High-adhesion rapid-curing water-based ink

Abstract

The invention discloses water-based ink with high adhesive force and rapid curing. The water-based ink is prepared from the following raw materials in parts by weight: 10-15 parts of modified resin, 10-15 parts of pigment, 20-25 parts of a solvent, 3-5 parts of a modified flatting agent, 1-2 parts of a defoaming agent and 1-2 parts of a photoinitiator, compared with the prior art, the water-based ink has the advantages that the binder resin and the assistant flatting agent are modified, terminal double bonds are introduced into the resin and the flatting agent, and self-crosslinking and external crosslinking are carried out under the action of the photoinitiator and UV light, so that the water-based ink is rapidly cured, the water-based ink has good adhesive force and high curing speed, meanwhile, the surface mechanical property of the water-based ink can be improved, and the service life of the water-based ink is prolonged. And the modified leveling agent contains silicone oil straight chain and side chain polyether, so that the dispersion of the pigment in the water-based ink is improved, and the water resistance and light fastness of the ink are enhanced.

Description

Technical Field

[0001] The present invention relates to the field of water-based inks, and particularly to a water-based ink with high adhesion and rapid curing. Background Art

[0002] As an environment-friendly ink, water-based ink has been increasingly favored by the packaging and printing industry worldwide due to its characteristics of less volatile organic compounds during the printing process, no harm to the health of printing operators, and little impact on the environment. Water-based ink is mainly composed of water-soluble resin, pigment, solvent and related additives through compound grinding and processing. The water-soluble resin, that is, the binder, is an important component of water-based ink, which directly affects the adhesion performance, drying speed, anti-tackiness performance and heat resistance of the ink. At the same time, it also affects the gloss and ink transfer performance.

[0003] Acrylic resin is a common water-soluble resin, which can be used as an efficient wetting agent and grinding agent. Using it in water-based ink helps with dispersion and coloring, has good gloss, can reduce the amount of pigment used, and is beneficial to environmental protection. However, the disadvantage of acrylic resin is slow drying and poor continuous film-forming property; silicone leveling agent is a common leveling agent, which can form a monolayer on the surface of the ink coating, making it have uniform surface tension, while enabling good wetting of the bottom layer of the ink and uniform flow of the top layer, and can avoid coating surface defects such as pinholes, orange peel, and flow marks. However, silicone materials also have disadvantages such as low hardness, low strength, poor compatibility with other materials, and low adhesion. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a water-based ink with high adhesion and rapid curing.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A water-based ink with high adhesion and rapid curing, comprising the following raw materials in parts by weight: 10 - 15 parts of modified resin, 10 - 15 parts of pigment, 20 - 25 parts of solvent, 3 - 5 parts of modified leveling agent, 1 - 2 parts of defoaming agent, and 1 - 2 parts of photoinitiator;

[0007] The water-based ink with high adhesion and rapid curing is synthesized by the following steps:

[0008] Add the modified resin and pigment into the solvent, stir for 30 min under the condition of a stirring rate of 1000 - 1200 rpm, then add the modified leveling agent and defoaming agent, continue to stir for 30 min under the condition of a stirring rate of 1000 - 1200 rpm, finally add the photoinitiator, and then continue to stir for 10 min under the condition of a stirring rate of 1000 - 1200 rpm to obtain the water-based ink with high adhesion and rapid curing;

[0009] The modified resin is prepared by the following steps:

[0010] A1: Add isophorone diisocyanate and 2,2-dimethylolbutanoic acid into a container, add dibutyltin dilaurate, and react at a stirring rate of 100-200 rpm and 50 °C for 2 h to obtain intermediate 1. The dosage ratio of isophorone diisocyanate, 2,2-dimethylolbutanoic acid and dibutyltin dilaurate is 1 mol: 1.2-1.4 mol: 0.005 mol;

[0011] During the reaction, a nucleophilic reaction occurs between isophorone diisocyanate and 2,2-dimethylolbutanoic acid to obtain intermediate 1 capped with isocyanate groups;

[0012]

[0013] A2: Add intermediate 1 and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react at a stirring rate of 200-300 rpm and 50 °C for 3-4 h, then carry out rotary evaporation under reduced pressure to obtain intermediate 2. The dosage ratio of intermediate 1, hydroxyethyl acrylate and dibutyltin dilaurate is 1 mol: 2-2.2 mol: 0.005 mol;

