Silk-screen printing ink resin, preparation method thereof and application of silk-screen printing ink resin to cigarette packets

Abstract

The invention discloses a silk-screen printing ink resin and a preparation method thereof, and belongs to the technical field of ink preparation, the ink resin comprises the following components: 5-16 parts of an acrylic monomer, 20-50 parts of an acrylate monomer, 4-14 parts of aliphatic polyurethane acrylate, 0.1-1 part of an initiator, 2-8 parts of an emulsifier, 10-50 parts of deionized water, and 0-2 parts of an auxiliary agent. The emulsifier is prepared by taking cis-9-octadecene amine and 1-amino-5-vinyl naphthalene as raw materials and carrying out nucleophilic substitution reaction on the raw materials and benzaldehyde-2-sodium sulfonate; on the basis of the existing acrylic acid / ester resin, the ink resin which is fast to cure and has high adhesive force and flexibility is prepared by optimizing and adjusting components.

Description

Technical Field

[0001] The invention relates to the technical field of ink preparation, and in particular to a screen printing ink resin and a preparation method thereof and application thereof on cigarette packages. Background Art

[0002] In recent years, my country's printing industry has been striving to transform into a sustainable development industry, and green printing has become the main direction of development of my country's printing industry. In particular, in the cigarette packaging printing industry, as my country's tobacco industry has increasingly stringent requirements on the limits of various harmful substances in cigarettes and their packaging, cigarette packaging printing companies have been seeking green and environmentally friendly printing materials.

[0003] Although solvent-based screen printing inks show sufficiently exquisite printing performance, they contain a large amount of organic solvents in their ingredients. During construction, a large amount of organic solvents will be volatilized and discharged, causing pollution to the environment and having a pungent odor, which is not conducive to environmental protection. Water-based inks use water as the main solvent and are made from water-based polymer emulsions, organic pigments, resins, surfactants and related additives through chemical processes and physical mixing. Since water is used to replace 30% to 70% of toxic organic solvents in traditional inks, the ink no longer contains volatile organic solvents. Therefore, there is no adverse effect on the health of workers during the printing process, no pollution to the atmospheric environment, and the hidden dangers of flammable and explosive hazards in the workplace are eliminated, thereby improving safety.

[0004] Water-soluble resin or water-dispersible resin as a binder for water-based ink has an impact on the viscosity, adhesion, gloss, drying and printing adaptability of the ink. At the same time, existing water-based screen printing ink resins generally have problems such as slow curing speed, weak adhesion and poor flexibility, and the use effect is not ideal. Summary of the invention

[0005] In view of the above problems, the present invention provides a screen printing ink resin and a preparation method thereof and application thereof on cigarette packages.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A screen printing ink resin, comprising the following components by weight: 5-16 parts of acrylic acid monomer, 20-50 parts of acrylate monomer, 4-14 parts of aliphatic polyurethane acrylate, 0.1-1 parts of initiator, 2-8 parts of emulsifier, 10-50 parts of deionized water, and 0-2 parts of auxiliary agent;

[0008] Wherein, the preparation method of the emulsifier comprises the following steps:

[0009] Cis-9-octadeceneamine and 1-amino-5-vinylnaphthalene are weighed and dissolved in solvents to obtain a cis-9-octadeceneamine solution and a 1-amino-5-vinylnaphthalene solution; sodium benzaldehyde-2-sulfonate is weighed and dissolved in deionized water to obtain a sodium benzaldehyde-2-sulfonate solution; the cis-9-octadeceneamine solution and the 1-amino-5-vinylnaphthalene solution are slowly added to the sodium benzaldehyde-2-sulfonate solution at room temperature and under stirring conditions; sodium bromide is added after sufficient stirring and mixing; the pH of the mixed system is adjusted to alkaline; the stirring reaction is continued for 10-60 minutes; after the reaction is completed, the precipitate is separated by filtering; and the filtrate is concentrated under reduced pressure to obtain the emulsifier.

