Common electrochemical aluminum stamping foil water-based release agent and preparation method thereof

Abstract

The present application provides a kind of ordinary electrochemical aluminum stamping foil water-based release agent and its preparation method.The water-based release agent includes the following weight parts of raw materials: water-based polyurethane emulsion 50-60 parts, water-based acrylic modified polyurethane emulsion 25-35 parts, silane coupling agent 2-8 parts, filler 2-6 parts, wax emulsion 2-5 parts, fluorosilicon auxiliary agent 2-7 parts, polyethylene glycol 1-3 parts and crosslinking agent 1-3 parts.The water-based release agent has good chemical solvent resistance, temperature resistance, is suitable for the peeling strength and printing adaptability requirements of ordinary electrochemical aluminum stamping foil first stamping then printing process to release agent, is environment-friendly.The preparation method of the water-based release agent is simple and easy to control, process is stable, production is efficient, is conducive to large-scale production.

Description

Technical Field

[0001] This invention relates to the field of electroplated aluminum technology, specifically to a water-based release agent for ordinary electroplated aluminum hot stamping foil and its preparation method. Background Technology

[0002] Electroplated aluminum hot stamping foil is a hot stamping material made by coating a thin film substrate with a coating and vacuum evaporating a metal layer. Electroplated aluminum hot stamping foil generally consists of a base film, a release layer, a color layer (information layer), a metallized layer, and an adhesive layer. Its manufacturing process typically involves coating the base film with a release layer and a color layer, vacuum metallizing, then coating with an adhesive layer, and finally rewinding the finished product. Electroplated aluminum hot stamping foil generally features high gloss, high strength, and high toughness, with a smooth, fine surface and excellent processing performance and printability. It is widely used in packaging, printing, anti-counterfeiting, leather, home appliances, building materials, and other fields. Depending on the application scenario and processing technology, electroplated aluminum hot stamping foil is divided into laser electroplated aluminum, ordinary electroplated aluminum, and full-transfer electroplated aluminum, among others. Ordinary electroplated aluminum has a lower cost and a huge market demand, and is widely used in packaging printing, building materials, handicrafts, and daily chemical products. As a crucial component of electroplated aluminum hot stamping foil, the release layer isolates the color layer from the base film. After hot stamping, it allows the color layer, aluminum plating layer, and adhesive layer to quickly detach from the base film and be transferred and bonded to the surface of the object being hot-stamped. Furthermore, post-hot stamping printing often requires additional printing on the color layer surface. Therefore, the performance of the release agent directly impacts the quality and production efficiency of the subsequent printed products. However, existing release agent materials for electroplated aluminum hot stamping foil suffer from insufficient high-temperature resistance and chemical stability, and the release force can easily become too high or too low, making it difficult to fully meet the performance requirements of the hot stamping-before-printing process, necessitating further improvement. Additionally, due to cost and environmental considerations for ordinary electroplated aluminum foil, research is also needed on water-based release agents. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a water-based release agent for ordinary electroplated aluminum hot stamping foil. This water-based release agent exhibits excellent resistance to chemical solvents, is suitable for applications requiring peel strength and temperature resistance in the pre-hot stamping and post-printing process of ordinary electroplated aluminum foil, is environmentally friendly, and has a low cost. Furthermore, the preparation method of this water-based release agent for ordinary electroplated aluminum hot stamping foil is simple and easy to control, the process is stable, and production is highly efficient, which is conducive to large-scale production.

[0004] The objective of this invention is achieved through the following technical solution: a water-based release agent for ordinary electroplated aluminum hot stamping foil, comprising the following raw materials in parts by weight: 50-60 parts of water-based polyurethane emulsion, 25-35 parts of water-based acrylic modified polyurethane emulsion, 2-8 parts of silane coupling agent, 2-6 parts of filler, 2-5 parts of wax emulsion, 2-7 parts of fluorosilicone additive, 1-3 parts of polyethylene glycol, and 1-3 parts of crosslinking agent.

