UV curing printing ink and preparation method thereof

Abstract

The invention discloses UV-curable printing ink and a preparation method thereof. The UV-curable printing ink is prepared from the following raw materials in parts by weight: 80-100 parts of a binder, 40-60 parts of pigment filler, 1-5 parts of talcum powder, 1-2 parts of a dispersing agent, 1-1.5 parts of a photoinitiator and 0.1-0.2 part of a defoaming agent, double bonds are contained between molecules of the binder, and double bonds are contained at two ends of a molecular chain, so that UV-cured molecules can form a latticed structure, the molecular density of printing ink is further increased, a large number of hydrophobic groups are distributed between molecular chain segments, erosion of water molecules to an ink film can be effectively avoided, and the service life is further prolonged; the modified monomer contains an organic silicon chain segment and a benzene ring structure, so that the prepared printing ink has a very good water-resistant effect, and a side chain contains a large number of sodium sulfonate groups and catechol structures, so that the adhesiveness of the printing ink can be improved, and the printing ink is prevented from falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of ink preparation, and particularly relates to a UV-curable printing ink and a preparation method thereof. Background Art

[0002] UV curing refers to a process in which, under the condition of ultraviolet radiation, photosensitive substances in the system absorb energy within a certain range of wavelengths, are excited to generate a photochemical reaction, and then cleave to produce active free radicals or cations, thereby initiating the polymerization, crosslinking, and curing of prepolymers or reactive monomers in the system, enabling the liquid-phase system to crosslink and polymerize instantaneously. UV-curable printing inks are mainly composed of photosensitive resins, photosensitizers, pigments, and additives. In the application process, UV-curable printing inks have the characteristics of saving energy and space and improving work efficiency. Due to their obvious advantages compared with ordinary solvent-based inks in terms of environmental protection, cost, and efficiency, they have gradually attracted attention. However, since some photosensitive resins are water-soluble resins, the resulting ink films have poor water resistance and are prone to ink peeling after being used for a period of time, thus affecting the use effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a UV-curable printing ink and a preparation method thereof, which solve the problems of general adhesion and easy peeling of UV-curable printing inks in the next stage.

[0004] The purpose of the present invention can be achieved by the following technical solutions: A preparation method of a UV-curable printing ink specifically includes the following steps: Weigh the following raw materials in parts by weight: 80 - 100 parts of a binder, 40 - 60 parts of a pigment filler, 1 - 5 parts of talc powder, 1 - 2 parts of a dispersant, 1 - 1.5 parts of a photoinitiator, and 0.1 - 0.2 parts of an antifoaming agent, and mix the raw materials evenly to obtain the UV-curable printing ink.

[0005] The photoinitiator is one or a mixture of two in any proportion of photoinitiator 184 and photoinitiator 369, the dispersant is one or a mixture of several in any proportion of BYK-190, HR-4017, and YB-401, and the antifoaming agent is one or a mixture of several in any proportion of DAPRO DF7073, DAPRO DF7072, and TEGO FOAMEX 1488.

[0006] Further, the binder is prepared by the following steps: Mix dopamine, propylene oxide and DMF, and carry out a reaction for 3 - 5 h under the conditions of a rotation speed of 120 - 150 r / min, a temperature of 30 - 40 °C, and a pH value of 11 - 12 to obtain intermediate 1. Mix intermediate 1, a modified monomer, polytetrahydrofuran and isophorone diisocyanate, and carry out a reaction for 3 - 5 h under the conditions of a rotation speed of 150 - 200 r / min and a temperature of 90 - 95 °C. Add dimethylolpropionic acid and carry out a reaction for 2 - 3 h. Add hydroxyethyl acrylate and carry out a reaction for 1 - 1.5 h. Add deionized water and cool down to 35 - 40 °C. Add triethylamine and carry out a reaction for 30 - 40 min to obtain a binder.

