CN113416448A - UV (ultraviolet) ink and preparation method thereof - Google Patents
UV (ultraviolet) ink and preparation method thereof Download PDFInfo
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- CN113416448A CN113416448A CN202110866923.5A CN202110866923A CN113416448A CN 113416448 A CN113416448 A CN 113416448A CN 202110866923 A CN202110866923 A CN 202110866923A CN 113416448 A CN113416448 A CN 113416448A
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to the technical field of UV (ultraviolet) ink, in particular to UV ink and a preparation method thereof, wherein the UV ink comprises the following raw materials in parts by weight: 50-70 parts of epoxy acrylate, 10-15 parts of polyester acrylate, 4-8 parts of polydiallyl phthalate, 3-5 parts of photoinitiator, 2-3 parts of photosensitizer, 15-25 parts of reactive diluent, 5-10 parts of diatomite, 0.2-0.5 part of defoaming agent, 1-2 parts of polyethylene wax, 2-4 parts of dispersing agent and 0-20 parts of colorant, and the components have synergistic effect, so that the overall adhesion, flexibility, wear resistance and curing effect of the UV ink are improved, and the viscosity is reduced.
Description
Technical Field
The invention relates to the technical field of UV (ultraviolet) ink, in particular to UV ink and a preparation method thereof.
Background
UV (ultraviolet curing) ink refers to ink which is formed into a film and dried by polymerizing monomers in an ink vehicle into polymers under ultraviolet irradiation with ultraviolet light of different wavelengths and energies. UV inks also belong to the group of inks, as they must possess brilliant color (except in special cases), good printability, and suitable curing drying rates. However, most of the existing UV printing ink has the defects that the whole curing effect is influenced due to the fact that the surface of a film layer is hindered from light after the surface of the film layer is dried, the adhesive force and the flexibility are insufficient, the viscosity of the printing ink is too high, and the requirement of a customer is difficult to meet.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the UV ink which has the advantages of good adhesion effect, good flexibility, wear resistance, lower viscosity and good curing effect.
The invention also aims to provide a preparation method of the UV ink, which has the advantages of simple operation, convenient control, high production efficiency and low production cost and can be used for large-scale production.
The purpose of the invention is realized by the following technical scheme: the UV printing ink comprises the following raw materials in parts by weight:
according to the UV ink, epoxy acrylate is used as a main prepolymer, the UV ink has the characteristics of high curing speed, strong adhesive force and softness, and the overall adhesive property, flexibility, wear resistance and curing effect of the UV ink are improved and the viscosity is reduced under the synergistic effect of polyester acrylate, polydiallyl phthalate, a photoinitiator, a photosensitizer, a reactive diluent, diatomite, a defoaming agent, polyethylene wax, a dispersing agent, a coloring agent and other auxiliaries; the added polyester acrylate, polydiallyl phthalate and reactive diluent synergistically act to adjust the viscosity of the ink, promote uniform mixing of UV ink, improve the printing effect and promote the hardening rate of the ink under the action of ultraviolet rays; the added diatomite is uniformly dispersed in the UV printing ink under the action of a dispersing agent and an active diluent, and due to the porous adsorption structure characteristic, after the UV printing ink is cured, the resin and the diatomite cooperate to form a reinforced network structure distributed on a UV printing ink film layer, so that the flexibility, the wear resistance and the adhesive force of the printing ink are further improved; the added polyethylene wax improves the wear resistance of the ink, and floats on the surface to form a protective layer to block the inhibition of oxygen to photoinitiated curing.