[0005] Furthermore, the silane coupling agent is at least one of silane coupling agents KH550 and KH560.

[0006] Furthermore, the filler is at least one of nano-silica, nano-alumina, nano-calcium carbonate, and nano-montmorillonite.

[0007] Furthermore, the fluorosilicone additive is a fluorinated polyether polysiloxane.

[0008] Furthermore, the wax emulsion is at least one of polyethylene wax emulsion, polypropylene wax emulsion, silicone wax emulsion, and polyamide wax emulsion.

[0009] Furthermore, the crosslinking agent is at least one of carbodiimide and trimethylolpropane triglycidyl ether.

[0010] Furthermore, the preparation method of the waterborne acrylic-modified polyurethane emulsion includes the following steps:

[0011] (S1) Under a nitrogen atmosphere, add 20-25 parts by weight of isophorone diisocyanate (IPDI), 15-20 parts by weight of poly(1,4-butanediol adipate), 15-20 parts by weight of polycarbonate diol, 10-15 parts by weight of polytetrahydrofuran ether diol and 4-8 parts by weight of trimethylolpropane into a reaction vessel, place it in a water bath at 75-80℃ and keep it warm and stir evenly for 30-60 minutes;

[0012] (S2) Add 2-3 parts of organic bismuth catalyst to the reaction vessel and react for 30-60 min. Add 2-5 parts of dimethylolpropionic acid and 10-16 parts of acrylic acid monomer mixture and react for 3-5 h.

[0013] (S3) Add 0.5-2 parts of 1,4-butanediol and 5-8 parts of the acrylic monomer mixture to the flask and react for 1 hour;

[0014] (S4) Add 2-5 parts of hydroxyethyl methacrylate and 5-8 parts of acrylic monomer mixture to the reaction vessel and react for 1.5-2.5 h; then lower the temperature to 40-50℃, add dimethylethanolamine to adjust the pH to 7.8-8.3, and then add 5-8 parts of acrylate monomer mixture and continue the reaction for 20-40 min.

[0015] (S5) Raise the system temperature to 75-85℃, add an initiator aqueous solution, such that the amount of initiator added is 0.5-1.5 parts, keep warm for 3-5 hours, and obtain waterborne acrylic modified polyurethane emulsion.

[0016] Furthermore, the initiator solution is at least one of ammonium persulfate and sodium bisulfite.

[0017] Furthermore, the initiator solution has a mass fraction of 15-25%, and the initiator is composed of ammonium persulfate and sodium bisulfite in a weight ratio of 2-4:1.

[0018] Furthermore, each part of the acrylic monomer mixture comprises the following parts by weight of raw materials: 10-15 parts of isooctyl acrylate, 10-15 parts of methyl methacrylate, and 5-10 parts of ethyl acrylate.

[0019] The present invention also provides a method for preparing the above-mentioned water-based release agent for ordinary electroplated aluminum hot stamping foil, comprising the following steps:

[0020] (1) Add silane coupling agent and filler in proportion, then add acetic acid dropwise to adjust pH to 4.5-5.5, heat to 50-55℃, stir and mix evenly to obtain material A;

[0021] (2) Mix the waterborne polyurethane emulsion, waterborne acrylic modified polyurethane emulsion and material A evenly, stir at 50-55℃ for 30-60 minutes, then add fluorosilicone additives and wax emulsion, and stir at 800-1200 rpm to obtain material B.

[0022] (3) Add polyethylene glycol and aziridine crosslinking agent to material B, add 2-amino-2-methyl-1-propanol to adjust the pH to 7.8-8.3, react at 60-65℃ for 2-3 hours and then filter, adjust the solid content to 20-30% to obtain water-based release agent for ordinary electroplated aluminum foil.

