CN114231089A - Water-fading water-based protective ink and preparation method thereof - Google Patents
Water-fading water-based protective ink and preparation method thereof Download PDFInfo
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- CN114231089A CN114231089A CN202111646530.XA CN202111646530A CN114231089A CN 114231089 A CN114231089 A CN 114231089A CN 202111646530 A CN202111646530 A CN 202111646530A CN 114231089 A CN114231089 A CN 114231089A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 230000001681 protective effect Effects 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000005562 fading Methods 0.000 title claims abstract description 19
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000000080 wetting agent Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000006184 cosolvent Substances 0.000 claims abstract description 16
- 239000000049 pigment Substances 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 17
- 239000006185 dispersion Substances 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 239000004925 Acrylic resin Substances 0.000 claims description 11
- 229920000178 Acrylic resin Polymers 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007639 printing Methods 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 229920002125 Sokalan® Polymers 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 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 4
- 239000004584 polyacrylic acid Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000009776 industrial production Methods 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 description 19
- 238000012360 testing method Methods 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000011521 glass Substances 0.000 description 6
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 238000007761 roller coating Methods 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000001055 blue pigment Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 229920006313 waterborne resin Polymers 0.000 description 1
- 239000013035 waterborne resin Substances 0.000 description 1
- 238000004383 yellowing Methods 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
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
-
- 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
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
-
- 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
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
-
- 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
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C09D11/104—Polyesters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention discloses a water-based protective ink capable of fading and a preparation method thereof, wherein the water-based protective ink capable of fading comprises the following components in percentage by weight: aqueous resin: 50% -70%; and (3) water-based leveling agent: 0.3% -2%; water-based defoaming agent: 0.3% -2%; aqueous wetting agent: 0.3% -2%; aqueous matting powder: 3% -10%; filling: 5% -10%; pigment: 0.1% -0.5%; water: 5% -30%; cosolvent: 0-10 percent, short demoulding time, no residue, wide applicable process and good high temperature resistance after film forming. The preparation method has the advantages of environment-friendly and pollution-free preparation process, simple and easy operation of the proportioning process, and suitability for industrial production.
Description
Technical Field
The invention relates to the technical field of water-based protective ink, in particular to water-fading water-based protective ink and a preparation method thereof.
Background
With the coming of the 5G era, the requirements of mobile phones, tablet computers and the like on signals are higher and higher, and non-metallic materials such as glass, ceramics, polycarbonate composite boards and the like become preferred materials of electronic products. The intelligent electronic product has very high requirements on screen resolution, so that the requirements on the appearance of the material are very high. In the actual process, scratches are the main cause of the increase of the fraction defective of the non-metallic materials. This requires a protective ink to protect the substrate processing process. Generally, a layer of protective ink is printed or sprayed, and then the ink is removed at a later stage.
The protective printing ink adopted in the market at present is mainly divided into two types: solvent-based and UV-based. The solvent-based ink contains a large amount of volatile solvent, has large pollution to production environment and is contrary to the current environmental protection requirement. The UV type protective printing ink needs to be cured by UV curing equipment after being coated, so that the production cost is increased, the problem that the printing ink is difficult to remove in the later period also exists, the printing ink is generally required to be soaked in NaOH solution with the concentration of more than 5 percent or subjected to ultrasonic stripping, and the stripping can be carried out only by heating alkali liquor to 70-90 ℃, so that the efficiency is low. And the alkali liquor can cause environmental pollution during the stripping. At present, water-soluble protective oil is available in the market, but the stripping process still needs alkali solution dissolution, ultrasonic dissolution or hot water soaking, and the water solubility at normal temperature cannot be realized.
Therefore, the development of an aqueous protective ink which is easily dissolved in water and stripped and has excellent performance is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the water-fading water-based protective ink and the preparation method thereof. The protective ink can be directly added with water to carry out the process operations of silk screen printing, spraying, roller coating and the like, the formed protective film is high temperature resistant, and tests show that the protective film can not crack or fall off after being maintained at the temperature of 200 ℃ for more than two hours, and shows the color of the pigment added during the preparation of the ink.
The technical scheme of the invention is as follows:
firstly, providing water-fading water-based protective ink, wherein the ink comprises the following components in percentage by weight:
aqueous resin: 50% -70%;
and (3) water-based leveling agent: 0.3% -2%;
water-based defoaming agent: 0.3% -2%;
aqueous wetting agent: 0.3% -2%;
aqueous matting powder: 3% -10%;
filling: 5% -10%;
pigment: 0.1% -0.5%;
water: 5% -30%;
cosolvent: 0 to 10 percent.
