Water-based pigment ink-jet ink containing isotridecanol polyoxyethylene ether as well as preparation method and application of water-based pigment ink-jet ink

Abstract

According to the water-based pigment ink-jet ink containing the isotridecanol polyoxyethylene ether and the preparation method and application of the water-based pigment ink-jet ink containing the isotridecanol polyoxyethylene ether, the isotridecanol polyoxyethylene ether is added, and the proportion of all the raw materials in the water-based pigment ink-jet ink is limited; products printed by the water-based pigment ink-jet ink have good color density after being finished, and in addition, the water-based pigment ink-jet ink has excellent printing continuity, excellent installation performance and cleaning performance during printing and also has good suspension standby performance, so that the water-based pigment ink-jet ink containing isotridecanol polyoxyethylene ether provided by the invention has the advantages that the water-based pigment ink-jet ink is high in color density and good in water-based pigment ink-jet effect; the color density of a printed product can be improved, and the ink has excellent installation performance, cleaning performance, printing continuity and suspension standby performance.

Description

Technical Field

[0001] This invention relates to the field of water-based inkjet inks, specifically to a water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether, its preparation method, and its application. Background Technology

[0002] With the continuous development of inkjet printing technology, water-based pigment inkjet inks have been widely used in the digital printing field due to their environmental protection and safety advantages. Water-based pigment inkjet inks are mainly composed of pigments, dispersants, solvents, surfactants, humectants, polyurethane resins, and other components. The ink is precisely sprayed onto the printing medium through the inkjet printhead to form the desired image or text.

[0003] Currently, common water-based pigment inkjet inks on the market typically contain 5-15 parts pigment, 1-3 parts dispersant, water-based organic solvent, and pure water. To improve ink stability and printing quality, auxiliary ingredients such as defoamers and pH adjusters are also added. Some ink formulations also include water-based polymer dispersions (1-30 wt%) and film-forming aids (0.1-5 wt%) to improve ink storage stability and print quality.

[0004] With advancements in printing technology, several improved water-based pigment ink formulations have been developed. For example, CN116200074A discloses a water-based pigment inkjet ink comprising 35%-50% water-based pigment dispersion, 10%-30% solvent, 0.5%-5% surfactant, and 1%-5% moisturizing agent. This ink exhibits excellent printing smoothness on EPSON printhead models. Further research indicates that adding trimethylolpropane (1%-10%) and structured acrylic copolymers containing pigment-affinity groups (1%-10%) can improve the ink's compatibility and adhesion to specific materials.

[0005] To address the adhesion problem on non-absorbent printing substrates, CN116463008B discloses an aqueous inkjet ink comprising a polyurethane binder with a low acid value, a low acid value dispersant, and a polyvalent calcium salt fixative. This ink exhibits good adhesion and abrasion resistance on non-absorbent surfaces.

[0006] However, existing water-based pigment inkjet inks still face several technical challenges: First, their printing color density is generally low, making it difficult to meet the demands of high-quality printing. Second, pigment particles are prone to sedimentation in the ink, affecting its stability and lifespan, and may clog printheads when installed in printer ink tanks. Furthermore, excessively increasing the pigment ratio to improve color density leads to increased ink viscosity, affecting the continuity and stability of inkjet printing. These problems severely restrict the application and development of water-based pigment inkjet inks in the field of high-quality printing. Summary of the Invention

[0007] To overcome the shortcomings of existing pigment inks, such as generally low color density and poor printing continuity, this invention provides an aqueous pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether, its preparation method, and its application. The aqueous pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether provided by this invention can improve the color density of printed products, and also has excellent printing continuity, excellent installation performance and cleaning performance, as well as good standby performance.

[0008] The object of this invention is achieved in the following manner: A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether comprises the following components by weight percentage: 40-50% water-based pigment, 10-30% viscosity modifier, 0.1-5% substrate wetting agent, 3-7% isotretinoin polyoxyethylene ether, 0.1-3% pH adjuster, 3-8% polyurethane resin, 0.1-3% bactericide, 0.1-3% defoamer, and 7.2-20% deionized water; the pigment weight percentage in the water-based pigment is 10%-20%.

