UV ink fountain matte varnish and preparation method thereof

Abstract

The invention relates to the field of matte ink, in particular to UV ink fountain matte varnish and a preparation method thereof. The DAPA resin is prepared from the following raw materials in percentage by weight: DAPA resin, a UV active diluting monomer, a photoinitiator, a functional monomer, a polymerization inhibitor, a matting material and the balance of a processing aid, the UV active diluting monomer is composed of one or more of triethylene glycol diacrylate, acryloyl morpholine and vinyl caprolactam; the functional monomer is composed of one or more of 15 (ethyoxyl) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate and 2, 2 '-diallyl bisphenol A, and the functional monomer is composed of one or more of 15 (ethyoxyl) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate and 2, 2'-diallyl bisphenol A; the matting material is composed of a hand feeling matting agent, wax powder and organic silicon bentonite according to the weight ratio of 18: (0.3-1.3): (3-5), and by compounding the raw materials, the wear resistance and matt effect of the matt varnish are enhanced.

Description

Technical Field

[0001] The present application relates to the field of matte ink, and more specifically, to a UV ink fountain matte oil and a preparation method thereof. Background Art

[0002] UV ink matte oil is a matte ink that uses ultraviolet (UV) curing technology and is widely used in packaging printing, label printing, commercial printing and other fields. The main feature of this ink is that it can form a matte effect on the surface of printed products, improving the visual texture and anti-counterfeiting performance of the product. With the growth of market demand and technological advancement, UV ink matte oil is continuously optimized in terms of formula design and application process to meet higher quality requirements and environmental protection standards. Usually, in order to form a snowflake-shaped ink pattern in the printed pattern, multiple layers of ink layers are required to cooperate to achieve it. In particular, for finer snowflake patterns, it is necessary to use primer, topcoat and matte oil for printing in sequence. After printing the primer and topcoat: the primer is first cured to form a primer layer, and then the topcoat is applied on the primer layer. When the topcoat is cured, it shrinks on the primer layer to form an uneven surface. When a layer of matte oil is applied on its surface, when the matte oil is cured, the matte oil layer is formed to cooperate with the topcoat layer. The uneven surface, thereby achieving the effect of fine snowflakes.

[0003] In order to achieve a better matte effect, a certain proportion of fillers, such as talcum powder, kaolin and barium sulfate, are usually added in the prior art. These fillers can not only increase the volume and weight of the ink, but also improve the matte effect and physical strength. However, although these traditional methods can improve the matte effect to a certain extent, there are still some problems in practical applications. In particular, the large amount of fillers used will lead to a decrease in the wear resistance of the ink, which limits its application in high-end printing products. Therefore, how to improve the wear resistance of the ink while maintaining a good matte effect has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] In order to present a better matte effect and obtain better wear resistance, the present application provides a UV ink matte oil and a preparation method thereof.

[0005] In the first aspect, the present application provides a UV ink fountain matte oil, which is composed of the following raw materials in percentage by weight: DAPA resin: 30-40% UV active diluent monomer: 30-40% Photoinitiator: 6-8% Functional monomer 3-5% Inhibitor: 0.02-0.05% Matting material 10-20% The balance is processing aids; The UV active diluent monomer is one or more of triethylene glycol diacrylate, acryloyl morpholine, and vinyl caprolactam; The functional monomer is one or more of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A; The matting material is composed of a hand-feel matting agent, wax powder and organic silicon bentonite in a weight ratio of 18: (0.3-1.3): (3-5).

[0006] By adopting the above technical solution, UV ink fountain matte oil has the following effects: Enhance wear resistance: The wax film formed by wax powder on the matt oil surface effectively prevents damage to the matt oil film caused by external friction, thus improving wear resistance. The thickening and dispersing effect of organosilicon bentonite makes the ingredients in the matt oil more uniform, reducing wear caused by uneven distribution of ingredients. The fine particles of the matting agent help disperse external forces and reduce wear.

[0007] Improve matting performance: The main function of matting agent is matting, and the presence of its fine particles also helps to disperse external forces and reduce wear. When matting agent, wax powder and organosilicon bentonite are used in combination, significant synergistic effects can be produced, giving matt oil better matting performance.

[0008] Improve thixotropy and emulsification degree: DAPA resin can control and adjust thixotropy and emulsification degree, thereby promoting uniform dispersion of matting agent, wax powder and silicone bentonite, and further improving wear resistance and matting performance.

