Matt antioxidant black ink and preparation method thereof

Abstract

The invention relates to the technical field of primer, in particular to matte antioxidant black ink and a preparation method thereof.The matte antioxidant black ink is prepared from, by weight, 30-60 parts of self-extinction waterborne polyurethane resin, 0.3-0.4 part of defoaming agent, 4-10 parts of bio-based emulsified oil, 8-20 parts of waterborne black slurry, 1-2 parts of flatting agent, 0.2-0.5 part of pH regulator, 1-2 parts of antiwear agent, 0.2-0.5 part of preservative and 10-50 parts of deionized water. By optimizing the selection and matching of the raw materials in the system and controlling the addition amount, the gold stamping oxidation of the water-based acrylic resin is obviously improved, the comprehensive properties such as wear resistance, water resistance and weather resistance after film formation are excellent, the stability can be kept for a long time, and the actual application requirements can be better met.

Description

Technical Field

[0001] This invention relates to the field of primer technology, specifically to a matte antioxidant black ink and its preparation method. Background Technology

[0002] Metallic textures have become a trend in contemporary design and craftsmanship. Hot stamping, as a traditional technique, is finding increasingly widespread application and innovation in modern gift box printing. Hot stamping utilizes the principle of heat transfer to transfer an aluminum layer onto the substrate. Specifically, under certain temperature and pressure, the heat-fusible silicone resin release layer and adhesive layer melt, reducing the adhesive strength of the release layer and allowing the aluminum layer to peel off from the base film layer, thus adhering to the stamping material. Therefore, it is also called electroplated aluminum foil stamping. Electroplated aluminum foil is typically composed of multiple layers of materials. The base material is often PE (polyethylene), followed by a release coating, a color coating, a metallic coating (aluminized), and an adhesive coating. In the printing industry, it is commonly used to stamp electroplated aluminum foil onto paper, a process known as hot stamping. Hot stamping is a general term for a process and does not necessarily mean that the stamped surface is gold. Hot stamping paper materials come in many colors, including gold, silver, holographic gold, holographic silver, black, red, and green. Chinese patent (authorization announcement number CN115742618B) discloses a tactile film for hot stamping aluminum and its manufacturing process, which improves the hot stamping effect by introducing water-based tactile oil. However, existing water-based inks contain sulfur elements, especially water-based acrylic resins, which may contain sulfur-containing materials or be contaminated during the synthesis process, resulting in a large amount of sulfur elements, which can easily lead to oxidation of the hot stamping. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a matte, antioxidant black ink. By optimizing the selection and combination of raw materials in the system and controlling the amount added, it significantly improves the oxidation of hot stamping in water-based acrylic resins. Furthermore, the ink exhibits excellent comprehensive properties such as abrasion resistance, water resistance, and weather resistance after film formation, maintaining stability over a long period and better meeting practical application needs.

[0004] This invention provides a matte, antioxidant black ink, comprising the following components by weight: 30-60 parts of self-matting waterborne polyurethane resin, 0.3-0.4 parts of defoamer, 4-10 parts of bio-based emulsified oil, 8-20 parts of waterborne black paste, 1-2 parts of leveling agent, 0.2-0.5 parts of pH adjuster, 1-2 parts of anti-abrasion agent, 0.2-0.5 parts of preservative, and 10-50 parts of deionized water.

[0005] In one embodiment, the matte antioxidant black ink comprises, by weight, the following components: 50-55 parts of self-matting waterborne polyurethane resin, 0.3-0.4 parts of defoamer, 5-7 parts of bio-based emulsified oil, 10-15 parts of waterborne black paste, 1-2 parts of leveling agent, 0.2-0.5 parts of pH adjuster, 1-2 parts of anti-abrasion agent, 0.2-0.5 parts of preservative, and 20-25 parts of deionized water.

[0006] In one embodiment, the self-matting waterborne polyurethane resin is an aliphatic anionic type with a pH of 8.2-9.2 and a solid content of 30-40 wt%.

[0007] In one embodiment, the self-matting waterborne polyurethane resin has a viscosity of <800 mPa·s at 25°C.

[0008] In one embodiment, the self-matte waterborne polyurethane resin has a viscosity of <600 mPa·s at 25°C.

[0009] In one embodiment, the self-matting waterborne polyurethane resin is sourced from Zhaoqing Baozuolong Fine Chemical Co., Ltd.

[0010] In one embodiment, the defoamer includes a silicone defoamer.

[0011] In one embodiment, the silicone defoamer includes at least one of TEGO Foamex 8420 or TEGOFoamex 3062, and is derived from Evonik Chemicals.

[0012] In one embodiment, the pH adjuster comprises an organic amine.

[0013] In one embodiment, the organic amine includes 2-amino-2-methyl-1-propanol.

[0014] In one embodiment, the leveling agent comprises an acetylenic diol leveling agent.