[0023] The beneficial effects of this invention are as follows: By compounding waterborne polyurethane emulsion (PUD) and waterborne acrylic-modified polyurethane emulsion (PUA), this invention utilizes the flexibility and high tensile strength of waterborne PUD and the high toughness and cohesive strength of waterborne PUA to improve the slitting and printing clarity of electroplated aluminum hot stamping foil. The synergistic effect of the main resin emulsion with silane coupling agents, fluorosilicone additives, wax emulsions, and fillers ensures moderate film-breaking force of the hot stamping foil, improving the temperature resistance of the release layer and its post-printing suitability. Furthermore, this waterborne release agent exhibits good chemical solvent resistance, low cost, superior overall performance, and is environmentally friendly. The preparation method of this ordinary electroplated aluminum hot stamping foil waterborne release agent is simple and easy to control, with stable processes, high production efficiency, and is conducive to large-scale production. Detailed Implementation

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments. The content mentioned in the embodiments is not intended to limit the present invention.

[0025] In some embodiments of the present invention, a water-based release agent for ordinary electroplated aluminum hot stamping foil comprises the following raw materials in parts by weight: 50-60 parts of water-based polyurethane emulsion, 25-35 parts of water-based acrylic modified polyurethane emulsion, 2-8 parts of silane coupling agent, 2-6 parts of filler, 2-5 parts of wax emulsion, 2-7 parts of fluorosilicone additive, 1-3 parts of polyethylene glycol, and 1-3 parts of crosslinking agent.

[0026] In some embodiments of the present invention, the silane coupling agent is at least one of silane coupling agents KH550 and KH560.

[0027] In some embodiments of the present invention, the silane coupling agent is composed of silane coupling agents KH550 and KH560 in a weight ratio of 1-4:1.

[0028] In some embodiments of the present invention, the filler is at least one of nano-silica, nano-alumina, nano-calcium carbonate, and nano-montmorillonite.

[0029] In some embodiments of the present invention, the fluorosilicone additive is a fluorinated polyether polysiloxane.

[0030] In some embodiments of the present invention, the wax emulsion is at least one of polyethylene wax emulsion, polypropylene wax emulsion, silicone wax emulsion, and polyamide wax emulsion.

[0031] In some embodiments of the present invention, the crosslinking agent is at least one of carbodiimide and trimethylolpropane triglycidyl ether.

[0032] In some embodiments of the present invention, the preparation method of the waterborne acrylic-modified polyurethane emulsion includes the following steps:

[0033] (S1) Under a nitrogen atmosphere, add 20-25 parts by weight of isophorone diisocyanate (IPDI), 15-20 parts by weight of poly(1,4-butanediol adipate), 15-20 parts by weight of polycarbonate diol, 10-15 parts by weight of polytetrahydrofuran ether diol, and 4-8 parts by weight of trimethylolpropane into a reaction vessel, place it in a water bath at 75-80℃ and keep it warm and stir evenly for 30-60 minutes;

[0034] (S2) Add 2-3 parts of organic bismuth catalyst to the reaction vessel and react for 30-60 min. Add 2-5 parts of dimethylolpropionic acid and 10-16 parts of acrylic acid monomer mixture and react for 3-5 h.

[0035] (S3) Add 0.5-2 parts of 1,4-butanediol and 5-8 parts of the acrylic monomer mixture to the flask and react for 1 hour;

[0036] (S4) Add 2-5 parts of hydroxyethyl methacrylate and 5-8 parts of acrylic monomer mixture to the reaction vessel and react for 1.5-2.5 h; then lower the temperature to 40-50℃, add dimethylethanolamine to adjust the pH to 7.8-8.3, and then add 5-8 parts of acrylate monomer mixture and continue the reaction for 20-40 min.

[0037] (S5) Raise the system temperature to 75-85℃, add an initiator aqueous solution, such that the amount of initiator added is 0.5-1.5 parts, keep warm for 3-5 hours, and obtain waterborne acrylic modified polyurethane emulsion.

[0038] In some embodiments of the present invention, the initiator solution is at least one of ammonium persulfate and sodium bisulfite.

[0039] In some embodiments of the present invention, the initiator solution has a mass fraction of 15-25%, and the initiator is composed of ammonium persulfate and sodium bisulfite in a weight ratio of 2-4:1.

