000 title abstract description 7
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 43
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 43
- 239000011521 glass Substances 0.000 claims abstract description 30
- 239000004593 Epoxy Substances 0.000 claims abstract description 26
- 239000002253 acid Substances 0.000 claims abstract description 22
- 238000005530 etching Methods 0.000 claims abstract description 18
- 239000004814 polyurethane Substances 0.000 claims abstract description 17
- 229920002635 polyurethane Polymers 0.000 claims abstract description 17
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 239000007822 coupling agent Substances 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims abstract description 10
- 239000000049 pigment Substances 0.000 claims abstract description 10
- 238000001723 curing Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 38
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Inorganic materials [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 16
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000007650 screen-printing Methods 0.000 claims description 7
- VVBLNCFGVYUYGU-UHFFFAOYSA-N 4,4'-Bis(dimethylamino)benzophenone Chemical compound C1=CC(N(C)C)=CC=C1C(=O)C1=CC=C(N(C)C)C=C1 VVBLNCFGVYUYGU-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000013530 defoamer Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 5
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229910021485 fumed silica Inorganic materials 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- GUCYFKSBFREPBC-UHFFFAOYSA-N [phenyl-(2,4,6-trimethylbenzoyl)phosphoryl]-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C(=O)C1=C(C)C=C(C)C=C1C GUCYFKSBFREPBC-UHFFFAOYSA-N 0.000 claims description 3
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 3
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 3
- 239000012965 benzophenone Substances 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 238000005562 fading Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000004200 microcrystalline wax Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000013618 particulate matter Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 235000013799 ultramarine blue Nutrition 0.000 claims description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims 3
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 claims 1
- LWRBVKNFOYUCNP-UHFFFAOYSA-N 2-methyl-1-(4-methylsulfanylphenyl)-2-morpholin-4-ylpropan-1-one Chemical compound C1=CC(SC)=CC=C1C(=O)C(C)(C)N1CCOCC1 LWRBVKNFOYUCNP-UHFFFAOYSA-N 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000000016 photochemical curing Methods 0.000 abstract 1
- 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 11
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Substances CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001029 thermal curing Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- MYWOJODOMFBVCB-UHFFFAOYSA-N 1,2,6-trimethylphenanthrene Chemical compound CC1=CC=C2C3=CC(C)=CC=C3C=CC2=C1C MYWOJODOMFBVCB-UHFFFAOYSA-N 0.000 description 1
- 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 1
- JHWGFJBTMHEZME-UHFFFAOYSA-N 4-prop-2-enoyloxybutyl prop-2-enoate Chemical compound C=CC(=O)OCCCCOC(=O)C=C JHWGFJBTMHEZME-UHFFFAOYSA-N 0.000 description 1
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 1
- 241001128004 Demodex Species 0.000 description 1
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Materials For Photolithography (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention particularly relates to UV photosensitive touch screen conducting circuit protection ink and a preparation method and a construction process thereof, wherein the ink is prepared by the following method: at the temperature of 20-35 ℃, 150-500 parts of epoxy acrylic resin, 200-400 parts of polyurethane acrylic resin, 50-200 parts of active monomer, 50-100 parts of photoinitiator, 1-10 parts of defoaming agent, 150-300 parts of coupling agent, 150-300 parts of filler and 0-5 parts of pigment are stirred, mixed uniformly and ground to prepare the ink. The ink can be directly screen-printed on a conductive film or ITO glass, and the conductive circuit of the touch screen can be manufactured after processes such as photocuring, acid etching, alkali stripping and the like, and the ink has the characteristics of simple preparation process, low cost, environmental friendliness, high curing speed, good film forming property, acid etching solution resistance, easiness in alkali stripping and no residue after stripping.
Description
Technical Field
The invention belongs to the technical field of protective ink, and particularly relates to protective ink for a conductive circuit of a touch screen, and a preparation method and a construction process of the protective ink.
Background
With the rapid development of electronic technology, touch screens are increasingly widely used. The touch screen is a man-machine interface capable of operating the electronic equipment through the display screen, allows a user to perform direct touch control on the interface, has the advantages of intuition, simplicity and quickness, and is widely applied to the fields of smart phones, tablet computers and the like.