[0009] The molecular formula of isotridecyl alcohol polyoxyethylene ether is C13H27O(CH2CH2O)nH, where n ranges from 6 to 10.

[0010] Water-based color pastes include any one of the following: Shanghai Wangchong Water-based Color Paste, Zhejiang Nami Water-based Color Paste, Beijing Engis Water-based Color Paste, D.E.S. Water-based Color Paste, Flint Water-based Color Paste, Sakata Water-based Color Paste, and Sanyo Water-based Color Paste. Viscosity modifiers include at least one of glycerin, triethylene glycol, diethylene glycol, ethylene glycol, 1,2-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, tripropylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol ethyl ether, dipropylene glycol ethyl ether, caprolactam, polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, polypropylene glycol 200, polypropylene glycol 400, polypropylene glycol 600, polypropylene glycol 800, and polypropylene glycol 1000; The substrate wetting agent includes at least one of BYK302, BYK-DYNWET 810, DISPERBYK-190, DISPERBYK-2015, Surfynol 465, Surfynol 604, DYNOL 960, TEGO Airex 920, Surfynol 485, Surfynol 104, Dynol 607, Dygo 510, TEGO WET 260, TEGO WET 270, and TEGO WET 280; pH adjusters include at least one of ethanolamine, diethanolamine, triethanolamine, urea, ammonia, ammonium carbonate, ammonium bicarbonate, sodium hydroxide, and potassium hydroxide. The defoamers include BYK-024, BYK-018, BYK-019, BYK-021, BYK-022, BYK-023, BYK-024, BYK-057, Surfynol DF-110D, Surfynol DF-104E, and Surfynol DF-420 from Gas Chemical Company, and Tego Foamex 842 from Tigo Corporation. The bactericide is a benzisothiazolinone bactericide.

[0011] The ink has a pH value of 8.00-9.00, a viscosity of 3.0-4.5 mPa·s, and a surface tension of 21-31 mN / m.

[0012] ink particle size D 50 ≤140nm, D 95 ≤240nm.

[0013] The viscosity modifiers are glycerin, diethylene glycol, and ethylene glycol; the substrate wetting agents are BYK302 and TEGO WET 260; the water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether comprises the following components by weight percentage: 50% water-based pigment, 12.5% ​​glycerin, 5% diethylene glycol, 8% ethylene glycol, 1% BYK302, 0.5% TEGO WET 260, 5% isotretinoin polyoxyethylene ether TO8, 0.2% Kathon, 0.3% triethanolamine, 8% polyurethane resin, 0.3 parts % Tego foamex 842, and 9.2% deionized water; the pigment weight percentage in the water-based pigment is 10%-20%.

[0014] The method for preparing the water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether involves measuring each component raw material separately, mixing the raw materials evenly, then performing a first-stage 1.2μm filter treatment, a second-stage 0.45μm filter treatment, and a third-stage 0.22μm filter treatment to obtain the water-based pigment inkjet ink.

[0015] The method for preparing the aqueous pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether includes the following steps: Measure out each component of the raw material separately; Add a viscosity modifier to the deionized water to ensure that all components are thoroughly mixed. Then add the substrate wetting agent and isotretinoin polyoxyethylene ether to ensure that all components are thoroughly mixed. Then add pH adjuster and bactericide to ensure that all components are thoroughly mixed. Then continue adding polyurethane resin to ensure that all components are thoroughly mixed. Then continue adding water-based colorant to ensure that all components are thoroughly mixed. Then, defoamer is added to ensure that all components are fully mixed. The mixture is then filtered through a 1.2μm filter, followed by a 0.45μm filter and a 0.22μm filter to obtain water-based pigment inkjet ink.

[0016] Application of the water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether.

[0017] The aforementioned water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether is used in the field of corrugated paper inkjet printing.