Preferably, the preparation method of the epoxy acrylate comprises the following steps:
(R1), taking 100 parts of epoxy resin, 33-36 parts of acrylic acid, 0.01-0.05 part of hydroquinone, 0.05-0.1 part of triethylamine and 10-30 parts of vinyl alkoxy silane oligomer according to parts by weight for later use;
(R2), mixing acrylic acid, hydroquinone and triethylamine to obtain a mixed solution;
(R3), heating the epoxy resin to 90-100 ℃ while stirring, then continuously dripping the mixed solution, and reacting for 2-4h at the temperature of 110-120 ℃ to obtain a semi-finished product;
(R4), adding vinyl alkoxy silane oligomer into the semi-finished product, stirring and reacting for 0.5-3h at the temperature of 50-100 ℃ under the catalysis of organic tin, carrying out reduced pressure distillation, washing, drying and filtering to obtain the epoxy acrylate.
The epoxy acrylate prepared by the preparation method introduces the vinyl alkoxy silane oligomer, so that the adhesiveness of the ink and the interfacial property between the epoxy acrylate and the diatomite and the colorant are improved more effectively, and the dispersion effect is improved. In addition, the added hydroquinone avoids the violent reaction which increases the viscosity of the epoxy acrylate.
Further, the epoxy resin is EP-12, EP-13, EP-16 or EP-20; the vinyl alkoxy silane oligomer is selected from
Or
By adopting the technical scheme, the selected vinyl alkoxy silane oligomer is more beneficial to improving the dispersion of the filler and improving the impact strength and the wear resistance of the ink after curing.
Preferably, the polyester acrylate is selected from aronium M-8030 or kotian 2101.
By adopting the technical scheme, the UV ink has synergistic effect with the diallyl phthalate and the reactive diluent, is more favorable for adjusting the viscosity of the ink, promotes the uniform mixing of the UV ink and improves the printing effect, and can promote the hardening rate of the ink under the action of ultraviolet rays.
Preferably, the photoinitiator is at least two combinations of benzophenone, 2-isopropyl thioxanthone, 4-dimethylamino-ethyl benzoate and 2-dimethylamino-2-benzyl-1- [ -4 (4-morpholinyl) phenyl ] -1-butanone; the photosensitizer is benzoin dimethyl ether.
Adopt above-mentioned technical scheme, photoinitiator and photosensitizer synergism expand photoinitiator's sensitization scope, thereby promote dark, large granule, the solidification that covers the china ink of long wave UV photocuring effect, avoided simultaneously initiating reaction in-process by the oxygen quenching lead to the light initiation effect variation and reduce curing efficiency. More preferably, the photoinitiator is benzophenone and 4-dimethylamino-ethyl benzoate in a weight ratio of 3-5: 1, which is more beneficial to avoiding the curing efficiency from being reduced due to the poor photoinitiation effect caused by oxygen quenching in the initiation reaction process.
Preferably, the reactive diluent is a combination of at least two of 2-methoxy ethyl acrylate, propenyl ester-2-ethyl ester, tripropylene glycol diacrylate, bisphenol alpha dimethacrylate and trimethylolpropane triacrylate.
By adopting the technical scheme, the epoxy acrylate is diluted under the combined action of the epoxy acrylate and the polyester acrylate, so that the viscosity of the ink can be adjusted, the uniform mixing of the UV ink can be promoted, and the printing effect can be improved; more preferably, the reactive diluent is 2-methoxy ethyl acrylate and tripropylene glycol diacrylate in a weight ratio of 2: 2-3, the curing rate of the ink under the ultraviolet condition is improved, and the flexibility and the hardness of the cured coating are improved.
Preferably, the particle size of the diatomite is 10-80 nm; the dispersant is Dispenser S15.
By adopting the technical scheme, the diatomite is uniformly dispersed in the UV printing ink under the action of the dispersing agent and the active diluent, and due to the porous adsorption structure characteristic, after the UV printing ink is cured, the resin and the diatomite cooperatively form a reinforced network structure distributed on a UV printing ink film layer, so that the flexibility, the wear resistance and the adhesive force of the printing ink are further improved.
Preferably, the defoaming agent is BYK052, BYK-021 or BYK-024.
