CN114736556B - High-glossiness UV offset printing ink and preparation method thereof - Google Patents
High-glossiness UV offset printing ink and preparation method thereof Download PDFInfo
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- CN114736556B CN114736556B CN202210468837.3A CN202210468837A CN114736556B CN 114736556 B CN114736556 B CN 114736556B CN 202210468837 A CN202210468837 A CN 202210468837A CN 114736556 B CN114736556 B CN 114736556B
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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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- 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
- C09D11/06—Printing inks based on fatty oils
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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
Abstract
The application relates to the technical field of materials, and in particular discloses a high-glossiness UV offset printing ink and a preparation method thereof, wherein the UV offset printing ink comprises the following components in percentage by weight: 10-15% of epoxidized soybean oil, 25-30% of ultraviolet curing resin, 20-25% of diluent, 8-15% of photoinitiator, 0.5-1.5% of talcum powder, 0.5-1% of polyethylene wax and 20-25% of other auxiliary materials. The application has the advantage of improving the glossiness of the UV offset printing ink.
Description
Technical Field
The application relates to the technical field of chemical materials, in particular to a high-glossiness UV offset printing ink and a preparation method thereof.
Background
UV offset inks are novel inks that crosslink with binders under UV radiation at a wavelength to change the ink from a liquid state to a solid state. The UV offset ink can remarkably reduce VOC, and in recent years, as the requirements of people on environmental protection are higher and higher, the UV offset ink is more and more valued, and consumers adopting the UV offset ink to replace the traditional common offset ink are more and more.
With the increasing requirements of printing processes, printing stock and other materials, the technical conditions required for UV offset printing ink are also improved in order to match with different printing stock and printing processes. As the main printing substrate on the market today, there are papers, films, fabrics, metals, ceramics, etc. The paper material can be divided into newsprint, letterpress paper, offset paper, coated paper, aluminum platinum paper, special paper and the like; the film material includes PVC, PE, PET, PP, OPP, ABS, PA and the like. Different printing substrates have different material structures and different surface treatment modes, so that the surface tension of the printing substrates is different, and the same ink can show different adhesiveness on different printing substrates. For printed products, adhesion is the most basic condition to be met, and in order to ensure that the ink has sufficient adhesion on the printed substrate, the adhesion of the UV offset ink on the printed substrate must be improved without delamination or falling off. In addition, the surface hardness of the ink printed on the card is high, the friction resistance is good, otherwise, the printed card is easy to be scratched and damaged; in cosmetic packaging, in order to draw attention to the commodity, it is necessary to select an ink which is beautiful in color, not easy to fade, and excellent in glossiness. Otherwise, the glossiness of the product is lower, so that the product not only affects the attractiveness, but also looks old, and the impression of consumers on commodities is greatly reduced.
However, the related UV offset ink still has many problems such as poor glossiness and low adhesion, which are easy to cause the defects of delamination and falling off on the substrate, and meanwhile, the material is easy to wear during the use process, so that the performance is reduced, which needs to be solved.
Disclosure of Invention
In order to improve the adhesive force and the glossiness of the UV offset printing ink, the application provides the UV offset printing ink with high glossiness and a preparation method thereof.
In a first aspect, the application provides a high-glossiness UV offset ink, which adopts the following technical scheme: the high-glossiness UV offset ink comprises the following components in percentage by weight: 10-15% of epoxidized soybean oil, 25-30% of ultraviolet curing resin, 20-25% of diluent, 8-15% of photoinitiator, 0.5-1.5% of talcum powder, 0.5-1% of polyethylene wax and 20-25% of other auxiliary materials.