[0007] Furthermore, the molar ratio of dopamine to propylene oxide is 1:2, and the dosage ratio of intermediate 1, the modified monomer, polytetrahydrofuran, isophorone diisocyanate, dimethylolpropionic acid, hydroxyethyl acrylate, deionized water and triethylamine is 10 mmol:10 mmol:20 mmol:55 mmol:1 mmol:9 mmol:60 mL:1.5 mmol. The molecular weight of polytetrahydrofuran is 2000.

[0008] Furthermore, the modified monomer is prepared by the following steps: Step B1: Mix 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde and ethanol evenly, and under the conditions of a rotation speed of 120 - 150 r / min and a temperature of 40 - 50 °C, stir and add aminopropyldimethylethoxysilane and carry out a reaction for 4 - 6 h to obtain intermediate 2. Mix intermediate 2, acryloyl chloride, sodium hydroxide and DMF evenly, and under the conditions of a rotation speed of 150 - 200 r / min and a temperature of 30 - 40 °C, carry out a reaction for 3 - 5 h to obtain intermediate 3; Step B2: Mix intermediate 3, diphenyldichlorosilane and deionized water, and under the conditions of a rotation speed of 200 - 300 r / min and a temperature of 60 - 70 °C, stir for 10 - 15 min, then add concentrated sulfuric acid and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, and carry out a reaction for 4 - 6 h, and then adjust the pH to neutral to obtain a diamine-terminated polysiloxane; Step B3: Mix the diamine-terminated polysiloxane, epichlorohydrin and DMF, and under the conditions of a rotation speed of 120 - 150 r / min, a temperature of 30 - 40 °C, and a pH value of 11 - 12, carry out a reaction for 3 - 5 h to obtain intermediate 4. Mix intermediate 4, sodium sulfite and DMF, and under the conditions of a rotation speed of 150 - 200 r / min and a temperature of 145 - 150 °C, carry out a reaction for 6 - 8 h to obtain the modified monomer.

[0009] Further, the molar ratio of 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde to 3-(dimethylamino)propyl(diethoxy)silane described in step B1 is 1:2, and the molar ratio of intermediate 2, acryloyl chloride, and sodium hydroxide is 1:2:2.1.

[0010] Further, the dosage ratio of intermediate 3, diphenyldichlorosilane, deionized water, and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane described in step B2 is 1 mmol:2 mmol:20 mL:1.5 mmol.

[0011] Further, the molar ratio of diamine-terminated polysiloxane to epichlorohydrin described in step B3 is 1:4, and the molar ratio of intermediate 4 to sodium sulfite is 1:4.1.

[0012] Beneficial effects of the present invention: A UV-curable printing ink disclosed by the present invention comprises the following raw materials: binder, pigment extender, talcum powder, dispersant, photoinitiator, and defoamer. The binder is prepared by reacting dopamine and propylene oxide in the presence of a basic filler to form new hydroxyl groups, obtaining intermediate 1. Intermediate 1 is reacted with a modified monomer, polytetrahydrofuran, and isophorone diisocyanate to form a polyurethane prepolymer, which is then chain-extended with dimethylolacrylic acid and finally terminated with 2-hydroxyethyl acrylate to obtain the binder. The binder molecules contain double bonds between them and at both ends of the molecular chain, enabling the molecules after UV curing to form a network structure, thereby increasing the molecular density of the printing ink. A large number of hydrophobic groups are distributed between the molecular chain segments, effectively preventing water molecules from eroding the ink film, and thus increasing the service life. The modified monomer is prepared by reacting 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde with 3-(dimethylamino)propyl(diethoxy)silane, causing the aldehyde group on 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde to react with the amino group on 3-(dimethylamino)propyl(diethoxy)silane to form a Schiff base structure, obtaining intermediate 2. Intermediate 2 is reacted with acryloyl chloride, causing the phenolic hydroxyl group on intermediate 2 to react with the acyl chloride on acryloyl chloride, obtaining intermediate 3. Intermediate 3 is hydrolyzed with diphenyldichlorosilane and then polymerized with 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane to form a diamine-terminated polysiloxane. The diamine-terminated polysiloxane is reacted with epichlorohydrin to form new hydroxyl groups, obtaining intermediate 4. Intermediate 4 is reacted with sodium sulfite, causing the chlorine atom site on intermediate 4 to react with intermediate 4, obtaining the modified monomer. The modified monomer contains an organosilicon chain segment and a benzene ring structure, making the prepared printing ink have good water resistance, and the side chain contains a large number of sodium sulfonate groups and catechol structures, which can increase the adhesion of the printing ink, thereby preventing the printing ink from peeling off. Detailed implementation manners