The touch screen comprises a protective cover plate. The middle part of the protective cover plate is a display area, and bottom covering ink coated on the periphery of the display area forms a shielding area surrounding the display area to shield an internal circuit of the touch screen. In order to reduce the thickness of the touch screen and save materials, transparent conductive circuits can be arranged on the inner surface of the protective cover plate and in the display area, so that the protective cover plate has the function of a touch sensor. Meanwhile, conductive leads are arranged on one side, away from the protective cover plate, of the bottom ink of the shielding area and are connected with the transparent conductive circuit, and the conductive leads are used for transmitting sensing signals generated by the transparent conductive circuit to a processor for analysis and processing.
The existing method for manufacturing the conductive circuit of the display area of the touch screen comprises the following steps: coating photosensitive ink on the conductive film or the glass by adopting one mode of screen printing, spin coating or roller coating; and exposing, developing, etching and removing photoresist on the conductive film or glass coated with the photosensitive ink to realize the manufacture of the peripheral conductive circuit of the visible area, and the preparation process is complex and has high cost. In another preparation method, a thermal curing ink is directly adopted, but the thermal curing ink contains a large amount of organic solvents such as benzene, toluene, butanone, ethyl acetate and the like, and the volatilized solvents pollute the air and cause environmental pollution.
Disclosure of Invention
Based on the problems, the invention aims to provide the touch screen conductive circuit protection ink which is simple in process, low in cost, green and environment-friendly, high in curing speed, good in film forming property, resistant to acid etching solution, easy to remove a film by alkali and free of residues after film removal and the preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a touch screen conductive circuit protection ink comprises the following components in parts by weight: 150-500 parts of epoxy acrylic resin, 200-400 parts of polyurethane acrylic resin, 50-200 parts of active monomer, 50-100 parts of photoinitiator, 1-10 parts of defoaming agent, 150-300 parts of coupling agent, 150-300 parts of filler and 0-5 parts of pigment.
Preferably, the epoxy resin is a modified epoxy acrylic resin with the weight-average molecular weight of 1000-100000 and the acid value of 60-240 mgKOH/g.
More preferably, the acid value of the epoxy resin is 80-200 mg KOH/g.
Preferably, the reactive monomer is one or more of difunctional acrylate, trifunctional acrylate and multifunctional acrylate.
Preferably, the photoinitiator is any one or a mixture of more than one of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-acetone, 2-methyl-1- [ 4-methylthiophenyl ] -2-morpholinyl-1-acetone, 1-hydroxycyclohexyl phenyl ketone, benzophenone, Michler's ketone.
Preferably, the defoamer is a silicone defoamer.
Preferably, the coupling agent is a silane coupling agent.
Preferably, the filler is one or more of fumed silica, polytetrafluoroethylene micro-wax powder, barium sulfate and talcum powder.
Preferably, the pigment is any one of iron blue, ultramarine blue, cobalt blue or phthalocyanine blue.
The preparation method of the UV photosensitive touch screen display area conducting wire protection ink comprises the following steps:
(1) adding epoxy acrylic resin, polyurethane acrylic resin, an active monomer, a photoinitiator, a defoaming agent and a coupling agent in proportion at the temperature of 20-35 ℃, and then stirring and mixing uniformly;
(2) adding the filler and the pigment according to the proportion, and continuously stirring until the mixture is uniformly mixed and no particulate matter can be seen by naked eyes;
(3) and grinding the slurry to the fineness of 3-5 microns by using a three-roll grinder, and discharging to obtain the conductive circuit protection ink for the display area of the UV photosensitive touch screen.
The UV photosensitive touch screen display area conducting circuit protection ink has the following construction process:
(1) printing UV photosensitive protective ink on a conductive film or ITO glass by screen printing;
(2) curing the UV photosensitive protective ink under the irradiation of an ultraviolet light source;
(3) the conductive film or glass firstly passes through an acid etching area, the etching solution is soaked in the conductive film or glass, the conductive layer is etched by the etching solution at a place where the conductive film or glass is not covered by the protection ink, then the conductive film or glass passes through an alkali fading area, 4% sodium hydroxide solution is soaked in the conductive film or glass to dissolve the protection ink, and finally the conductive circuit of the display area of the touch screen is manufactured after washing and drying.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the protective ink disclosed by the invention is solvent-free, free of VOC (volatile organic compounds) emission and environment-friendly.