Preferably, the aqueous resin is: one or more of waterborne polyacrylic acid, waterborne saturated polyester or waterborne polyurethane.
Preferably, the aqueous polyacrylic acid is: one or more of an acrylic resin emulsion, an acrylic resin aqueous solution or an acrylic resin dispersion;
preferably, the particle size of the aqueous matting powder is 3 to 10 μm.
Preferably, the filler is one or more of talcum powder, kaolin, bentonite, barium sulfate and calcium carbonate.
Preferably, the cosolvent is one or more of propylene glycol methyl ether acetate, n-butanol or ethylene glycol monobutyl ether.
Preferably, the aqueous defoaming agent is a silicone defoaming agent, and the aqueous wetting agent is a non-silicone wetting agent.
The invention also provides a preparation method of the water-based protective ink capable of fading by water, which comprises the following steps:
stirring water-based resin, a water-based leveling agent, a water-based defoaming agent, a water-based wetting agent, pigment, water and a cosolvent at a first rotating speed for a first time to uniformly mix the water-based resin, the water-based leveling agent, the water-based defoaming agent, the water-based wetting agent, the pigment, the water and the cosolvent to obtain a primary dispersion liquid;
stirring and adding the filler at a second rotating speed, and stirring for a second time;
stirring and adding the aqueous matting powder at a third rotating speed, and stirring for a third time to obtain a medium-grade dispersion liquid;
and grinding the obtained medium-grade dispersion liquid by using a three-roller machine until the fineness is less than 5 mu m to obtain the finished product of the water-based protective ink.
Preferably, the first rotation speed is 480-.
Preferably, the temperature of the dispersion is controlled below 40 ℃ during the third time of adding the aqueous matting powder under stirring at the third rotation speed and stirring.
By adopting the scheme, the water-based protective printing ink capable of being faded by water and the preparation method thereof have the following beneficial effects:
the water-based protective ink capable of fading by water is suitable for various printing substrates, the curing speed is high, an ink protective film layer formed by experimental detection can bear the high temperature of more than 200 ℃ for two hours, the surface of the ink protective film has no crack, no drop and no color change, and the water-based protective ink has better performance compared with the protective ink in the prior art.
When the water-based protective ink capable of being faded by water is demoulded, the substrate coated with the ink protective film is directly put into tap water and washed for 5-20s at normal temperature, so that the ink protective film can be completely dissolved and removed, no ink is left on the surface of the substrate, and the ink protective film is dissolved and falls off when falling off, and cannot block a water tank because the ink protective film is broken into pieces and falls off.
The raw materials required by the water-fading water-based protective ink are all materials which are easily purchased in the market, the proportioning process is simple and easy to operate, and the water-fading water-based protective ink is suitable for industrial production.
The preparation method of the water-fading water-based protective ink has mild preparation conditions, does not need special professional equipment, and has environment-friendly and pollution-free preparation process.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described in detail. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
The invention discloses a water-fading water-based protective ink, which comprises the following components: 50-70% of water-based resin, 0.3-2% of water-based flatting agent, 0.3-2% of water-based defoaming agent, 0.3-2% of water-based wetting agent, 3-10% of water-based matting powder, 5-10% of filler, 0.1-0.5% of pigment, 5-30% of water and 0-10% of cosolvent.
The water-based resin is the main component of the water-based protective ink, is adhered to a substrate by heating and curing, and the selection of the material determines the basic properties of a product after heat curing, such as flexibility, adhesive force, aging resistance and the like. In consideration of the above factors, the aqueous resin in the present invention may be one or more of aqueous polyacrylic acid, aqueous saturated polyester or aqueous polyurethane. Among them, preferred are aqueous polyacrylics such as acrylic resin emulsion, acrylic resin aqueous solution or acrylic resin dispersion, and the like. Wherein, more preferably, the waterborne resin is acrylic resin dispersoid which is simple to process and wide in construction range, and can be sprayed by a screen printing method or a roller coating method.