[0040] In some embodiments of the present invention, each part of the acrylic monomer mixture comprises the following parts by weight of raw materials: 10-15 parts of isooctyl acrylate, 10-15 parts of methyl methacrylate, and 5-10 parts of ethyl acrylate.

[0041] In some embodiments of the present invention, the preparation method of water-based release agent for ordinary electroplated aluminum hot stamping foil includes the following steps:

[0042] (1) Add silane coupling agent and filler in proportion, then add acetic acid dropwise to adjust pH to 4.5-5.5, heat to 50-55℃, stir and mix evenly to obtain material A;

[0043] (2) Mix the waterborne polyurethane emulsion, waterborne acrylic modified polyurethane emulsion and material A evenly, stir at 50-55℃ for 30-60 minutes, then add fluorosilicone additives and wax emulsion, and stir at 800-1200 rpm to obtain material B.

[0044] (3) Add polyethylene glycol and aziridine crosslinking agent to material B, add 2-amino-2-methyl-1-propanol to adjust the pH to 7.8-8.3, react at 60-65℃ for 2-3 hours and then filter, adjust the solid content to 20-30% to obtain water-based release agent for ordinary electroplated aluminum foil.

[0045] Example 1

[0046] In this embodiment, a common electroplated aluminum hot stamping foil water-based release agent comprises the following raw materials in parts by weight: 55 parts water-based polyurethane emulsion, 30 parts water-based acrylic modified polyurethane emulsion, 4 parts silane coupling agent, 5 parts filler, 3 parts wax emulsion, 4 parts fluorosilicone additive, 2 parts polyethylene glycol, and 2 parts crosslinking agent.

[0047] Furthermore, the silane coupling agent is composed of silane coupling agents KH550 and KH560 in a weight ratio of 2:1.

[0048] Furthermore, the filler is composed of nano-silica, nano-alumina, and nano-montmorillonite in a weight ratio of 1.5:1.5:1. The fluorosilicone additive is Guangzhou Kanglunxi Chemical KX-101 fluoromodified polyether polysiloxane. The wax emulsion is polyethylene wax emulsion BYK513.

[0049] Furthermore, the crosslinking agent is carbodiimide. The polyethylene glycol is PEG-6000.

[0050] Furthermore, the preparation method of the waterborne acrylic-modified polyurethane emulsion includes the following steps:

[0051] (S1) Under a nitrogen atmosphere, 24 parts by weight of isophorone diisocyanate, 18 parts by weight of poly(1,4-butanediol adipate), 18 parts by weight of polycarbonate diol, 12 parts by weight of polytetrahydrofuran ether diol, and 6 parts by weight of trimethylolpropane were added to a reaction vessel, placed in a 75°C water bath and stirred until homogeneous for 40 min.

[0052] (S2) Add 2.5 parts of organic bismuth catalyst to the reaction vessel, react for 30 min, then add 3 parts of dimethylolpropionic acid and 12 parts of acrylic acid monomer mixture, and react for 4 h; the organic bismuth catalyst is bismuth neodecanoate;

[0053] (S3) Add 1 part of 1,4-butanediol and 6 parts of acrylic acid monomer mixture to the flask and react for 1 hour.

[0054] (S4) Add 3 parts of hydroxyethyl methacrylate and 6 parts of acrylic monomer mixture to the reaction vessel and react for 2 hours; then lower the temperature to 45°C, add dimethylethanolamine to adjust the pH to 8.0, and then add 6 parts of acrylate monomer mixture and continue the reaction for 30 minutes.

[0055] (S5) Raise the system temperature to 80℃, add an initiator aqueous solution so that the amount of initiator added is 1 part, keep warm for 4 hours, and obtain waterborne acrylic modified polyurethane emulsion.