[0018] Compared with the prior art, the present invention provides an aqueous pigment inkjet ink containing isotretinoin polyoxyethylene ether, its preparation method and application. By adding isotretinoin polyoxyethylene ether and limiting the proportion of each raw material in the aqueous pigment inkjet ink, the printed products of the present invention have good color density. In addition, the ink has excellent printing continuity, excellent machine installation performance and cleaning performance, and good standby performance. Therefore, the aqueous pigment inkjet ink containing isotretinoin polyoxyethylene ether provided by the present invention can improve the color density of printed products, and has excellent machine installation performance, cleaning performance and excellent printing continuity, as well as good standby performance. Attached Figure Description

[0019] Figure 1 This is a graph showing the test results of the installed performance of Embodiment 1 of this application.

[0020] Figure 2 This is a test result diagram of the installed performance of Comparative Example 1 of this application. Detailed Implementation

[0021] A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether comprises the following components by weight percentage: 40-50% water-based pigment, 10-30% viscosity modifier, 0.1-5% substrate wetting agent, 3-7% isotretinoin polyoxyethylene ether, 0.1-3% pH adjuster, 3-8% polyurethane resin, 0.1-3% bactericide, 0.1-3% defoamer, and 7.2-20% deionized water; the pigment weight percentage in the water-based pigment is 10%-20%.

[0022] The molecular formula of isotridecyl alcohol polyoxyethylene ether is C13H27O(CH2CH2O)nH, where n ranges from 6 to 10.

[0023] Water-based color pastes include any one of the following: Shanghai Wangchong Water-based Color Paste, Zhejiang Nami Water-based Color Paste, Beijing Engis Water-based Color Paste, D.E.S. Water-based Color Paste, Flint Water-based Color Paste, Sakata Water-based Color Paste, and Sanyo Water-based Color Paste. Viscosity modifiers include at least one of glycerin, triethylene glycol, diethylene glycol, ethylene glycol, 1,2-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, tripropylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol ethyl ether, dipropylene glycol ethyl ether, caprolactam, polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, polypropylene glycol 200, polypropylene glycol 400, polypropylene glycol 600, polypropylene glycol 800, and polypropylene glycol 1000; The substrate wetting agent includes at least one of BYK302, BYK-DYNWET 810, DISPERBYK-190, DISPERBYK-2015, Surfynol 465, Surfynol 604, DYNOL 960, TEGO Airex 920, Surfynol 485, Surfynol 104, Dynol 607, Dygo 510, TEGO WET 260, TEGO WET 270, and TEGO WET 280; pH adjusters include at least one of ethanolamine, diethanolamine, triethanolamine, urea, ammonia, ammonium carbonate, ammonium bicarbonate, sodium hydroxide, and potassium hydroxide. The defoamers include BYK-024, BYK-018, BYK-019, BYK-021, BYK-022, BYK-023, BYK-024, BYK-057, Surfynol DF-110D, Surfynol DF-104E, and Surfynol DF-420 from Gas Chemical Company, and Tego Foamex 842 from Tigo Corporation. The bactericide is a benzisothiazolinone bactericide.

[0024] The ink has a pH value of 8.00-9.00, a viscosity of 3.0-4.5 mPa·s, and a surface tension of 21-31 mN / m.

[0025] ink particle size D 50 ≤140nm, D 95 ≤240nm.

[0026] The viscosity modifiers are glycerin, diethylene glycol, and ethylene glycol; the substrate wetting agents are BYK302 and TEGO WET 260; the water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether comprises the following components by weight percentage: 50% water-based pigment, 12.5% ​​glycerin, 5% diethylene glycol, 8% ethylene glycol, 1% BYK302, 0.5% TEGO WET 260, 5% isotretinoin polyoxyethylene ether TO8, 0.2% Kathon, 0.3% triethanolamine, 8% polyurethane resin, 0.3 parts % Tego foamex 842, and 9.2% deionized water; the pigment weight percentage in the water-based pigment is 10%-20%.

[0027] The method for preparing the water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether involves measuring each component raw material separately, mixing the raw materials evenly, then performing a first-stage 1.2μm filter treatment, a second-stage 0.45μm filter treatment, and a third-stage 0.22μm filter treatment to obtain the water-based pigment inkjet ink.