2. The protective ink disclosed by the invention is UV sensitive, and has the advantages of high curing speed, good film forming property and high production efficiency.
3. The protective ink has good thixotropy, clear printing lines and high printing precision, and can print 100um patterns.
4. The protective ink does not need to be developed, and the process flow is simplified.
5. The protective ink can play a role in protecting during acid etching, and can protect circuits covered by the ink from being intact and not causing circuit shortage or saw-tooth shape; when the alkali fades, the protective ink can be easily removed, and no residue can be generated on the touch screen. Can improve the production efficiency, reduce the loss of raw materials and reduce the rework rate, and is particularly suitable for semi-automatic and full-automatic mass production.
Detailed Description
The following describes in detail specific embodiments of the present invention.
The invention provides a touch screen conducting circuit protection ink which comprises the following components in parts by weight: 150-500 parts of epoxy acrylic resin, 200-400 parts of polyurethane acrylic resin, 50-200 parts of active monomer, 50-100 parts of photoinitiator, 1-10 parts of defoaming agent, 150-300 parts of coupling agent, 150-300 parts of filler and 0-5 parts of pigment.
Preferably, the epoxy resin is a modified epoxy acrylic resin with the weight-average molecular weight of 1000-100000 and the acid value of 60-240 mgKOH/g. After a large number of experiments, the inventor surprisingly discovers that the acid-resistant etching solution performance and the alkali stripping effect of a coating film formed by the modified epoxy acrylic resin with the molecular weight of 1000-100000 and the acid value of 60-240 are optimal.
More preferably, the acid value of the epoxy resin is 80-200 mg KOH/g.
Preferably, the reactive monomer is one or more of difunctional acrylate, trifunctional acrylate and multifunctional acrylate. Examples of the bifunctional acrylic monomer include 1, 4-butanediol diacrylate, 1, 6-hexanediol diacrylate, and ethylene glycol diacrylate. Examples of the trifunctional acrylate monomer include trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate and pentaerythritol triacrylate. Examples of the polyfunctional acrylate monomer include dipentaerythritol hexaacrylate and pentaerythritol tetraacrylate. The above acrylate monomers may be used alone or in combination of 2 or more.
Preferably, the photoinitiator is any one or a mixture of more than one of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-acetone, 2-methyl-1- [ 4-methylthiophenyl ] -2-morpholinyl-1-acetone, 1-hydroxycyclohexyl phenyl ketone, benzophenone, Michler's ketone.
Preferably, the defoamer is a silicone defoamer. As the silicone antifoaming agent, there can be mentioned an antifoaming agent of model No. AKN3525 from Shenzhen Oakuo, an antifoaming agent of model No. BYK088 from Bike, Germany, an antifoaming agent of model No. Defom6800 from Hamming Demodex, and an antifoaming agent of model No. Efka2721 from Effa, Netherlands. The above antifoaming agents may be used alone or in combination of 2 or more.
Preferably, the coupling agent is a silane coupling agent. Examples of the silane coupling agent include KH550, KH551, KH560, KH570, KH602, and KH 792. The above coupling agents may be used alone, or 2 or more of them may be used in combination.
Preferably, the filler is any one or a mixture of more than one of fumed silica, polytetrafluoroethylene micro-wax powder, barium sulfate and talcum powder.
Preferably, the pigment is any one or more than one of iron blue, ultramarine blue, cobalt blue or phthalocyanine blue.
The preparation method of the UV photosensitive touch screen display area conducting wire protection ink comprises the following steps:
(1) adding epoxy acrylic resin, polyurethane acrylic resin, an active monomer, a photoinitiator, a defoaming agent and a coupling agent in proportion at the temperature of 20-35 ℃, and then stirring and mixing uniformly;
(2) adding the filler and the pigment according to the proportion, and continuously stirring until the mixture is uniformly mixed and no particulate matter can be seen by naked eyes;
(3) and grinding the slurry to the fineness of 3-5 microns by using a three-roll grinder, and discharging to obtain the conductive circuit protection ink for the display area of the UV photosensitive touch screen.