By adopting the technical scheme, the air bubbles generated in the manufacturing and using processes of the ink are prevented or eliminated, and the adverse effect of the air bubbles on the ink curing process is avoided.
Preferably, the colorant is at least one of titanium dioxide, benzidine yellow, phthalocyanine blue, permanent red, pink, rubine, sunfast dark red and carbon black.
The other purpose of the invention is realized by the following technical scheme: the preparation method of the UV ink comprises the following steps:
(S1) taking epoxy acrylate, polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomite, defoaming agent, polyethylene wax, dispersing agent and coloring agent according to parts by weight for later use;
(S2), under the stirring condition, adding epoxy acrylate, polyester acrylate, polydiallyl phthalate, a dispersing agent, diatomite, a coloring agent, polyethylene wax and a defoaming agent into an active diluent, uniformly mixing, and grinding to the fineness of 15-25 μm to obtain a grinding material;
(S3), adding the photoinitiator and the photosensitizer into the grinding material, and uniformly mixing to obtain the UV ink.
The invention has the beneficial effects that: according to the UV ink, epoxy acrylate is used as a main prepolymer, the UV ink has the characteristics of high curing speed, strong adhesive force and softness, and the overall adhesive property, flexibility, wear resistance and curing effect of the UV ink are improved and the viscosity is reduced under the synergistic effect of polyester acrylate, polydiallyl phthalate, a photoinitiator, a photosensitizer, a reactive diluent, diatomite, a defoaming agent, polyethylene wax, a dispersing agent, a coloring agent and other auxiliaries; the added polyester acrylate, polydiallyl phthalate and reactive diluent synergistically act to adjust the viscosity of the ink, promote uniform mixing of UV ink, improve the printing effect and promote the hardening rate of the ink under the action of ultraviolet rays; the added diatomite is uniformly dispersed in the UV printing ink under the action of the dispersing agent and the active diluent, and due to the porous adsorption structure characteristic, after the UV printing ink is solidified, the resin and the diatomite cooperatively form a reinforced network structure distributed on a UV printing ink film layer, so that the flexibility, the wear resistance and the adhesive force of the printing ink are further improved.
The preparation method of the UV ink is simple to operate, convenient to control, high in production efficiency and low in production cost, and can be used for large-scale production.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
The UV printing ink comprises the following raw materials in parts by weight:
the preparation method of the epoxy acrylate comprises the following steps:
(R1), taking 100 parts of epoxy resin, 35 parts of acrylic acid, 0.03 part of hydroquinone, 0.08 part of triethylamine and 20 parts of vinyl alkoxy silane oligomer according to parts by weight for later use;
(R2), mixing acrylic acid, hydroquinone and triethylamine to obtain a mixed solution;
(R3), heating the epoxy resin to 95 ℃ while stirring, continuously dropwise adding the mixed solution, and reacting at the temperature of 115 ℃ for 3 hours to obtain a semi-finished product;
(R4), adding vinyl alkoxy silane oligomer into the semi-finished product, stirring and reacting for 1.5h at the temperature of 80 ℃ under the catalysis of organic tin, carrying out reduced pressure distillation, washing, drying and filtering to obtain the epoxy acrylate.
The epoxy resin is EP-12; the vinyl alkoxy silane oligomer is selected from
The polyester acrylate is selected from ARONIX M-8030.
The photoinitiator is prepared from benzophenone and 4-dimethylamino-ethyl benzoate according to a weight ratio of 4: 1, mixing; the photosensitizer is benzoin dimethyl ether.
The active diluent is 2-methoxy ethyl acrylate and tripropylene glycol diacrylate according to the weight ratio of 2: 2.5 mixing.
The particle size of the diatomite is 40 nm; the dispersant is Dispenser S15.
The defoaming agent is BYK 052.
The colorant is titanium dioxide.