[0010] In some preferred embodiments, the acrylate monomer is one or more of methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, isooctyl acrylate, 4-hydroxybutyl acrylate, lauryl acrylate, octadecyl acrylate, octadecyl methacrylate, tripropylene glycol diacrylate, and trimethylolpropane triacrylate.

[0011] In some preferred embodiments, the initiator is one or more of 1-hydroxy-cyclohexyl-phenyl ketone, methyl o-benzoylbenzoate, 4-chlorobenzophenone, oligomeric multifunctional α-hydroxy ketone, and 2-hydroxy-2-methyl-1-phenyl-1-propanone.

[0012] In some preferred embodiments, the auxiliary agent is one or more of a dispersant, a leveling agent, a stabilizer, a softener, a preservative, a defoaming agent, a pH adjuster, an adhesion promoter, an antistatic agent, and a thickener.

[0013] In some preferred embodiments, the molar concentration of the cis-9-octadeceneamine solution is 0.01-0.1 mol / L, and the molar concentration of the 1-amino-5-vinylnaphthalene solution is 0.01-0.1 mol / L.

[0014] In some preferred embodiments, the molar concentration of the sodium benzaldehyde-2-sulfonate solution is 0.01-0.1 mol / L.

[0015] In some preferred embodiments, the molar ratio of the cis-9-octadeceneamine to the 1-amino-5-vinylnaphthalene, the sodium benzaldehyde-2-sulfonate, and the sodium bromide is 1:(1.8-2.5):(8-11):(0.01-0.05).

[0016] In some preferred embodiments, the pH of the mixed system is adjusted to 7.5-10.

[0017] Another object of the present invention is to provide a method for preparing the screen printing ink resin, comprising the following steps:

[0018] S1, weigh each raw material for use;

[0019] S2. Place the deionized water and the emulsifier in a high-speed stirrer and stir and disperse for 1-60 minutes, add the remaining raw materials, continue stirring and dispersing for 1-60 minutes to obtain a slurry, transfer the dispersed slurry to a sand mill or a ball mill for grinding and dispersion until the desired dispersion fineness and concentration are reached, and then filter through a fine mesh screen to obtain a slurry.

[0020] Another object of the present invention is to provide an application method of the screen printing ink resin, specifically, application on cigarette packages.

[0021] The beneficial effects of the present invention are:

[0022] In view of the problems of slow curing speed, weak adhesion and poor flexibility of water-based screen printing ink resin in the prior art, the present invention prepares an ink resin with fast curing speed, high adhesion and flexibility by optimizing and adjusting components on the basis of existing acrylic acid / ester resin. Specifically, the present invention introduces aliphatic polyurethane acrylate for copolymerization and introduces polyurethane segments into the polymer resin to effectively provide the flexibility of the ink resin. Furthermore, the present invention uses cis-9-octadeceneamine and 1-amino-5-vinylnaphthalene as raw materials to react with sodium benzaldehyde-2-sulfonate, connects hydrophilic sodium sulfonate and hydrophobic octadecene through imine bonding, and uses them as emulsifiers for the ink resin system. The dissociation of imine under acidic conditions is utilized to adjust the pH of the ink resin to acidic when the ink resin is used for screen printing, thereby destroying the emulsification stability of the resin system, fully releasing the active monomers inside the emulsified microcapsules, reducing the isolation between monomers caused by the emulsified microcapsules, and thus improving the curing rate. At the same time, the acid-lyzed emulsifier can also introduce vinyl naphthyl groups into the polymer resin, thereby improving the adhesion of the ink. DETAILED DESCRIPTION

[0023] The present invention is further described in conjunction with the following examples.