[0015] In one embodiment, the acetylenol leveling agent includes SURFYNOL® 104 E, sourced from Evonik Chemicals.

[0016] In one embodiment, the anti-wear agent comprises polyethylene wax.

[0017] In one embodiment, the polyethylene wax is of at least one of ARTWAX-7110, ARTWAX-7100, ARTWAX-7125, or ARTWAX-7135.

[0018] In one embodiment, the preservative comprises a nano-silver solution.

[0019] In one embodiment, the particle size of the nano-silver solution is 5-30 nm.

[0020] In one embodiment, the nano-silver solution has a particle size of 20 nm, a concentration of 0.1 mg / mL, and is designated as AgP01, sourced from Nanjing Dongna Biotechnology Co., Ltd.

[0021] In one embodiment, the bio-based emulsified oil is designated as model 5077 and originates from Guangdong Jiajing Technology Co., Ltd.

[0022] In one embodiment, the water-based black paste is model PHH802 black paste, sourced from Guangdong Jiajing Technology Co., Ltd.

[0023] This invention introduces a self-matting waterborne polyurethane resin, along with bio-based emulsified oil and waterborne black paste into the black ink system. This results in a product with excellent matting effect while providing excellent leveling and resolubility for the ink layer. It avoids defects such as whitening in black ink, and while producing vibrant colors, it also prevents oxidation of hot stamping, thus meeting the requirements of high-speed waterborne ink printing without plate clogging.

[0024] Furthermore, by introducing specific bio-based emulsified oil and water-based black paste into the product system, it exhibits high compatibility with the matte water-based polyurethane resin in the system, achieving good emulsification and dispersion, while also having anti-foaming function, good printability and coating properties, good leveling effect, and no back-sticking upon rewinding, making it suitable for halftone printing.

[0025] Furthermore, by introducing 0.2-0.5 parts by weight of nano-silver solution, the present invention has good compatibility with the system, enabling the provided product to have a broad-spectrum, rapid, and efficient bactericidal and antifungal effect, and the antibacterial effect is long-lasting. This solves the problem of bacterial and fungal regeneration on printed materials during transportation, storage, and use. Moreover, it is safe, toxic, and has no drug resistance, making it very suitable for printing and packaging.

[0026] Another aspect of the present invention provides a method for preparing matte antioxidant black ink, comprising the following steps: adding self-matte waterborne polyurethane resin, waterborne black paste, defoamer, bio-based emulsified oil, leveling agent and 50-90wt% deionized water into a container, stirring and dispersing at 800-1200r / min for 5-10min, adding anti-abrasion agent, pH adjuster, preservative and the remaining deionized water, dispersing and filtering to obtain matte antioxidant black ink.

[0027] The black ink provided by this invention uses bio-based self-matting waterborne polyurethane resin and emulsified oil. No sulfur-containing raw materials are used in the synthesis process, and the production process is pollution-free and low in VOCs, which greatly reduces the sulfur content of the black ink, ensuring that hot stamping does not oxidize and meeting the requirements of bio-based materials.

[0028] Beneficial effects 1. This invention provides a matte anti-oxidation black ink. By optimizing the selection and combination of raw materials in the system and controlling the amount added, it significantly improves the oxidation of hot stamping in water-based acrylic resin. Moreover, after film formation, it has excellent comprehensive properties such as wear resistance, water resistance and weather resistance, and can maintain stability for a long time, better meeting the needs of practical applications.

[0029] 2. This invention introduces self-matting waterborne polyurethane resin, bio-based emulsified oil, and waterborne black paste into the black ink system, enabling the provided product to have excellent matting effect while providing excellent leveling and resolubility for the ink layer. This avoids defects such as whitening of black ink, and while producing bright colors, it also avoids oxidation of hot stamping, meeting the requirements of high-speed waterborne ink printing without plate clogging.

[0030] 3. This invention introduces specific bio-based emulsified oil and water-based black paste into the product system, which have high compatibility with the matte water-based polyurethane resin in the system, achieving good emulsification and dispersion, while also having anti-foaming function, good printability and coating properties, good leveling effect, and no back-sticking when rewinding, making it suitable for halftone printing.

[0031] 4. By introducing 0.2-0.5 parts by weight of nano silver solution, this invention has good compatibility with the system, enabling the provided product to have a broad-spectrum, rapid, and efficient bactericidal and antifungal effect, and the antibacterial effect is long-lasting. It solves the problem of bacterial and fungal regeneration on printed materials during transportation, storage, and use, and is safe, toxic, and has no drug resistance, making it very suitable for printing and packaging.

[0032] 5. The black ink provided by this invention uses bio-based self-matting waterborne polyurethane resin and emulsified oil. No sulfur-containing raw materials are used in the synthesis process, and the production process is pollution-free and low in VOCs, which greatly reduces the sulfur content of the black ink, ensuring that hot stamping does not oxidize and meeting the requirements of bio-based. Detailed Implementation

[0033] Examples 1-10 Embodiments 1-10 of the present invention provide a matte anti-oxidation black ink, the formulation of which is shown in Table 1 by weight.

