Inkjet printing ink for calcium silicon board and preparation method thereof

Abstract

The invention discloses an inkjet printing ink for calcium silicate board, and the inkjet printing ink includes by weight: 8-15 parts of photoinitiator, 40-50 parts of surfactant, 2-5 parts of pH stabilizer, 13-20 parts of adhesive resin, 3-6 parts of copper sulfate, and 4-9 parts of modified polyurethane epoxy acrylate polymer. The ink of the present invention belongs to ultraviolet light curing ink, and the product is added with modified polyurethane epoxy acrylate polymer and photoinitiator mixed liquid on the basis of adhesive resin and surfactant, so that the product can absorb energy of a certain wavelength, generate free radicals, cations, etc., thereby initiating monomer polymerization cross-linking curing, and can be well attached to the calcium silicate board; the product of the present invention has high bonding strength and thermal stability to the calcium silicate board and good moisture resistance, and is suitable for calcium silicate board with smooth surface, easy to absorb and release water molecules, and overcomes the defects of large ink curing shrinkage, brittle film layer after curing, and easy yellowing.

Description

Technical Field

[0001] The invention relates to the technical field of printing inks, and in particular to an inkjet printing ink for a calcium silicate board and a preparation method thereof. Background Art

[0002] Inkjet printing is a non-contact micron-scale printing process that can be achieved by directly spraying nano-sized solutions on flexible or hard substrates. Since the inkjet printing process can directly form patterned films without the need for a mask, it is considered to be a printing process with potential. UV-curable ink is a technology that can bring great benefits to the field of printing ink technology. This technology has its own unique advantages, such as immediate drying, solvent-free inks, ink adhesion on most substrates, coloring power, and excellent film properties, which are factors that make UV-curable inks widely recognized.

[0003] Calcium silicon board, also known as gypsum composite board, is a multi-material, generally composed of natural gypsum powder, white cement, glue, and glass fiber. Calcium silicon board has the properties of fireproof, moisture-proof, sound-proof, and heat-insulating. It can attract water molecules in the air when the indoor air is humid, and release water molecules when the air is dry. It can properly adjust the indoor dryness and humidity and increase comfort.

[0004] Publication No. CN108359312B discloses a UV-LED inkjet printing solder mask ink, which has the characteristics of good high temperature resistance, good adhesion, good heat shock resistance and high hardness, but its curing shrinkage is large, and the film layer is brittle and prone to yellowing after curing; compared with the invention, the product of the present invention has better thermal stability, adhesion and moisture resistance, is suitable for calcium silicate boards with smooth surfaces that easily absorb and release water molecules, and overcomes the defects of brittle film layer and yellowing after curing. Summary of the invention

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The invention provides an inkjet printing ink for a calcium silicate board. The raw materials of the inkjet printing ink include, by weight, 8-15 parts of a photoinitiator, 40-50 parts of a surfactant, 2-5 parts of a pH stabilizer, 13-20 parts of an adhesive resin, 3-6 parts of copper sulfate, and 4-9 parts of a modified polyurethane epoxy acrylate polymer.

[0007] Preferably, the inkjet printing ink raw materials include, by weight: 10-14 parts of photoinitiator, 42-48 parts of surfactant, 2-4 parts of pH stabilizer, 14-17 parts of adhesive resin, 4-5 parts of copper sulfate, and 5-8 parts of modified polyurethane epoxy acrylate polymer.

[0008] Preferably, the inkjet printing ink raw materials include, by weight: 13 parts of photoinitiator, 45 parts of surfactant, 3 parts of pH stabilizer, 16 parts of adhesive resin, 4 parts of copper sulfate, and 7 parts of modified polyurethane epoxy acrylate polymer.

[0009] Copper sulfate has a strong bactericidal effect and is highly soluble and can dissolve quickly in many materials.

[0010] Preferably, the surfactant comprises, by weight: 5-9 parts of chloroethanol, 1-3 parts of N-methylpyrrolidone, 1-2 parts of sodium butylnaphthalenesulfonate, 4-6 parts of benzyl alcohol, and 12-19 parts of propylene glycol methyl ether.