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0014] A preparation method of a UV-curable printing ink specifically includes the following steps: Weigh the following raw materials in parts by weight: 80 parts of binder, 40 parts of pigment extender, 1 part of talcum powder, 1 part of dispersant, 1 part of photoinitiator, and 0.1 part of defoamer. Mix the raw materials evenly to obtain the UV-curable printing ink.

[0015] The photoinitiator is photoinitiator 184, the dispersant is BYK-190, and the defoamer is DAPRO DF7073.

[0016] The binder is prepared by the following steps: Mix dopamine, propylene oxide, and DMF, and carry out a reaction for 3 h under the conditions of a rotation speed of 120 r / min, a temperature of 30 °C, and a pH value of 11 to obtain intermediate 1. Mix intermediate 1, modified monomer, polytetrahydrofuran, and isophorone diisocyanate, and carry out a reaction for 3 h under the conditions of a rotation speed of 150 r / min and a temperature of 90 °C. Add dimethylolpropionic acid and carry out a reaction for 2 h. Add hydroxyethyl acrylate and carry out a reaction for 1 h. Add deionized water and cool down to 35 °C. Add triethylamine and carry out a reaction for 30 min to obtain the binder.

[0017] The molar ratio of dopamine to propylene oxide is 1:2, and the dosage ratio of intermediate 1, modified monomer, polytetrahydrofuran, isophorone diisocyanate, dimethylolpropionic acid, hydroxyethyl acrylate, deionized water, and triethylamine is 10 mmol:10 mmol:20 mmol:55 mmol:1 mmol:9 mmol:60 mL:1.5 mmol. The molecular weight of polytetrahydrofuran is 2000.

[0018] The modified monomer is prepared by the following steps: Step B1: Mix 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde and ethanol evenly, stir and add aminopropyldimethylethoxysilane under the conditions of a rotation speed of 120 r / min and a temperature of 40 °C, and carry out a reaction for 4 h to obtain intermediate 2. Mix intermediate 2, acryloyl chloride, sodium hydroxide, and DMF evenly, and carry out a reaction for 3 h under the conditions of a rotation speed of 150 r / min and a temperature of 30 °C to obtain intermediate 3; Step B2: Mix intermediate 3, diphenyldichlorosilane and deionized water, stir for 10 min at a rotation speed of 200 r / min and a temperature of 60 °C, then add concentrated sulfuric acid and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, react for 4 h, and adjust the pH to neutral to obtain diamine-terminated polysiloxane; Step B3: Mix diamine-terminated polysiloxane, epichlorohydrin and DMF, react for 3 h at a rotation speed of 120 r / min, a temperature of 30 °C and a pH value of 11 to obtain intermediate 4. Mix intermediate 4, sodium sulfite and DMF, react for 6 h at a rotation speed of 150 r / min and a temperature of 145 °C to obtain the modified monomer.

[0019] The molar ratio of 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde and aminopropyldimethylethoxysilane described in Step B1 is 1:2, and the molar ratio of intermediate 2, acryloyl chloride and sodium hydroxide is 1:2:2.1.

[0020] The dosage ratio of intermediate 3, diphenyldichlorosilane, deionized water and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane described in Step B2 is 1 mmol:2 mmol:20 mL:1.5 mmol.