The UV photosensitive touch screen display area conducting circuit protection ink has the following construction process:
(1) printing UV photosensitive protective ink on a conductive film or ITO glass by screen printing;
(2) curing the UV photosensitive protective ink under the irradiation of an ultraviolet light source;
(3) the conductive film or glass firstly passes through an acid etching area, the etching solution is soaked in the conductive film or glass, the conductive layer is etched by the etching solution at a place where the conductive film or glass is not covered by the protection ink, then the conductive film or glass passes through an alkali fading area, 4% sodium hydroxide solution is soaked in the conductive film or glass to dissolve the protection ink, and finally the conductive circuit of the display area of the touch screen is manufactured after washing and drying.
It should be noted that the screen printing adopted in the embodiment of the present invention is only the coating of the photosensitive material in the conductive line manufacturing, and should be distinguished from the screen printing method in the prior art in which the line manufacturing is directly completed.
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental methods of the following examples, which are not specified under specific conditions, are generally determined according to national standards. If there is no corresponding national standard, it is carried out according to the usual international standards, to the conventional conditions or to the conditions recommended by the manufacturer. Unless otherwise indicated, all amounts are in parts by weight based on the total weight of the ink composition, the polymer molecular weight is number average molecular weight, and raw materials for polymeric ingredients not specified are commercially available.
Example 1
Raw materials: by weight percentage, 150 parts of epoxy acrylic resin, 300 parts of polyurethane acrylic resin, 200 parts of pentaerythritol triacrylate, 50 parts of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 8 parts of AKN3525, 8 parts of KH560, 280 parts of barium sulfate and 4 parts of phthalocyanine blue. Wherein the weight average molecular weight of the epoxy acrylic resin is 1000, and the acid value is 60 mgKOH/g.
The preparation method comprises the following steps: (1) placing the epoxy acrylic resin, the polyurethane acrylic resin, the pentaerythritol triacrylate, the 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, the AKN3525 and the KH560 in the weight fraction into a double-planet stirrer at the temperature of 20 ℃ and stirring for 2 hours; (2) adding barium sulfate and phthalocyanine blue into the double-planet stirrer, and continuously stirring for 2 hours; (3) and grinding the mixed liquid by a three-roll grinder until the fineness is less than 5 mu m, and discharging to obtain the conductive circuit protective ink for the display area of the UV photosensitive touch screen.
Example 2
Raw materials: the adhesive comprises, by weight, 200 parts of epoxy acrylic resin, 400 parts of polyurethane acrylic resin, 150 parts of pentaerythritol triacrylate, 50 parts of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 8 parts of AKN3525, 8 parts of KH560, 180 parts of barium sulfate and 4 parts of phthalocyanine blue. Wherein the weight average molecular weight of the epoxy acrylic resin is 1000, and the acid value is 60 mgKOH/g.
The preparation method comprises the following steps: (1) placing the epoxy acrylic resin, the polyurethane acrylic resin, the pentaerythrityl triacrylate, the 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, the AKN3525 and the KH560 in the weight fraction into a double-planet stirrer at 25 ℃, and stirring for 2 hours; (2) adding barium sulfate and phthalocyanine blue into the double-planet stirrer, and continuously stirring for 2 hours; (3) and grinding the mixed liquid by a three-roll grinder until the fineness is less than 5 mu m, and discharging to obtain the conductive circuit protective ink for the display area of the UV photosensitive touch screen.
Example 3
Raw materials: the adhesive comprises, by weight, 300 parts of epoxy acrylic resin, 300 parts of polyurethane acrylic resin, 100 parts of pentaerythrityl triacrylate, 50 parts of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 8 parts of AKN3525, 8 parts of KH560, 230 parts of barium sulfate and 4 parts of phthalocyanine blue. Wherein the weight average molecular weight of the epoxy acrylic resin is 1000, and the acid value is 60 mgKOH/g.