By adopting the technical scheme, the epoxidized soybean oil has the characteristics of high adhesive force, high viscosity and environmental protection, and is added into the ink as a connecting material, so that the prepared ink has better film forming performance and strength. Meanwhile, the epoxidized soybean oil and the ultraviolet light curing resin can generate a synergistic effect, and under the combined action of the diluent, the leveling property of the ultraviolet light curing resin is improved, so that the ultraviolet light curing resin and the photoinitiator are fully reacted, and the ultraviolet light curing resin is cured into tough printing ink with high glossiness; the talcum powder has a layered structure, so that the dispersion performance of other components in the ink can be improved, and meanwhile, the glossiness of the ink can be further improved; the polyethylene wax is used as a lubricant, so that the glossiness and the processability of the prepared ink can be improved, and meanwhile, the hardness of the ink is improved, and the wear resistance is further improved.
According to the application, by adding the epoxidized soybean oil and the ultraviolet light curing resin and utilizing the high adhesive force, high viscosity and environmental protection characteristics of the epoxidized soybean oil, a certain synergistic effect is generated between the epoxidized soybean oil and the ultraviolet light curing resin, and meanwhile, the thinner, the photoinitiator, the talcum powder, the polyethylene wax and other auxiliary materials are added, so that the adhesive force and the glossiness of the UV offset printing ink are obviously and effectively improved.
Preferably, the diluent is trimethylolpropane triacrylate, which can reduce the viscosity of the ink, play a certain role in dispersion, and can also participate in the curing and crosslinking reaction of the ultraviolet light curing resin, so that the glossiness and toughness of the ink are improved, and the defects of layering and falling off of the ink on a substrate are reduced.
Preferably, the UV offset ink comprises the following components in weight percent: 12-14% of epoxidized soybean oil and 28-30% of ultraviolet curing resin.
Preferably, the UV offset ink comprises the following components in weight percent: 12.7% of epoxidized soybean oil and 28% of ultraviolet curing resin.
The inventor of the present application has found that the adhesive force and the glossiness of the UV offset ink can be further improved by adopting the above-mentioned ratio by adjusting the ratio between the epoxidized soybean oil and the UV curable resin.
Preferably, the ultraviolet light curing resin comprises polyester acrylate and soybean oil acrylate.
Preferably, the weight ratio of the polyester acrylate to the soybean oil acrylate is 1-3:4-6.
In some embodiments, the weight ratio of polyester acrylate to soybean oil acrylate may be 1-2:4-6, 2-3:4-6, 1-3:5-6, 1-3:4-5, 2-3:5-6, 2-3:4-5.
In a specific embodiment, the weight ratio of polyester acrylate to soybean oil acrylate may be 1:4, 2:5, 3:4, 3:5.
By adopting the technical scheme, the polyester acrylic ester can improve the toughness of the ink pair and improve the adhesive force of the ink; the soybean oil acrylate has the characteristics of environmental friendliness and low cost, and the ink prepared from the soybean oil acrylate has lower viscosity and higher flexibility. And the polyester acrylic resin and the soybean oil acrylic ester are used cooperatively, so that the leveling property of the ink can be further improved, and the glossiness of the UV offset ink is improved.
Preferably, the preparation method of the soybean oil acrylic ester comprises the following steps: adding 95-100 parts of acrylic acid into a four-neck flask, respectively adding 1-1.5 parts of triphenylphosphine and 0.1-0.5 part of p-hydroxyanisole, uniformly stirring, heating to 100-110 ℃, then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1-1.5:1, dropwise adding for 1h, reacting at the constant temperature of 100-110 ℃ for 6-8h after dropwise adding, then adding 2-25 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, and cooling to obtain the soybean oil acrylate.
In some embodiments, the weight ratio of epoxidized soybean oil to acrylic acid can be 1-1.2:1, 1.2-1.5:1.
In a specific embodiment, the weight ratio of epoxidized soybean oil to acrylic acid may also be 1.1:1, 1.2:1, 1.3:1, 1.4:1.
In some specific embodiments, the triethylene glycol dimethacrylate can be 2-15 parts, 15-25 parts.
In a specific embodiment, the triethylene glycol dimethacrylate can be 3,4,5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 or 24 parts.