[0056] In this embodiment, isophorone diisocyanate was produced by Wanhua Chemical. The molecular weight of poly(1,4-butanediol adipate) diol is 1000, and the product used is Jining Tangyi Chemical's poly(1,4-butanediol adipate) diol HY-1022. The molecular weight of polytetrahydrofuran ether diol is 3000, and the product used is BASF PTMEG 3000. The molecular weight of polycarbonate diol is 2000, and the product used is Wuhan Huaxiang Kejie's polycarbonate diol PCDL 29862-10-0.

[0057] Furthermore, the initiator solution has a mass fraction of 20%, and the initiator is composed of ammonium persulfate and sodium bisulfite in a weight ratio of 3:1.

[0058] Furthermore, each portion of the acrylic monomer mixture comprises the following parts by weight of raw materials: 12 parts of isooctyl acrylate, 12 parts of methyl methacrylate, and 6 parts of ethyl acrylate.

[0059] In this embodiment, the preparation method of the above-mentioned water-based release agent for ordinary electroplated aluminum hot stamping foil includes the following steps:

[0060] (1) Add silane coupling agent and filler in proportion, then add acetic acid dropwise to adjust pH to 5, heat to 52℃, stir and mix evenly to obtain material A;

[0061] (2) Mix the waterborne polyurethane emulsion, waterborne acrylic modified polyurethane emulsion and material A evenly, stir at 52°C for 40 min, then add fluorosilicone additives and wax emulsion, stir at 1000 rpm for 40 min to obtain material B.

[0062] (3) Add polyethylene glycol and aziridine crosslinking agent to material B, add 2-amino-2-methyl-1-propanol to adjust the pH to 8.0, react at 62℃ for 2.5h and then filter, adjust the solid content to 25% to obtain water-based release agent for ordinary electroplated aluminum foil.

[0063] Example 2

[0064] In this embodiment, a common electroplated aluminum hot stamping foil water-based release agent comprises the following raw materials in parts by weight: 50 parts of water-based polyurethane emulsion, 34 parts of water-based acrylic modified polyurethane emulsion, 5 parts of silane coupling agent, 5 parts of filler, 3 parts of wax emulsion, 4 parts of fluorosilicone additive, 2 parts of polyethylene glycol, and 2 parts of crosslinking agent.

[0065] Furthermore, the silane coupling agent is composed of silane coupling agents KH550 and KH560 in a weight ratio of 2:1.

[0066] Furthermore, the filler is composed of nano-silica, nano-alumina and nano-montmorillonite in a weight ratio of 1.5:1.5:1.

[0067] Furthermore, the fluorosilicone additive is a fluorinated polyether polysiloxane. The wax emulsion is a polyethylene wax emulsion.

[0068] Furthermore, the crosslinking agent is carbodiimide. The polyethylene glycol is PEG-6000.

[0069] In this embodiment, the preparation method of the above-mentioned water-based release agent for ordinary electroplated aluminum hot stamping foil includes the following steps:

[0070] (1) Add silane coupling agent and filler in proportion, then add acetic acid dropwise to adjust pH to 5, heat to 52℃, stir and mix evenly to obtain material A;

[0071] (2) Mix the waterborne polyurethane emulsion, waterborne acrylic modified polyurethane emulsion and material A evenly, stir at 52°C for 40 min, then add fluorosilicone additives and wax emulsion, stir at 1000 rpm for 40 min to obtain material B.

[0072] (3) Add polyethylene glycol and aziridine crosslinking agent to material B, add 2-amino-2-methyl-1-propanol to adjust the pH to 8.0, react at 62℃ for 2.5h and then filter, adjust the solid content to 25% to obtain water-based release agent for ordinary electroplated aluminum foil.

[0073] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0074] Example 3

[0075] In this embodiment, a common electroplated aluminum hot stamping foil water-based release agent comprises the following raw materials in parts by weight: 60 parts of water-based polyurethane emulsion, 25 parts of water-based acrylic modified polyurethane emulsion, 3 parts of silane coupling agent, 5 parts of filler, 3 parts of wax emulsion, 5 parts of fluorosilicone additive, 2 parts of polyethylene glycol, and 2 parts of crosslinking agent.

