High temperature resistant waterborne micro-crosslinking transfer coating

Abstract

This invention belongs to the field of packaging and printing materials, specifically relating to a high-temperature resistant water-based micro-crosslinked transfer coating. The raw materials for this high-temperature resistant water-based micro-crosslinked transfer coating consist of the following components: methacrylic acid, N-hydroxymethylacrylamide, butyl acrylate, methyl methacrylate, diallyl phthalate, 1,6-hexanediol diacrylate, tricyclodecanedimethylol diacrylate, trimethylolpropane triacrylate, di(trimethylolpropane)tetraacrylate, potassium persulfate, sodium bicarbonate, alkylphenol polyoxyethylene ether ammonium sulfate, nonylphenol polyoxyethylene ether, deionized water, ethanol, ammonia, wetting agent, defoamer, and film-forming agent. Its beneficial effects include a stable reaction process during the preparation of this high-temperature resistant water-based micro-crosslinked transfer coating, reducing the likelihood of slag formation or explosive polymerization; high gloss in the coating film; good adhesion to vacuum metallization; minimal fogging or whitening; high-temperature molding resistance up to 180℃; and easy peeling of PET film with a high yield.

Description

Technical Field

[0001] This invention belongs to the field of packaging and printing materials, specifically relating to a high-temperature resistant water-based micro-crosslinking transfer coating. Background Technology

[0002] Vacuum-metallized paper, due to its attractive appearance, low cost, and good anti-counterfeiting and biodegradability, is widely used in luxury goods, cosmetics, tobacco and alcohol, pharmaceuticals, fast-moving consumer goods, daily chemical products, and gifts to meet diverse packaging effect and quality requirements. The vacuum-metallized paper transfer process mainly includes coating, molding, vacuum metallization, adhesive transfer, and peeling. Water-based transfer coatings are an important raw material for the environmentally friendly and sustainable development of transfer-method vacuum-metallized paper production. However, water-based transfer metallizing coatings are less commonly used in production due to problems such as poor heat resistance, easy whitening of the coating film, tight peeling, and low yield of metallized paper. Nevertheless, low-VOC water-based transfer coatings represent a trend towards environmental sustainability. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a high-temperature resistant water-based micro-crosslinking transfer coating.

[0004] A high-temperature resistant waterborne micro-crosslinking transfer coating, characterized in that the raw materials are composed of the following components in the following mass percentages: 1-8 parts methacrylic acid, 1-5 parts N-hydroxymethylacrylamide, 30-55 parts butyl acrylate, 55-85 parts methyl methacrylate, 5-18 parts diallyl phthalate, 1-8 parts 1,6-hexanediol diacrylate, 0-3 parts tricyclodecanedimethylethanol diacrylate, 0-5 parts trimethylolpropane triacrylate, and di(trimethylolpropane)... Methylpropane tetraacrylate 0-3 parts, potassium persulfate 0.1-0.6 parts, sodium bicarbonate 0.1-0.3 parts, alkylphenol polyoxyethylene ether ammonium sulfate 0.5-1.3 parts, nonylphenol polyoxyethylene ether 0.8-1.6 parts, deionized water 180-290 parts, ethanol 130-180 parts, ammonia 3-6 parts, alcohol alkoxy compound wetting agent 0.1-0.5 parts, polyamide hyperbranched polymer defoamer 0.1-0.5 parts, carbitol film-forming agent 1-3 parts.

[0005] The diallyl phthalate and 1,6-hexanediol diacrylate are flexible micro-crosslinking functional monomers that can improve heat resistance and vacuum metallization adhesion strength.

[0006] The tricyclodecanediethanol diacrylate, trimethylolpropane triacrylate, and di(trimethylolpropane)tetraacrylate are rigid micro-crosslinked monomers. Because they can form a network structure polymer through emulsion polymerization, and the film is hard and brittle, the heat resistance and peelability of the coating film are improved.

[0007] A method for preparing a high-temperature resistant water-based micro-crosslinking transfer coating, characterized by comprising the following steps:

[0008] (1) Component A: 120-180 parts of deionized water, 0.5-1.3 parts of alkylphenol polyoxyethylene ether ammonium sulfate, 0.8-1.6 parts of nonylphenol polyoxyethylene ether, 1-8 parts of methacrylic acid, 1-5 parts of N-hydroxymethylacrylamide, 30-55 parts of butyl acrylate, 55-85 parts of methyl methacrylate, 5-18 parts of diallyl phthalate, 1-8 parts of 1,6-hexanediol diacrylate, and 0-3 parts of tricyclodecanediethanol diacrylate are stirred evenly and set aside.