[0011] The preparation method is:

[0012] The chloroethanol and N-methylpyrrolidone were reacted under reflux for 2 hours, cooled, sodium butylnaphthalenesulfonate was dropped, stirred evenly, and the obtained product was poured into the mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain a surfactant.

[0013] Preferably, the pH stabilizer is one of ammonia water and triethanolamine.

[0014] Preferably, the photoinitiator is one of benzoin dimethyl ether, benzophenone, diphenyl acetone, and bisbenzoylphenylphosphine oxide.

[0015] Preferably, the ultraviolet absorption wavelength of the photoinitiator is 300-450 nm.

[0016] Preferably, the preparation method of the modified polyurethane epoxy acrylate polymer is:

[0017] S1. Heat bisphenol A epoxy resin to 90-100°C, add acrylic acid containing triphenylphosphine chloride as a catalyst and hydroquinone as an inhibitor dropwise at a stirring speed of 40-70 r / min, the dropping speed being 120 g / h, and after the dropping is completed, react at a constant temperature of 120°C at a stirring speed of 200-300 r / min;

[0018] S2, measuring the acid value of the reaction solution every 1 hour, raising the temperature to 140-145°C when the acid value drops to 90 mgKOH / g, continuing to measure the acid value of the reaction solution every 1 hour, stopping the reaction when the acid value drops to 7 mgKOH / g, cooling, discharging and setting aside, and obtaining the epoxy acrylate prepolymer;

[0019] S3. Take the above epoxy acrylate prepolymer and heat it to 60°C, add dibutyltin dilaurate and xylene diisocyanate, maintain the temperature at 80°C, add hydroxybutyl acrylate until the isocyanate value reaches the theoretical isocyanate value, and react for 1 hour to obtain a modified polyurethane epoxy acrylate polymer.

[0020] Polyurethane has the characteristics of good toughness and high bonding strength, while epoxy acrylate has the characteristics of high hardness, chemical resistance, fast curing speed, low price, high mechanical strength, etc. By introducing polyurethane chains into the epoxy acrylate structure, the brittleness of epoxy acrylate is effectively improved.

[0021] Preferably, the mass ratio of the bisphenol A epoxy resin to acrylic acid is 1:1.2.

[0022] Preferably, the mass ratio of the epoxy acrylate prepolymer, dibutyltin dilaurate, xylylene diisocyanate and hydroxybutyl acrylate is 9:1:18:20.

[0023] Preferably, the adhesive resin comprises, by weight: 2-4 parts of maleic acid resin, 6-13 parts of polyamide resin, and 1-3 parts of shellac.

[0024] The present invention provides a method for preparing inkjet printing ink for calcium silicate board, comprising the following steps:

[0025] S11, ball-milling the adhesive resin and the surfactant at 50-60° C. until the particle diameter is less than 200 nm, filtering and placing in a mixer, slowly pouring in the inorganic colorant, and stirring evenly to obtain a color paste;

[0026] S12, uniformly mixing the modified polyurethane epoxy acrylate polymer and the photoinitiator to obtain a mixed solution;

[0027] S13, pouring the mixed solution into the color paste, adding copper sulfate and pH stabilizer while stirring at a speed of 120-180 r / min, and stirring evenly to obtain the ink.

[0028] Preferably, the method for using the printing ink in preparing a calcium silicate board is:

[0029] The calcium silicate board prefabricated board is pressed, the inkjet printing ink is sprayed on the prefabricated board, and the prefabricated board is irradiated under ultraviolet light, and the irradiated calcium silicate board prefabricated board is heated and baked at 150-250° C. to obtain a finished calcium silicate board.