[0009] Optimize curing efficiency and cross-linking density: The compounding of UV-active diluent monomers (such as triethylene glycol diacrylate, acryloyl morpholine, vinyl caprolactam) and functional monomers (such as 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, 2,2'-diallyl bisphenol A) allows these monomers to form a polymer network structure through copolymerization. Combined with the excellent properties of DAPA resin and matte filler, the varnish layer has better wear resistance and matte effect.

[0010] Achieving a stable and thin matt oil layer: The matt oil in the formula of the present application is easily applied to the surface of the top oil layer and adheres to form a stable matt oil layer. Compared with ordinary matt oil of the same thickness, the matt oil layer formed is thin, less in amount, and has good matte effect, adhesion stability and wear resistance.

[0011] Preferably, the hand-feel matting agent is an organic thermosetting polymethyl urea resin hand-feel matting agent.

[0012] By adopting the above technical solution, the matting agent is an organic thermosetting polymethylurea resin matting agent. The fine particles formed by this material on the matte oil surface not only effectively improve the matte effect, but also its unique chemical properties help to disperse external forces and reduce wear. This makes the matte oil layer finally formed have better wear resistance and better matte effect.

[0013] Preferably, the wax powder is composed of one or more of montan wax, western palm wax and PTFE micropowder.

[0014] By adopting the above technical scheme, one or more of montan wax, western palm wax, and PTFE micropowder are selected as wax powder. These materials can form a dense wax film on the surface of matt oil, effectively preventing damage to the matt oil film caused by external friction, and significantly improving the wear resistance of the coating.

[0015] Preferably, the wax powder is composed of montan wax, western palm wax and PTFE micropowder in a weight ratio of 1:(1.2-1.5):(1-2).

[0016] By adopting the above technical solution, the wax powder is composed of montan wax, western palm wax and PTFE micropowder in a specific weight ratio, which can form a uniform and dense wax film on the surface of the matt oil, effectively preventing the damage of the matt oil film by external friction and improving the wear resistance. At the same time, this combination optimizes the dispersibility and compatibility of the wax powder, and further enhances the stability and wear resistance of the wax powder in the matt oil.

[0017] Preferably, the UV active diluent monomer is composed of triethylene glycol diacrylate, acryloyl morpholine and vinyl caprolactam in a weight ratio of 1: (1-2.5): (0.1-1).

[0018] By adopting the above technical solution, the UV active diluent monomer is compounded with triethylene glycol diacrylate, acryloyl morpholine and vinyl caprolactam in a specific ratio, which can form a polymer network structure in the varnish layer, enhance the wear resistance and matte effect of the varnish layer. At the same time, the composition helps to improve the adhesion stability of the matt oil after curing, and ensures the uniform distribution and stable existence of the matt oil layer on the surface oil layer.

[0019] Preferably, the functional monomer is composed of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A in a weight ratio of 1: (0.1-2): (0.1-0.5).

[0020] By adopting the above technical solution, the specific proportion of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A is compounded to significantly improve the heat resistance and toughness of the varnish layer. At the same time, this compound combination can also improve the radiation curing efficiency and cross-linking density of the varnish layer, and further enhance the adhesion stability, matte effect and wear resistance of the matte oil layer formed after the matte oil is cured.

[0021] Preferably, the photoinitiator is one or more of BTA, BPO and EDC.

[0022] By adopting the above technical solution and selecting one or more of BTA, BPO and EDC as photoinitiators, the curing efficiency and crosslinking density of UV ink matt oil can be significantly improved, ensuring rapid curing under ultraviolet light to form a stable matt oil layer. At the same time, these photoinitiators have good compatibility and stability and will not affect the performance of other components, thereby ensuring the matte effect and wear resistance of the final product.

[0023] Preferably, the polymerization inhibitor is N-nitrosophenylhydroxylamine aluminum salt.

[0024] By adopting the above technical solution, N-nitrosophenylamine aluminum salt is used as an inhibitor to effectively inhibit the side reactions produced during the free radical polymerization process, ensure the stability of UV ink matte during storage and use, and avoid performance degradation caused by premature polymerization. At the same time, the addition of the inhibitor helps to improve the uniformity and wear resistance of the matte oil layer finally formed, further enhancing the comprehensive performance of the product.

[0025] Preferably, the processing aid is one or more of a leveling agent, a dispersant, and a colorant.