[0014] During the reaction, the isocyanate group in intermediate 1 reacts with the hydroxyl group in hydroxyethyl acrylate to obtain intermediate 2, introducing a terminal double bond;

[0015]

[0016] A3: Under the protection of nitrogen, add intermediate 2 and polyacrylic acid into N,N-dimethylacetamide, stir and add 1,6-hexanediamine, and react at a stirring rate of 200-300 rpm and 120 °C for 4-6 h, then carry out rotary evaporation under reduced pressure to obtain the modified resin. The dosage ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine and N,N-dimethylacetamide is 1 mol: 1-1.2 mol: 2-2.2 mol: 500 mL;

[0017] During the reaction process, the carboxyl groups in intermediate 2 and polyacrylic acid react with the amino groups in 1,6-hexanediamine to form an amide structure, resulting in a modified resin. 1,6-Hexanediamine connects intermediate 2 and polyacrylic acid to form a cross-linked network structure, which can effectively improve the surface mechanical properties after the ink is cured. Moreover, the obtained modified resin contains a large number of carboxyl groups, making the modified resin have good hydrophilicity. At the same time, intermediate 2 with a polyurethane structure and terminal double bond groups is introduced. The polyurethane structure can effectively improve the water absorption performance of the ink, while the terminal double bond groups provide unsaturated active groups for subsequent UV curing, which can effectively improve the curing ability of the ink. After the cross-linking of intermediate 2 and polyacrylic acid, it has good adhesion on non-absorbent substrates, which can effectively improve the adhesion of the ink;

[0018]

[0019] The modified leveling agent is prepared by the following steps:

[0020] B1: Under the condition of nitrogen protection, add hydrogen-containing silicone oil and chloroplatinic acid isopropanol solution to toluene, stir and heat up to 100 °C, slowly dropwise add 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, and react at a stirring rate of 200 - 300 rpm and 100 °C for 10 - 12 h. Carry out rotary evaporation under reduced pressure, filter and wash three times with methanol, and dry in vacuum at 80 °C for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil is 2000, the hydrogen content is 0.2%, the mass fraction of the chloroplatinic acid isopropanol solution is 0.1%, and the dosage ratio of the hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, chloroplatinic acid isopropanol solution and toluene is 300 g: 0.4 - 0.5 mol: 5 mL: 200 mL;

[0021] During the reaction process, the silicon-hydrogen bond in the hydrogen-containing silicone oil and the double bond in 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol undergo a hydrosilylation reaction under the action of a platinum catalyst, introducing side-chain hydroxyl groups to obtain intermediate a;

[0022]

[0023] B2: Under the condition of nitrogen protection, add intermediate a, 4,4'-diisocyanatodicyclohexylmethane and polypropylene glycol into a container, heat up to 80 °C, add dibutyltin dilaurate, and react at a stirring rate of 200 - 300 rpm and 80 °C for 3 - 4 h. Carry out rotary evaporation under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol is 500, and the dosage ratio of intermediate a, polypropylene glycol, 4,4'-diisocyanatodicyclohexylmethane and dibutyltin dilaurate is 400 g: 300 g: 1.2 - 1.5 mol: 0.005 mol;

[0024] During the reaction process, the hydroxyl groups in intermediate a and polypropylene glycol react with the isocyanate groups in 4,4'-diisocyanatodicyclohexylmethane, introducing side-chain polyethers and isocyanate groups to obtain intermediate b;

[0025]

[0026] B3: Under the condition of nitrogen protection, add intermediate b and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react for 3 - 4 h under the conditions of a stirring rate of 200 - 300 rpm and 50 °C, then perform rotary evaporation under reduced pressure to obtain the modified leveling agent. The dosage ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate is 100 g : 0.8 - 1 mol : 0.005 mol;

[0027] During the reaction process, the isocyanate groups on intermediate b react with the hydroxyl groups in hydroxyethyl acrylate, introducing double-bond ends to obtain the modified leveling agent. The modified leveling agent contains silicone oil straight chains and side-chain polyethers. Due to the low surface tension of the silicone oil straight chains and the carbophilic compounds and hydrophilic characteristics of the polyether chain segments, the compatibility and adhesion of the silicone oil are effectively improved, making it not only have a good leveling effect like ordinary silicone oil, but also improving the disadvantages of ordinary silicone oil that affect recoating and hydrophobicity, and improving its leveling performance. And the terminal double bonds enable the leveling agent to participate in the curing process of the ink, improving the anti-fouling ability of the ink and accelerating the curing process of the ink;

[0028]

[0029] The pigment is at least one of iron oxide red and organic yellow;

[0030] The solvent is a mixture of water and ethanol, and the volume ratio of water to ethanol is 4 : 1;

[0031] The defoamer is a polyether defoamer;

[0032] The photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenylpropan-1-one and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]propan-1-one.