The preparation method of the UV ink comprises the following steps:
(S1) taking epoxy acrylate, polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomite, defoaming agent, polyethylene wax, dispersing agent and coloring agent according to parts by weight for later use;
(S2), under the stirring condition, adding epoxy acrylate, polyester acrylate, polydiallyl phthalate, a dispersing agent, diatomite, a coloring agent, polyethylene wax and a defoaming agent into an active diluent, uniformly mixing, and grinding to the fineness of 20 microns to obtain a grinding material;
(S3), adding the photoinitiator and the photosensitizer into the grinding material, and uniformly mixing to obtain the UV ink.
Example 2
The UV printing ink comprises the following raw materials in parts by weight:
the preparation method of the epoxy acrylate comprises the following steps:
(R1), taking 100 parts of epoxy resin, 33 parts of acrylic acid, 0.01 part of hydroquinone, 0.05 part of triethylamine and 10 parts of vinyl alkoxy silane oligomer according to parts by weight for later use;
(R2), mixing acrylic acid, hydroquinone and triethylamine to obtain a mixed solution;
(R3), heating the epoxy resin to 90 ℃ while stirring, continuously dropwise adding the mixed solution, and reacting for 2 hours at the temperature of 110 ℃ to obtain a semi-finished product;
(R4), adding vinyl alkoxy silane oligomer into the semi-finished product, stirring and reacting for 0.5h at the temperature of 50 ℃ under the catalysis of organic tin, carrying out reduced pressure distillation, washing, drying and filtering to obtain the epoxy acrylate.
The epoxy resin is EP-16; the vinyl alkoxy silane oligomer is selected from
The polyester acrylate is selected from koda 2101.
The photoinitiator is prepared from benzophenone and 4-dimethylamino-ethyl benzoate according to a weight ratio of 3: 1, mixing; the photosensitizer is benzoin dimethyl ether.
The active diluent is 2-methoxy ethyl acrylate and tripropylene glycol diacrylate according to the weight ratio of 2: 2, mixing the components.
The particle size of the diatomite is 10 nm; the dispersant is Dispenser S15.
The defoaming agent is BYK-024.
The preparation method of the UV ink comprises the following steps:
(S1) taking epoxy acrylate, polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomite, defoaming agent, polyethylene wax, dispersing agent and coloring agent according to parts by weight for later use;
(S2), under the stirring condition, adding epoxy acrylate, polyester acrylate, polydiallyl phthalate, a dispersing agent, diatomite, a coloring agent, polyethylene wax and a defoaming agent into an active diluent, uniformly mixing, and grinding to the fineness of 15 microns to obtain a grinding material;
(S3), adding the photoinitiator and the photosensitizer into the grinding material, and uniformly mixing to obtain the UV ink.
Example 3
The UV printing ink comprises the following raw materials in parts by weight:
the preparation method of the epoxy acrylate comprises the following steps:
(R1), taking 100 parts of epoxy resin, 36 parts of acrylic acid, 0.05 part of hydroquinone, 0.1 part of triethylamine and 30 parts of vinyl alkoxy silane oligomer according to parts by weight for later use;
(R2), mixing acrylic acid, hydroquinone and triethylamine to obtain a mixed solution;
(R3), heating the epoxy resin to 100 ℃ while stirring, continuously dropwise adding the mixed solution, and reacting for 4 hours at the temperature of 120 ℃ to obtain a semi-finished product;
(R4), adding vinyl alkoxy silane oligomer into the semi-finished product, stirring and reacting for 3 hours at the temperature of 100 ℃ under the catalysis of organic tin, carrying out reduced pressure distillation, washing, drying and filtering to obtain the epoxy acrylate.
The epoxy resin is EP-16; the vinyl alkoxy silane oligomer is selected from
The polyester acrylate is selected from ARONIX M-8030.
The photoinitiator is prepared from benzophenone and 4-dimethylamino-ethyl benzoate according to a weight ratio of 5: 1, mixing; the photosensitizer is benzoin dimethyl ether.
