CN114736556A - 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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- 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
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Abstract
The application relates to the technical field of materials, and particularly discloses a high-gloss UV offset printing ink and a preparation method thereof, wherein the high-gloss 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 high-glossiness UV offset printing ink and a preparation method thereof.
Background
The UV offset printing ink is a novel printing ink, and can perform a crosslinking reaction with a binder under the irradiation of ultraviolet light with a certain wavelength, so that the printing ink is changed from a liquid state to a solid state for solidification. The UV offset printing ink can obviously reduce VOC, in recent years, along with the higher and higher requirements of people on environmental protection, the UV offset printing ink is more and more valued, and more consumers adopt the UV offset printing ink to replace the traditional common offset printing ink.
With the increasing requirements of printing processes, printing materials and other printing processes, the technical conditions required by the UV offset printing ink are increased in order to match different printing materials and printing processes. For example, the main printing substrates on the market are paper, film, fabric, metal, ceramic, etc. Wherein the paper material can be classified into newsprint, embossed paper, offset paper, coated paper, aluminum foil paper, special paper and the like; the film material comprises PVC, PE, PET, PP, OPP, ABS, PA and the like. Different printing substrates have different surface tensions due to different material structures and surface treatment modes, and the same ink can show different adhesions on different printing substrates. For printed products, adhesion is the most basic condition to be satisfied, and in order to ensure that the ink has sufficient adhesion on the printing substrate, does not cause delamination and falling off, the adhesion of the UV offset ink on the printing substrate must be improved. In addition, the surface hardness of the ink printed on the card is high, and the friction resistance is good, otherwise, the printed card is easy to scratch and damage; in order to attract the attention of consumers to commodities, the cosmetic packaging needs to select the ink which is beautiful in color, not easy to fade and excellent in glossiness. Otherwise, the product has low glossiness, thereby not only affecting the aesthetic degree, but also having old feeling, and greatly reducing the impression of consumers on the commodities.
However, the comprehensive performance of the UV offset printing ink still has many problems, such as poor glossiness and low adhesion, which easily causes the disadvantages of peeling and peeling on the substrate, and meanwhile, the material is easily worn during the use process to cause performance reduction, thus urgent solution is needed.
Disclosure of Invention
In order to improve the adhesive force and glossiness of the UV offset printing ink, the application provides the UV offset printing ink with high glossiness and the preparation method thereof.
In a first aspect, the present application provides a high gloss UV offset ink, which adopts the following technical scheme: a high-gloss 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.
By adopting the technical scheme, the epoxy soybean oil has the characteristics of high adhesive force, high viscosity and environmental protection, and is added into the ink as a binder, so that the prepared ink has good film-forming property and strength. Meanwhile, the epoxidized soybean oil and the ultraviolet curing resin can generate a synergistic effect, and under the combined action of the diluent, the leveling property of the ultraviolet curing resin is improved, so that the ultraviolet curing resin and the photoinitiator are fully reacted, and the ultraviolet curing resin is cured into tough ink with high glossiness; the talcum powder has a layered structure, so that the dispersing performance of other components in the ink can be improved, and meanwhile, the glossiness of the ink can be further improved; and 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 further, the wear resistance is improved.
According to the UV offset printing ink, epoxidized soybean oil and ultraviolet curing resin are added, and the high adhesive force, high viscosity and environmental protection characteristics of the epoxidized soybean oil are utilized, so that a certain synergistic effect is generated between the epoxidized soybean oil and the ultraviolet curing resin, and meanwhile, a diluent, a photoinitiator, talcum powder, 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, and the trimethylolpropane triacrylate can reduce the viscosity of the ink, play a certain role in dispersion, participate in the curing and crosslinking reaction of the ultraviolet curing resin, further improve the glossiness and toughness of the ink, and reduce the defects of layering and falling off of the ink on a substrate.
Preferably, the UV offset printing ink comprises the following components in percentage by weight: 12-14% of epoxidized soybean oil and 28-30% of ultraviolet curing resin.