[0024] Example 1

[0025] A screen printing ink resin, characterized in that it comprises the following components in parts by weight: 10 parts of acrylic acid monomer, 12 parts of methyl acrylate, 12 parts of butyl acrylate, 7 parts of isooctyl acrylate, 3 parts of lauryl acrylate, 6 parts of tripropylene glycol diacrylate, 8.5 parts of aliphatic polyurethane acrylate (CAS No.: 68987-79-1), 0.4 parts of initiator, 7.2 parts of emulsifier, 30 parts of deionized water, and 0.2 parts of light stabilizer;

[0026] The initiator is an oligomeric multifunctional α-hydroxyketone (KIP150) or 2-hydroxy-2-methyl-1-phenyl-1-propanone (DAROCUR 1173);

[0027] The preparation method of the emulsifier comprises the following steps:

[0028] Weigh cis-9-octadeceneamine and 1-amino-5-vinylnaphthalene respectively and dissolve them in ethanol solvent to obtain cis-9-octadeceneamine solution and 1-amino-5-vinylnaphthalene solution, weigh sodium benzaldehyde-2-sulfonate and dissolve them in deionized water to obtain sodium benzaldehyde-2-sulfonate solution, slowly add the cis-9-octadeceneamine solution and the 1-amino-5-vinylnaphthalene solution to the sodium benzaldehyde-2-sulfonate solution at room temperature and stirring, stir and mix thoroughly, then add sodium bromide, adjust the pH of the mixed system to 8.5, continue stirring and reacting for 30 minutes, filter and separate the precipitate after the reaction is completed, and concentrate the filtrate under reduced pressure to obtain the emulsifier;

[0029] The molar concentration of the cis-9-octadeceneamine solution is 0.02 mol / L, the molar concentration of the 1-amino-5-vinylnaphthalene solution is 0.02 mol / L, and the molar concentration of the sodium benzaldehyde-2-sulfonate solution is 0.05 mol / L.

[0030] The molar ratio of the cis-9-octadeceneamine to the 1-amino-5-vinylnaphthalene, the sodium benzaldehyde-2-sulfonate, and the sodium bromide is 1:2.1:10.5:0.03;

[0031] The solid content of the emulsifier is 86.0wt%;

[0032] The light stabilizer is a mixture of 7-hydroxy-4-methylcoumarin and 2,4-dihydroxy-benzophenone in a mass ratio of 1:2;

[0033] The preparation method of the screen printing ink resin comprises the following steps:

[0034] S1, weigh each raw material for use;

[0035] S2. Place the deionized water and the emulsifier in a high-speed stirrer and stir and disperse for 10 minutes, add the remaining raw materials, continue stirring and dispersing for 30 minutes to obtain a slurry, transfer the dispersed slurry to a sand mill or a ball mill, grind and disperse it, and then filter it through a fine mesh screen to obtain a slurry.

[0036] Comparative Example 1

[0037] A screen printing ink resin, characterized in that it comprises the following components in parts by weight: 10 parts of acrylic acid monomer, 12 parts of methyl acrylate, 12 parts of butyl acrylate, 7 parts of isooctyl acrylate, 3 parts of lauryl acrylate, 6 parts of tripropylene glycol diacrylate, 0.4 parts of initiator, 7.2 parts of emulsifier, 30 parts of deionized water, and 0.2 parts of light stabilizer;

[0038] The initiator is an oligomeric multifunctional α-hydroxyketone (KIP150) or 2-hydroxy-2-methyl-1-phenyl-1-propanone (DAROCUR 1173);

[0039] The preparation method of the emulsifier comprises the following steps:

[0040] Weigh cis-9-octadeceneamine and 1-amino-5-vinylnaphthalene respectively and dissolve them in ethanol solvent to obtain cis-9-octadeceneamine solution and 1-amino-5-vinylnaphthalene solution, weigh sodium benzaldehyde-2-sulfonate and dissolve them in deionized water to obtain sodium benzaldehyde-2-sulfonate solution, slowly add the cis-9-octadeceneamine solution and the 1-amino-5-vinylnaphthalene solution to the sodium benzaldehyde-2-sulfonate solution at room temperature and stirring, stir and mix thoroughly, then add sodium bromide, adjust the pH of the mixed system to 8.5, continue stirring and reacting for 30 minutes, filter and separate the precipitate after the reaction is completed, and concentrate the filtrate under reduced pressure to obtain the emulsifier;

[0041] The molar concentration of the cis-9-octadeceneamine solution is 0.02 mol / L, the molar concentration of the 1-amino-5-vinylnaphthalene solution is 0.02 mol / L, and the molar concentration of the sodium benzaldehyde-2-sulfonate solution is 0.05 mol / L.