[0028] The method for preparing the aqueous pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether includes the following steps: Measure out each component of the raw material separately; Add a viscosity modifier to the deionized water to ensure that all components are thoroughly mixed. Then add the substrate wetting agent and isotretinoin polyoxyethylene ether to ensure that all components are thoroughly mixed. Then add pH adjuster and bactericide to ensure that all components are thoroughly mixed. Then continue adding polyurethane resin to ensure that all components are thoroughly mixed. Then continue adding water-based colorant to ensure that all components are thoroughly mixed. Then, defoamer is added to ensure that all components are fully mixed. The mixture is then filtered through a 1.2μm filter, followed by a 0.45μm filter and a 0.22μm filter to obtain water-based pigment inkjet ink.

[0029] Application of the water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether.

[0030] The aforementioned water-based pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether is used in the field of corrugated paper inkjet printing.

[0031] The present invention will now be described in detail with reference to specific embodiments. It should be noted that these embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments based on the above description of the present invention.

[0032] Example 1 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemical GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 3 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 11.2 parts of deionized water.

[0033] The method for preparing the aqueous pigment inkjet ink containing isotridecyl alcohol polyoxyethylene ether includes the following steps: (1) Measure the raw materials of each component separately; (2) Add glycerol, diethylene glycol, ethylene glycol and deionized water to a container and mix for 1 hour with stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (3) Then, while stirring at 500 rpm, add substrate wetting agent BYK302, TEGO WET 260 and isothietrol polyoxyethylene ether TO8, and mix for 1 hour while stirring at 500 rpm to fully dissolve and mix the components. (4) Then, while stirring at 500 rpm, add the pH adjuster triethanolamine and the bactericide Kathon, and mix for 1 hour while stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (5) Then, continue to add polyurethane resin Joncryl 7236 while stirring at 500 rpm, and mix for 1 hour while stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (6) Then add water-based black pigment MJ-BK and mix for 1 hour with stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (7) Finally, add the defoamer Tego foamex 842 and mix for 1 hour with stirring at 500 rpm to fully dissolve and mix the components to obtain the original ink; (8) Let the raw ink stand for 1 hour. Then filter it through three stages using 1.2μm, 0.45μm and 0.22μm filter cartridges to obtain the finished black ink.

[0034] Example 2 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 4 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 10.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0035] Example 3 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0036] Example 4 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 6 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 8.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0037] Example 5 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 7 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 7.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0038] Example 6 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based yellow pigment MJ-GR from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished yellow ink was obtained according to the preparation steps of Example 1.

[0039] Example 7 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based cyan pigment MJ-BU from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished cyan ink is obtained according to the preparation steps of Example 1.

[0040] Example 8 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based pigment paste MJ-PE from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished pigment ink is obtained according to the preparation steps of Example 1.

[0041] Comparative Example 1 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemical GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 3 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 11.2 parts of deionized water.

[0042] The method for preparing the water-based pigment inkjet ink includes the following steps: (1) Measure the raw materials of each component separately; (2) Add glycerol, diethylene glycol, ethylene glycol and deionized water to a container and mix for 1 hour with stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (3) Then, while stirring at 500 rpm, add substrate wetting agent BYK302, TEGO WET 260 and tripropylene glycol butyl ether, and mix for 1 hour while stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (4) Then, while stirring at 500 rpm, add the pH adjuster triethanolamine and the bactericide Kathon, and mix for 1 hour while stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (5) Then, continue to add polyurethane resin Joncryl 7236 while stirring at 500 rpm, and mix for 1 hour while stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (6) Then add water-based black pigment MJ-BK and mix for 1 hour with stirring at 500 rpm to ensure that all components are fully dissolved and mixed. (7) Finally, add the defoamer Tego foamex 842 and mix for 1 hour with stirring at 500 rpm to fully dissolve and mix the components to obtain the original ink; (8) Let the raw ink stand for 1 hour. Then filter it through three stages using 1.2μm, 0.45μm and 0.22μm filter cartridges to obtain the finished black ink.