[0026] By adopting the above technical solution, the addition of leveling agent and / or dispersant improves the fluidity and uniformity of UV ink during coating, which helps to form a flatter and smoother coating surface. At the same time, these additives can effectively prevent the agglomeration and sedimentation of pigments and other solid components, ensuring that each component is evenly distributed in the coating, thereby improving the stability and performance of the final product.

[0027] In a second aspect, the present application provides an ink fountain matt oil, which is prepared by the following method: According to weight percentage, DAPA resin, UV active diluent monomer, photoinitiator, functional monomer, polymerization inhibitor, matting material and processing aid are weighed and mixed evenly to obtain UV ink matte oil.

[0028] By adopting the above technical scheme, the preparation method of the UV ink fountain matt oil is simple and efficient, and can ensure that each component is evenly mixed, thereby ensuring the quality of the final product. The reasonable ratio between DAPA resin, UV active diluting monomer, functional monomer, photoinitiator, inhibitor, matting material and processing aid makes the prepared matt oil have excellent wear resistance and matte effect. In particular, the compound use of hand matting agent, wax powder and organosilicon bentonite not only improves the matt performance of matt oil, but also enhances its wear resistance and stability. In addition, the matt oil layer thickness prepared by the method is thin and the amount is small, and it is easy to be coated on the surface of the surface oil layer, and a stable matt oil layer can be formed, which is suitable for various printing processes, and is particularly outstanding in forming fine snowflake-shaped patterns.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. By selecting a specific proportion of matting agent, wax powder and organosilicon bentonite as matting material, an effective protective film is formed, which improves the wear resistance of matt oil; 2. The compounding of DAPA resin with UV active diluent monomer and functional monomer promotes the uniform dispersion of each component and enhances the adhesion stability and matte effect of the matte oil layer; 3. The 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate and 2,2'-diallyl bisphenol A in the functional monomers work together to improve the heat resistance and toughness of the varnish layer, and further improve the overall performance of the matte oil. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with embodiments.

[0031] Some raw material description: N-Nitrosophenylhydroxylamine aluminum salt, CAS No. 15305-07-4; Dispersant EFKA-4510; Poly(diallyl phthalate) Japan Dacao DAP-A; Matting agent: Huber Pergopak M6; The montan wax is Tianshi wax powder PEW-0679F; The palm wax is Tianshi wax powder Twax-1601; PTFE powder is Twax-1505; Organic silicon bentonite Fenghong HFGEL-100F; The leveling agent is SHYT4450 produced by Jining Tangyi Chemical Co., Ltd. Example

[0032] Example 1 A UV ink fountain matte oil is prepared by the following method: According to the weight percentage of UV ink matte oil, 30% DAPA resin, 40% UV active diluent monomer, 8% photoinitiator, 5% functional monomer, 0.02% inhibitor, 10% matting material, and 6.98% processing aid were weighed and mixed evenly to obtain UV ink matte oil.

[0033] The matting material is composed of a hand-feel matting agent, wax powder and silicone bentonite in a weight ratio of 18:1:4.

[0034] The UV active diluent monomer is triethylene glycol diacrylate; the functional monomer is 15 (ethoxy) trimethylolpropane triacrylate; the hand-feel matting agent is an organic thermosetting polymethyl urea resin hand-feel matting agent; the wax powder is PTFE micropowder; the photoinitiator is BPO; the inhibitor is N-nitrosophenylamine aluminum salt; and the processing aid is composed of a leveling agent and a dispersant in a weight ratio of 1:1.

[0035] Example 2-3 The difference between Example 2-3 and Example 1 is that the amounts of raw materials used are different as shown in Table 1; Table 1 Raw material dosage of Examples 1-3 (%) raw material Example 1 Example 2 Example 3 DAPA 30 35 40 UV reactive diluent monomer 40 36 30 Photoinitiator 8 6 6 Functional monomer 5 4 3 Inhibitor 0.02 0.03 0.05 matting material 10 15 20 Processing Aids 6.98 3.97 0.95 Example 4 The difference between Example 4 and Example 2 is that the wax powder is western palm wax.

[0036] Example 5 The difference between Example 5 and Example 2 is that the wax powder is montan wax.

[0037] Example 6 The difference between Example 6 and Example 2 is that the wax powder is composed of palm wax and PTFE powder in a weight ratio of 1:3.

[0038] Example 7 The difference between Example 7 and Example 2 is that the wax powder is composed of montan wax, western palm wax and PTFE powder in a weight ratio of 1:1.2:1.