[0042] The molar ratio of the cis-9-octadeceneamine to the 1-amino-5-vinylnaphthalene, the sodium benzaldehyde-2-sulfonate, and the sodium bromide is 1:2.1:10.5:0.03;

[0043] The solid content of the emulsifier is 86.0wt%;

[0044] The light stabilizer is a mixture of 7-hydroxy-4-methylcoumarin and 2,4-dihydroxy-benzophenone in a mass ratio of 1:2;

[0045] The preparation method of the screen printing ink resin comprises the following steps:

[0046] S1, weigh each raw material for use;

[0047] S2. Place the deionized water and the emulsifier in a high-speed stirrer and stir and disperse for 10 minutes, add the remaining raw materials, continue stirring and dispersing for 30 minutes to obtain a slurry, transfer the dispersed slurry to a sand mill or a ball mill, grind and disperse it, and then filter it through a fine mesh screen to obtain a slurry.

[0048] Comparative Example 2

[0049] A screen printing ink resin, characterized in that it comprises the following components in parts by weight: 10 parts of acrylic acid monomer, 12 parts of methyl acrylate, 12 parts of butyl acrylate, 7 parts of isooctyl acrylate, 3 parts of lauryl acrylate, 6 parts of tripropylene glycol diacrylate, 8.5 parts of aliphatic polyurethane acrylate (CAS No.: 68987-79-1), 0.4 parts of initiator, 7.2 parts of emulsifier, 30 parts of deionized water, and 0.2 parts of light stabilizer;

[0050] The initiator is an oligomeric multifunctional α-hydroxyketone (KIP150) or 2-hydroxy-2-methyl-1-phenyl-1-propanone (DAROCUR 1173);

[0051] The preparation method of the emulsifier comprises the following steps:

[0052] Weigh cis-9-octadeceneamine and dissolve it in an ethanol solvent to obtain a cis-9-octadeceneamine solution, weigh sodium benzaldehyde-2-sulfonate and dissolve it in deionized water to obtain a sodium benzaldehyde-2-sulfonate solution, slowly add the cis-9-octadeceneamine solution to the sodium benzaldehyde-2-sulfonate solution at room temperature and stirring, fully stir and mix, then add sodium bromide, adjust the pH of the mixed system to 8.5, continue stirring and reacting for 30 minutes, filter and separate the precipitate after the reaction is completed, and concentrate the filtrate under reduced pressure to obtain the emulsifier;

[0053] Wherein, the molar concentration of the cis-9-octadeceneamine solution is 0.02 mol / L; and the molar concentration of the sodium benzaldehyde-2-sulfonate solution is 0.05 mol / L.

[0054] The molar ratio of the cis-9-octadeceneamine to the sodium benzaldehyde-2-sulfonate and the sodium bromide is 1:10.5:0.03;

[0055] The solid content of the emulsifier is 86.4wt%;

[0056] The light stabilizer is a mixture of 7-hydroxy-4-methylcoumarin and 2,4-dihydroxy-benzophenone in a mass ratio of 1:2;

[0057] The preparation method of the screen printing ink resin comprises the following steps:

[0058] S1, weigh each raw material for use;

[0059] S2. Place the deionized water and the emulsifier in a high-speed stirrer and stir and disperse for 10 minutes, add the remaining raw materials, continue stirring and dispersing for 30 minutes to obtain a slurry, transfer the dispersed slurry to a sand mill or a ball mill, grind and disperse it, and then filter it through a fine mesh screen to obtain a slurry.