Preferably, the UV offset printing ink comprises the following components in percentage by weight: 12.7% of epoxidized soybean oil and 28% of ultraviolet curing resin.
The inventor of the application discovers that the adhesive force and the glossiness of the UV offset printing ink can be further improved by adjusting the ratio between the epoxidized soybean oil and the ultraviolet curing resin.
Preferably, the ultraviolet curable resin includes 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 the polyester acrylate to the 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 particular embodiment, the weight ratio of the polyester acrylate to the soybean oil acrylate may be 1:4, 2:5, 3:4, 3: 5.
By adopting the technical scheme, the polyester acrylate can improve the toughness of the printing ink pair and improve the adhesive force of the printing ink; the soybean oil acrylate has the characteristics of environmental friendliness and low cost, and the ink prepared from the soybean oil acrylate has low viscosity and high flexibility. And the polyester acrylic resin and the soybean oil acrylate are cooperatively used, 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 acrylate 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 110 ℃ below zero, then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1-1.5:1, the dropwise adding time is 1h, reacting at 110 ℃ below zero for 6-8h after the dropwise adding is finished, 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 may 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 embodiments, the triethylene glycol dimethacrylate may be 2 to 15 parts, 15 to 25 parts.
In a specific embodiment, the triethylene glycol dimethacrylate may be 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21, 22 parts, 23 parts, or 24 parts.
In the preparation process of the soybean oil acrylate, the soybean oil acrylate is modified by adding the triethylene glycol dimethacrylate, so that the weather resistance, the solvent resistance and the friction resistance of the ink prepared from the soybean oil acrylate can be effectively improved, and the adhesive force and the glossiness of the ink are effectively improved.
Preferably, the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide in a weight ratio of 3-4:1-3:2-4: 2-3.
In some embodiments, the weight ratio of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenylketone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, 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, 3-4:2-3:2-4:2-3, 3-4:1-3:3-4:2-3, 3-4:1-3:2-3, 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: 3-4:2-3, 3.5-4:1-2:2-4:2-3, 3.5-4:2-3:2-4:2-3, 3.5-4:1-3:2-3:2-3, 3.5-4:1-3:3-4: 2-3.
In a specific embodiment, the weight ratio of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexylphenylketone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide may be: 3:1:2:2, 3:1:2:3, 4:2:2:3, 4:3:2:3, 3.5:3:4: 2.
Through the synergistic cooperation of 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, 2,4, 6-trimethyl benzoyl phenyl ethyl phosphonate and 2,4, 6-trimethyl benzoyl diphenyl phosphine oxide, the photoinitiator can generate more free radicals under the condition of illumination, and energy is transferred to ultraviolet curing resin, so that polyester acrylate, soybean oil acrylate prepolymer and monomers generate chain reaction under the impact of free particles to generate tough ink films, and meanwhile, the glossiness of the cured ink is improved.
Preferably, the other adjuvants include pigments, fillers and dispersants.
Preferably, the pigment is carbon black; the filler is magnesium carbonate; the dispersant is Luborun 24000 dispersant.
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 an ink system.
Magnesium carbonate is a fine white powder solid substance as a filler, and on one hand, the magnesium carbonate can adjust the ink properties such as the consistency, viscosity, fluidity, yield value and the like of the ink; on the other hand, the ink can adjust the concentration and the glossiness of the ink, namely, when the concentration of the ink is high and the color phase is deep, the filling material can be added to achieve the thinning effect, so that the glossiness of the ink is improved, and meanwhile, the filling material has the characteristics of light resistance, heat resistance, solvent resistance, low price and the like.
Meanwhile, the Luobu 24000 dispersant is added into the ink, so that the interface state of an ink liquid system can be obviously changed, the stability and the uniform dispersion of the system are promoted, 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-gloss UV offset printing ink and a preparation method thereof, and the following technical scheme is adopted:
a preparation method of high-glossiness UV offset printing ink comprises the following steps: weighing 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 according to the proportion, pre-dispersing for 20-30min, controlling the temperature to be 50-60 ℃ in the pre-dispersing process, controlling the rotating speed to be 500 plus materials for 600 turns/min, and then rolling for 3-5 times at 50-60 ℃ to obtain the UV offset printing ink.