[0021] The molar ratio of diamine-terminated polysiloxane and epichlorohydrin described in Step B3 is 1:4, and the molar ratio of intermediate 4 and sodium sulfite is 1:4.1. Example

[0022] A preparation method of a UV-curable printing ink specifically includes the following steps: Weigh the following raw materials in parts by weight: 90 parts of binder, 50 parts of pigment extender, 3 parts of talc powder, 1.5 parts of dispersant, 1.3 parts of photoinitiator and 0.1 part of defoamer, and mix the raw materials evenly to obtain the UV-curable printing ink.

[0023] The photoinitiator is photoinitiator 184, the dispersant is HR-4017, and the defoamer is DAPRO DF7072.

[0024] The binder is prepared by the following steps: Mix dopamine, propylene oxide, and DMF, and react for 4 h under the conditions of a rotation speed of 120 r / min, a temperature of 35 °C, and a pH value of 12 to obtain Intermediate 1. Mix Intermediate 1, a modified monomer, polytetrahydrofuran, and isophorone diisocyanate, and react for 4 h under the conditions of a rotation speed of 150 r / min and a temperature of 93 °C. Add dimethylolpropionic acid and react for 2.5 h. Add hydroxyethyl acrylate and react for 1.3 h. Add deionized water and cool down to 38 °C. Add triethylamine and react for 35 min to obtain a binder.

[0025] The molar ratio of dopamine to propylene oxide is 1:2, and the dosage ratio of Intermediate 1, the modified monomer, polytetrahydrofuran, isophorone diisocyanate, dimethylolpropionic acid, hydroxyethyl acrylate, deionized water, and triethylamine is 10 mmol:10 mmol:20 mmol:55 mmol:1 mmol:9 mmol:60 mL:1.5 mmol. The molecular weight of polytetrahydrofuran is 2000.

[0026] The modified monomer is prepared by the following steps: Step B1: Mix 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde and ethanol evenly, stir and add aminopropyldimethylethoxysilane under the conditions of a rotation speed of 150 r / min and a temperature of 45 °C, and react for 5 h to obtain Intermediate 2. Mix Intermediate 2, acryloyl chloride, sodium hydroxide, and DMF evenly, and react for 4 h under the conditions of a rotation speed of 150 r / min and a temperature of 35 °C to obtain Intermediate 3; Step B2: Mix Intermediate 3, diphenyldichlorosilane, and deionized water, stir for 15 min under the conditions of a rotation speed of 300 r / min and a temperature of 65 °C, then add concentrated sulfuric acid and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, and react for 5 h, and then adjust the pH to neutral to obtain a diamine-terminated polysiloxane; Step B3: Mix the diamine-terminated polysiloxane, epichlorohydrin, and DMF, and react for 3 - 5 h under the conditions of a rotation speed of 120 r / min, a temperature of 35 °C, and a pH value of 12 to obtain Intermediate 4. Mix Intermediate 4, sodium sulfite, and DMF, and react for 7 h under the conditions of a rotation speed of 200 r / min and a temperature of 148 °C to obtain the modified monomer.

[0027] The molar ratio of 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde to aminopropyldimethylethoxysilane in Step B1 is 1:2, and the molar ratio of Intermediate 2, acryloyl chloride, and sodium hydroxide is 1:2:2.1.

[0028] The dosage ratio of intermediate 3, diphenyldichlorosilane, deionized water and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane described in step B2 is 1 mmol: 2 mmol: 20 mL: 1.5 mmol.

[0029] The molar ratio of the diamine-terminated polysiloxane and epichlorohydrin described in step B3 is 1:4, and the molar ratio of intermediate 4 and sodium sulfite is 1:4.1. Example

[0030] A preparation method of a UV-curable printing ink specifically comprises the following steps: Weigh the following raw materials in parts by weight: 100 parts of binder, 60 parts of pigment and filler, 5 parts of talcum powder, 2 parts of dispersant, 1.5 parts of photoinitiator and 0.2 part of defoamer, and mix the raw materials evenly to obtain the UV-curable printing ink.

[0031] The photoinitiator is photoinitiator 369, the dispersant is YB-401, and the defoamer is TEGO FOAMEX 1488.