[0009] (2) Component B: Dissolve 10-30 parts of deionized water and 0.1-0.6 parts of potassium persulfate in water and stir well. Set aside.

[0010] (3) Add 50-80 parts of deionized water and 0.1-0.3 parts of sodium bicarbonate to the reaction vessel and stir until homogeneous;

[0011] (4) Take 25-60 parts of component A and 5-15 parts of component B and add them to the reactor. Heat the reactor to 75±2℃.

[0012] After thoroughly mixing the remaining components A and B, add them to the constant pressure dropping funnel and set aside for later use.

[0013] (5) After the reaction has been going on for 30 minutes, the monomer mixture to be used in the constant pressure dropping funnel is added dropwise at a constant rate. The dropping time of 80% of the monomer mixture in the constant pressure dropping funnel is controlled at 2.5 hours, and the temperature in the reactor is controlled at 82±1℃.

[0014] (6) Add 0-5 parts of trimethylolpropane triacrylate and 0-3 parts of di(trimethylolpropane)tetraacrylate monomer to the remaining 20% ​​of the monomer mixture in the constant pressure dropping funnel, stir evenly, and complete the addition in 60 minutes. The temperature in the reaction vessel is controlled at 81-83℃.

[0015] (7) Continue to control the temperature of the reactor at 80-81℃ and keep it at that temperature for 60 minutes;

[0016] (8) Reduce the temperature of the reactor to 40°C, add 130-180 parts of ethanol, 3-6 parts of ammonia, 0.1-0.5 parts of wetting agent, 0.1-0.5 parts of polyamide hyperbranched polymer defoamer, and 1-3 parts of carbitol film-forming agent to the reactor, stir thoroughly and evenly, and then discharge the material to obtain the high-temperature resistant water-based micro-crosslinking transfer coating.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: the preparation process of this high-temperature resistant water-based micro-crosslinking transfer coating is stable and less prone to slag discharge or explosive polymerization. It can be mixed with water, ethanol, etc. in any proportion according to the coating application requirements. After coating and film formation, the coating film has few bubble points and can dry quickly at high temperatures. The coating film has high gloss, good adhesion to vacuum metallization and is not prone to fogging or whitening. It can withstand high-temperature molding up to 180°C. The PET film is easy to peel off and has a high yield. Moreover, it does not use solvents such as acetone and ethers, and its production and application process has low VOC emissions. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this application readily understandable, this application will be further described in detail below with reference to specific embodiments.

[0019] Example 1:

[0020] The high-temperature resistant water-based micro-crosslinked transfer coating in this example was prepared using the following method:

[0021] (1) Component A: 120 parts of deionized water, 0.5 parts of alkylphenol polyoxyethylene ether ammonium sulfate, 0.8 parts of nonylphenol polyoxyethylene ether, 3 parts of methacrylic acid, 2 parts of N-hydroxymethylacrylamide, 35 parts of butyl acrylate, 60 parts of methyl methacrylate, 5 parts of diallyl phthalate, and 2 parts of 1,6-hexanediol diacrylate are mixed evenly and set aside.

[0022] (2) Component B: Dissolve 30 parts of deionized water and 0.2 parts of potassium persulfate in water and stir well. Set aside.

[0023] (3) Add 50 parts of deionized water and 0.1 parts of sodium bicarbonate to the reaction vessel and stir until homogeneous;

[0024] (4) Take 25 parts of component A and 6 parts of component B and add them to the reactor. Heat the reactor to 75±2℃.

[0025] After thoroughly mixing the remaining components A and B, add them to the constant pressure dropping funnel and set aside for later use.

[0026] (5) After the reaction has been going on for 30 minutes, the monomer mixture to be used in the constant pressure dropping funnel is added dropwise at a constant rate. The dropping time of 80% of the monomer mixture in the constant pressure dropping funnel is controlled at 2.5 hours, and the temperature in the reactor is controlled at 82±1℃.

[0027] (6) Add 1 part of trimethylolpropane triacrylate monomer to the remaining 20% ​​of the monomer mixture in the constant pressure dropping funnel, stir evenly, and complete the addition in 60 minutes. The temperature in the reactor is controlled at 81-83℃.