[0033] Advantages of the present invention: The present invention prepares a water-based ink with high adhesion and rapid curing. By modifying the binder resin and the leveling agent of the additive, the water-based ink has good adhesion and a relatively fast curing speed. Terminal double bonds are introduced into the resin and the leveling agent of the additive. Under the action of a photoinitiator and UV light, self-crosslinking and external crosslinking occur, enabling the water-based ink to cure rapidly, improving the drawback of slow drying speed of polyacrylic acid. In the modified resin, 1,6-hexanediamine connects the intermediate 2 with polyacrylic acid to form a crosslinked network structure, which can effectively improve the surface mechanical properties after the ink cures. At the same time, it contains a large number of carboxyl groups, making the modified resin have good hydrophilicity. And the formed polyurethane structure can effectively improve the water absorption performance of the ink and also improve the adhesion of the water-based ink after curing. The modified leveling agent contains a straight-chain and side-chain polyether of silicone oil. Due to the low surface tension of the straight-chain silicone oil and the characteristics of the carbonophilic compounds and hydrophilicity of the polyether chain segment, the compatibility and adhesion of the silicone oil are effectively improved, enabling it to not only have a good leveling effect like ordinary silicone oil but also improve the drawbacks of ordinary silicone oil affecting recoating and hydrophobicity, and enhancing its leveling performance. The terminal double bond enables the modified leveling agent to participate in the curing process of the water-based ink, and the formed crosslinked structure effectively improves the surface mechanical properties of the water-based ink. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0035] Example 1

[0036] The modified resin is prepared by the following steps:

[0037] A1: Add isophorone diisocyanate and 2,2-dimethylolbutyric acid into a container, add dibutyltin dilaurate, and react for 2 h under the conditions of a stirring rate of 100 rpm and 50 °C to obtain intermediate 1. The dosage ratio of isophorone diisocyanate, 2,2-dimethylolbutyric acid, and dibutyltin dilaurate is 1 mol: 1.2 mol: 0.005 mol;

[0038] A2: Add intermediate 1 and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react for 4 h under the conditions of a stirring rate of 200 rpm and 50 °C, and then perform rotary evaporation under reduced pressure to obtain intermediate 2. The dosage ratio of intermediate 1, hydroxyethyl acrylate, and dibutyltin dilaurate is 1 mol: 2 mol: 0.005 mol;

[0039] A3: Under the condition of nitrogen protection, add intermediate 2 and polyacrylic acid into N,N-dimethylacetamide, stir and add 1,6-hexanediamine, react at a stirring rate of 200 rpm and 120 °C for 4 h, and perform rotary evaporation under reduced pressure to obtain the modified resin. The dosage ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine and N,N-dimethylacetamide is 1 mol: 1 mol: 2 mol: 500 mL;

[0040] Example 2

[0041] The modified resin is prepared by the following steps:

[0042] A1: Add isophorone diisocyanate and 2,2-dimethylolbutanoic acid into a container, add dibutyltin dilaurate, and react at a stirring rate of 200 rpm and 50 °C for 2 h to obtain intermediate 1. The dosage ratio of isophorone diisocyanate, 2,2-dimethylolbutanoic acid and dibutyltin dilaurate is 1 mol: 1.2 mol: 0.005 mol;

[0043] A2: Add intermediate 1 and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react at a stirring rate of 300 rpm and 50 °C for 2 h, and perform rotary evaporation under reduced pressure to obtain intermediate 2. The dosage ratio of intermediate 1, hydroxyethyl acrylate and dibutyltin dilaurate is 1 mol: 2.2 mol: 0.005 mol;