In the preparation process of the soybean oil acrylic ester, triethylene glycol dimethacrylate is added to modify the soybean oil acrylic ester, so that the weather resistance, solvent resistance and friction resistance of the ink prepared from the soybean oil acrylic ester can be effectively improved, and meanwhile, the adhesive force and glossiness of the ink are effectively improved.
Preferably, the photoinitiator comprises 2-hydroxy-2-methyl-1-phenylpropion, 1-hydroxycyclohexylphenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide in a weight ratio of 3-4:1-3:2-4:2-3.
In some specific embodiments, the weight ratio of 2-hydroxy-2-methyl-1-phenylpropion, 1-hydroxycyclohexylphenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide may be: 3-3.5:1-3:2-4:2-3, 3.5-4:1-3:2-4:2-3, 3-4:1-2:2-4:2-3, 3-4:2-3, 3-4:1-3:3-4:2-3, 3-4:1-3:2-3:2-3, 3-3.5:1-2:2-4:2-3, 3-3.5:2-3:2-4:2-3, 3-3.5:1-3:2-3:2-3, 3-3.5:1-3:3-4:2-3, 3.5-4:1-2:2-4:2-3, 3.5-4:2-3:2-4:2, 3.5-3:2-3:2-3, 3.5-3:2-4:2-3, 3.5-3:2-3:2-3.
In a specific embodiment, the weight ratio of the 2-hydroxy-2-methyl-1-phenylpropion, 1-hydroxycyclohexylphenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, and 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide may be: 3:1:2:2, 3:1:2:3, 4:1:2:3, 4:2:2:3, 4:3:2:3, 3.5:3:4:2.
Through the cooperative coordination among 2-hydroxy-2-methyl-1-phenylpropion, 1-hydroxycyclohexyl phenyl ketone, 2,4, 6-trimethylbenzoyl phenyl ethyl phosphonate and 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, the photoinitiator can generate more free radicals under the condition of illumination, and transfer energy to ultraviolet light curing resin, so that polyester acrylate and soybean oil acrylate prepolymer and monomer generate chain reaction under the impact of free particles to generate a tough ink film, and the glossiness of the cured ink is improved.
Preferably, the other auxiliary materials comprise pigments, fillers and dispersants.
Preferably, the pigment is carbon black; the filler is magnesium carbonate; the dispersing agent is a Lubo 24000 dispersing agent.
By adopting the technical scheme, the pigment determines the weather resistance and the transparency of the ink, and the physical and chemical properties of the carbon black also adjust the viscosity, the drying property, the durability, the wear resistance, the printing quality and the like of the ink system.
Magnesium carbonate is used as a filler and is a fine white powder solid substance, and on one hand, the magnesium carbonate can be used for adjusting the consistency, viscosity, fluidity, yield value and other ink properties of the ink; on the other hand, the ink has the function of adjusting the concentration and the glossiness of the ink, namely, when the ink has large concentration and deep color, the ink can be diluted after being added with the filler, so that the glossiness of the ink is improved, and meanwhile, the filler also has the characteristics of light resistance, heat resistance, solvent resistance, low price and the like.
Meanwhile, the road-blooding 24000 dispersing agent is added into the ink, so that the interface state of the ink liquid system can be obviously changed, the system is promoted to be stable and uniformly dispersed, the fluidity of the ink is further increased, the uniformity of ink distribution is facilitated, the brightness of an ink film can be greatly improved, and the ink layer has certain good effects of wear resistance, sun resistance and fading prevention.
In a second aspect, the application provides a high-glossiness UV offset printing ink and a preparation method thereof, and the technical scheme is as follows:
a preparation method of high-glossiness UV offset printing ink comprises the following steps: 10-15% of epoxidized soybean oil, 25-30% of ultraviolet curing resin, 20-25% of diluent, 8-15% of photoinitiator, 0.5-1.5% of talcum powder, 0.5-1% of polyethylene wax and 20-25% of other auxiliary materials are weighed according to a proportion, pre-dispersed for 20-30min, the temperature is controlled to be 50-60 ℃ in the pre-dispersion process, the rotating speed is controlled to be 500-600 r/min, and then the UV offset printing ink is obtained after rolling for 3-5 times at 50-60 ℃.