[0030] Beneficial effects of the present invention:

[0031] The ink of the present invention belongs to ultraviolet curing ink. By adding a modified polyurethane epoxy acrylate polymer and a photoinitiator mixed liquid on the basis of an adhesive resin and a surfactant, the product can absorb energy of a certain wavelength to generate free radicals, cations, etc., thereby initiating monomer polymerization, cross-linking and curing, and can be well attached to a calcium silicate board. The product of the present invention has high bonding strength, thermal stability and moisture resistance to the calcium silicate board, is suitable for a calcium silicate board with a smooth surface that is easy to absorb and release water molecules, and overcomes the defects of a large ink curing shrinkage rate, a brittle film layer after curing, and easy yellowing. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1.

[0034] The raw materials of the inkjet printing ink of this embodiment include, by weight: 8 parts of photoinitiator, 40 parts of surfactant, 2 parts of pH stabilizer, 13 parts of adhesive resin, 3 parts of copper sulfate, and 4 parts of modified polyurethane epoxy acrylate polymer.

[0035] The method for preparing the inkjet printing ink comprises the following steps:

[0036] S11, ball-milling the adhesive resin and the surfactant at 50° C. until the particle diameter is less than 200 nm, filtering and placing in a blender, slowly pouring in the inorganic colorant, and stirring evenly to obtain a color paste;

[0037] S12, uniformly mixing the modified polyurethane epoxy acrylate polymer and the photoinitiator to obtain a mixed solution;

[0038] S13, pouring the mixed solution into the color paste, adding copper sulfate and pH stabilizer while stirring at a speed of 120 r / min, and stirring evenly to obtain the ink.

[0039] The surfactant of this embodiment includes, by weight, 5 parts of chloroethanol, 1 part of N-methylpyrrolidone, 1 part of sodium butylnaphthalenesulfonate, 4 parts of benzyl alcohol, and 12 parts of propylene glycol methyl ether.

[0040] The preparation method of the surfactant is:

[0041] The chloroethanol and N-methylpyrrolidone were reacted under reflux for 2 hours, cooled, sodium butylnaphthalenesulfonate was dropped, stirred evenly, and the obtained product was poured into the mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain a surfactant.

[0042] The pH stabilizer in this embodiment is ammonia water.

[0043] The photoinitiator of this embodiment is benzoin dimethyl ether.

[0044] The preparation method of the modified polyurethane epoxy acrylate polymer of this embodiment is:

[0045] S1. Heat bisphenol A epoxy resin to 90°C, add acrylic acid containing triphenylphosphine chloride as a catalyst and hydroquinone as an inhibitor dropwise at a stirring speed of 40 r / min, the dropping speed being 120 g / h, and after the dropping is completed, react at a constant temperature of 120°C at a stirring speed of 200 r / min;

[0046] S2, measuring the acid value of the reaction solution every 1 hour, raising the temperature to 140°C when the acid value drops to 90 mgKOH / g, continuing to measure the acid value of the reaction solution every 1 hour, stopping the reaction when the acid value drops to 7 mgKOH / g, cooling, discharging and setting aside, and obtaining the epoxy acrylate prepolymer;

[0047] S3. Take the above epoxy acrylate prepolymer and heat it to 60°C, add dibutyltin dilaurate and xylene diisocyanate, maintain the temperature at 80°C, add hydroxybutyl acrylate until the isocyanate value reaches the theoretical isocyanate value, and react for 1 hour to obtain a modified polyurethane epoxy acrylate polymer.

[0048] The mass ratio of bisphenol A epoxy resin to acrylic acid in this embodiment is 1:1.2.

[0049] The mass ratio of the epoxy acrylate prepolymer, dibutyltin dilaurate, xylylene diisocyanate and hydroxybutyl acrylate in this embodiment is 9:1:18:20.

[0050] The adhesive resin of this embodiment includes, by weight, 2 parts of maleic acid resin, 6 parts of polyamide resin, and 1 part of shellac.

[0051] The method for using the printing ink of this embodiment in preparing a calcium silicate board is as follows:

[0052] The calcium silicate board prefabricated plate is pressed, the inkjet printing ink is sprayed on the prefabricated plate, and the prefabricated plate is irradiated under ultraviolet light, and the irradiated calcium silicate board prefabricated plate is heated and baked at 150° C. to obtain a finished calcium silicate board.