[0060] Comparative Example 3

[0061] A screen printing ink resin, characterized in that it comprises the following components in parts by weight: 10 parts of acrylic acid monomer, 12 parts of methyl acrylate, 12 parts of butyl acrylate, 7 parts of isooctyl acrylate, 3 parts of lauryl acrylate, 6 parts of tripropylene glycol diacrylate, 8.5 parts of aliphatic polyurethane acrylate (CAS No.: 68987-79-1), 0.4 parts of initiator, 7.2 parts of emulsifier, 30 parts of deionized water, and 0.2 parts of light stabilizer;

[0062] The initiator is an oligomeric multifunctional α-hydroxyketone (KIP150) or 2-hydroxy-2-methyl-1-phenyl-1-propanone (DAROCUR 1173);

[0063] The emulsifier is a mixture of nonylphenol polyoxyethylene ether ammonium sulfate and disodium succinate monoester sulfonate in a mass ratio of 1:1;

[0064] The light stabilizer is a mixture of 7-hydroxy-4-methylcoumarin and 2,4-dihydroxy-benzophenone in a mass ratio of 1:2;

[0065] The preparation method of the screen printing ink resin comprises the following steps:

[0066] S1, weigh each raw material for use;

[0067] S2. Place the deionized water and the emulsifier in a high-speed stirrer and stir and disperse for 10 minutes, add the remaining raw materials, continue stirring and dispersing for 30 minutes to obtain a slurry, transfer the dispersed slurry to a sand mill or a ball mill, grind and disperse it, and then filter it through a fine mesh screen to obtain a slurry.

[0068] Example 2

[0069] A screen printing ink resin, characterized in that it comprises the following components by weight: 5 parts of acrylic acid monomer, 6 parts of methyl acrylate, 5 parts of butyl acrylate, 3 parts of isooctyl acrylate, 2 parts of lauryl acrylate, 4 parts of tripropylene glycol diacrylate, 4 parts of aliphatic polyurethane acrylate (CAS No.: 68987-79-1), 0.1 parts of initiator, 2 parts of emulsifier, and 10 parts of deionized water;

[0070] The initiator is the same as in Example 1;

[0071] The emulsifier is the same as in Example 1;

[0072] The preparation method of the screen printing ink resin is the same as that of Example 1.

[0073] Example 3

[0074] A screen printing ink resin, characterized in that it comprises the following components by weight: 16 parts of acrylic acid monomer, 15 parts of methyl acrylate, 15 parts of butyl acrylate, 8 parts of isooctyl acrylate, 5 parts of lauryl acrylate, 6 parts of tripropylene glycol diacrylate, 14 parts of aliphatic polyurethane acrylate (CAS No.: 68987-79-1), 1 part of initiator, 8 parts of emulsifier, and 50 parts of deionized water;

[0075] The initiator is the same as in Example 1;

[0076] The emulsifier is the same as in Example 1;

[0077] The preparation method of the screen printing ink resin is the same as that of Example 1.

[0078] Experimental example

[0079] The properties of the water-based inks prepared in Examples 1-3 and Comparative Examples 1-3 were tested, wherein the viscosity, fineness and pH value were tested according to GB / T13217.4-2008, GB / T13217.3-2008 and QB / T 2825-2006 standards, respectively, wherein the viscosity was tested using Zahn 3# cup and Zahn 2# cup; the initial dryness was tested according to GB / T 13217.5-2008; the adhesion was tested according to GB / T 13217.7-2023; and the flexibility was tested according to GB / T 1731-2020; the test results are shown in the following table:

[0080]

[0081]