[0044] A3: Under the condition of nitrogen protection, add intermediate 2 and polyacrylic acid into N,N-dimethylacetamide, stir and add 1,6-hexanediamine, react at a stirring rate of 300 rpm and 120 °C for 6 h, and perform rotary evaporation under reduced pressure to obtain the modified resin. The dosage ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine and N,N-dimethylacetamide is 1 mol: 1 mol: 2 mol: 500 mL;

[0045] Example 3

[0046] The modified resin is prepared by the following steps:

[0047] A1: Add isophorone diisocyanate and 2,2-dimethylolbutanoic acid into a container, add dibutyltin dilaurate, and react at a stirring rate of 200 rpm and 50 °C for 2 h to obtain intermediate 1. The dosage ratio of isophorone diisocyanate, 2,2-dimethylolbutanoic acid and dibutyltin dilaurate is 1 mol: 1.4 mol: 0.005 mol;

[0048] A2: Add intermediate 1 and dibutyltin dilaurate into a container, stir and slowly dropwise add 2-hydroxyethyl acrylate. React for 4 h under the conditions of a stirring rate of 300 rpm and 50 °C, and perform rotary evaporation under reduced pressure to obtain intermediate 2. The dosage ratio of intermediate 1, 2-hydroxyethyl acrylate and dibutyltin dilaurate is 1 mol: 2.2 mol: 0.005 mol;

[0049] A3: Under the condition of nitrogen protection, add intermediate 2 and polyacrylic acid into N,N-dimethylacetamide, stir and add 1,6-hexanediamine. React for 6 h under the conditions of a stirring rate of 300 rpm and 120 °C, and perform rotary evaporation under reduced pressure to obtain the modified resin. The dosage ratio of intermediate 2, polyacrylic acid, 1,6-hexanediamine and N,N-dimethylacetamide is 1 mol: 1 - 1.2 mol: 2 - 2.2 mol: 500 mL;

[0050] Example 4

[0051] The modified leveling agent is prepared by the following steps:

[0052] B1: Under the condition of nitrogen protection, add hydrogen-containing silicone oil and chloroplatinic acid isopropanol solution into toluene, stir and heat up to 100 °C, slowly dropwise add 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol. React for 10 - 12 h under the conditions of a stirring rate of 200 - 300 rpm and 100 °C, and perform rotary evaporation under reduced pressure. Filter and wash three times with methanol, and vacuum dry at 80 °C for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil is 2000, the hydrogen content is 0.2%, the mass fraction of the chloroplatinic acid isopropanol solution is 0.1%, and the dosage ratio of the hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, chloroplatinic acid isopropanol solution and toluene is 300 g: 0.4 - 0.5 mol: 5 mL: 200 mL;

[0053] B2: Under the condition of nitrogen protection, add intermediate a, 4,4'-diisocyanatodicyclohexylmethane and polypropylene glycol into a container, heat up to 80 °C, add dibutyltin dilaurate. React for 3 - 4 h under the conditions of a stirring rate of 200 - 300 rpm and 80 °C, and perform rotary evaporation under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol is 500, and the dosage ratio of intermediate a, polypropylene glycol, 4,4'-diisocyanatodicyclohexylmethane and dibutyltin dilaurate is 400 g: 300 g: 1.2 - 1.5 mol: 0.005 mol;

[0054] B3: Under the condition of nitrogen protection, add intermediate b and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate. React at a stirring rate of 200 - 300 rpm and 50 °C for 3 - 4 h, then perform rotary evaporation under reduced pressure to obtain the modified leveling agent. The dosage ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate is 100 g : 0.8 - 1 mol : 0.005 mol;

[0055] Example 5

[0056] The said modified leveling agent is prepared by the following steps:

[0057] B1: Under the condition of nitrogen protection, add hydrogen-containing silicone oil and isopropyl alcohol solution of chloroplatinic acid into toluene, stir and heat up to 100 °C, slowly dropwise add 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol. React at a stirring rate of 300 rpm and 100 °C for 12 h, then perform rotary evaporation under reduced pressure, filter and wash three times with methanol, and dry in vacuum at 80 °C for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil is 2000, the hydrogen content is 0.2%, the mass fraction of the isopropyl alcohol solution of chloroplatinic acid is 0.1%, and the dosage ratio of the hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropyl alcohol solution of chloroplatinic acid and toluene is 300 g : 0.4 mol : 5 mL : 200 mL;