By adopting the technical scheme, the preparation method firstly pre-disperses all ingredients in the ink so that all the ingredients can be uniformly dispersed, and then rolls the ink for 30-5 times so that the prepared ink has fine fineness, thereby further increasing the leveling property of the ink and improving the adhesive force and glossiness of the ink.
In summary, the present application has the following beneficial effects:
1. according to the UV offset printing ink, epoxidized soybean oil and ultraviolet curing resin are added, and the high adhesive force, high viscosity and environmental protection characteristics of the epoxidized soybean oil are utilized, so that a certain synergistic effect is generated between the epoxidized soybean oil and the ultraviolet curing resin, and meanwhile, a diluent, a photoinitiator, talcum powder, 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. The soybean oil acrylate is modified by adding the triethylene glycol dimethacrylate, so that the weather resistance, the solvent resistance and the friction resistance of the ink prepared from the soybean oil acrylate can be effectively improved, and the adhesive force and the glossiness of the ink are effectively improved.
3. According to the preparation method, the ingredients in the ink are firstly pre-dispersed, so that 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 fine, the leveling property of the ink is further improved, and the adhesive force and the glossiness of the ink are improved.
Drawings
Fig. 1 is a flow chart of a method provided herein.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples.
The main raw material sources in the application are as follows:
talcum powder is purchased from Shanghai Kangqiong Biotech Limited, and has an average particle size of 3000 mesh.
The magnesium carbonate is light magnesium carbonate, purchased from Jinan Sheng and chemical Co., Ltd, and has an average particle size of 3000 meshes.
Trimethylolpropane triacrylate was purchased from Qingdao Ruimas polymers, Inc. under CAS number 15625-89-5.
The dispersant is luoborun 24000 dispersant.
2-hydroxy-2-methyl-1-phenylacetone is available from Helfu chemical industries, Zhejiang under the reference 1173, CAS number 7473-98-5.
1-Hydroxycyclohexylphenyl methanone was purchased from Helfur chemical trade, Zhejiang, under model 184 and CAS number 947-19-3.
Ethyl 2,4, 6-trimethylbenzoylphenylphosphonate was obtained from seaworthy ltd, texas, under product number: 1065449, CAS number 84434-11-7.
2,4, 6-trimethylbenzoyl-diphenylphosphine oxide was purchased from Jinan Luxin chemical technology Co., Ltd, as photoinitiator TPO, with CAS number of 75980-60-8.
Polyethylene wax is available from Tianjin Hengshengxin international trade company, Inc.
Epoxidized soybean oil was purchased from Shanghai Michelin Biochemical technology Ltd under the product number E808876 and CAS number 8013-07-8.
Acrylic acid was purchased from Shanghai Allantin Biotechnology, Inc. under product number A103526 and CAS number 79-10-7.
Triphenylphosphine was purchased from Beijing coupling technologies, Inc. under CAS number 603-35-0.
P-hydroxyanisole is available from Yonghua chemical Co., Ltd under CAS number 150-76-5.
The polyester acrylate is purchased from Jiangsu Kepo Ruiyang chemical industry Co., Ltd, and the product model is RY 3301.
Specifically, the following are described: the following examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer, and the instruments, materials, reagents and the like used in the following examples, unless otherwise specified, were commercially available.