By adopting the technical scheme, the preparation method of the application firstly pre-disperses all ingredients so that all the ingredients can be uniformly dispersed, and then the ink is rolled for 30-5 times so that the fineness of the prepared ink is finer, thereby further increasing the leveling property of the ink and improving the adhesive force and glossiness of the ink.
In summary, the application has the following beneficial effects:
1. according to the application, by adding the epoxidized soybean oil and the ultraviolet light curing resin and utilizing the high adhesive force, high viscosity and environmental protection characteristics of the epoxidized soybean oil, a certain synergistic effect is generated between the epoxidized soybean oil and the ultraviolet light curing resin, and meanwhile, the thinner, the photoinitiator, the talcum powder, the polyethylene wax and other auxiliary materials are added, so that the adhesive force and the glossiness of the UV offset printing ink are obviously and effectively improved.
2. By adding triethylene glycol dimethacrylate to modify the soybean oil acrylate, the weather resistance, solvent resistance and friction resistance of the ink prepared from the soybean oil acrylate can be effectively improved, and meanwhile, the adhesive force and glossiness of the ink are effectively improved.
3. According to the preparation method disclosed by the application, each ingredient is pre-dispersed firstly, so that each component can be uniformly dispersed, and then the ink is rolled for 30-5 times, so that the fineness of the prepared ink is finer, the leveling property of the ink is further improved, and the adhesive force and glossiness of the ink are improved.
Drawings
FIG. 1 is a flow chart of a method provided by the present application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples.
The main raw materials in the application are as follows:
talcum powder was purchased from Shanghai Kangqiong Biotechnology Co., ltd and had an average particle size of 3000 mesh.
The magnesium carbonate is light magnesium carbonate, and is purchased from Jinan Sheng and chemical industry Co., ltd, and the average particle size is 3000 meshes.
Trimethylolpropane triacrylate was purchased from Qingdao Ruinasi Polymer materials Co., ltd., CAS number 15625-89-5.
The dispersing agent is a Lubo 24000 dispersing agent.
2-hydroxy-2-methyl-1-phenylpropionic acid was purchased from Zhejiang shou Fu chemical industry trade Co., ltd., model number photo initiator 1173, CAS number 7473-98-5.
1-hydroxycyclohexyl phenyl ketone is purchased from Zhejiang shou Fu chemical industry trade company, model number is photoinitiator 184, and CAS number is 947-19-3.
Ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate was purchased from sea-filling technologies, inc. In thai, product number: 1065449 CAS number 84434-11-7.
2,4, 6-trimethylbenzoyl-diphenylphosphine oxide was purchased from Jinan Lu Xin chemical technology Co., ltd, and the model was photoinitiator TPO, with CAS number 75980-60-8.
Polyethylene wax was purchased from Tianjin Heng Cheng Xinyuan International trade company.
Epoxidized soybean oil was purchased from Shanghai Meilin Biochemical technologies Co., ltd. Under the product number E808876 and CAS number 8013-07-8.
Acrylic acid was purchased from Shanghai Ala Biochemical technologies Co., ltd, product number A103526, CAS number 79-10-7.
Triphenylphosphine was purchased from Beijing coupling technologies Co., ltd, CAS number 603-35-0.
Para-hydroxyanisole was purchased from Yonghua chemical Co., ltd., CAS number 150-76-5.
The polyester acrylate is purchased from Jiangsu Kaifeng Ruiyang chemical Co., ltd, and the product model is RY3301.
The specific description is: the apparatus, materials, reagents and the like used in the following examples, which are not specifically described, are commercially available, unless otherwise specified, by carrying out the operations under conventional conditions or under conditions recommended by the manufacturer.