The preparation method comprises the following steps: (1) placing the epoxy acrylic resin, the polyurethane acrylic resin, the pentaerythritol triacrylate, the 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, the AKN3525 and the KH560 in the weight fraction into a double-planet stirrer at 25 ℃, and stirring for 2 hours; (2) adding barium sulfate and phthalocyanine blue into the double-planet stirrer, and continuously stirring for 2 hours; (3) and grinding the mixed liquid by a three-roll grinder until the fineness is less than 5 mu m, and discharging to obtain the conductive circuit protective ink for the display area of the UV photosensitive touch screen.
Example 4
Raw materials: the adhesive comprises, by weight, 400 parts of epoxy acrylic resin, 200 parts of polyurethane acrylic resin, 100 parts of pentaerythritol triacrylate, 50 parts of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 8 parts of AKN3525, 8 parts of KH560, 230 parts of barium sulfate and 4 parts of phthalocyanine blue. Wherein the weight average molecular weight of the epoxy acrylic resin is 1000, and the acid value is 60 mgKOH/g.
The preparation method comprises the following steps: (1) placing the epoxy acrylic resin, the polyurethane acrylic resin, the pentaerythritol triacrylate, the 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, the AKN3525, the KH560 and the fumed silica in a double-planet stirrer at 25 ℃ and stirring for 2 hours; (2) adding barium sulfate and phthalocyanine blue into the double-planet stirrer, and continuously stirring for 2 hours; (3) and grinding the mixed liquid by a three-roll grinder until the fineness is less than 5 mu m, and discharging to obtain the conductive circuit protective ink for the display area of the UV photosensitive touch screen.
Example 5
Raw materials: the adhesive comprises, by weight, 500 parts of epoxy acrylic resin, 200 parts of polyurethane acrylic resin, 50 parts of pentaerythritol triacrylate, 50 parts of 1-hydroxycyclohexyl phenyl ketone, 8 parts of AKN3525, 8 parts of KH560, 180 parts of barium sulfate and 4 parts of phthalocyanine blue. Wherein the weight average molecular weight of the epoxy acrylic resin is 1000, and the acid value is 60 mgKOH/g.
The preparation method comprises the following steps: (1) placing the epoxy acrylic resin, the polyurethane acrylic resin, the pentaerythritol triacrylate, the 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, the AKN3525 and the KH560 in the weight fraction into a double-planet stirrer at 30 ℃, and stirring for 2 hours; (2) adding barium sulfate and phthalocyanine blue into the double-planet stirrer, and continuously stirring for 2 hours; (3) and grinding the mixed liquid by a three-roll grinder until the fineness is less than 5 mu m, and discharging to obtain the conductive circuit protective ink for the display area of the UV photosensitive touch screen.
Example 6
The construction process of the UV photosensitive touch screen display area conducting line protection ink of the embodiment 1-5 comprises the following steps:
(1) and (3) screen printing UV photosensitive protective ink on a conductive film or ITO glass, wherein the thickness of a dry film is 6-8 um.
(2) And (3) carrying out UV curing on the conductive film or the ITO glass surface printed with the UV photosensitive protective ink, wherein the energy is as follows: 800mj/cm 2.
(3) Soaking the conductive film or glass in an acidic etching solution for 60min, etching the conductive layer by the etching solution at a place where the conductive film or glass is not covered by the protective ink, taking out the ITO glass, washing the ITO glass with water, removing the film by a 4 wt% sodium hydroxide solution, completely removing the ink coating after 30 seconds, and finally washing and drying to finish the manufacturing of the conductive circuit of the display area of the touch screen.
Testing film forming property: and (3) observing whether edge ink shrinkage, shrinkage cavity and finger touch surface humidity exist or not after the step (2) is completed. If there is no problem described above, it is marked as "O", otherwise it is marked as "X".
And (3) testing acid resistance: and (4) observing the ITO glass after the film is removed under a microscope after the step (3) is finished, wherein the etched pattern has the phenomena of short circuit, open circuit and obvious saw teeth on the edge. If there is no problem described above, it is marked as "O", otherwise it is marked as "X".