Preparation of Soybean oil acrylate
Preparation example 1
The preparation method of the soybean oil acrylate comprises the following steps: adding 95 parts of acrylic acid into a four-neck flask provided with a stirrer, a thermometer and a condenser, respectively adding 1 part of catalyst triphenylphosphine and 0.5 part of p-hydroxyphenylmethyl ether, uniformly stirring, heating to 100 ℃, and then dropwise adding epoxidized soybean oil, 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 is finished, then adding 25 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, cooling, adding ethyl acetate to extract an organic layer, using saturated NaHCO to remove unreacted acrylic acid in the organic layer until a water layer is alkaline, washing the organic layer to be neutral by using a saturated NaCl solution, and finally using anhydrous Na2SO4The 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 acrylate comprises the following steps: adding 98 parts of acrylic acid into a four-neck flask provided with a stirrer, a thermometer and a condenser, respectively adding 1.2 parts of catalyst triphenylphosphine and 0.3 part of p-hydroxyphenylmethyl ether, stirring uniformly, heating to 105 ℃, and then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1.2:1, dropwise adding for 1h, reacting at a constant temperature of 105 ℃ for 7h after dropwise adding is finished, then adding 2 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, cooling, adding ethyl acetate to extract an organic layer, using saturated NaHCO to remove unreacted acrylic acid in the organic layer until a water layer is alkaline, washing the organic layer to be neutral by using a saturated NaCl solution, and finally using anhydrous Na2SO4The 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 acrylate comprises the following steps: 100 parts of acrylic acid was taken in a four-necked flask equipped with a stirrer, a thermometer and a condenser, and 1.5 parts of catalyst III was added thereto respectivelyUniformly stirring phenylphosphor and 0.1 part of p-hydroxyphenylmethyl ether serving as a polymerization inhibitor, heating to 110 ℃, then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to acrylic acid is 1.5:1, the dropwise adding time is 1h, reacting at the constant temperature of 110 ℃ for 6h after the dropwise adding is finished, then adding 15 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, cooling, adding ethyl acetate to extract an organic layer, using saturated NaHCO to remove unreacted acrylic acid in the organic layer until a water layer is alkaline, using a saturated NaCl solution to wash the organic layer to be neutral, and finally using anhydrous Na2SO4The organic layer was dried and ethyl acetate was removed by rotary evaporation to give soybean oil acrylate.
Preparation example 4
Preparation 4 differs from preparation 3 in that triethylene glycol dimethacrylate was not added.
Examples
Example 1
The UV offset printing ink with high glossiness comprises the following components in percentage by weight:
10% of epoxidized soybean oil, 30% of ultraviolet 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 Luborun 24000 dispersant.
Wherein the ultraviolet curing resin comprises polyester acrylate and soybean oil acrylate in preparation example 1, and the weight ratio of the polyester acrylate to the soybean oil acrylate is 1: 4; the photoinitiator comprised 2-hydroxy-2-methyl-1-phenyl propanone, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine 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 in proportion, pre-dispersing in a large pre-dispersion tank for 20min, controlling the temperature to be 60 ℃ and the rotating speed to be 600 revolutions per minute in the pre-dispersion process, and then rolling for 3-5 times on an inclined three-roller machine at 50-60 ℃ to reach the standard that the fineness is less than 7.5UM to obtain the UV offset printing ink.
Examples 2 to 7
Examples 2 to 7 each provide a high gloss UV offset ink, differing from example 1 in the component ratios of the constituent UV offset inks, as shown in table 1.
TABLE 1 formulation of UV flexo inks in examples 1-7 (%)
| 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 |
| Talcum 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 |
| Luborun 24000 dispersant | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Examples 8 to 14
Examples 8 to 14 each provide a high gloss UV offset ink, which is different from example 7 in the weight ratio of the polyester acrylate and the 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 7-14
In the table "/" indicates no addition.
Examples 15 to 17
Examples 15-17 each provide a high gloss UV flexographic ink, differing from example 9 in the preparation of the soybean oil acrylate, as shown in table 3.
TABLE 3 preparation of soybean oil acrylates of examples 9, 15-17
| Examples | Soybean oil acrylate |
| 9 | Preparation example 1 |
| 15 | Preparation example 2 |
| 16 | Preparation example 3 |
| 17 | Preparation example 4 |
Examples 18 to 28
Examples 18 to 28 each provide a high gloss UV offset ink, which is different from example 16 in the weight ratio of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide in the photoinitiator, as shown in Table 4.