Preparation example of soybean oil acrylate
Preparation example 1
The preparation method of the soybean oil acrylic ester comprises the following steps: 95 parts of acrylic acid is added into a four-neck flask provided with a stirrer, a thermometer and a condenser, 1 part of catalyst triphenylphosphine and 0.5 part of p-hydroxyanisole as polymerization inhibitor are respectively added, the mixture is stirred uniformly and then heated to 100 ℃, and then epoxidized soybean oil is added dropwise, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1:1, dropwise adding for 1h, reacting at 100 ℃ for 8h after dropwise adding, adding 25 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, cooling, adding ethyl acetate, extracting an organic layer, removing unreacted acrylic acid in the organic layer by using saturated NaHCO (sodium carbonate) solution until the water layer is alkaline, washing the organic layer to be neutral by using saturated NaCl solution, and finally using anhydrous Na (sodium carbonate) 2 SO 4 The organic layer was dried and ethyl acetate was removed by rotary evaporation to give soybean oil acrylate.
Preparation example 2
The preparation method of the soybean oil acrylic ester comprises the following steps: 98 parts of acrylic acid is added into a four-neck flask provided with a stirrer, a thermometer and a condenser, 1.2 parts of catalyst triphenylphosphine and 0.3 part of p-hydroxyanisole as a polymerization inhibitor are respectively added, the temperature is raised to 105 ℃ after uniform stirring, and then epoxidized soybean oil is added dropwise, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1.2:1, dropwise adding for 1h, reacting at 105 ℃ for 7h after dropwise adding, adding 2 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, cooling, adding ethyl acetate, extracting an organic layer, removing unreacted acrylic acid in the organic layer by using saturated NaHCO (sodium carbonate) solution until the water layer is alkaline, washing the organic layer to be neutral by using saturated NaCl solution, and finally using anhydrous Na (sodium carbonate) 2 SO 4 The organic layer was dried and ethyl acetate was removed by rotary evaporation to give soybean oil acrylate.
Preparation example 3
The preparation method of the soybean oil acrylic ester comprises the following steps: adding 100 parts of acrylic acid into a four-neck flask with a stirrer, a thermometer and a condenser, respectively adding 1.5 parts of catalyst triphenylphosphine and 0.1 part of p-hydroxyanisole serving as a polymerization inhibitor, stirring uniformly, heating to 110 ℃, then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1.5:1, dropwise adding for 1h, reacting at the constant temperature of 110 ℃ for 6h after dropwise adding, then adding 15 parts of triethylene glycol dimethacrylate, stirring for 5min continuously, stopping heating, cooling, adding ethyl acetate, extracting an organic layer, removing unreacted acrylic acid in the organic layer until a water layer is alkaline, washing the organic layer to be neutral by using saturated NaHCO (sodium chloride) solution, and finally washing the organic layer to be neutral by using anhydrous Na (sodium chloride) 2 SO 4 The organic layer was dried and ethyl acetate was removed by rotary evaporation to give soybean oil acrylate.
Preparation example 4
Preparation example 4 differs from preparation example 3 in that triethylene glycol dimethacrylate was not added.
Examples
Example 1
The high-glossiness UV offset ink comprises the following components in percentage by weight:
10% of epoxidized soybean oil, 30% of ultraviolet light curing resin, 25% of trimethylolpropane triacrylate, 9% of photoinitiator, 1% of talcum powder, 1% of polyethylene wax, 20% of carbon black, 3% of magnesium carbonate and 1% of road-run 24000 dispersing agent.
Wherein the ultraviolet light curing resin comprises polyester acrylic ester and soybean oil acrylate in preparation example 1, and the weight ratio of the polyester acrylic ester to the soybean oil acrylate is 1:4; the photoinitiator comprises 2-hydroxy-2-methyl-1-phenylpropione, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide in a weight ratio of 3:1:2:2.