And (3) alkali washing performance test: and (4) observing whether residues exist on the surface of the ITO glass after the film is removed after the step (3) is finished. If the film is removed cleanly and has no residue, the film is marked as O, otherwise, the film is marked as X.
Table 1 shows the results of the ink performance test described in examples 1 to 5.
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Film forming property | O | O | O | O | O |
| Acid resistance | O | O | O | O | O |
| Alkali cleaning performance | O | O | O | O | O |
Through the embodiment, the ink disclosed by the invention is high in curing speed and good in film forming property, can play a very good role in protecting conductive circuits of a display area of a touch screen, protects the circuits covered by the ink to be intact, and does not cause circuit shortage, short circuit or saw-tooth shape; when the alkali is faded, the protective ink can be easily removed, and residues can not appear on the ITO glass.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The described embodiments are only some embodiments of the invention, not all embodiments. The raw materials in the examples are all commercially available, and the test methods in the examples are all conventional test methods. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A touch screen conductive circuit protection ink comprises the following components in parts by weight: 150-500 parts of epoxy acrylic resin, 200-400 parts of polyurethane acrylic resin, 50-200 parts of active monomer, 50-100 parts of photoinitiator, 1-10 parts of defoaming agent, 150-300 parts of coupling agent, 150-300 parts of filler and 0-5 parts of pigment.
2. The protective ink according to claim 1, wherein the epoxy resin is a modified epoxy acrylic resin having a weight average molecular weight of 1000 to 100000 and an acid value of 60 to 240mg KOH/g.
3. The protective ink according to claim 2, wherein the acid value of the epoxy resin is 80 to 200mg KOH/g.
4. The protective ink of claim 1, wherein the reactive monomer is one or more of difunctional acrylates, trifunctional acrylates, and multifunctional acrylates.
5. The protective ink according to claim 1, wherein the photoinitiator is any one or a mixture of more than one of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) -phenylphosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-methyl-1- [ 4-methylthiophenyl ] -2-morpholino-1-propanone, 1-hydroxycyclohexylphenylketone, benzophenone, Michler's ketone.
6. The protective ink of claim 1, wherein the defoamer is a silicone defoamer.
7. The protective ink of claim 1, wherein the coupling agent is a silane coupling agent.
8. The protective ink according to claim 1, wherein the filler is one or more of fumed silica, polytetrafluoroethylene micro wax powder, barium sulfate and talcum powder; the pigment is any one of iron blue, ultramarine blue, cobalt blue or phthalocyanine blue.
9. The method of preparing a protective ink according to any one of claims 1 to 8, comprising the steps of:
(1) adding epoxy acrylic resin, polyurethane acrylic resin, an active monomer, a photoinitiator, a defoaming agent and a coupling agent in proportion at the temperature of 20-35 ℃, and then stirring and mixing uniformly;
(2) adding the filler and the pigment according to the proportion, and continuously stirring until the mixture is uniformly mixed and no particulate matter can be seen by naked eyes;
(3) and grinding the slurry to the fineness of 3-5 microns by using a three-roll grinder, and discharging to obtain the conductive circuit protection ink for the display area of the UV photosensitive touch screen.
10. The process for applying protective ink according to any one of claims 1 to 8, comprising the steps of:
(1) printing UV photosensitive protective ink on a conductive film or ITO glass by screen printing;
(2) curing the UV photosensitive protective ink under the irradiation of an ultraviolet light source;
(3) the conductive film or glass firstly passes through an acid etching area, the etching solution is soaked in the conductive film or glass, the conductive layer is etched by the etching solution at a place where the conductive film or glass is not covered by the protection ink, then the conductive film or glass passes through an alkali fading area, 4% sodium hydroxide solution is soaked in the conductive film or glass to dissolve the protection ink, and finally the conductive circuit of the display area of the touch screen is manufactured after washing and drying.
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| CN112851131A (en) * | 2019-11-26 | 2021-05-28 | 惠州市清洋实业有限公司 | Etching solution for processing CD (compact disc) lines of camera lens and using method thereof |
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