[0053] Example 2.

[0054] The raw materials of the inkjet printing ink of this embodiment include, by weight: 15 parts of photoinitiator, 50 parts of surfactant, 5 parts of pH stabilizer, 20 parts of adhesive resin, 6 parts of copper sulfate, and 9 parts of modified polyurethane epoxy acrylate polymer.

[0055] The preparation method of the inkjet printing ink is:

[0056] S11, ball-milling the adhesive resin and the surfactant at 60° C. until the particle diameter is less than 200 nm, filtering and placing in a blender, slowly pouring in the inorganic colorant, and stirring evenly to obtain a color paste;

[0057] S12, uniformly mixing the modified polyurethane epoxy acrylate polymer and the photoinitiator to obtain a mixed solution;

[0058] S13, pouring the mixed solution into the color paste, adding copper sulfate and pH stabilizer while stirring at a speed of 180 r / min, and stirring evenly to obtain the ink.

[0059] The surfactant of this embodiment includes, by weight, 9 parts of chloroethanol, 3 parts of N-methylpyrrolidone, 2 parts of sodium butylnaphthalenesulfonate, 6 parts of benzyl alcohol, and 19 parts of propylene glycol methyl ether.

[0060] The preparation method of the surfactant is:

[0061] The chloroethanol and N-methylpyrrolidone were reacted under reflux for 2 hours, cooled, sodium butylnaphthalenesulfonate was dropped, stirred evenly, and the obtained product was poured into the mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain a surfactant.

[0062] The pH stabilizer in this embodiment is one of triethanolamines.

[0063] The photoinitiator of this embodiment is bisbenzoylphenylphosphine oxide.

[0064] The preparation method of the modified polyurethane epoxy acrylate polymer of this embodiment is:

[0065] S1. Heat bisphenol A epoxy resin to 100°C, add acrylic acid containing triphenylphosphine chloride as a catalyst and hydroquinone as an inhibitor dropwise at a stirring speed of 70 r / min, the dropping speed being 120 g / h, and after the dropping is completed, react at a constant temperature of 120°C at a stirring speed of 300 r / min;

[0066] S2, measuring the acid value of the reaction solution every 1 hour, raising the temperature to 140-145°C when the acid value drops to 90 mgKOH / g, continuing to measure the acid value of the reaction solution every 1 hour, stopping the reaction when the acid value drops to 7 mgKOH / g, cooling, discharging and setting aside, and obtaining the epoxy acrylate prepolymer;

[0067] S3. Take the above epoxy acrylate prepolymer and heat it to 60°C, add dibutyltin dilaurate and xylene diisocyanate, maintain the temperature at 80°C, add hydroxybutyl acrylate until the isocyanate value reaches the theoretical isocyanate value, and react for 1 hour to obtain a modified polyurethane epoxy acrylate polymer.

[0068] The mass ratio of bisphenol A epoxy resin to acrylic acid in this embodiment is 1:1.2.

[0069] The mass ratio of the epoxy acrylate prepolymer, dibutyltin dilaurate, xylylene diisocyanate and hydroxybutyl acrylate in this embodiment is 9:1:18:20.

[0070] The adhesive resin of this embodiment includes, by weight: 4 parts of maleic acid resin, 13 parts of polyamide resin, and 3 parts of shellac.

[0071] The method for using the printing ink of this embodiment in preparing a calcium silicate board is as follows:

[0072] The calcium silicate board prefabricated plate is pressed, the inkjet printing ink is sprayed on the prefabricated plate, and the prefabricated plate is irradiated under ultraviolet light, and the irradiated calcium silicate board prefabricated plate is heated and baked at 1250° C. to obtain a finished calcium silicate board.

[0073] Example 3.