[0043] Comparative Example 2 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 4 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 10.2 parts of deionized water. The finished black ink is obtained following the preparation steps of Comparative Example 1.

[0044] Comparative Example 3 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished black ink is obtained following the preparation steps of Comparative Example 1.

[0045] Comparative Example 4 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 6 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 8.2 parts of deionized water. The finished black ink is obtained following the preparation steps of Comparative Example 1.

[0046] Comparative Example 5 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 7 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 7.2 parts of deionized water. The finished black ink is obtained by following the preparation steps of Comparative Example 1.

[0047] Comparative Example 6 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based yellow pigment MJ-GR from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished yellow ink was obtained according to the preparation steps of Example 1.

[0048] Comparative Example 7 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based cyan pigment MJ-BU from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished cyan ink is obtained according to the preparation steps of Example 1.

[0049] Comparative Example 8 A water-based pigment inkjet ink containing isotretinoin polyoxyethylene ether, comprising, by weight 100 parts, 50 parts of water-based pigment paste MJ-PE from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of tripropylene glycol butyl ether, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 9.2 parts of deionized water. The finished pigment ink is obtained according to the preparation steps of Example 1.

[0050] Example 9 A water-based pigment inkjet ink, by weight, comprises 40 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 19.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0051] Example 10 A water-based pigment inkjet ink, by weight, comprises 43 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 16.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0052] Example 11 A water-based pigment inkjet ink, by weight, comprises 47 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 8 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 12.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0053] Example 12 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Kelton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 3 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 14.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0054] Example 13 A water-based pigment inkjet ink, by weight, comprises 50 parts of water-based black pigment MJ-BK from Zhejiang Nami New Materials Co., Ltd., 12.5 parts of glycerin, 5 parts of diethylene glycol, 8 parts of ethylene glycol, 1 part of BYK302 from BYK Chemicals GmbH (Germany), 0.5 parts of TEGO WET 260 from Tego GmbH (Germany), 5 parts of isotretinoin polyoxyethylene ether TO8 from Krohton reagent, 0.2 parts of bactericide Kathon, 0.3 parts of pH adjuster triethanolamine, 5 parts of polyurethane resin Joncryl 7236 from BASF (Germany), 0.3 parts of defoamer Tego foamex 842 from Tego GmbH (Germany), and 12.2 parts of deionized water. The finished black ink is obtained according to the preparation steps of Example 1.

[0055] Performance testing methods The inks prepared in the examples and comparative examples were subjected to performance tests, and the test data are listed in Tables 1 and 2.

[0056] Ink physicochemical parameters: 1. Particle size: Particle size analyzer, Brookhaven 90PLUS laser particle size analyzer (USA).

[0057] 2. Viscosity: Viscometer, Shanghai Pingxuan Scientific Instruments Co., Ltd. NDJ-5S, test temperature 25℃.

[0058] 3. Surface tension: Surface tension meter, Hebei Chengde Precision Testing Machine Co., Ltd. Automatic Interface Tensiometer JZ-200A.

[0059] Ink performance parameters on digital printers: 1. Print continuity test: Print settings: Feather off. Number of passes: Set to 4 passes. Print direction: Bidirectional printing. Continuous printing for 5m. 2 10m 2 20m 2 Single-color block. Immediately after printing, perform a printhead test. 0-2 broken lines in the test are acceptable, while 3-6 or more broken lines are unacceptable. The larger the single-color block, the better the effect.

[0060] 2. Print color density test: Monochrome block. Print settings: Fine feathering. Number of passes: Set to 1 pass. Print orientation: Unidirectional printing. Printing media: A4 office paper. Then measure the color density.

[0061] 3. Installation Performance Test: The printhead is an EPSON I3200A1. The prepared ink is filled into a compatible ink cartridge, and after three automatic ink filling and cleaning cycles, the printhead is directly tested to check for broken lines. During the test, 0-2 broken lines per color channel is considered acceptable, while 3-6 or more broken lines are considered unacceptable. Each example and comparative example undergoes 3-4 performance tests. The test results for black ink in Example 1 are as follows... Figure 1 The test was passed. The test result for the black ink in Comparative Example 1 is as follows: Figure 2 There were too many broken wires, and the test failed.