The active diluent is 2-methoxy ethyl acrylate and tripropylene glycol diacrylate according to the weight ratio of 2: 3, and mixing.
The particle size of the diatomite is 80 nm; the dispersant is Dispenser S15.
The defoaming agent is BYK-021.
The colorant is phthalocyanine blue.
The preparation method of the UV ink comprises the following steps:
(S1) taking epoxy acrylate, polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomite, defoaming agent, polyethylene wax, dispersing agent and coloring agent according to parts by weight for later use;
(S2), under the stirring condition, adding epoxy acrylate, polyester acrylate, polydiallyl phthalate, a dispersing agent, diatomite, a coloring agent, polyethylene wax and a defoaming agent into an active diluent, uniformly mixing, and grinding to the fineness of 25 mu m to obtain a grinding material;
(S3), adding the photoinitiator and the photosensitizer into the grinding material, and uniformly mixing to obtain the UV ink.
Example 4
The UV printing ink comprises the following raw materials in parts by weight:
the preparation method of the epoxy acrylate comprises the following steps:
(R1), taking 100 parts of epoxy resin, 35 parts of acrylic acid, 0.02 part of hydroquinone, 0.06 part of triethylamine and 15 parts of vinyl alkoxy silane oligomer according to parts by weight for later use;
(R2), mixing acrylic acid, hydroquinone and triethylamine to obtain a mixed solution;
(R3), heating the epoxy resin to 98 ℃, continuously dropwise adding the mixed solution, and reacting at 112 ℃ for 2.5h to obtain a semi-finished product;
(R4), adding vinyl alkoxy silane oligomer into the semi-finished product, stirring and reacting for 2.5h at the temperature of 70 ℃ under the catalysis of organic tin, carrying out reduced pressure distillation, washing, drying and filtering to obtain the epoxy acrylate.
The epoxy resin is EP-13; the vinyl alkoxy silane oligomer is selected from
The polyester acrylate is selected from koda 2101.
The photoinitiator is prepared from benzophenone and 4-dimethylamino-ethyl benzoate according to a weight ratio of 4: 1, mixing; the photosensitizer is benzoin dimethyl ether.
The active diluent is 2-methoxy ethyl acrylate and tripropylene glycol diacrylate according to the weight ratio of 2: 2.8 are mixed.
The particle size of the diatomite is 60 nm; the dispersant is Dispenser S15.
The defoaming agent is BYK-024.
The colorant is carbon black.
The preparation method of the UV ink comprises the following steps:
(S1) taking epoxy acrylate, polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomite, defoaming agent, polyethylene wax, dispersing agent and coloring agent according to parts by weight for later use;
(S2), under the stirring condition, adding epoxy acrylate, polyester acrylate, polydiallyl phthalate, a dispersing agent, diatomite, a coloring agent, polyethylene wax and a defoaming agent into an active diluent, uniformly mixing, and grinding to the fineness of 18 mu m to obtain a grinding material;
(S3), adding the photoinitiator and the photosensitizer into the grinding material, and uniformly mixing to obtain the UV ink.
Comparative example 1
This comparative example differs from example 1 in that:
the diatomite is replaced by nano silicon dioxide powder with the particle size of 20 nm.
Comparative example 2
This comparative example differs from example 1 in that:
the epoxy acrylate is selected from epoxy acrylates of golden brocade chemical company, CAS: 71281-65-7.
Comparative example 3
This comparative example differs from example 1 in that:
the vinylalkoxysilane oligomer is replaced with methyltriethoxysilane.
Comparative example 4
This comparative example differs from example 1 in that:
the active diluent is 2-methoxy ethyl acrylate and propenyl-2-ethyl ester according to the weight ratio of 2: 2.5 mixing.
Comparative example 5
This comparative example differs from example 1 in that:
the photoinitiator is benzophenone and 2-isopropyl thioxanthone according to a weight ratio of 4: 1 are mixed.