[0039] Example 8 The difference between Example 8 and Example 2 is that the wax powder is composed of montan wax, western palm wax and PTFE micropowder in a weight ratio of 1:1.5:2.

[0040] Example 9 The difference between Example 9 and Example 2 is that the UV active diluent monomer is acryloylmorpholine.

[0041] Example 10 The difference between Example 10 and Example 2 is that the UV active diluent monomer is vinyl caprolactam.

[0042] Embodiment 11 The difference between Example 11 and Example 2 is that the UV active diluent monomer is composed of triethylene glycol diacrylate, acryloyl morpholine, and vinyl caprolactam in a weight ratio of 1:1:0.1.

[0043] Example 12 The difference between Example 12 and Example 8 is that the UV active diluent monomer is composed of triethylene glycol diacrylate, acryloyl morpholine, and vinyl caprolactam in a weight ratio of 1:1:0.1.

[0044] Embodiment 13 The difference between Example 13 and Example 8 is that the UV active diluent monomer is composed of triethylene glycol diacrylate, acryloyl morpholine, and vinyl caprolactam in a weight ratio of 1:2.5:1.

[0045] Embodiment 14 The difference between Example 14 and Example 2 is that the functional monomer is propoxylated neopentyl glycol diacrylate.

[0046] Embodiment 15 The difference between Example 15 and Example 2 is that the functional monomer is 2,2'-diallyl bisphenol A.

[0047] Example 16 The difference between Example 16 and Example 2 is that the functional monomer is composed of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A in a weight ratio of 1:0.1:0.5.

[0048] Embodiment 17 The difference between Example 17 and Example 8 is that the functional monomer is composed of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A in a weight ratio of 1:2:0.5.

[0049] Embodiment 18 The difference between Example 18 and Example 13 is that the functional monomer is composed of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A in a weight ratio of 1:0.1:0.5.

[0050] Embodiment 19 The difference between Example 19 and Example 13 is that the functional monomer is composed of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A in a weight ratio of 1:2:0.1.

[0051] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the hand-feel matting agent is replaced by wax powder in equal amount.

[0052] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that an equal amount of organosilicon bentonite replaces the matting agent.

[0053] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the wax powder replaces the hand-feel matting agent in equal amount.

[0054] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that the matting material is wax powder.

[0055] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the functional monomer is replaced by an equal amount of UV active diluent monomer.

[0056] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that DAPA is replaced by an equal amount of functional monomers.

[0057] Performance testing The UV ink fountain matt oil obtained in Examples 1-19 and Comparative Examples 1-6 was used to produce an ink layer of a snowflake pattern through the following process, as follows: Primer (Guangdong Shanjin SJ-6440) was coated on the surface of the PET substrate and cured for 20 minutes to form a primer layer with a thickness of 10 microns. Top coat (Teflon 455G-91301, Chemours, USA) was coated on the surface of the primer layer. After curing, a top coat with a thickness of 10 microns was formed on the surface of the primer layer. UV ink fountain matte oil obtained in Examples 1-19 and Comparative Examples 1-6 was coated on the surface of the top coat and cured under a UV lamp for 1 minute at a power of 120 W / cm to form a matte oil layer with a thickness of 5 microns. After standing for 24 hours, the following performance tests were performed.

[0058] Test method / test method Gloss test According to the national standard GB / T 9754-2007, the glossiness of the printed material is tested at 60° using a reflectometer, and the index levels are as follows: matte <30.

[0059] Abrasion resistance: The falling sand test method is used for detection, and the test standard refers to GB / T5237-2008; observation is made every 5 minutes, and the time when the bottom is exposed (the time when the bottom oil layer, surface oil layer and matt oil layer are completely detached) is recorded.

[0060] The above implementation is specifically shown in Table 2; Table 2 Experimental data of Examples 1-19 and Comparative Examples 1-6 Combining Example 1 and Comparative Examples 1-4 and Table 2, it can be seen that the glossiness of Comparative Examples 1-4 is higher than that of Example 1, and the bottom penetration time is shorter than that of Example 1, indicating that the use of the raw materials of the present application, the matting agent, wax powder, and silicone bentonite for compounding has a synergistic effect, further improving the wear resistance and matte effect of the matt oil layer formed after the matt oil is cured.