[0074] The raw materials of the inkjet printing ink of this embodiment include, by weight: 13 parts of photoinitiator, 45 parts of surfactant, 3 parts of pH stabilizer, 16 parts of adhesive resin, 4 parts of copper sulfate, and 7 parts of modified polyurethane epoxy acrylate polymer.

[0075] The preparation method of the inkjet printing ink is:

[0076] S11, ball-milling the adhesive resin and the surfactant at 55° C. until the particle diameter is less than 200 nm, filtering and placing in a blender, slowly pouring in the inorganic colorant, and stirring evenly to obtain a color paste;

[0077] S12, uniformly mixing the modified polyurethane epoxy acrylate polymer and the photoinitiator to obtain a mixed solution;

[0078] S13, pouring the mixed solution into the color paste, adding copper sulfate and pH stabilizer while stirring at a speed of 160 r / min, and stirring evenly to obtain the ink.

[0079] The surfactant of this embodiment includes, by weight, 7 parts of chloroethanol, 2 parts of N-methylpyrrolidone, 1 part of sodium butylnaphthalenesulfonate, 5 parts of benzyl alcohol, and 16 parts of propylene glycol methyl ether.

[0080] The preparation method of the surfactant is:

[0081] The chloroethanol and N-methylpyrrolidone were reacted under reflux for 2 hours, cooled, sodium butylnaphthalenesulfonate was dropped, stirred evenly, and the obtained product was poured into the mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain a surfactant.

[0082] The pH stabilizer in this embodiment is ammonia water.

[0083] The photoinitiator in this embodiment is benzophenone.

[0084] The preparation method of the modified polyurethane epoxy acrylate polymer of this embodiment is:

[0085] S1. Heat bisphenol A epoxy resin to 95°C, add acrylic acid containing triphenylphosphine chloride as a catalyst and hydroquinone as an inhibitor dropwise at a stirring speed of 55 r / min at a dropping speed of 120 g / h, and after the dropping is completed, react at a constant temperature of 120°C at a stirring speed of 250 r / min;

[0086] S2, measuring the acid value of the reaction solution every 1 hour, raising the temperature to 140°C when the acid value drops to 90 mgKOH / g, continuing to measure the acid value of the reaction solution every 1 hour, stopping the reaction when the acid value drops to 7 mgKOH / g, cooling, discharging and setting aside, and obtaining the epoxy acrylate prepolymer;

[0087] S3. Take the above epoxy acrylate prepolymer and heat it to 60°C, add dibutyltin dilaurate and xylene diisocyanate, maintain the temperature at 80°C, add hydroxybutyl acrylate until the isocyanate value reaches the theoretical isocyanate value, and react for 1 hour to obtain a modified polyurethane epoxy acrylate polymer.

[0088] The mass ratio of bisphenol A epoxy resin to acrylic acid in this embodiment is 1:1.2.

[0089] The mass ratio of the epoxy acrylate prepolymer, dibutyltin dilaurate, xylylene diisocyanate and hydroxybutyl acrylate in this embodiment is 9:1:18:20.

[0090] The adhesive resin of this embodiment includes, by weight: 3 parts of maleic acid resin, 10 parts of polyamide resin, and 2 parts of shellac.

[0091] The method for using the printing ink of this embodiment in preparing a calcium silicate board is as follows:

[0092] The calcium silicate board prefabricated plate is pressed, the inkjet printing ink is sprayed on the prefabricated plate, and the prefabricated plate is irradiated under ultraviolet light, and the irradiated calcium silicate board prefabricated plate is heated and baked at 200° C. to obtain a finished calcium silicate board.

[0093] Comparative Example 1.

[0094] The difference from Example 3 is that the modified polyurethane epoxy acrylate polymer is replaced by polyurethane acrylate.

[0095] Comparative Example 2.

[0096] The difference from Example 3 is that the modified polyurethane epoxy acrylate polymer is replaced by epoxy acrylate.

[0097] Comparative Example 3.

[0098] The difference from Example 3 is that the bisphenol A epoxy resin in step S1 of the preparation method of the modified polyurethane epoxy acrylate polymer is replaced by chlorinated polypropylene resin.

