High adhesion uv ink

Abstract

In view of the technical problems of poor wettability and dispersing performance, poor water resistance and ink flying resistance, and low adhesion of the UV ink produced by the traditional UV ink production process, the present application relates to a high-adhesion UV ink, which comprises the following components in mass fraction: modified photo-curing rosin resin 50-60 parts, polymerization inhibitor 0.1-0.5 parts, photoinitiator 4-8 parts, diluent 10-14 parts, modified wax 1.5-3 parts, filler 2-5 parts, and pigment 12-18 parts. The photoinitiator comprises the following components in mass fraction: 2,4-diethylthioxanthone 15-25 parts, tetraethyl Michler's ketone 50-55 parts, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide 30-35 parts. The above high-adhesion UV ink has a more compact structure and good aging resistance. The ink flying resistance and water resistance are excellent, and the wettability and flowability are good. The adhesion performance is excellent, and the wear resistance and tensile resistance after printing are excellent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-adhesion UV ink, in particular to a high-adhesion UV ink. BACKGROUND

[0002] UV ink, also known as ultraviolet light curing ink, refers to the use of ultraviolet light of different wavelengths and energy to polymerize monomers in ink binder into polymers under ultraviolet irradiation, so as to make the ink film and dry. UV ink also belongs to ink. As ink, they must have bright colors, good printing suitability, suitable curing and drying rate. At the same time, it has good adhesion, and has the characteristics of wear resistance, corrosion resistance, weather resistance, etc. UV ink is a kind of ink without solvent, which has fast drying speed, good gloss, bright color, good water resistance, solvent resistance and wear resistance. UV ink has become a relatively mature ink technology, and its pollutant emission is almost zero. UV ink has the characteristics of selective absorption of UV light. The drying is affected by the total energy of the UV light source and the energy distribution of different wavelengths. Under the irradiation of UV light, the UV ink photopolymerization initiator absorbs photons of a certain wavelength, excites to the excited state, and forms free radicals or ions. Then through intermolecular energy transfer, the polymerized prepolymer and the light-sensitive monomer and polymer become excited state, and the charge transfer complex is generated. These complex particles continuously crosslink and polymerize to form a film.

[0003] However, the UV ink produced by the traditional UV ink production process, for example, the UV ink in the technical solution disclosed in the patent with the application number CN201811064733.6 and the invention name of a preparation method of UV ink, has poor wettability and dispersion performance, poor water resistance and anti-flying ink ability, and low adhesion. SUMMARY

[0004] Therefore, it is necessary to provide a high-adhesion UV ink production process in view of the technical problems of poor wettability and dispersion performance, poor water resistance and anti-flying ink ability, and low adhesion of the UV ink produced by the traditional UV ink production process.

[0005] A high-adhesion UV ink, which comprises the following components in mass parts: modified light-cured rosin resin 50-60 parts, polymerization inhibitor 0.1-0.5 parts, photoinitiator 4-8 parts, diluent 10-14 parts, modified wax 1.5-3 parts, filler 2-5 parts, and pigment 12-18 parts.

[0006] In one embodiment, the modified wax is zirconium modified PE wax.

[0007] In one embodiment, the pigment is one of benzidine yellow, magenta, phthalocyanine blue, and carbon black.

[0008] In one embodiment, the high-adhesion UV ink further comprises a dispersant in an amount of 0.01 to 2 parts.

[0009] In one embodiment, the dispersant is a fatty acid-modified high-molecular polymer.

[0010] In one embodiment, the polymerization inhibitor is N-nitrosohydroxylamine aluminum salt.

[0011] In one embodiment, the photoinitiator comprises the following components in the following amounts: 2,4-diethylthioxanthone 15 to 25 parts, tetraethyl Michler's ketone 50 to 55 parts, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide 30 to 35 parts.

[0012] In one embodiment, the diluent comprises the following components in the following amounts: trimethylolpropane triacrylate 35 to 40 parts, propoxylated glyceryl triacrylate 35 to 40 parts, and pentaerythritol hexaacrylate 20 to 30 parts.

[0013] In one embodiment, the filler is an inorganic filler.

[0014] In one embodiment, the inorganic filler is nano calcium carbonate.