Example 5
The UV inks of examples 1 to 4 and comparative examples 1 to 5 were tested for adhesion, abrasion resistance, flexibility, viscosity and through-cure time, respectively, as follows:
adhesion force: testing according to GBT9286-1998 paint film marking test, observing a test result, and evaluating the adhesive force grade;
wear resistance: observing whether the ink film is peeled off or incomplete according to an RCA paper tape abrasion test, a load of 175g force and 300 circles;
flexibility: scraping a sample according to GB T13217.1-2009 liquid ink color inspection method, folding the film layer by hand, and observing whether a crease exists;
viscosity: testing the viscosity of the ink at 25 ℃ by using an ink viscosity measuring instrument, wherein the unit is cps;
complete curing time: taking a plurality of pieces of coated paper, dripping 5 drops of printing ink on the surface of the coated paper by using a dropper, irradiating the coated paper by using a UVA-340 lamp tube for different time, selecting a 500g weight with a flat bottom surface, putting a plurality of silk cotton fibers on the surface cured by UV, pressing the weight on the cotton fibers for 2-3 min, removing the weight, and if the cotton fibers are not adhered to the surface, proving that the surface is completely cured, so that the complete curing time is obtained and is accurate to 0.1 s.
Wherein, in the test process of the adhesive force, the wear resistance and the flexibility, the curing condition of the ink is UVA-340 lamp tube irradiation for 30 s.
The test results are shown in the following table:
| adhesion/grade | Wear resistance | Flexibility | Viscosity/cps | Complete curing time/s | |
| Example 1 | 0 | Without falling off and incomplete | Without crease | 17000 | 2.1 |
| Example 2 | 0 | Without falling off and incomplete | Without crease | 20000 | 3.2 |
| Example 3 | 0 | Without falling off and incomplete | Without crease | 15800 | 1.5 |
| Example 4 | 0 | Without falling off and incomplete | Without crease | 16500 | 1.9 |
| Comparative example 1 | 2 | Falling off and obvious defect | Obvious crease mark | 17500 | 3.5 |
| Comparative example 2 | 3 | Without falling off and incomplete | Obvious crease mark | 21000 | 2.8 |
| Comparative example 3 | 1 | Without falling off and incomplete | Without crease | 18000 | 2.4 |
| Comparative example 4 | 0 | Without falling off and incomplete | Without crease | 14000 | 4.1 |
| Comparative example 5 | 0 | Without falling off and incomplete | Without crease | 17000 | 3.0 |
As can be seen from the above table, the UV ink of the present invention uses epoxy acrylate as a main prepolymer, which has characteristics of fast curing rate, strong adhesion, and softness, and further, the UV ink improves overall adhesion, flexibility, abrasion resistance, curing effect, and viscosity reduction by the synergistic effect of polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomaceous earth, defoamer, polyethylene wax, dispersant, colorant, and other additives.
The UV ink of example 1 has a great improvement in flexibility, abrasion resistance, adhesion, and curing effect compared to comparative example 1. The UV ink of example 1 of the present invention has much improved adhesion, flexibility, viscosity and curing time compared to comparative examples 2 and 3. Compared with comparative example 4, example 1 has higher curing efficiency though the viscosity is higher, and the specific reactive diluent adopted in example 1 is compounded to not only adjust the viscosity to a proper region, but also improve the curing efficiency. The curing efficiency of example 1 is higher compared to comparative example 5, which illustrates that the specific initiator formulation used in example 1 has a greater accelerating effect on the curing of the UV ink.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. A UV ink, characterized by: the feed comprises the following raw materials in parts by weight:
2. the UV ink of claim 1, wherein: the preparation method of the epoxy acrylate comprises the following steps:
(R1), taking 100 parts of epoxy resin, 33-36 parts of acrylic acid, 0.01-0.05 part of hydroquinone, 0.05-0.1 part of triethylamine and 10-30 parts of vinyl alkoxy silane oligomer according to parts by weight for later use;
(R2), mixing acrylic acid, hydroquinone and triethylamine to obtain a mixed solution;
(R3), heating the epoxy resin to 90-100 ℃ while stirring, then continuously dripping the mixed solution, and reacting for 2-4h at the temperature of 110-120 ℃ to obtain a semi-finished product;
(R4), adding vinyl alkoxy silane oligomer into the semi-finished product, stirring and reacting for 0.5-3h at the temperature of 50-100 ℃ under the catalysis of organic tin, carrying out reduced pressure distillation, washing, drying and filtering to obtain the epoxy acrylate.