The UV offset printing ink is prepared by adopting the following preparation method:
weighing the ingredients according to a proportion, pre-dispersing for 20min in a pre-dispersing large tank, controlling the temperature to be 60 ℃ in the pre-dispersing process, controlling the rotating speed to be 600 revolutions per minute, and then rolling for 3-5 times on an inclined three-roller machine at 50-60 ℃ to reach the fineness of less than 7.5UM standard, thus obtaining the UV offset printing ink.
Examples 2 to 7
Examples 2-7 each provided a high gloss UV offset ink differing from example 1 in the composition ratio of the components in the UV offset ink, as shown in table 1.
Table 1 batching Table of UV offset inks (%)
| Examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Epoxidized soybean oil | 10 | 10 | 10 | 15 | 12 | 14 | 12.7 |
| Ultraviolet light curing resin | 30 | 30 | 30 | 25 | 28 | 26 | 28 |
| Trimethylolpropane triacrylate | 25 | 25 | 20.2 | 21.7 | 21.7 | 21.7 | 21 |
| Photoinitiator | 9 | 10 | 14 | 12.5 | 12.5 | 12.5 | 12.5 |
| Talc powder | 1 | 0.5 | 1 | 1 | 1 | 1 | 1 |
| Polyethylene wax | 1 | 0.5 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 |
| Carbon black | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Magnesium carbonate | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Lu Borun 24000 dispersant | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Examples 8 to 14
Examples 8-14 each provided a high gloss UV offset ink differing from example 7 in the weight ratio of polyester acrylate to soybean oil acrylate in the UV curable resin, as shown in table 2.
TABLE 2 weight ratio of polyester acrylate to soybean oil acrylate in examples 7 to 14
In the table "/" represents no addition.
Examples 15 to 17
Examples 15-17 each provided a high gloss UV offset ink, differing from example 9 in the preparation of soybean oil acrylate, as shown in table 3.
Table 3 preparation examples of soybean oil acrylates in examples 9, 15-17
| Examples | Soybean oil acrylic ester |
| 9 | Preparation example 1 |
| 15 | Preparation example 2 |
| 16 | Preparation example 3 |
| 17 | Preparation example 4 |
Examples 18 to 28
Examples 18-28 each provide a high gloss UV offset ink differing from example 16 in the weight ratio of 2-hydroxy-2-methyl-1-phenylpropion, 1-hydroxycyclohexylphenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide in the photoinitiator, as shown in Table 4.
Table 4 proportions of photoinitiators in examples 18 to 28
In the table "/" represents no addition.
Comparative example
Comparative example 1
The commercial 161 ink is available from Beijing gold printing company International supply chain management Co.
Comparative example 2
A high gloss UV offset ink differs from example 1 in that the UV offset ink has 30% epoxidized soybean oil and 10% UV curable resin.
Comparative example 3
A high gloss UV offset ink differs from example 1 in that the UV offset ink has 2% epoxidized soybean oil and 38% UV curable resin.
Comparative example 4
A high gloss UV offset ink differs from example 1 in that an equal weight of UV curable resin is used instead of epoxidized soybean oil.
Performance test
Detection method
Ink tack determination: measured by the ink viscosity test method of GB/T14624.5-1993.
Ink fluidity measurement: the measurement was carried out by using a parallel plate viscometer in the GB/T13217.4-2020 ink viscosity test method.
The glossiness detection experimental method comprises the following steps:
experiment machine: IGT (IGT)
Experimental conditions: printing pressure: 400N/m
157 g coated paper
The experimental method comprises the following steps: 0.5 g of ink is weighed on an inking roller, fully homogenized for 2 minutes and color development is carried out.
The gloss was measured with a 60 degree spectrophotometer.
Adhesion detection
According to the specification of GB/T9286-1988 'cross-cut test of color paint and varnish film', the adhesive force of ultraviolet light curing film is measured by adopting a standard cross-cut method-adhesive tape method, and the test results are 0,1,2,3,4 and 5, and are the best of 0 grade and the worst of 5 grade.