[0015] The high-adhesion UV ink described above has a more compact structure, good aging resistance, excellent anti-flying ink and water resistance, good wettability and flowability, excellent adhesion, and excellent wear resistance and tensile resistance after printing. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A flowchart of a production process of the modified photo-curable rosin resin in one embodiment;

[0017] Figure 2 A schematic diagram of the chemical modification process of the modified photo-curable rosin resin in one embodiment. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0019] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0020] The present application provides a high-adhesion UV ink, which comprises the following components by mass: modified photo-curable rosin resin 50-60 parts, polymerization inhibitor 0.1-0.5 parts, photoinitiator 4-8 parts, diluent 10-14 parts, modified wax 1.5-3 parts, filler 2-5 parts, pigment 12-18 parts. Further, the high-adhesion UV ink comprises the following components by mass: modified photo-curable rosin resin 54-60 parts, polymerization inhibitor 0.2-0.4 parts, photoinitiator 5-7 parts, diluent 11-13 parts, modified wax 2-2.5 parts, filler 3-4 parts, pigment 13-17 parts. Specifically, the high-adhesion UV ink comprises the following components by mass: modified photo-curable rosin resin 60 parts, polymerization inhibitor 0.3 parts, photoinitiator 6 parts, diluent 12 parts, modified wax 2.5 parts, filler 3.5 parts, pigment 15.7 parts. In the present embodiment, the pigment is one of benzidine yellow, magenta, phthalocyanine blue, and carbon black. In one embodiment, the filler is an inorganic filler. Further, in the present embodiment, the inorganic filler is nano calcium carbonate.

[0021] The high-adhesion UV ink described above has a more compact structure and good aging resistance. It has excellent anti-flying ink and water resistance, good wettability and flowability. It has excellent adhesion, and excellent wear resistance and tensile resistance after printing.

[0022] In order to further improve the lubricity of the high-adhesion UV ink, in one embodiment, the modified wax is zirconium-modified PE wax. The zirconium-modified PE wax can improve the internal and external lubricity of the ink, and will not affect the adhesion of the high-adhesion UV ink.

[0023] In order to improve the mixing uniformity of the components in the high-adhesion UV ink, in one embodiment, the high-adhesion UV ink further comprises a dispersant 0.01-2 parts. Further, in the present embodiment, the dispersant is a fatty acid-modified high molecular polymer. The fatty acid-modified high molecular polymer can increase the mixing uniformity of the components in the high-adhesion UV ink, thereby increasing the stability of the high-adhesion UV ink.

[0024] In order to slow down the polymerization of the components in the high-adhesion UV ink, in one embodiment, the polymerization inhibitor is N-nitrosoanisidine aluminum salt. The N-nitrosoanisidine aluminum salt can slow down the polymerization of the components in the high-adhesion UV ink, thereby ensuring the working stability of the high-adhesion UV ink and avoiding curing before irradiation of UV light.

[0025] In order to improve the curing efficiency of the high-adhesion UV ink after receiving UV light, in one embodiment, the photoinitiator comprises the following components by mass fraction: 2,4-diethylthioxanthone 15-25 parts, tetraethyl Michler's ketone 50-55 parts, and 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide 30-35 parts. The photoinitiator composed of the above components can make the high-adhesion UV ink quickly cure after receiving UV light, thereby improving the curing stability of the high-adhesion UV ink.

[0026] In order to adjust the concentration and viscosity of the high-adhesion UV ink, in one embodiment, the diluent comprises the following components by mass fraction: trimethylolpropane triacrylate 35-40 parts, propoxylated glyceryl triacrylate 35-40 parts, and pentaerythritol hexaacrylate 20-30 parts. The diluent composed of the above components can adjust the concentration and viscosity of the high-adhesion UV ink without affecting the curing performance.

[0027] The present application also provides a preparation process of the high-adhesion UV ink:

[0028] First step: place 50-60 parts by mass of modified photo-cured rosin resin, 0.1-0.5 parts by mass of polymerization inhibitor, 10-14 parts by mass of polymerization inhibitor, 1.5-3 parts by mass of modified wax, 2-5 parts by mass of nano calcium carbonate, 12-18 parts by mass of pigment, and 0.01-2 parts by mass of dispersant into a reaction kettle and mix and stir uniformly, at a stirring rate of 800 r / min and for 5-10 minutes, to obtain a UV ink.