[0028] (7) Continue to control the temperature of the reactor at 80-81℃ and keep it at that temperature for 60 minutes;

[0029] (8) Reduce the temperature of the reactor to 40°C, add 135 parts of ethanol, 3 parts of ammonia, 0.1 parts of alcohol alkoxy compound wetting agent, 0.1 parts of polyamide hyperbranched polymer defoamer, and 1 part of carbitol film-forming agent to the reactor, stir thoroughly and evenly, and then discharge the material to obtain the high-temperature resistant water-based micro-crosslinking transfer coating.

[0030] (9) Application test: The high-temperature water-based micro-crosslinking transfer coating film has high gloss, good adhesion to vacuum metallization, no whitening of the film, and does not stick to the board when molded at 180℃. The PET film can be completely peeled off.

[0031] Example 2:

[0032] The high-temperature resistant water-based micro-crosslinked transfer coating in this example was prepared using the following method:

[0033] (1) Component A: 160 parts of deionized water, 0.9 parts of alkylphenol polyoxyethylene ether ammonium sulfate, 1.1 parts of nonylphenol polyoxyethylene ether, 5 parts of methacrylic acid, 3 parts of N-hydroxymethylacrylamide, 48 parts of butyl acrylate, 75 parts of methyl methacrylate, 13 parts of diallyl phthalate, 4 parts of 1,6-hexanediol diacrylate, and 2 parts of tricyclodecanediethanol diacrylate are mixed evenly and set aside.

[0034] (2) Component B: Dissolve 20 parts of deionized water and 0.4 parts of potassium persulfate in water and stir well. Set aside.

[0035] (3) Add 70 parts of deionized water and 0.2 parts of sodium bicarbonate to the reaction vessel and stir until homogeneous;

[0036] (4) Take 50 parts of component A and 11 parts of component B and add them to the reactor. Heat the reactor to 75±2℃.

[0037] After thoroughly mixing the remaining components A and B, add them to the constant pressure dropping funnel and set aside for later use.

[0038] (5) After the reaction has been going on for 30 minutes, the monomer mixture to be used in the constant pressure dropping funnel is added dropwise at a constant rate. The dropping time of 80% of the monomer mixture in the constant pressure dropping funnel is controlled at 2.5 hours, and the temperature in the reactor is controlled at 82±1℃.

[0039] (6) Add 3 parts of trimethylolpropane triacrylate and 1 part of di(trimethylolpropane)tetraacrylate monomer to the remaining 20% ​​of the monomer mixture in the constant pressure dropping funnel, stir evenly, and complete the addition in 60 minutes. The temperature in the reactor is controlled at 81-83℃.

[0040] (7) Continue to control the temperature of the reactor at 80-81℃ and keep it at that temperature for 60 minutes;

[0041] (8) Reduce the temperature of the reactor to 40°C, add 170 parts of ethanol, 5 parts of ammonia, 0.3 parts of alcohol alkoxy compound wetting agent, 0.3 parts of polyamide hyperbranched polymer defoamer, and 2 parts of carbitol film-forming agent to the reactor, stir thoroughly and evenly, and then discharge the material to obtain the high-temperature resistant water-based micro-crosslinking transfer coating.

[0042] (9) Application test: The high-temperature water-based micro-crosslinking transfer coating film has high gloss, good adhesion to vacuum metallization, no fogging or whitening of the film, and does not stick to the board or change color when molded at 180℃. The PET film can be completely peeled off.

[0043] Example 3:

[0044] The high-temperature resistant water-based micro-crosslinked transfer coating in this example was prepared using the following method:

[0045] (1) Component A: 180 parts of deionized water, 1.3 parts of alkylphenol polyoxyethylene ether ammonium sulfate, 1.6 parts of nonylphenol polyoxyethylene ether, 8 parts of methacrylic acid, 5 parts of N-hydroxymethylacrylamide, 55 parts of butyl acrylate, 85 parts of methyl methacrylate, 18 parts of diallyl phthalate, 8 parts of 1,6-hexanediol diacrylate, and 3 parts of tricyclodecane dimethyl diacrylate are mixed evenly and set aside.

[0046] (2) Component B: Dissolve 10 parts of deionized water and 0.6 parts of potassium persulfate in water and stir well. Set aside.

[0047] (3) Add 80 parts of deionized water and 0.3 parts of sodium bicarbonate to the reaction vessel and stir until homogeneous;

[0048] (4) Take 60 parts of component A and 15 parts of component B and add them to the reactor. Heat the reactor to 75±2℃.

[0049] After thoroughly mixing the remaining components A and B, add them to the constant pressure dropping funnel and set aside for later use.