Flexibility is measured by visually inspecting whether or not there is a crack by folding the substrate in half.
The water resistance, ethanol resistance, acid resistance and alkali resistance of the UV offset printing ink are detected by adopting a QB 568-1983 ink ethanol resistance, alkali resistance, acid resistance and water resistance detection method (soaking method), and the detection standard is required to reach more than 3 levels.
Hardness test the hardness of the ultraviolet-cured coating was measured by using a QHQ-A portable pencil scratch tester as specified in GB/T6739-2006 pencil test for hardness of coating film. Ink hardness is classified as soft, 6B, 4B, 3H, 2B, B, HB, H, 2H, 3H, 4H, 6H, hard.
The test results are shown in Table 5.
TABLE 5 UV offset ink Performance test results for examples 1-29 and comparative examples 1-4
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It can be seen by combining examples 1-29 and comparative examples 1-4 and by combining Table 5 that the UV flexographic inks prepared according to the present application significantly improved adhesion and gloss over the 161-type inks commonly used in the market. The fineness of the UV offset printing ink prepared by the method meets the inspection standard, the viscosity and the fluidity are moderate, and the UV offset printing ink has good printing and using performances, so that the UV offset printing ink can be well matched with a base material, the defects of layering and falling are reduced, and meanwhile, the UV offset printing ink is strong in adhesive force and abrasion-resistant; the folding is free of cracks, and the flexibility is good; the printing product has the advantages of high water resistance, ethanol resistance and other organic solvents, acid and alkali resistance, long storage time, stability, beautiful color, difficult fading and excellent glossiness.
As can be seen from examples 1-3 and table 5, the change of the proportions of trimethylolpropane triacrylate, photoinitiator, talcum powder and polyethylene wax in the ink can affect the glossiness of the ink, because the talcum powder has a layered structure, the dispersibility of other components in the ink can be improved, and meanwhile, the glossiness of the ink can be further improved; the polyethylene wax is used as a lubricant, so that the glossiness and the processability of the prepared ink can be improved, and meanwhile, the hardness of the ink is improved, and the wear resistance is further improved.
It can be seen from the combination of examples 4 to 7 and comparative examples 2 to 4 and the combination of table 5 that the ratio of epoxidized soybean oil to uv curable resin can affect the adhesion and gloss of the ink. The reason is that the epoxidized soybean oil and the ultraviolet light curing resin can generate a synergistic effect, and the leveling property of the ultraviolet light curing resin is improved under the combined action of the diluent, so that the ultraviolet light curing resin and the photoinitiator are fully reacted, and the ultraviolet light curing resin is cured into tough printing ink and has high glossiness. Among them, the ink prepared in example 7 had a glossiness of 57, an adhesion of 1, and a hardness of 2H.
As can be seen from the combination of examples 7 to 14 and table 5, the weight ratio of the polyester acrylate to the soybean oil acrylate in the uv curable resin can affect the adhesion and glossiness of the ink, and the polyester acrylate can improve the toughness of the ink pair and improve the adhesion of the ink; the soybean oil acrylate has the characteristics of environmental friendliness and low cost, and the ink prepared from the soybean oil acrylate has lower viscosity and higher flexibility. And the polyester acrylic resin and the soybean oil acrylic ester are used cooperatively, so that the leveling property of the ink can be further improved, and the glossiness of the UV offset ink is improved. In example 9, the weight ratio of polyester acrylate to soybean oil acrylate was 3:4, and the ink had a gloss of 59, an adhesion of 1, and a hardness of 2H.