[0062] 4. Cleaning Performance Test: During printing, the ink supply path is manually cut off, causing large-area line breaks in the print. Printing is stopped, and printhead cleaning is initiated. The printhead is then tested to check if the line breaks are restored after cleaning. Judgment: A good result is achieved if the printhead recovers after 1-2 cleaning cycles out of 4 tests; a poor result is achieved if it recovers after 3-6 cleaning cycles or fails to recover.

[0063] 5. Standby performance test: Test temperature 23-27℃, humidity 40-60%, turn off flash spray, remove the nozzle from the humidification box and stand by for 10min, 15min, 20min and 30min respectively. Check the nozzle for broken wires. 0-2 broken wires are acceptable, 3-6 broken wires or more are unacceptable. The longer the standby time, the better the effect.

[0064] Table 1 Physicochemical Parameter Tests Table 2 Printing performance test parameters As shown in Tables 1-2, the inkjet inks prepared in Comparative Examples 1-8 exhibit poor installation and cleaning performance, while the inkjet inks prepared in Examples 1-13 demonstrate superior installation and cleaning performance compared to the comparative examples. The inkjet inks prepared in Comparative Examples 1-8 also exhibit poor printing color density, or both poor printing continuity and color density. In contrast, the inkjet inks prepared in Examples 1-13 of this application demonstrate excellent printing continuity and high printing color density. The printing continuity of the inkjet inks prepared in Examples 1-13 of this application is at least 4 passes per 15 minutes. 2 Qualified. The printing color density of Example 1 of this application is 15.0% higher than that of Comparative Example 1, 16.3% higher than that of Comparative Example 2, and 14.9% higher than that of Comparative Example 3, making it the optimal solution in terms of overall performance. The printing color density of Example 4 of this application is 12.6% higher than that of Comparative Example 4, and 13.2% higher than that of Comparative Example 5. For yellow ink, the printing color density of Example 6 is 20.0% higher than that of Comparative Example 6. For magenta ink, the printing color density of Example 7 is 21.3% higher than that of Comparative Example 7, and for cyan ink, the printing color density of Example 8 is 18.7% higher than that of Comparative Example 8. In Examples 9-11, adjusting the pigment addition ratio changes the color density and standby time, resulting in lower overall performance compared to Example 3. In Examples 12-13, adjusting the polyurethane resin addition ratio changes the color density, resulting in lower overall performance compared to Example 3.

[0065] In summary, this invention provides an aqueous pigment inkjet ink containing isotretinoin polyoxyethylene ether, its preparation method, and its application. By adding isotretinoin polyoxyethylene ether and limiting the proportion of each raw material in the aqueous pigment inkjet ink, the printed products produced by this invention have good color density. In addition, the ink exhibits excellent printing continuity, excellent mounting performance, and excellent cleaning performance, as well as good standby performance.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. It should be noted that for those skilled in the art and any person skilled in the art, any equivalent substitutions or changes made to the technical solution and inventive concept of the present invention without departing from the overall concept of the present invention, as well as any changes and improvements made, should also be considered within the scope of protection of the present invention.

Claims

1. An aqueous pigment inkjet ink containing isotridecanol polyoxyethylene ether, characterized by: The ink includes the following components by mass percentage: 40-50% of aqueous colorant, 10-30% of viscosity modifier, 0.1-5% of substrate wetting agent, 3-7% of isotridecanol polyoxyethylene ether, 0.1-3% of pH regulator, 3-8% of polyurethane resin, 0.1-3% of bactericide, 0.1-3% of defoamer, and 7.2-20% of deionized water; the weight percentage of pigment in the aqueous colorant is 10%-20%.

2. The isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 1, characterized in that: The isotridecanol polyoxyethylene ether has a molecular formula of C13H27O(CH2CH2O)nH, and n ranges from 6 to 10.