3. The UV ink of claim 2, wherein: the epoxy resin is EP-12, EP-13, EP-16 or EP-20; the vinyl alkoxy silane oligomer is selected from
6598 or
6498。
4. The UV ink of claim 1, wherein: the polyester acrylate is selected from ARONIX M-8030 or Kotian 2101.
5. The UV ink of claim 1, wherein: the photoinitiator is at least two combinations of benzophenone, 2-isopropyl thioxanthone, 4-dimethylamino-ethyl benzoate and 2-dimethylamino-2-benzyl-1- [ -4 (4-morpholinyl) phenyl ] -1-butanone; the photosensitizer is benzoin dimethyl ether.
6. The UV ink of claim 1, wherein: the active diluent is at least two combinations of 2-methoxy ethyl acrylate, propenyl-2-ethyl ester, tripropylene glycol diacrylate, bisphenol alpha dimethacrylate and trimethylolpropane triacrylate.
7. The UV ink of claim 1, wherein: the particle size of the diatomite is 10-80 nm; the dispersant is Dispenser S15.
8. The UV ink of claim 1, wherein: the defoaming agent is BYK052, BYK-021 or BYK-024.
9. The UV ink of claim 1, wherein: the colorant is at least one of titanium dioxide, benzidine yellow, phthalocyanine blue, permanent red, pink, precious red, sun-proof dark red and carbon black.
10. A method of preparing a UV ink according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
(S1) taking epoxy acrylate, polyester acrylate, polydiallyl phthalate, photoinitiator, photosensitizer, reactive diluent, diatomite, defoaming agent, polyethylene wax, dispersing agent and coloring agent according to parts by weight for later use;
(S2), under the stirring condition, adding epoxy acrylate, polyester acrylate, polydiallyl phthalate, a dispersing agent, diatomite, a coloring agent, polyethylene wax and a defoaming agent into an active diluent, uniformly mixing, and grinding to the fineness of 15-25 μm to obtain a grinding material;
(S3), adding the photoinitiator and the photosensitizer into the grinding material, and uniformly mixing to obtain the UV ink.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249878A (en) * | 2022-01-19 | 2022-03-29 | 深圳市丽冠卓宏科技有限公司 | Resin for high-temperature-resistant low-yellowing UV (ultraviolet) ink and preparation method and application thereof |
| CN115466539A (en) * | 2022-09-13 | 2022-12-13 | 茂名阪田油墨有限公司 | Hot-stamping-resistant black ink |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114249878A (en) * | 2022-01-19 | 2022-03-29 | 深圳市丽冠卓宏科技有限公司 | Resin for high-temperature-resistant low-yellowing UV (ultraviolet) ink and preparation method and application thereof |
| CN114249878B (en) * | 2022-01-19 | 2024-06-21 | 深圳市丽冠卓宏科技有限公司 | High-temperature-resistant low-yellowing resin for UV (ultraviolet) ink as well as preparation method and application thereof |
| CN115466539A (en) * | 2022-09-13 | 2022-12-13 | 茂名阪田油墨有限公司 | Hot-stamping-resistant black ink |
| CN115466539B (en) * | 2022-09-13 | 2023-09-15 | 茂名阪田油墨有限公司 | Thermoprint-resistant black ink |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113416448B (en) | 2023-06-09 |
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