[0032] The binder is prepared by the following steps: Mix dopamine, propylene oxide and DMF, and carry out a reaction for 5 h under the conditions of a rotation speed of 150 r / min, a temperature of 40 °C and a pH value of 12 to obtain intermediate 1. Mix intermediate 1, a modified monomer, polytetrahydrofuran and isophorone diisocyanate, and carry out a reaction for 5 h under the conditions of a rotation speed of 200 r / min and a temperature of 95 °C. Add dimethylolpropionic acid and carry out a reaction for 3 h. Add hydroxyethyl acrylate and carry out a reaction for 1.5 h. Add deionized water and cool down to 40 °C. Add triethylamine and carry out a reaction for 40 min to obtain the binder.

[0033] The molar ratio of dopamine and propylene oxide is 1:2, and the dosage ratio of intermediate 1, the modified monomer, polytetrahydrofuran, isophorone diisocyanate, dimethylolpropionic acid, hydroxyethyl acrylate, deionized water and triethylamine is 10 mmol: 10 mmol: 20 mmol: 55 mmol: 1 mmol: 9 mmol: 60 mL: 1.5 mmol, and the molecular weight of polytetrahydrofuran is 2000.

[0034] The modified monomer is prepared by the following steps: Step B1: Mix 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde and ethanol evenly. Under the conditions of a rotation speed of 150 r / min and a temperature of 50 °C, stir and add 3-(dimethylamino)propyl(diethoxy)silane, and react for 6 h to obtain Intermediate 2. Mix Intermediate 2, acryloyl chloride, sodium hydroxide and DMF evenly, and react for 5 h under the conditions of a rotation speed of 200 r / min and a temperature of 40 °C to obtain Intermediate 3; Step B2: Mix Intermediate 2, diphenyldichlorosilane and deionized water, stir for 15 min under the conditions of a rotation speed of 300 r / min and a temperature of 70 °C, then add concentrated sulfuric acid and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, react for 6 h, and adjust the pH to neutral to obtain diamine-terminated polysiloxane; Step B3: Mix diamine-terminated polysiloxane, epichlorohydrin and DMF, react for 5 h under the conditions of a rotation speed of 150 r / min, a temperature of 40 °C and a pH value of 12 to obtain Intermediate 4. Mix Intermediate 4, sodium sulfite and DMF, and react for 8 h under the conditions of a rotation speed of 200 r / min and a temperature of 150 °C to obtain a modified monomer.

[0035] The molar ratio of 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde to 3-(dimethylamino)propyl(diethoxy)silane described in Step B1 is 1:2, and the molar ratio of Intermediate 2, acryloyl chloride and sodium hydroxide is 1:2:2.1.

[0036] The dosage ratio of Intermediate 3, diphenyldichlorosilane, deionized water and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane described in Step B2 is 1 mmol:2 mmol:20 mL:1.5 mmol.

[0037] The molar ratio of diamine-terminated polysiloxane to epichlorohydrin described in Step B3 is 1:4, and the molar ratio of Intermediate 4 to sodium sulfite is 1:4.1.

[0038] Comparative Example 1 This comparative example is the same as Example 1 except that Intermediate 1 is not added.

[0039] Comparative Example 2 This comparative example is the same as Example 1 except that the modified monomer is not added.

[0040] Comparative Example 3 This comparative example is the same as Example 1 except that Intermediate 3 is not added.

[0041] The water-based inks prepared in Examples 1-3 and Comparative Examples 1-3 were tested for ink adhesion in accordance with the standard of GB / T13217.7-2009. An adhesion of ≥98% was judged as Grade 0, an adhesion of ≥92% and <98% was judged as Grade 1, and an adhesion of <92% was judged as Grade 2. The ink strips were respectively immersed in water at 100 °C for 24 h, 48 h and 72 h to observe the changes in the ink. The test results are shown in the following table.

[0042]

[0043] As can be seen from the above table, the present application has good adhesion and water resistance.