The leveling agent can improve the leveling shape of an ink coating film, and the water-based leveling agent can be an organic silicon leveling agent, preferably Digao TEGO410, TEGO450 or ByK-341, BYK-344 and BYK-348, or a non-silicon leveling agent, preferably one or a mixture of BYK-381 and EFKA-3580. The non-silicon leveling agent is preferably used as the aqueous leveling agent, and compared with a silicon leveling agent, the aqueous leveling agent does not cause surface defects such as shrinkage cavities, needle holes and the like, and has good flatness.
The defoaming agent is used for eliminating foams in the water-based ink, the water-based defoaming agent can be an organic silicon defoaming agent, preferably one or a mixture of more than one of Digao TEGO-FOAMEX825, TEGO-FOAMEX810, TEGO-Airex901W, TEGO-Airex902W or ByK-023 and BYK-028, or a non-silicon defoaming agent, preferably one or a mixture of more than one of Digao TEGO-FOAMEX K3 and TEGO-FOAMEX 845. The water-based defoaming agent is preferably an organic silicon defoaming agent, the defoaming speed of the organic silicon defoaming agent is high, and the surface flatness of the ink surface after the foam breaking is excellent.
Because the surface tension of the water-based ink is greater than that of the substrate, the phenomena of interface fault, bottom leakage and the like of the coating in the process of quick spreading or spraying often occur, and after the water-based wetting agent is added, the water-based ink can still well wet the substrate when moving, thus helping the leveling, spreading and permeating of the coating film without influencing the adhesive force. The water-based wetting agent can be a silicone wetting agent, preferably one or a mixture of Digao TEGO WET KL 245, TEGO WET270 and TEGO 4200, or a non-silicone wetting agent, preferably one or a mixture of Digao TEGO WET500 and Bikk BYK-185. The non-silicon wetting agent is preferably selected as the water-based wetting agent, and the non-silicon wetting agent has high compatibility, particularly high compatibility to purified water and a cosolvent.
The water-washing matting powder is one or a mixture of several of ACEMATT 3300, ACEMATT OK520 or ACEMATT TS 100. The particle size of the water-washing matting powder is controlled to be 3-10 mu m, the water-based matting powder with the micro particle size in the range is beneficial to dispersion of water-based ink and construction effect after dispersion, the particle size is too fine (less than 1um) and is not easy to disperse, especially under the water-based condition, the water-based matting powder is easy to agglomerate, and too coarse (more than 10um) is not beneficial to ink construction, and abnormity of ink surface, adhesion force reduction and the like can occur.
The filler of the invention is one or a mixture of more of talcum powder, kaolin, bentonite, barium sulfate and calcium carbonate. The filler is added to improve the abrasion resistance of the ink, and talc (hydrous magnesium silicate) is preferred in the present invention. The talcum powder has good compatibility under the water-based condition, small particle size, low oil absorption and water absorption, is beneficial to dispersion and is not easy to agglomerate and lump; high quality and low price, and can effectively control the manufacturing cost.
The pigment is added in a certain amount to reduce the color difference possibly generated by the backlight source assembly, and the pigment can be blue, green, yellow, red, black or the like, and is preferably blue pigment.
In the invention, water is used as a solvent, so that the water-based ink has the remarkable characteristics of environmental protection and safety: safe, non-toxic, non-inflammable, non-explosive and almost no volatile organic gas.
In the invention, a certain amount of cosolvent can be added to help the mixing and dissolving to be uniform, and the stability of the water-based ink dispersion system is enhanced. The cosolvent can be selected from one or more of PMA (propylene glycol methyl ether acetate), n-butanol and anti-white water (ethylene glycol monobutyl ether).
The preparation method of the water-fading water-based protective ink comprises the following steps:
step 1, mixing 50-70 wt% of water-based resin, 0.3-2 wt% of water-based leveling agent, 0.3-2 wt% of water-based defoaming agent, 0.3-2 wt% of water-based wetting agent, 5-10 wt% of pigment, 5-30 wt% of water and 0-10 wt% of cosolvent, and stirring at the rotating speed of 480-;
step 2, stirring and adding 5-10% of filler at the rotating speed of 380-420r/min, and stirring for 8-15 min;
step 3, stirring and adding 3-10% of aqueous matting powder at the rotating speed of 540-;
and 4, grinding the obtained medium-grade dispersion liquid by using a three-roller machine until the fineness is less than 5 mu m to obtain the finished product of the water-based protective ink.
The invention provides examples 1-6, wherein the components in the weight parts in the table 1 are respectively weighed, and the water-based protective ink is prepared by the preparation method.