[0058] B2: Under the condition of nitrogen protection, add intermediate a, 4,4'-diisocyanatodicyclohexylmethane and polypropylene glycol into a container, heat up to 80 °C, add dibutyltin dilaurate, and react at a stirring rate of 300 rpm and 80 °C for 4 h. Then perform rotary evaporation under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol is 500, and the dosage ratio of intermediate a, polypropylene glycol, 4,4'-diisocyanatodicyclohexylmethane and dibutyltin dilaurate is 400 g : 300 g : 1.2 mol : 0.005 mol;

[0059] B3: Under the condition of nitrogen protection, add intermediate b and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate. React at a stirring rate of 300 rpm and 50 °C for 4 h, then perform rotary evaporation under reduced pressure to obtain the modified leveling agent. The dosage ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate is 100 g : 0.8 mol : 0.005 mol;

[0060] Example 6

[0061] The said modified leveling agent is prepared by the following steps:

[0062] B1: Under the condition of nitrogen protection, add hydrogen-containing silicone oil and isopropyl alcohol solution of chloroplatinic acid into toluene, stir and heat up to 100 °C, slowly dropwise add 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, react for 10 h under the conditions of a stirring rate of 300 rpm and 100 °C, rotary evaporate under reduced pressure, filter and wash three times with methanol, and dry in vacuum at 80 °C for 12 h to obtain intermediate a. The molecular weight of the hydrogen-containing silicone oil is 2000, the hydrogen content is 0.2%, the mass fraction of the isopropyl alcohol solution of chloroplatinic acid is 0.1%, and the dosage ratio of the hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, isopropyl alcohol solution of chloroplatinic acid and toluene is 300 g: 0.5 mol: 5 mL: 200 mL;

[0063] B2: Under the condition of nitrogen protection, add intermediate a, 4,4-diisocyanatodicyclohexylmethane and polypropylene glycol into a container, heat up to 80 °C, add dibutyltin dilaurate, and react for 4 h under the conditions of a stirring rate of 300 rpm and 80 °C, rotary evaporate under reduced pressure to obtain intermediate b. The molecular weight of the polypropylene glycol is 500, and the dosage ratio of intermediate a, polypropylene glycol, 4,4-diisocyanatodicyclohexylmethane and dibutyltin dilaurate is 400 g: 300 g: 1.5 mol: 0.005 mol;

[0064] B3: Under the condition of nitrogen protection, add intermediate b and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react for 4 h under the conditions of a stirring rate of 300 rpm and 50 °C, rotary evaporate under reduced pressure to obtain the modified leveling agent. The dosage ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate is 100 g: 1 mol: 0.005 mol;

[0065] Example 7

[0066] A water-based ink with high adhesion and rapid curing, comprising the following raw materials in parts by weight: 10 parts of modified resin, 10 parts of commercially available organic yellow pigment 154, 20 parts of solvent, 3 parts of modified leveling agent, 1 part of commercially available defoaming agent THIX-288 and 1 part of commercially available photoinitiator 2959;

[0067] The solvent is a mixture of water and ethanol, and the volume ratio of water to ethanol is 4:1;

[0068] The water-based ink with high adhesion and rapid curing is synthesized by the following steps:

[0069] Add the modified resin and 154 organic yellow pigment into the solvent, stir for 30 min under the condition that the stirring rate is 1000 rpm, then add the modified leveling agent and THIX-288 defoaming agent, continue to stir for 30 min under the condition that the stirring rate is 1000 rpm, finally add 2959 photoinitiator, and then continue to stir for 10 min under the condition that the stirring rate is 1000 rpm to obtain the water-based ink with high adhesion and fast curing;

[0070] Example 8

[0071] A water-based ink with high adhesion and fast curing, comprising the following raw materials in parts by weight: 10 parts of modified resin, 10 parts of commercially available iron oxide red pigment, 20 parts of solvent, 5 parts of modified leveling agent, 2 parts of commercially available THIX-288 defoaming agent and 2 parts of commercially available 2959 photoinitiator;

[0072] The solvent is a mixture of water and ethanol, and the volume ratio of water to ethanol is 4:1

[0073] The water-based ink with high adhesion and fast curing is synthesized by the following steps:

[0074] Add the modified resin and iron oxide red pigment into the solvent, stir for 30 min under the condition that the stirring rate is 1000 rpm, then add the modified leveling agent and THIX-288 defoaming agent, continue to stir for 30 min under the condition that the stirring rate is 1000 rpm, finally add 2959 photoinitiator, and then continue to stir for 10 min under the condition that the stirring rate is 1000 rpm to obtain the water-based ink with high adhesion and fast curing;

[0075] Example 9

[0076] A water-based ink with high adhesion and fast curing, comprising the following raw materials in parts by weight: 15 parts of modified resin, 15 parts of commercially available 154 organic yellow pigment, 25 parts of solvent, 5 parts of modified leveling agent, 2 parts of commercially available THIX-288 defoaming agent and 2 parts of commercially available 1173 photoinitiator;

[0077] The solvent is a mixture of water and ethanol, and the volume ratio of water to ethanol is 4:1;

[0078] The water-based ink with high adhesion and fast curing is synthesized by the following steps:

[0079] Add the modified resin and 154 organic yellow pigment into the solvent, stir for 30 min under the condition that the stirring rate is 1200 rpm, then add the modified leveling agent and THIX-288 defoaming agent, continue to stir for 30 min under the condition that the stirring rate is 1200 rpm, finally add 1173 photoinitiator, and then continue to stir for 10 min under the condition that the stirring rate is 1200 rpm to obtain the water-based ink with high adhesion and fast curing;

[0080] Comparative Example 1

[0081] Comparative Example 1 is a commercially available polyacrylic acid aqueous ink;

[0082] Comparative Example 2

[0083] In Comparative Example 2, the modified resin in Example 9 was replaced with a commercially available B-811 acrylic resin, and the other steps were exactly the same as in Example 9 to obtain an aqueous ink;

[0084] Comparative Example 3

[0085] In Comparative Example 3, the modified leveling agent in Example 9 was replaced with a commercially available MONENG-1070 silicone leveling agent, and the other steps were exactly the same as in Example 9 to obtain an aqueous ink;

[0086] Take the aqueous inks of Example 7, Example 8, Example 8, Comparative Example 1, Comparative Example 2 and Comparative Example 3, and test their performance according to the standards of GB / T1728-2020, GB / T 6739-2022, GB / T 9286-2021, GB / T13217.2-2009, ASTM D2247–2015, GB / T13217.1-2020 and GB / T 250-2008. The specific test results are as follows in the table:

[0087]

[0088] It can be seen from the test results in the shown table that compared with Comparative Example 1, the performances of Example 7, Example 8 and Example 9 are all better than those of the commercially available aqueous ink; compared with Comparative Example 2, when the modified resin in Example 9 was replaced with a commercially available B-811 acrylic resin, its curing speed, adhesion, hardness and lightfastness grade all decreased significantly. Compared with Comparative Example 3, when the modified leveling agent in Example 9 was replaced with a commercially available MONENG-1070 silicone leveling agent, its curing speed, glossiness and coloring ability all decreased. This shows that the modified resin and the modified leveling agent can effectively improve the curing speed and adhesion of the aqueous ink, and at the same time can also improve its surface mechanical properties, improve the dispersion of pigments in the aqueous ink, and enhance the water and lightfastness of the ink.

[0089] The above content is only examples and explanations of the concept of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the concept of the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A water-based ink with high adhesion and fast curing, characterized in that: It comprises the following raw materials in parts by weight: 10 - 15 parts of modified resin, 10 - 15 parts of pigment, 20 - 25 parts of solvent, 3 - 5 parts of modified leveling agent, 1 - 2 parts of defoaming agent, and 1 - 2 parts of photoinitiator; The high - adhesion and fast - curing water - based ink is synthesized by the following steps: Add the modified resin and pigment into the solvent, stir for 30 min under the condition of a stirring rate of 1000 - 1200 rpm, then add the modified leveling agent and defoaming agent, continue to stir for 30 min under the condition of a stirring rate of 1000 - 1200 rpm, finally add the photoinitiator, and continue to stir for 10 min under the condition of a stirring rate of 1000 - 1200 rpm to obtain the high - adhesion and fast - curing water - based ink.