[0082] According to the test results of Example 1 and Comparative Example 1, the aliphatic polyurethane acrylate can significantly improve the flexibility of the ink resin; according to the test results of Example 1 and Comparative Example 2, the introduction of 1-amino-5-vinylnaphthalene monomer in the emulsifier improves the adhesion of the ink resin; according to the test results of Example 1 and Comparative Example 3, the emulsifier of the present invention can increase the curing reaction rate and also has a certain improvement effect on flexibility.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A screen printing ink resin, characterized in that: The composition comprises the following components by weight: 5-16 parts of acrylic acid monomer, 20-50 parts of acrylate monomer, 4-14 parts of aliphatic polyurethane acrylate, 0.1-1 parts of initiator, 2-8 parts of emulsifier, 10-50 parts of deionized water, and 0-2 parts of auxiliary agent; Wherein, the preparation method of the emulsifier comprises the following steps: Cis-9-octadeceneamine and 1-amino-5-vinylnaphthalene are weighed and dissolved in solvents to obtain a cis-9-octadeceneamine solution and a 1-amino-5-vinylnaphthalene solution; sodium benzaldehyde-2-sulfonate is weighed and dissolved in deionized water to obtain a sodium benzaldehyde-2-sulfonate solution; the cis-9-octadeceneamine solution and the 1-amino-5-vinylnaphthalene solution are slowly added to the sodium benzaldehyde-2-sulfonate solution at room temperature and under stirring conditions; sodium bromide is added after sufficient stirring and mixing; the pH of the mixed system is adjusted to alkaline; the stirring reaction is continued for 10-60 minutes; after the reaction is completed, the precipitate is separated by filtering; and the filtrate is concentrated under reduced pressure to obtain the emulsifier.

2. A screen printing ink resin according to claim 1, characterized in that: The acrylic acid ester monomer is one or more of methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, isooctyl acrylate, 4-hydroxybutyl acrylate, lauryl acrylate, octadecyl acrylate, octadecyl methacrylate, tripropylene glycol diacrylate, and trimethylolpropane triacrylate.

3. A screen printing ink resin according to claim 1, characterized in that: The initiator is one or more of 1-hydroxy-cyclohexyl-phenyl ketone, methyl o-benzoylbenzoate, 4-chlorobenzophenone, oligomeric multifunctional α-hydroxy ketone, and 2-hydroxy-2-methyl-1-phenyl-1-propanone.

4. A screen printing ink resin according to claim 1, characterized in that: The auxiliary agent is one or more of a dispersant, a leveling agent, a stabilizer, a softener, a preservative, a defoamer, a pH adjuster, an adhesion promoter, an antistatic agent, and a thickener.

5. A screen printing ink resin according to claim 1, characterized in that: The molar concentration of the cis-9-octadeceneamine solution is 0.01-0.1 mol / L, and the molar concentration of the 1-amino-5-vinylnaphthalene solution is 0.01-0.1 mol / L.

6. A screen printing ink resin according to claim 1, characterized in that: The molar concentration of the sodium benzaldehyde-2-sulfonate solution is 0.01-0.1 mol / L.

7. A screen printing ink resin according to claim 1, characterized in that: The molar ratio of the cis-9-octadeceneamine to the 1-amino-5-vinylnaphthalene, the sodium benzaldehyde-2-sulfonate, and the sodium bromide is 1:(1.8-2.5):(8-11):(0.01-0.05).

8. The screen printing ink resin according to claim 1, characterized in that: The pH of the mixed system is adjusted to 7.5-10.

9. The method for preparing a screen printing ink resin according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, weigh each raw material for use; S2. Place the deionized water and the emulsifier in a high-speed stirrer and stir and disperse for 1-60 minutes, add the remaining raw materials, continue stirring and dispersing for 1-60 minutes to obtain a slurry, transfer the dispersed slurry to a sand mill or a ball mill for grinding and dispersion until the desired dispersion fineness and concentration are reached, and then filter through a fine mesh screen to obtain a slurry.

10. Use of a screen printing ink resin according to any one of claims 1 to 8 on cigarette packages.

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