TABLE 4 formulation of photoinitiators in examples 18-28
In the table "/" indicates no addition.
Comparative example
Comparative example 1
The general type 161 ink is commercially available from Beijing gold Union International supply chain management, Inc.
Comparative example 2
A high gloss UV offset ink, which is different from example 1 in that the UV offset ink contains 30% of epoxidized soybean oil and 10% of UV curable resin.
Comparative example 3
A high gloss UV offset ink, which differs from example 1 in that the UV offset ink contains 2% epoxidized soybean oil and 38% UV curable resin.
Comparative example 4
A high gloss UV offset ink, differing from example 1 in that an equal weight of UV curable resin was used instead of epoxidized soybean oil.
Performance test
Detection method
Ink tack determination: measured by the ink tack test method of GB/T14624.5-1993.
And (3) measuring the fluidity of the ink: the measurement is carried out by a parallel plate viscometer in the GB/T13217.4-2020 ink viscosity test method.
Gloss detection test method:
an experimental machine: IGT
The experimental conditions are as follows: printing pressure: 400N/m
157 g coated paper
The experimental method comprises the following steps: 0.5 g of ink was weighed out on an ink roller, and the ink was sufficiently homogenized for 2 minutes to spread the color.
The gloss measurement was performed with a 60-degree spectrophotometer.
Adhesion detection
According to the GB/T9286-1988 'test for marking the colored paint and varnish paint film', the standard marking method-adhesive tape method is adopted to measure the adhesive force of the ultraviolet curing paint film, and the test result is divided into 6 grades of 0, 1, 2, 3, 4 and 5, the best grade is 0 grade, and the worst grade is 5 grade.
The flexibility was measured by folding the substrate in half, and the presence or absence of cracks was visually observed.
The QB 568-.
Hardness test the hardness of the UV-cured coating was measured using A QHQ-A type portable pencil scratch tester, according to the regulations of GB/T6739-2006 "coating hardness Pencil test method". The ink hardness is classified into soft, 6B, 4B, 3H, 2B, HB, H, 2H, 3H, 4H, 6H and hard.
The results are shown in Table 5.
TABLE 5 results of testing the Properties of UV offset inks in examples 1 to 29 and comparative examples 1 to 4
As can be seen by combining examples 1 to 29 and comparative examples 1 to 4 with table 5, the UV offset ink prepared by the present application significantly improves adhesion and gloss compared to the type 161 ink 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 performance, so that the UV offset printing ink and a base material can be well matched, and the defects of layering and falling are reduced; no crack is produced when the film is folded, and the flexibility is good; the printing ink has the advantages of strong water resistance, ethanol and other organic solvents resistance, and acid and alkali resistance, so that a printed finished product has long storage time, is stable, has beautiful color, is not easy to fade, and has excellent glossiness.
As can be seen from examples 1 to 3 and table 5, the change in the ratio of trimethylolpropane triacrylate, photoinitiator, talc powder and polyethylene wax in the present application can affect the glossiness of the ink, because talc powder has a layered structure, the dispersibility of other components in the ink can be improved, and the glossiness of the ink can be further improved; and 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 further, the wear resistance is improved.
As can be seen by combining examples 4-7 and comparative examples 2-4 with Table 5, 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 curing resin can generate a synergistic effect, and the leveling property of the ultraviolet curing resin is improved under the combined action of the diluent, so that the ultraviolet curing resin and the photoinitiator can fully react and be cured into tough ink with high glossiness. The ink prepared in example 7 had a gloss of 57, an adhesion of 1, and a hardness of 2H.
It can be seen from the combination of examples 7-14 and table 5 that 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 low viscosity and high flexibility. And the polyester acrylic resin and the soybean oil acrylate 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, when the weight ratio of the polyester acrylate to the soybean oil acrylate was 3:4, the ink had a gloss of 59, an adhesion of 1, and a hardness of 2H.