2. The water-based ink with high adhesion and rapid curing according to claim 1, characterized in that: The modified resin is prepared by the following steps: A1: Add isophorone diisocyanate and 2,2 - dimethylolbutyric acid into a container, add dibutyltin dilaurate, and react at a stirring rate of 100 - 200 rpm and 50 °C for 2 h to obtain intermediate 1; A2: Add intermediate 1 and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react at a stirring rate of 200 - 300 rpm and 50 °C for 3 - 4 h, then perform rotary evaporation under reduced pressure to obtain intermediate 2; A3: Under the condition of nitrogen protection, add intermediate 2 and polyacrylic acid into N,N - dimethylacetamide, stir and add 1,6 - hexanediamine, and react at a stirring rate of 200 - 300 rpm and 120 °C for 4 - 6 h, then perform rotary evaporation under reduced pressure to obtain the modified resin.

3. The water-based ink with high adhesion and rapid curing according to claim 2, characterized in that: In step A1, the dosage ratio of isophorone diisocyanate, 2,2 - dimethylolbutyric acid and dibutyltin dilaurate is 1 mol: 1.2 - 1.4 mol: 0.005 mol; In step A2, the dosage ratio of intermediate 1, hydroxyethyl acrylate and dibutyltin dilaurate is 1 mol: 2 - 2.2 mol: 0.005 mol; In step A3, the dosage ratio of intermediate 2, polyacrylic acid, 1,6 - hexanediamine and N,N - dimethylacetamide is 1 mol: 1 - 1.2 mol: 2 - 2.2 mol: 500 mL.

4. A water-based ink with high adhesion and rapid curing according to claim 1, characterized in that: The modified leveling agent is prepared by the following steps: B1: Under the condition of nitrogen protection, add hydrogen - containing silicone oil and chloroplatinic acid isopropanol solution into toluene, stir and heat up to 100 °C, slowly dropwise add 2 - ethyl - 2 - [(2 - vinyloxy)methyl] - 1,3 - propanediol, and react at a stirring rate of 200 - 300 rpm and 100 °C for 10 - 12 h, then perform rotary evaporation under reduced pressure, filter and wash three times with methanol, and vacuum - dry at 80 °C for 12 h to obtain intermediate a; B2: Under the condition of nitrogen protection, add intermediate a, 4,4 - diisocyanatodicyclohexylmethane and polypropylene glycol into a container, heat up to 80 °C, add dibutyltin dilaurate, and react at a stirring rate of 200 - 300 rpm and 80 °C for 3 - 4 h, then perform rotary evaporation under reduced pressure to obtain intermediate b; B3: Under the condition of nitrogen protection, add intermediate b and dibutyltin dilaurate into a container, stir and slowly dropwise add hydroxyethyl acrylate, and react for 3 - 4 h under the conditions of a stirring rate of 200 - 300 rpm and 50 °C, then perform rotary evaporation under reduced pressure to obtain the modified leveling agent.

5. The water-based ink with high adhesion and fast curing according to claim 4, characterized in that: In step B1, the molecular weight of the hydrogen-containing silicone oil is 2000, the hydrogen content is 0.2%, the mass fraction of the chloroplatinic acid isopropyl alcohol solution is 0.1%, and the dosage ratio of the hydrogen-containing silicone oil, 2-ethyl-2-[(2-vinyloxy)methyl]-1,3-propanediol, the chloroplatinic acid isopropyl alcohol solution and toluene is 300 g : 0.4 - 0.5 mol : 5 mL : 200 mL; In step B2, the molecular weight of the polypropylene glycol is 500, and the dosage ratio of intermediate a, polypropylene glycol, 4,4'-diisocyanatodicyclohexylmethane and dibutyltin dilaurate is 400 g : 300 g : 1.2 - 1.5 mol : 0.005 mol; In step B3, the dosage ratio of intermediate b, hydroxyethyl acrylate and dibutyltin dilaurate is 100 g : 0.8 - 1 mol : 0.005 mol.

6. A water-based ink with high adhesion and fast curing according to claim 1, characterized in that: The pigment is at least one of iron oxide red and organic yellow.

7. A water-based ink with high adhesion and fast curing according to claim 1, characterized in that: The solvent is a mixture of water and ethanol, and the volume ratio of water to ethanol is 4:

1.

8. A water-based ink with high adhesion and rapid curing according to claim 1, characterized in that: The defoamer is a polyether defoamer.

9. A water-based ink with high adhesion and rapid curing according to claim 1, characterized in that: The photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenylpropan-1-one and 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy)phenyl]-1-propanone.

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