[0029] Second step: heat the UV ink to 70-80°C and keep the temperature for 20-40 minutes. Specifically, heat to 75°C and keep the temperature for 30 minutes. Then grind the heated UV ink.

[0030] Third step: grind the heated UV ink in a three-roll mill so that the fineness of the UV ink is less than 8 microns, to obtain a high-adhesion UV ink.

[0031] Please refer to Figure 1 and Figure 2 , the present application provides a production process of modified photo-cured rosin resin, which comprises the following steps:

[0032] Step 101: rosin melting step: rosin with a mass fraction of 130 to 160 parts is heated to melt the rosin.

[0033] Specifically, rosin with a mass fraction of 130 to 160 parts is added to a four-necked flask and heated to melt the rosin. In this embodiment, the heating temperature is 220 to 240 degrees Celsius.

[0034] Step 102: first modification step: 30 to 40 parts of acrylic acid is added to the rosin in a molten state with a mass fraction of 130 to 160 parts, mixed and stirred uniformly, heated under a protective gas to obtain an acrylic acid modified rosin.

[0035] The protective gas is nitrogen.

[0036] Specifically, 30 to 40 parts of acrylic acid is added to the rosin in a molten state with a mass fraction of 130 to 160 parts, mixed and stirred uniformly, heated under nitrogen protection to obtain an acrylic acid modified rosin. In this embodiment, the heating temperature is 220 to 240 degrees Celsius, and the reaction time is 3 to 4 hours.

[0037] Step 103: second modification step: 160 to 200 parts of acrylic acid modified rosin, 400 to 450 parts of ethylene glycol diglycidyl ether, and 1.6 to 2 parts of a catalyst are mixed and stirred uniformly, heated under a protective gas to obtain a second modified rosin.

[0038] The protective gas is nitrogen. In this embodiment, the catalyst is one or more of triphenylphosphine, sodium ethoxide, and triethylamine.

[0039] Specifically, 160 to 200 parts of acrylic acid modified rosin, 400 to 450 parts of ethylene glycol diglycidyl ether, and 1.6 to 2 parts of a catalyst are mixed and stirred uniformly in a four-necked flask under nitrogen protection to obtain a second modified rosin. In this embodiment, the heating temperature is 120 to 140 degrees Celsius, and the reaction time is 1 to 2 hours. Until the acid value of the second modified rosin is less than 12 mgKOH / g.

[0040] Step 104: third modification step: 560 to 660 parts of second modified rosin, 450 to 500 parts of long-chain alkyl isocyanate, and 1.6 to 2 parts of a catalyst are mixed and stirred uniformly, heated under a protective gas to obtain a third modified rosin.

[0041] The protective gas is nitrogen. In the embodiment, the catalyst is one or more of triphenyl phosphine, sodium ethoxide and triethylamine. The long-chain alkyl isocyanate is one or more of dodecyl isocyanate, hexadecyl isocyanate and octadecyl isocyanate.

[0042] Specifically, 560-660 parts by mass of the secondary modified rosin, 450-500 parts by mass of the long-chain alkyl isocyanate, 1.6-2 parts by mass of the catalyst are mixed and stirred uniformly in a four-necked flask, and heated to react under nitrogen protection to obtain the tertiary modified rosin. In the embodiment, the heating temperature is 120-140 degrees Celsius, and the reaction time is 1-2 hours.

[0043] Step 105: Fourth modification step: 1010-1170 parts by mass of the tertiary modified rosin, 140-160 parts by mass of ethoxylated trimethylolpropane triacrylate, 0.3-0.5 parts by mass of hydroquinone, and 3-5 parts by mass of ethyl acetate are mixed and stirred uniformly, and heated to react under protective gas to obtain the modified photocuring rosin resin.

[0044] The protective gas is nitrogen.

[0045] Specifically, 1010-1170 parts by mass of the secondary modified rosin, 140-160 parts by mass of ethoxylated trimethylolpropane triacrylate, 0.3-0.5 parts by mass of hydroquinone, and 3-5 parts by mass of ethyl acetate are mixed and stirred uniformly in a four-necked flask, and heated to react under nitrogen protection to obtain the modified photocuring rosin resin. In the embodiment, the heating temperature is 80-100 degrees Celsius, and the reaction time is 1-2 hours.