[0061] Combining Example 1 and Comparative Examples 5-6 with Table 2, it can be seen that the glossiness of Comparative Examples 5-6 is higher than that of Example 1, and the bottom penetration time is shorter than that of Example 1, indicating that the use of the matte filler of the present application, combined with the functional monomer, UV active diluent monomer, and DAPA resin of the present application, has better wear resistance and matte effect.

[0062] By comparing Example 2, Example 7, Example 11, and Example 16, and combining with Table 2, it can be seen that the glossiness of Examples 7, 11, and 16 is lower than that of Example 2, and the bottom penetration time is greater than that of Example 2, indicating that the use of montan wax, western palm wax, and PTFE micropowder, triethylene glycol diacrylate, acryloyl morpholine, vinyl caprolactam, 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A all play a synergistic role to further improve the wear resistance and matte effect.

[0063] By comparing Example 13 with Example 8 and combining with Table 2, it can be seen that the glossiness of Example 13 is lower than that of Example 8, and the bottom penetration time is longer than that of Example 8, indicating that the use of montan wax, western palm wax, and PTFE micropowder compounded with triethylene glycol diacrylate, acryloyl morpholine, and vinyl caprolactam to obtain a UV active diluent monomer plays a synergistic role, further improving the wear resistance and matte effect of the matte oil layer formed after the matt oil is cured.

[0064] By comparing Example 18 with Example 13 and combining with Table 2, it can be seen that the glossiness of Example 18 is lower than that of Example 13, and the bottom penetration time is greater than that of Example 13, indicating that the use of montan wax, western palm wax, and PTFE micropowder compounded, and then combined with triethylene glycol diacrylate, acryloylmorpholine, and vinyl caprolactam to obtain a UV active dilution monomer, and then combined with 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, 2,2'-diallyl bisphenol A to obtain a functional monomer, plays a synergistic role, and further improves the high wear resistance and matte effect of the matte oil layer formed after the matte oil is cured.

[0065] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A UV ink matte oil, characterized in that: It is composed of the following raw materials in weight percentage: DAPA resin: 30-40% UV active diluent monomer: 30-40% Photoinitiator: 6-8% Functional monomer 3-5% Inhibitor: 0.02-0.05% Matting material 10-20% The balance is processing aids; The UV active diluent monomer is one or more of triethylene glycol diacrylate, acryloyl morpholine, and vinyl caprolactam; The functional monomer is one or more of 15 (ethoxy) trimethylolpropane triacrylate, propoxylated neopentyl glycol diacrylate, and 2,2'-diallyl bisphenol A; The matting material is composed of a hand-feel matting agent, wax powder and organic silicon bentonite in a weight ratio of 18: (0.3-1.3): (3-5).

2. The UV ink fountain matte oil according to claim 1, characterized in that: The hand-feel matting agent is an organic thermosetting polymethyl urea resin hand-feel matting agent.

3. The UV ink fountain matte oil according to claim 1, characterized in that: The wax powder is composed of one or more of montan wax, western palm wax and PTFE micropowder.

4. The UV ink fountain matte oil according to claim 3, characterized in that: The wax powder is composed of montan wax, western palm wax and PTFE micropowder in a weight ratio of 1:(1.2-1.5):(1-2).

5. The UV ink fountain matte oil according to claim 1, characterized in that: The UV active diluent monomer is composed of triethylene glycol diacrylate, acryloyl morpholine and vinyl caprolactam in a weight ratio of 1: (1-2.5): (0.1-1).

6. The UV ink fountain matte paint according to claim 1, characterized in that: The functional monomer is composed of 15 (ethoxy) trimethylol propane triacrylate, propoxylated neopentyl glycol diacrylate and 2,2'-diallyl bisphenol A in a weight ratio of 1: (0.1-2): (0.1-0.5).

7. The UV ink fountain matte oil according to claim 1, characterized in that: The photoinitiator is one or more of BTA, BPO and EDC.

8. The UV ink fountain matte oil according to claim 1, characterized in that: The polymerization inhibitor is N-nitrosophenylamine aluminum salt.

9. The UV ink fountain matte paint according to claim 1, characterized in that: The processing aid is composed of one or more of a leveling agent, a dispersant, and a colorant.

10. A UV ink matte paint as claimed in any one of claims 1 to 9, characterized in that: Prepared by the following method: According to weight percentage, DAPA resin, UV active diluent monomer, photoinitiator, functional monomer, polymerization inhibitor, matting material and processing aid are weighed and mixed evenly to obtain UV ink fountain matt oil.

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