[0044] The above content is only an example and illustration 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 the claims of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A method for preparing a UV curable printing ink, characterized in that: The specific steps include: Weigh the following raw materials in parts by weight: 80-100 parts of a binder, 40-60 parts of a pigment and filler, 1-5 parts of talcum powder, 1-2 parts of a dispersant, 1-1.5 parts of a photoinitiator and 0.1-0.2 parts of a defoamer, mix the raw materials evenly, and prepare a UV curing printing ink.

2. The method for preparing a UV curable printing ink according to claim 1, characterized in that: The connecting material is prepared by the following steps: Dopamine, propylene oxide and DMF are mixed, and reacted for 3-5 hours at a speed of 120-150 r / min, a temperature of 30-40°C and a pH value of 11-12 to obtain intermediate 1. Intermediate 1, modified monomer, polytetrahydrofuran and isophorone diisocyanate are mixed, and reacted for 3-5 hours at a speed of 150-200 r / min and a temperature of 90-95°C. Dihydroxymethylpropionic acid is added and reacted for 2-3 hours. Hydroxyethyl acrylate is added and reacted for 1-1.5 hours. Deionized water is added and the temperature is lowered to 35-40°C. Triethylamine is added and reacted for 30-40 minutes to obtain a connecting material.

3. The method for preparing a UV curable printing ink according to claim 2, characterized in that: The molar ratio of dopamine to propylene oxide is 1:2, and the usage ratio of intermediate 1, modified monomer, polytetrahydrofuran, isophorone diisocyanate, dihydroxymethylpropionic acid, hydroxyethyl acrylate, deionized water and triethylamine is 10mmol:10mmol:20mmol:55mmol:1mmol:9mmol:60mL:1.5mmol.

4. The method for preparing a UV curable printing ink according to claim 2, characterized in that: The modified monomer is prepared by the following steps: Step B1: 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarboxaldehyde and ethanol are mixed evenly, stirred and aminopropyldimethylethoxysilane is added at a speed of 120-150 r / min and a temperature of 40-50° C., and the mixture is reacted for 4-6 hours to obtain intermediate 1; intermediate 1, acryloyl chloride, sodium hydroxide and DMF are mixed evenly, and the mixture is reacted at a speed of 150-200 r / min and a temperature of 30-40° C. for 3-5 hours to obtain intermediate 2; Step B2: Mix the intermediate 2, diphenyldichlorosilane and deionized water, stir for 10-15 minutes at a speed of 200-300 r / min and a temperature of 60-70° C., add concentrated sulfuric acid and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, react for 4-6 hours, and adjust the pH to neutral to obtain a diamine-terminated polysiloxane; Step B3: Mix diamine-terminated polysiloxane, epichlorohydrin and DMF, and react for 3-5 hours at a rotation speed of 120-150 r / min, a temperature of 30-40°C and a pH value of 11-12 to obtain intermediate 3. Mix intermediate 3, sodium sulfite and DMF, and react for 6-8 hours at a rotation speed of 150-200 r / min and a temperature of 145-150°C to obtain a modified monomer.

5. The method for preparing a UV curable printing ink according to claim 4, characterized in that: The molar ratio of 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarbaldehyde and aminopropyldimethylethoxysilane in step B1 is 1:2, and the molar ratio of intermediate 2, acryloyl chloride and sodium hydroxide is 1:2:2.

1.

6. The method for preparing a UV curable printing ink according to claim 4, characterized in that: The amount ratio of the intermediate 3, diphenyldichlorosilane, deionized water and 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane described in step B2 is 1 mmol:2 mmol:20 mL:1.5 mmol.

7. The method for preparing a UV curable printing ink according to claim 4, characterized in that: The molar ratio of the diamine-terminated polysiloxane to epichlorohydrin in step B3 is 1:4, and the molar ratio of the intermediate 4 to sodium sulfite is 1:4.

1.

8. A UV curable printing ink, characterized in that: Prepared according to any one of claims 1 to 7.

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