[0099] Comparative Example 4.

[0100] The difference from Example 3 is that the acrylic acid in step S1 of the method for preparing the modified polyurethane epoxy acrylate polymer is not added with any catalyst or polymerization inhibitor, but is directly replaced by acrylic acid.

[0101] Comparative Example 5.

[0102] The difference from Example 3 is that copper sulfate was not added.

[0103] Comparative Example 6.

[0104] The difference from Example 3 is that the adhesive resin in Comparative Example 6 is a polyamide resin.

[0105] Comparative Example 7.

[0106] The difference from Example 3 is that the surfactant preparation method of Comparative Example 7 is different: chloroethanol and N-methylpyrrolidone are reacted at room temperature for 2 hours, and the obtained product is poured into a mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain a surfactant.

[0107] Calcium silicate boards using the ink of the present invention were prepared according to Examples 1-3 and Comparative Examples 1-6, and various performance tests were performed as follows:

[0108] Surface tension: Use a surface tension meter to test the surface tension of the ink;

[0109] Thermal stability test: place the sample at 150°C for 1 hour, and no cracking is required;

[0110] Adhesion test: Tested according to standard QB / T4580-2013, requiring the adhesion level to be level 0, i.e. no peeling;

[0111] Moisture-proof test: Soak the sample in water for 48 hours. No mold is generated and no yellowing of the ink is required.

[0112] The product performance tests of Examples 1-3 and Comparative Examples 1-7 are as follows:

[0113]

[0114] It can be seen from Examples 1-3 that the product of the present invention has high bonding strength to calcium silicate board, thermal stability, certain antibacterial ability and moisture-proof ability, is suitable for calcium silicate board with a smooth surface that easily absorbs and releases water molecules, has a small ink curing shrinkage rate, and is not easy to yellow.

[0115] It can be seen from Comparative Example 1 and Example 3 that when the modified polyurethane epoxy acrylate polymer is replaced with epoxy acrylate, the product has poor adhesion, is easy to yellow, and has relatively poor thermal stability.

[0116] It can be seen from Comparative Example 2 and Example 3 that when the modified polyurethane epoxy acrylate polymer is replaced with epoxy acrylate, the product has poor adhesion, is easy to yellow, and has relatively poor thermal stability.

[0117] It can be seen from Comparative Example 3 and Example 3 that when the bisphenol A epoxy resin in step S1 of the modified polyurethane epoxy acrylate polymer preparation method is replaced with chlorinated polypropylene resin, the product has poor adhesion, is easy to yellow, and has relatively poor thermal stability.

[0118] It can be seen from Comparative Example 4 and Example 3 that the acrylic acid in step S1 of the method for preparing the modified polyurethane epoxy acrylate polymer is directly replaced by acrylic acid without adding any catalyst or inhibitor. The product has poor adhesion, is easy to yellow, and has relatively poor thermal stability.

[0119] It can be seen from Comparative Example 5 and Example 3 that without adding copper sulfate, the moisture-proof and antibacterial ability of the product is relatively poor.

[0120] It can be seen from Comparative Example 6 and Example 3 that the adhesive resin is a polyamide resin, which has a certain negative impact on the adhesion of the product.

[0121] It can be seen from Comparative Example 7 and Example 3 that the preparation method of the surfactant of Comparative Example 7 is: react chloroethanol and N-methylpyrrolidone at room temperature for 2 hours, and pour the obtained product into the mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain the surfactant. The surface tension of the product is poor, it is not easy to form ink droplets, and it is easy to clog the print head.