[0034] Table 1

[0035] The formulation of the self-matte waterborne polyurethane resin is shown in Table 2.

[0036] Table 2

[0037] In another aspect, Examples 1-10 of the present invention provide a method for preparing matte antioxidant black ink, comprising the following steps: Add self-matte waterborne polyurethane resin, waterborne black ink, defoamer, bio-based emulsified oil, leveling agent and 70wt% deionized water to a container, stir and disperse at 1000r / min for 5min, add anti-wear agent, pH adjuster, preservative and the remaining deionized water, disperse and filter to obtain matte antioxidant black ink.

[0038] Performance testing The following tests were performed on the products provided in each embodiment, and the test results are shown in Table 3.

[0039] 1. Gloss, tested according to GB / T 13217.2-2009 Test method for gloss of liquid ink.

[0040] 2. Viscosity, tested according to GB / T 13217.4-2020 Ink Viscosity Test Method.

[0041] 3. Adhesion strength shall be tested in accordance with GB / T 13217.7-2023 Test Method for Ink Adhesion.

[0042] 4. Tinting strength, tested according to GB / T 13217.1-2020 Test Method for Color and Tinting Strength of Inks.

[0043] 5. Anti-blocking, tested according to GB / T 13217.8-2009 Test method for anti-blocking of liquid inks.

[0044] 6. Initial drying properties shall be tested in accordance with GB / T 13217.5-2023 Test Method for Drying of Inks.

[0045] 7. pH value, measured using a pH meter.

[0046] 8. VOCs (volatile organic compounds) content shall be determined in accordance with the standard YC / T 207-2014 Determination of solvent residues in tobacco paper by headspace-gas chromatography-mass spectrometry.

[0047] 9. Sulfur content test shall be conducted in accordance with GB / T 37907-2019 Determination of Sulfides and Cyanides in Reclaimed Water by Ion Chromatography.

[0048] 10. Hot stamping oxidation test, in accordance with "BB / T 0031-2023 Electroplated Aluminum Hot Stamping Foil".

[0049] Table 3

[0050] Analysis of the data in Table 3 shows that Examples 1-3 have better overall performance than Examples 4-10, with Example 1 providing the best overall performance.

Claims

1. A matte, oxidation-resistant black ink, characterized by, The matt antioxidant black ink comprises the following components by weight parts: 30-60 parts of self-extinction water-based polyurethane resin, 0.3-0.4 parts of defoaming agent, 4-10 parts of bio-based emulsified oil, 8-20 parts of water-based black paste, 1-2 parts of leveling agent, 0.2-0.5 parts of pH regulator, 1-2 parts of anti-wear agent, 0.2-0.5 parts of preservative, and 10-50 parts of deionized water.

2. The matte, antioxidant black ink of claim 1, wherein, The matt antioxidant black ink comprises the following components by weight parts: 30-60 parts of self-extinction water-based polyurethane resin, 0.3-0.4 parts of defoaming agent, 4-10 parts of bio-based emulsified oil, 8-20 parts of water-based black paste, 1-2 parts of leveling agent, 0.2-0.5 parts of pH regulator, 1-2 parts of anti-wear agent, 0.2-0.5 parts of preservative, and 10-50 parts of deionized water.

3. The matte, antioxidant black ink of claim 1, wherein, The self-extinction water-based polyurethane resin is aliphatic anionic, with a pH of 8.2-9.2 and a solid content of 30-40wt%.

4. The matte, antioxidant black ink of claim 1, wherein, The viscosity of the self-extinction water-based polyurethane resin at 25℃ is <800mPa·s.

5. The matte, antioxidant black ink of claim 1, wherein, The defoaming agent comprises a silicone defoaming agent.

6. The matte, antioxidant black ink of claim 5, wherein, The model of the silicone defoaming agent comprises at least one of TEGO Foamex 8420 or TEGO Foamex 3062.

7. The matte, antioxidant black ink of claim 1, wherein, The pH regulator comprises an organic amine.

8. The matte, antioxidant black ink of claim 1, wherein, The anti-wear agent comprises a polyethylene wax.

9. The matte, antioxidant black ink of claim 1, wherein, The preservative comprises a nano-silver solution with a particle size of 5-30nm.

10. A process for the preparation of a matte, antioxidant black ink according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: The self-extinction water-based polyurethane resin, water-based black paste, defoaming agent, bio-based emulsified oil, leveling agent, and 50-90wt% of deionized water are added to a container, stirred and dispersed at 800-1200r / min for 5-10min, the anti-wear agent, pH regulator, preservative, and the balance of deionized water are added, and the matt antioxidant black ink is obtained after dispersion and filtration.

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