TABLE 1
Adding water into the prepared water-based ink according to a certain proportion, and then coating the water-based ink on a substrate by utilizing a screen printing, spraying or roller coating process (generally, 10-20 wt% of water is added in the screen printing process, and 80-120 wt% of water is added in the roller coating and spraying process), wherein the substrate can be glass, sapphire, ceramic, PET, PC, PMMA and the like, the substrate coated with the water-based ink is dried at 80 ℃ for 20-30min, and the surface of the substrate is cured to form an ink film layer. In each of examples 1 to 6, 15 wt% of water was added, screen-printed on the glass surface, dried at 80 ℃ for 30min to form a film, and then subjected to the test in a unified manner.
Table 2 shows the test items and test results of the examples in table 1.
TABLE 2
(1) The adhesion test procedure was as follows:
spreading the substrate on which the ink film layer is cured on a table top, keeping the ink film surface clean, scribing 10 multiplied by 10 and 1 multiplied by 1mm hundreds grids on the film surface by a hundreds grid knife, and wiping off scraps at the hundreds grids; pressing the 3M600 glue on the face of the hundred-grid film for about 10s, rapidly pulling up the hundred-grid film along the face of the substrate with vertical force, continuously pulling for 3-5 times, observing the powder falling condition of the film, sequentially judging whether the adhesive force of the ink film is good or not, and expressing the result by a score. The adhesive force evaluation standard is as follows: the hundred lattices do not have any powder falling, and the grade is 5B; the powder falling area in the grid area is less than or equal to 5 percent, and the grade is 4B; the powder falling area of the check area is 5-15%, and the grade is 3B; the flour dropping area of the grid area is 15-35%, and the grade is 2B; the flour dropping area of the check area is 35-65%, and the grade is 1B; the large-area membrane falling phenomenon occurs in the grid area, the removed membrane area is more than 65%, and the grade is 0B. In 6 embodiments of the invention, the adhesion grade reaches a 5B premium grade.
(2) The temperature testing procedure was as follows:
and (3) placing the substrate with the cured ink film layer into an oven with adjustable temperature, sequentially increasing the temperature from 80 ℃ to 10 ℃ upwards in a superposition manner, wherein the baking time of each interval is 30min, and observing the surface properties of the film layer after baking. The temperature resistance test evaluation criteria are as follows: the film layer has no color change (the standard in the embodiment of the invention is transparent blue), and the temperature resistance is judged; the abnormal phenomena of yellowing, cracking, non-decohesion of the film due to water invasion at normal temperature and the like occur, and the temperature is judged to be not resistant. In 6 embodiments of the invention, the temperature resistance can reach more than 200 ℃, the surface of the ink film layer has no crack, no drop, no color change of the film layer, and the color of the pigment added during the preparation of the ink is presented.
(3) Demoulding test process:
and (3) placing the substrate with the cured ink film layer into a tap water tank, timing by using an electronic stopwatch, recording the time required by the complete fading of the ink film layer, and observing whether ink marks remain on the substrate or not. Stripping test evaluation criteria: the ink film layer quickly falls off, and the substrate has no residual sign of the film layer and fog shadow after water fading. In 6 embodiments of the invention, after the ink film layer is flushed by running water at normal temperature, the color ink is completely dissolved in the water and falls off, the phenomenon of flaking off can not occur, the substrate surface has no residue and no trace, the original surface state of the protected substrate is exposed, namely the color ink is completely removed, and the flushing time is between 5 and 15 seconds. The film is removed without ultrasound or heating, and the film removing performance is far higher than that of the water-based ink in the prior art.
Comparative example 1
According to weight percentage, the water-based polyurethane is 80%, the water-based leveling agent is 1.5%, and the water-based defoaming agent is: 1.5 percent; aqueous wetting agent: 0.5 percent; aqueous matting powder: 3 percent; filling: 2 percent; pigment: 0.1 percent; water: 5 percent; cosolvent: 6.4 percent of water-based ink prepared by the preparation method of the invention is added with 20 percent of water by mass, the water-based ink is silk-screened on the surface of glass, the glass is dried for 20min at 80 ℃ to form a film, then the above item tests are carried out, the test conditions and the method are the same as those of the examples 1 to 6, the adhesive force is 5B, the bearing temperature is 250 ℃, and the film can be removed by flushing the water under normal temperature tap water for 1 min. The adhesive force and bearing temperature of the ink film layer meet the requirements, but the stripping time is longer.