[0076] Furthermore, the silane coupling agent is composed of silane coupling agents KH550 and KH560 in a weight ratio of 3:1.

[0077] Furthermore, the filler is composed of nano-silica, nano-alumina and nano-montmorillonite in a weight ratio of 1:1:1.

[0078] Furthermore, the fluorosilicone additive is a fluorinated polyether polysiloxane. The wax emulsion is a polyethylene wax emulsion.

[0079] Furthermore, the crosslinking agent is carbodiimide. The polyethylene glycol is PEG-6000.

[0080] In this embodiment, the preparation method of the above-mentioned water-based release agent for ordinary electroplated aluminum hot stamping foil includes the following steps:

[0081] (1) Add silane coupling agent and filler in proportion, then add acetic acid dropwise to adjust pH to 5, heat to 52℃, stir and mix evenly to obtain material A;

[0082] (2) Mix the waterborne polyurethane emulsion, waterborne acrylic modified polyurethane emulsion and material A evenly, stir at 52°C for 40 min, then add fluorosilicone additives and wax emulsion, stir at 1000 rpm for 40 min to obtain material B.

[0083] (3) Add polyethylene glycol and aziridine crosslinking agent to material B, add 2-amino-2-methyl-1-propanol to adjust the pH to 8.0, react at 62℃ for 2.5h and then filter, adjust the solid content to 25% to obtain water-based release agent for ordinary electroplated aluminum foil.

[0084] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0085] Comparative Example 1

[0086] The difference between this comparative example and Example 1 is that the ordinary electroplated aluminum hot stamping foil water-based release agent in this comparative example does not contain water-based acrylic-modified polyurethane emulsion, but is replaced by an equal amount of water-based polyurethane emulsion. The rest of the contents of this comparative example are the same as in Example 1.

[0087] Comparative Example 2

[0088] The difference between this comparative example and Example 1 is that the water-based release agent for ordinary electroplated aluminum hot stamping foil in this comparative example does not contain fluorosilicone additives. The rest of the contents of this comparative example are the same as those in Example 1.

[0089] The performance of the water-based release agent for ordinary electroplated aluminum hot stamping foil in Examples 1-4 and Comparative Examples 1-2 was tested, and the test results are shown in Table 1 below:

[0090]

[0091] In the table above, the coating leveling test involves applying the release agent to a PET substrate at a coating speed of 100 m / min and a coating amount of 5 g / m. 2Peel strength was tested according to GB / T 2792-2014, involving 180° peeling at a speed of 300 mm / min under environmental conditions of 23℃ and 50% RH. The rate of change in peel strength after high-temperature treatment was determined by treating the coating at 180℃ for 2 hours followed by cooling. Chemical resistance was tested according to GB / T 9274-1988, using a non-woven fabric soaked in 99% ethanol to repeatedly wipe the coating surface 100 times under 500g pressure, observing for any abnormalities in appearance. The cutability test was conducted using a conventional method. A release layer was coated onto a PET substrate, followed by a color coating and vacuum aluminum deposition. An electroplated aluminum adhesive layer was then applied to obtain ordinary electroplated aluminum foil with a total thickness of 16 μm. The foil was tested using a hot stamping machine at 180°C, 1 MPa, and 10 m / min, where it was stamped onto paper. The aluminum plating patterns in Examples 1-3 showed no burrs at the edges, while the aluminum plating in Comparative Examples 1-2 exhibited slight cracking and residue. VOC content was determined using gas chromatography according to GB / T23986.2-2023. The VOC content in Examples 1-4 and Comparative Examples 1-2 was found to be less than 20 g / L.