As can be seen by combining examples 9, 15-17 and Table 5, the preparation method of soybean oil acrylate can affect the adhesive force and glossiness of the ink, wherein the soybean oil acrylate in preparation example 4 is adopted in example 17, the acrylic resin in preparation example 4 does not adopt triethylene glycol dimethacrylate to modify the soybean oil acrylate in the preparation process, and various properties of the prepared ink can be seen to be reduced to different degrees, which indicates that the modification of the soybean oil acrylate by the triethylene glycol dimethacrylate has an important effect on the ink properties. According to the application, triethylene glycol dimethacrylate is added to modify the ink, so that the weather resistance, solvent resistance and friction resistance of the ink prepared from the soybean oil acrylate can be effectively improved, and meanwhile, the adhesive force and glossiness of the ink are effectively improved.
By combining examples 16, 18-28 and combining Table 5, it can be seen that the choice of photoinitiator components and the proportions of the components can affect the adhesion and gloss of the ink, and the application can improve the gloss of the ink after curing by the synergistic combination of 2-hydroxy-2-methyl-1-phenylpropionic acid, 1-hydroxycyclohexylphenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, and the photoinitiator can generate more free radicals under the condition of illumination, and transfer energy to the ultraviolet curing resin, so that the polyester acrylate and soybean oil acrylate prepolymer and the monomer undergo chain reaction under the impact of free particles to generate a tough ink film. In example 22, when the weight ratio of 2-hydroxy-2-methyl-1-phenylpropion, 1-hydroxycyclohexylphenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide was 3.5:3:4:2, the ink glossiness reached 63, the adhesion was 0, and the hardness was 4H, which is the best example of the present application.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present application, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the application, and are also considered to be within the scope of the application.
Claims (7)
1. The high-glossiness UV offset ink is characterized by comprising the following components in percentage by weight: 10-15% of epoxidized soybean oil, 25-30% of ultraviolet light curing resin, 20-25% of diluent, 8-15% of photoinitiator, 0.5-1.5% of talcum powder, 0.5-1% of polyethylene wax and 20-25% of other auxiliary materials;
the ultraviolet light curing resin comprises polyester acrylate and soybean oil acrylate in a weight ratio of 1-3:4-6;
the preparation method of the soybean oil acrylic ester comprises the following steps: adding 95-100 parts of acrylic acid into a four-neck flask, respectively adding 1-1.5 parts of triphenylphosphine and 0.1-0.5 part of p-hydroxyanisole, uniformly stirring, heating to 100-110 ℃, then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1-1.5:1, dropwise adding for 1h, reacting at the constant temperature of 100-110 ℃ for 6-8h after dropwise adding, then adding 2-25 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, and cooling to obtain the soybean oil acrylate.
2. The high gloss UV offset ink of claim 1, wherein: comprises the following components in percentage by weight: 12-14% of epoxidized soybean oil and 28-30% of ultraviolet curing resin.
3. The high gloss UV offset ink of claim 1, wherein: comprises the following components in percentage by weight: 12.7% of epoxidized soybean oil and 28% of ultraviolet curing resin.
4. A high gloss UV offset ink according to any one of claims 1-3, characterized in that: the photoinitiator comprises 2-hydroxy-2-methyl-1-phenylpropione, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide in a weight ratio of 3-4:1-3:2-4:2-3.
5. A high gloss UV offset ink according to any one of claims 1-3, characterized in that: the other auxiliary materials comprise pigment, filler and dispersing agent.
6. The high gloss UV offset ink of claim 5, wherein: the pigment is carbon black; the filler is magnesium carbonate; the dispersing agent is a Lubo 24000 dispersing agent.
7. A method for preparing the high gloss UV offset ink according to any one of claims 1-6, comprising the steps of: 10-15% of epoxidized soybean oil, 25-30% of ultraviolet curing resin, 20-25% of diluent, 8-15% of photoinitiator, 0.5-1.5% of talcum powder, 0.5-1% of polyethylene wax and 20-25% of other auxiliary materials are weighed according to a proportion, pre-dispersed for 20-30min, the temperature is controlled to be 50-60 ℃ in the pre-dispersion process, the rotating speed is controlled to be 500-600 r/min, and then the UV offset printing ink is obtained after rolling for 3-5 times at 50-60 ℃.
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