Comparative example 2
According to the weight percentage, taking 40 percent of acrylic resin dispersoid, 0.8 percent of water-based leveling agent, and water-based defoaming agent: 0.3 percent; aqueous wetting agent: 0.3 percent; aqueous matting powder: 8 percent; filling: 10 percent; pigment: 0.5 percent; water: 32 percent; cosolvent: 8.1 percent of water-based ink prepared by the preparation method of the invention is added with 10 percent of water by mass, the water-based ink is silk-screened on the surface of glass, dried for 35min at 80 ℃ to form a film, and then the above item tests are carried out, the test conditions and the method are the same as those of the examples 1-6, the adhesive force is 3B, the water-based ink can be peeled off by washing the water-based ink under the normal temperature tap water for 10s at 180 ℃. The ink film layer has the advantages of short demoulding time, poor adhesive force and low bearing temperature.
In conclusion, the water-based protective ink capable of being faded by water can be stripped after being washed under tap water at normal temperature, the stripping time is short, no residue is left, the application process is wide, and the high-temperature resistance after film forming is good. The preparation method has the advantages of environment-friendly and pollution-free preparation process, simple and easy operation of the proportioning process, and suitability for industrial production.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The water-based protective printing ink capable of fading by water is characterized by comprising the following components in percentage by weight:
aqueous resin: 50% -70%;
and (3) water-based leveling agent: 0.3% -2%;
water-based defoaming agent: 0.3% -2%;
aqueous wetting agent: 0.3% -2%;
aqueous matting powder: 3% -10%;
filling: 5% -10%;
pigment: 0.1% -0.5%;
water: 5% -30%;
cosolvent: 0 to 10 percent.
2. The water-dissipatable aqueous protective ink according to claim 1, wherein said aqueous resin is: one or more of waterborne polyacrylic acid, waterborne saturated polyester or waterborne polyurethane.
3. The water-dissipatable protective ink according to claim 2, characterized in that said water-borne polyacrylic acids are: one or more of an acrylic resin emulsion, an acrylic resin aqueous solution, or an acrylic resin dispersion.
4. The water-shedding water-based protective ink as claimed in claim 1, wherein the particle size of the water-based matting powder is 3 to 10 μm.
5. The water-based protective ink capable of fading according to claim 1, wherein the filler is one or more of talcum powder, kaolin, bentonite, barium sulfate and calcium carbonate.
6. The water-reducible water-based protective ink according to claim 1, wherein the cosolvent is one or more of propylene glycol methyl ether acetate, n-butanol or ethylene glycol monobutyl ether.
7. The water-based protective ink capable of fading according to claim 1, wherein the water-based leveling agent is a non-silicon leveling agent, the water-based defoaming agent is an organic silicon defoaming agent, and the water-based wetting agent is a non-silicon wetting agent.
8. A process for the preparation of a water-dissipatable aqueous protective ink according to any one of claims 1 to 7, characterized in that it comprises the following steps:
mixing water-based resin, a water-based leveling agent, a water-based defoaming agent, a water-based wetting agent, pigment, water and a cosolvent, and stirring at a first rotating speed for a first time to uniformly mix the water-based resin, the water-based leveling agent, the water-based defoaming agent, the water-based wetting agent, the pigment, the water and the cosolvent to obtain a primary dispersion liquid;
stirring and adding the filler at a second rotating speed, and stirring for a second time;
stirring and adding the aqueous matting powder at a third rotating speed, and stirring for a third time to obtain a medium-grade dispersion liquid;
and grinding the obtained medium-grade dispersion liquid by using a three-roller machine to obtain the finished product of the water-based protective ink.
9. The method as claimed in claim 8, wherein the first rotation speed is 480-520r/min, the second rotation speed is 380-420r/min, the third rotation speed is 540-580r/min, the first time and the second time are both 8-15min, and the third time is 45-65 min.
10. The water-reducible protective ink according to claim 8 or 9, wherein the temperature of the dispersion is controlled to be below 40 ℃ during the third time of stirring and adding the water-soluble matting powder at the third rotation speed.
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| CN115851034A (en) * | 2022-12-28 | 2023-03-28 | 广州亦盛环保科技有限公司 | Heat-sensitive water-soluble protective ink and preparation method and application thereof |
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Application publication date: 20220325 |