[0122] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0123] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An inkjet printing ink for calcium silicate board, characterized in that: The inkjet printing ink raw materials include, by weight: 8-15 parts of photoinitiator, 40-50 parts of surfactant, 2-5 parts of pH stabilizer, 13-20 parts of adhesive resin, 3-6 parts of copper sulfate, and 4-9 parts of modified polyurethane epoxy acrylate polymer; The inkjet printing ink for calcium silicate board also includes inorganic colorant; The surfactant comprises, by weight: 5-9 parts of chloroethanol, 1-3 parts of N-methylpyrrolidone, 1-2 parts of sodium butylnaphthalenesulfonate, 4-6 parts of benzyl alcohol, and 12-19 parts of propylene glycol methyl ether; The preparation method of the surfactant comprises the following steps: The chloroethanol and N-methylpyrrolidone were reacted under reflux for 2 hours, cooled, sodium butylnaphthalenesulfonate was added dropwise, stirred evenly, and the obtained product was poured into the mixed solution of benzyl alcohol and propylene glycol methyl ether to obtain a surfactant; The preparation method of the modified polyurethane epoxy acrylate polymer is: S1. Heat bisphenol A epoxy resin to 90-100°C, add acrylic acid containing triphenylphosphine chloride as a catalyst and hydroquinone as an inhibitor dropwise at a stirring speed of 40-70 r / min, the dropping speed being 120 g / h, and after the dropping is completed, react at a constant temperature of 120°C at a stirring speed of 200-300 r / min; S2, measuring the acid value of the reaction solution every 1 hour, raising the temperature to 140-145°C when the acid value drops to 90 mgKOH / g, continuing to measure the acid value of the reaction solution every 1 hour, stopping the reaction when the acid value drops to 7 mgKOH / g, cooling, discharging and setting aside, and obtaining the epoxy acrylate prepolymer; S3, take the above epoxy acrylate prepolymer and heat it to 60°C, add dibutyltin dilaurate and xylylene diisocyanate, keep the temperature at 80°C, add hydroxybutyl acrylate until the isocyanate value reaches the theoretical isocyanate value, and react for 1 hour to obtain a modified polyurethane epoxy acrylate polymer; The mass ratio of the bisphenol A epoxy resin to acrylic acid is 1:1.2; The mass ratio of the epoxy acrylate prepolymer, dibutyltin dilaurate, xylylene diisocyanate and hydroxybutyl acrylate is 9:1:18:20; The adhesive resin comprises, by weight: 2-4 parts of maleic acid resin, 6-13 parts of polyamide resin, and 1-3 parts of shellac.

2. The inkjet printing ink for calcium silicate board according to claim 1, characterized in that: The inkjet printing ink raw materials include, by weight: 10-14 parts of photoinitiator, 42-48 parts of surfactant, 2-4 parts of pH stabilizer, 14-17 parts of adhesive resin, 4-5 parts of copper sulfate, and 5-8 parts of modified polyurethane epoxy acrylate polymer.

3. The inkjet printing ink for calcium silicate board according to claim 1, characterized in that: The inkjet printing ink raw materials include, by weight: 13 parts of photoinitiator, 45 parts of surfactant, 3 parts of pH stabilizer, 16 parts of adhesive resin, 4 parts of copper sulfate, and 7 parts of modified polyurethane epoxy acrylate polymer.

4. The inkjet printing ink for calcium silicate board according to claim 1, characterized in that: The pH stabilizer is one of ammonia water and triethanolamine.

5. The inkjet printing ink for calcium silicate board according to claim 1, characterized in that: The photoinitiator is one of benzoin dimethyl ether, benzophenone, diphenyl acetone, and bisbenzoylphenyl phosphine oxide.

6. The method for preparing the inkjet printing ink for calcium silicate board according to any one of claims 1 to 5, characterized in that: The following steps are involved: S11, ball-milling the adhesive resin and the surfactant at 50-60° C. until the particle diameter is less than 200 nm, filtering and placing in a mixer, slowly pouring in the inorganic colorant, and stirring evenly to obtain a color paste; S12, uniformly mixing the modified polyurethane epoxy acrylate polymer and the photoinitiator to obtain a mixed solution; S13, pouring the mixed solution into the color paste, adding copper sulfate and pH stabilizer while stirring at a speed of 120-180 r / min, and stirring evenly to obtain the ink.

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