[0092] The specific embodiments described above are further illustrations of the technical solution and beneficial effects of the present invention, and are not intended to limit the implementation methods. For those skilled in the art, any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A water-based release agent for ordinary electroplated aluminum hot stamping foil, characterized in that: The raw materials include the following parts by weight: 50-60 parts of waterborne polyurethane emulsion, 25-35 parts of waterborne acrylic-modified polyurethane emulsion, 2-8 parts of silane coupling agent, 2-6 parts of filler, 2-5 parts of wax emulsion, 2-7 parts of fluorosilicone additive, 1-3 parts of polyethylene glycol, and 1-3 parts of crosslinking agent; wherein the fluorosilicone additive is fluorinated polyether polysiloxane. The preparation method of the waterborne acrylic-modified polyurethane emulsion includes the following steps: (S1) Under a nitrogen atmosphere, add 20-25 parts by weight of isophorone diisocyanate, 15-20 parts by weight of poly(1,4-butanediol adipate), 15-20 parts by weight of polycarbonate diol, 10-15 parts by weight of polytetrahydrofuran ether diol and 4-8 parts by weight of trimethylolpropane into a reaction vessel, place it in a water bath at 75-80℃ and keep it warm and stir evenly for 30-60 min; (S2) Add 2-3 parts of catalyst to the reaction vessel and react for 30-60 min. Add 2-5 parts of dimethylolpropionic acid and 10-16 parts of acrylic acid monomer mixture and react for 3-5 h. (S3) Add 0.5-2 parts of 1,4-butanediol and 5-8 parts of acrylic acid monomer mixture to the reaction vessel and react for 1 h; (S4) Add 2-5 parts of hydroxyethyl methacrylate and 5-8 parts of acrylic monomer mixture to the reaction vessel and react for 1.5-2.5 h; then lower the temperature to 40-50℃, adjust the pH value to 7.8-8.3, and add 5-8 parts of acrylate monomer mixture and react for 20-40 min. (S5) Raise the system temperature to 75-85℃, add an initiator aqueous solution, such that the amount of initiator added is 0.5-1.5 parts, keep warm for 3-5 h, and obtain waterborne acrylic modified polyurethane emulsion. Each part of the acrylic monomer mixture comprises the following parts by weight of raw materials: 10-15 parts of isooctyl acrylate, 10-15 parts of methyl methacrylate, and 5-10 parts of ethyl acrylate.

2. The water-based release agent for ordinary electroplated aluminum hot stamping foil according to claim 1, characterized in that: The silane coupling agent is at least one of silane coupling agents KH550 and KH560.

3. The water-based release agent for ordinary electroplated aluminum hot stamping foil according to claim 1, characterized in that: The filler is at least one of nano-silica, nano-alumina, nano-calcium carbonate, and nano-montmorillonite.

4. The water-based release agent for ordinary electroplated aluminum hot stamping foil according to claim 1, characterized in that: The wax emulsion is at least one of polyethylene wax emulsion, polypropylene wax emulsion, silicone wax emulsion, and polyamide wax emulsion.

5. The water-based release agent for ordinary electroplated aluminum hot stamping foil according to claim 1, characterized in that: The crosslinking agent is at least one of carbodiimide and trimethylolpropane triglycidyl ether.

6. The water-based release agent for ordinary electroplated aluminum foil according to claim 1, characterized in that: The initiator is at least one of ammonium persulfate, potassium persulfate, and sodium bisulfite.

7. The method for preparing the water-based release agent for ordinary electroplated aluminum hot stamping foil as described in any one of claims 1-6, characterized in that, Includes the following steps: (1) Add silane coupling agent and filler in proportion, then add acetic acid dropwise to adjust pH to 4.5-5.5, heat to 50-55℃, stir and mix evenly to obtain material A; (2) Mix the waterborne polyurethane emulsion, waterborne acrylic modified polyurethane emulsion and material A evenly, stir at 50-55℃ for 30-60 min, then add fluorosilicone additives and wax emulsion, stir for 30-60 min to obtain material B; (3) Add polyethylene glycol and crosslinking agent to material B, adjust pH to 7.8-8.3, react at 60-65℃ for 2-3 hours and then filter to obtain water-based release agent for ordinary electroplated aluminum foil.

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