[0050] (5) After the reaction has been going on for 30 minutes, the monomer mixture to be used in the constant pressure dropping funnel is added dropwise at a constant rate. The dropping time of 80% of the monomer mixture in the constant pressure dropping funnel is controlled at 2.5 hours, and the temperature in the reactor is controlled at 82±1℃.

[0051] (6) Add 5 parts of trimethylolpropane triacrylate and 3 parts of di(trimethylolpropane)tetraacrylate monomer to the remaining 20% ​​of the monomer mixture in the constant pressure dropping funnel, stir evenly, and complete the addition in 60 minutes. The temperature in the reaction vessel is controlled at 82±1℃.

[0052] (7) Continue to control the temperature of the reactor at 80-81℃ and keep it at that temperature for 60 minutes;

[0053] (8) Reduce the temperature of the reactor to 40°C, add 180 parts of ethanol, 6 parts of ammonia, 0.5 parts of alcohol alkoxy compound wetting agent, 0.5 parts of polyamide hyperbranched polymer defoamer, and 3 parts of carbitol film-forming agent to the reactor, stir thoroughly and evenly, and then discharge the material to obtain the high-temperature resistant water-based micro-crosslinking transfer coating.

[0054] (9) Application test: The high-temperature water-based micro-crosslinking transfer coating film has high gloss, good adhesion to vacuum metallization, no fogging or whitening of the film, and does not melt or change color when molded at 180℃. The PET film can be completely peeled off.

Claims

1. A high-temperature resistant water-based micro-crosslinking transfer coating, characterized in that, The raw materials of the coating are composed of the following components in the following mass percentages: 1-8 parts methacrylic acid, 1-5 parts N-hydroxymethylacrylamide, 30-55 parts butyl acrylate, 55-85 parts methyl methacrylate, 5-18 parts diallyl phthalate, 1-8 parts 1,6-hexanediol diacrylate, 2-3 parts tricyclodecanedimethylethanol diacrylate, 1-5 parts trimethylolpropane triacrylate, and bis(trimethylolpropane)tetrapropylene. 1-3 parts of ester, 0.1-0.6 parts of potassium persulfate, 0.1-0.3 parts of sodium bicarbonate, 0.5-1.3 parts of alkylphenol polyoxyethylene ether ammonium sulfate, 0.8-1.6 parts of nonylphenol polyoxyethylene ether, 180-290 parts of deionized water, 130-180 parts of ethanol, 3-6 parts of ammonia, 0.1-0.5 parts of alcohol alkoxy compound wetting agent, 0.1-0.5 parts of polyamide hyperbranched polymer defoamer, and 1-3 parts of carbitol film-forming agent; The high-temperature resistant water-based micro-crosslinking transfer coating is prepared by the following steps: (1) Component A: Mix 120-180 parts of deionized water, alkylphenol polyoxyethylene ether ammonium sulfate, nonylphenol polyoxyethylene ether, methacrylic acid, N-hydroxymethylacrylamide, butyl acrylate, methyl methacrylate, diallyl phthalate, 1,6-hexanediol diacrylate and tricyclodecane dimethyl diacrylate evenly and set aside. (2) Component B: Dissolve 10-30 parts of deionized water and potassium persulfate in water and stir well for later use; (3) Add 50-80 parts of deionized water and sodium bicarbonate to the reaction vessel and stir until homogeneous; (4) Take 25-60 parts of component A and 5-15 parts of component B and add them to the reactor. Heat the reactor to 75±2℃. Stir the remaining components A and B evenly and add them to the constant pressure dropping funnel for later use. (5) After the reaction has been going on for 30 minutes, the monomer mixture to be used in the constant pressure dropping funnel is added dropwise at a constant rate. The dropping time of 80% of the monomer mixture in the constant pressure dropping funnel is controlled at 2.5 hours, and the temperature in the reactor is controlled at 82±1℃. (6) Add the trimethylolpropane triacrylate and di(trimethylolpropane)tetraacrylate monomers to the remaining 20% ​​of the monomer mixture in the constant pressure dropping funnel, stir evenly, and complete the addition in 60 minutes. The temperature in the reactor is controlled at 81-83℃. (7) Continue to control the temperature of the reactor at 80-81℃ and keep it at that temperature for 60 minutes; (8) Reduce the temperature of the reactor to 40°C, add ethanol, ammonia, alcohol alkoxy compound wetting agent, polyamide hyperbranched polymer defoamer, carbitol film-forming agent to the reactor, stir thoroughly and evenly, and then discharge the material to obtain the high-temperature resistant water-based micro-crosslinking transfer coating.