3. The isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 1, characterized in that: The aqueous colorant includes any one of Shanghai Wangchong aqueous colorant, Zhejiang Namai aqueous colorant, Beijing Enjiesi aqueous colorant, Di'aisheng aqueous colorant, Fulinteng aqueous colorant, Sakada aqueous colorant, and Sanyo aqueous colorant; The viscosity modifier includes at least one of glycerol, triethylene glycol, diethylene glycol, ethylene glycol, 1.2-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, tripropylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol ethyl ether, dipropylene glycol ethyl ether, caprolactam, polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, polypropylene glycol 200, polypropylene glycol 400, polypropylene glycol 600, polypropylene glycol 800, and polypropylene glycol 1000; The substrate wetting agent includes at least one of BYK302, BYK-DYNWET 810, DISPERBYK-190, DISPERBYK-2015, Surfynol 465, Surfynol 604, DYNOL 960, TEGO Airex 920, Surfynol 485, Surfynol 104, Dynol 607, Digold 510, TEGO WET 260, TEGO WET 270, and TEGO WET 280; The pH regulator includes at least one of ethanolamine, diethanolamine, triethanolamine, urea, ammonia water, ammonium carbonate, ammonium bicarbonate, sodium hydroxide, and potassium hydroxide; The defoamer includes one of BYK- 024, BYK- 018, BYK- 019, BYK- 021, BYK- 022, BYK- 023, BYK- 024, BYK- 057, Surfynol DF-110D, Surfynol DF-104E, and Surfynol DF-420 of American Gasification, and Tego foamex 842 of Digold; The bactericide is a benzisothiazolinone bactericide.

4. The isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 1, characterized in that: The pH value of the ink is 8.00-9.00, the viscosity is 3.0-4.5 mPa·s, and the surface tension is 21-31 mN / m.

5. The isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 1, characterized by: Particle size D of the ink 50 ≤ 140 nm, D 95 ≤ 240 nm.

6. The isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 1, characterized in that: The viscosity regulator is glycerol, diethylene glycol and ethylene glycol, the base wetting agent is BYK302, TEGO WET 260; the aqueous pigment inkjet ink comprises the following components by mass percentage: 50% aqueous colorant, 12.5% glycerol, 5% diethylene glycol, 8% ethylene glycol, 1% BYK302, 0.5% TEGO WET 260, 5% isotridecanol polyoxyethylene ether TO8, 0.2% kathon, 0.3% triethanolamine, 8% polyurethane resin, 0.3% Tego foamex 842 and 9.2% deionized water; the weight percentage of pigment in the aqueous colorant is 10%-20%.

7. The method of preparing an isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 1, characterized in that: Each component raw material is weighed separately, mixed uniformly, then subjected to first-stage 1.2μm filter core filtration treatment, then subjected to second-stage 0.45μm filter core filtration treatment, then subjected to third-stage 0.22μm filter core filtration treatment, to obtain the aqueous pigment inkjet ink.

8. The method of preparing an isotridecyl polyoxyethylene ether-containing aqueous pigment inkjet ink according to claim 7, characterized in that: Comprising the following steps, Each component raw material is weighed separately; The viscosity regulator is added to the deionized water, and each component is mixed uniformly; Then the base wetting agent, isotridecanol polyoxyethylene ether, is continuously added, and each component is mixed uniformly; Then the pH regulator and the bactericide are continuously added, and each component is mixed uniformly; Then the polyurethane resin is continuously added, and each component is mixed uniformly; Then the aqueous colorant is continuously added, and each component is mixed uniformly; Then the defoaming agent is continuously added, and each component is mixed uniformly, then subjected to first-stage 1.2μm filter core filtration treatment, then subjected to second-stage 0.45μm filter core filtration treatment, then subjected to third-stage 0.22μm filter core filtration treatment, to obtain the aqueous pigment inkjet ink.

9. The application of the aqueous pigment inkjet ink containing isotridecanol polyoxyethylene ether according to any one of claims 1-8.

10. The application of the aqueous pigment inkjet ink containing isotridecanol polyoxyethylene ether according to any one of claims 1-8 in the field of corrugated paper inkjet printing.

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