[0046] The application also provides a modified photocuring rosin resin produced by the production process of the modified photocuring rosin resin in any of the above embodiments. The modified photocuring rosin resin provided by the application is tested and compared, and the results are as follows:

[0047] Specific experimental data:

[0048]

[0049] Note: All the above resins are photocuring resins

[0050] The grade is 1-5, and 5 is the best.

[0051] The production process of the modified photocuring rosin resin is simple, easy to operate, and each step is careful and meticulous. The modified photocuring rosin resin obtained by the production process has a glycidyl ester structure with an epoxy group, so that the wettability of the modified photocuring rosin resin is improved. The long-chain isocyanate group is introduced, which reduces the polarity of the modified photocuring rosin resin, controls the surface tension of the modified photocuring rosin resin, improves the adhesion of the modified photocuring rosin resin to the substrate, and at the same time improves the molecular weight of the modified photocuring rosin resin, so that the structure of the modified photocuring rosin resin is more compact, the anti-flying ink ability and the water resistance of the modified photocuring rosin resin applied in the high-adhesion UV ink are improved, and the adhesion performance of the high-adhesion UV ink is improved.

[0052] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present disclosure.

[0053] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A high-adhesion UV ink, characterized in that, The product comprises the following components in parts by weight: 50 to 60 parts of modified photocurable rosin resin, 0.1 to 0.5 parts of polymerization inhibitor, 4 to 8 parts of photoinitiator, 10 to 14 parts of diluent, 1.5 to 3 parts of modified wax, 2 to 5 parts of filler, and 12 to 18 parts of pigment. The high-adhesion UV ink also includes 0.01 to 2 parts of a dispersant, wherein the dispersant is a fatty acid-modified polymer; The photoinitiator comprises the following components in parts by weight: 15 to 25 parts of 2,4-diethylthioanthraquinone, 50 to 55 parts of tetraethylmielone, and 30 to 35 parts of 2,4,6-trimethylformyl-diphenylphosphine oxide. The modified photocurable rosin resin is prepared by a modified photocurable rosin resin production process, which includes the following steps: rosin melting step: heating 130 to 160 parts by weight of rosin to melt the rosin; First modification step: Add 30 to 40 parts by weight of acrylic acid to 130 to 160 parts by weight of molten rosin, mix and stir evenly, and heat and react under a protective gas to obtain acrylic acid modified rosin. Second modification step: 160 to 200 parts by weight of acrylic acid-modified rosin, 400 to 450 parts by weight of ethylene glycol diglycidyl ether, and 1.6 to 2 parts by weight of catalyst are mixed and stirred evenly, and heated under a protective gas to obtain secondary modified rosin. The third modification step: 560 to 660 parts by weight of the second-modified rosin, 450 to 500 parts by weight of the long-chain alkyl isocyanate, and 1.6 to 2 parts by weight of the catalyst are mixed and stirred evenly, and heated under a protective gas to obtain the third-modified rosin. Fourth modification step: 1010 to 1170 parts by weight of tertiary modified rosin, 140 to 160 parts by weight of trimethylolpropane triacrylate, 0.3 to 0.5 parts by weight of hydroquinone, and 3 to 5 parts by weight of ethyl acetate are mixed and stirred evenly, and heated under a protective gas to obtain modified light-cured rosin resin.

2. The high-adhesion UV ink according to claim 1, characterized in that, The modified wax is a zirconium-modified PE wax.

3. The high-adhesion UV ink according to claim 1, characterized in that, The pigment is one of benzidine yellow, magenta, phthalocyanine blue, and carbon black.

4. The high-adhesion UV ink according to claim 1, characterized in that, The polymerization inhibitor is N-nitrosophenylhydroxylamine aluminum salt.

5. The high-adhesion UV ink according to claim 1, characterized in that, The diluent comprises the following components in parts by weight: 35 to 40 parts of trimethylolpropane triacrylate, 35 to 40 parts of propoxyglycerol triacrylate, and 20 to 30 parts of pentaerythritol hexaacrylate.

6. The high-adhesion UV ink according to claim 1, characterized in that, The packing material is an inorganic packing material.

7. The high-adhesion UV ink according to claim 6, characterized in that, The inorganic filler is nano-calcium carbonate.

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