Combining examples 9, 15-17 and table 5, it can be seen that the preparation method of the soybean oil acrylate can affect the adhesion and gloss of the ink, wherein example 17 uses the soybean oil acrylate of preparation 4, and the acrylic resin of preparation 4 does not modify the soybean oil acrylate with triethylene glycol dimethacrylate during the preparation process, and it can be seen that various properties of the prepared ink have different decreases, which shows that the modification of the soybean oil acrylate with triethylene glycol dimethacrylate has important influence on the ink properties. According to the application, the printing ink is modified by adding the triethylene glycol dimethacrylate, the weather resistance, the solvent resistance and the friction resistance of the printing ink prepared by adopting the soybean oil acrylate can be effectively improved, and meanwhile, the adhesive force and the glossiness of the printing ink are effectively improved.
Combining examples 16, 18-28 and table 5, it can be seen that the selection of the components of the photoinitiator and the ratio of the components can affect the adhesion and gloss of the ink, and the photoinitiator can generate more free radicals under the condition of illumination by the synergistic cooperation of 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoyl phenyl phosphonate and 2,4, 6-trimethylbenzoyl diphenyl phosphine oxide, and transfer energy to the ultraviolet curing resin, so that the polyester acrylate and soybean oil acrylate prepolymer and the monomer have chain reaction under the impact of free particles to generate a tough ink film, and simultaneously, the gloss of the cured ink is improved. Among them, in example 22, when the weight ratio of 2-hydroxy-2-methyl-1-phenylpropanone, 1-hydroxycyclohexyl phenyl ketone, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate and 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide was 3.5:3:4:2, the ink gloss reached 63, the adhesion was 0, and the hardness was 4H, which is the most preferable example of the present application.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The UV offset printing ink with high glossiness is characterized by comprising 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.
2. The high gloss UV flexographic ink according to claim 1, characterized in that: 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 flexographic ink according to claim 1, characterized in that: comprises the following components in percentage by weight: 12.7% of epoxidized soybean oil and 28% of ultraviolet curing resin.
4. The high gloss UV flexographic ink according to any of claims 1-3, characterized in that: the ultraviolet curing resin comprises polyester acrylate and soybean oil acrylate.
5. The high gloss UV flexographic ink according to claim 4, characterized in that: the weight ratio of the polyester acrylate to the soybean oil acrylate is 1-3: 4-6.
6. The high gloss UV flexographic ink according to claim 1, characterized in that: the preparation method of the soybean oil acrylate 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 110 ℃ below zero, then dropwise adding epoxidized soybean oil, wherein the weight ratio of the epoxidized soybean oil to the acrylic acid is 1-1.5:1, the dropwise adding time is 1h, reacting at 110 ℃ below zero for 6-8h after the dropwise adding is finished, then adding 2-25 parts of triethylene glycol dimethacrylate, continuously stirring for 5min, stopping heating, and cooling to obtain the soybean oil acrylate.
7. The high gloss UV flexographic ink according to any of claims 1 to 3, characterized in that: the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, 2,4, 6-trimethyl benzoyl phenyl phosphonic acid ethyl ester and 2,4, 6-trimethyl benzoyl diphenyl phosphine oxide in a weight ratio of 3-4:1-3:2-4: 2-3.
8. The high gloss UV flexographic ink according to any of claims 1 to 3, characterized in that: the other auxiliary materials comprise pigments, fillers and dispersants.
9. The high gloss UV flexographic ink according to claim 1, characterized in that: the pigment is carbon black; the filler is magnesium carbonate; the dispersant is Luborun 24000 dispersant.
10. The process for preparing a high gloss UV flexographic ink according to claims 1 to 9, characterized in that it comprises the following steps: weighing 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 according to the proportion, pre-dispersing for 20-30min, controlling the temperature to be 50-60 ℃ in the pre-dispersing process, controlling the rotating speed to be 500 plus materials for 600 turns/min, and then rolling for 3-5 times at 50-60 ℃ to obtain the UV offset printing ink.
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