High-impermeability epoxy powder paint and preparation method thereof
An epoxy powder and permeability technology, used in powder coatings, epoxy resin coatings, anti-corrosion coatings, etc., can solve problems such as weak permeability resistance, and achieve strong adhesion, good permeability resistance, and good scratch resistance. Effect
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Embodiment 1
[0047] A kind of high impermeability epoxy powder coating proportion by weight is: 50 parts of GESR904H, 9 parts of HB310, 0.1 part of 2-methylimidazole, 6 parts of titanium dioxide, 24 parts of precipitated barium sulfate, 400 mesh sieved wet 8 parts of French sericite powder, 1 part of nano-silica, 1 part of polybutylacrylate adsorbed by silica, 0.7 part of polylauryl methacrylate, 0.1 part of 2-hydroxy-1,2-diphenylethanone Parts, fumed silica 0.1 part.
[0048] When preparing:
[0049] The speed of the pre-mixer was controlled at 1300 r / min, and the pre-mixing time was controlled at 5 min.
[0050] The temperature of zone I of the twin-screw extruder is set at 110°C, the temperature of zone II is set at 97°C, the temperature of zone III is set at 70°C, and the extruder is preheated for 1 hour after the temperature reaches the set temperature.
[0051] For other unmentioned preparation methods, please refer to the technical scheme.
Embodiment 2
[0053] A kind of high impermeability epoxy powder coating proportion by weight is: 58 parts of GESR904H, 10.5 parts of HB310, 0.3 part of 2-methylimidazole, 4.5 parts of titanium dioxide, 17 parts of precipitated barium sulfate, 800 mesh sieved wet 6 parts of French sericite powder, 1.5 parts of nano-titanium dioxide, 0.8 parts of polybutyl acrylate adsorbed by silica, 0.9 parts of polylauryl methacrylate, 0.3 parts of 2-hydroxy-1,2-diphenylethanone, 0.2 parts of fumed silica.
[0054] When preparing:
[0055] The speed of the pre-mixer was controlled at 1400 r / min, and the pre-mixing time was controlled at 4 minutes.
[0056] The temperature in zone I of the twin-screw extruder is set at 115°C, the temperature in zone II is set at 94°C, and the temperature in zone III is set at 65°C. After the temperature reaches the set temperature, the extruder is preheated for 1 hour.
[0057] For other unmentioned preparation methods, please refer to the technical scheme.
Embodiment 3
[0059] A kind of high impermeability epoxy powder coating proportioning by weight is: 65 parts of GESR904H, 12 parts of HB310, 0.5 part of 2-methylimidazole, 3 parts of titanium dioxide, 10 parts of precipitated barium sulfate, 800 mesh sieved wet 4 parts of French sericite powder, 3 parts of nano-montmorillonite, 0.7 parts of polybutyl acrylate adsorbed by silica, 1 part of polylauryl methacrylate, 0.5 parts of 2-hydroxy-1,2-diphenylethanone parts, fumed silica 0.3 parts.
[0060] When preparing:
[0061] The speed of the pre-mixer is controlled at 1500 r / min, and the time of pre-mixing is controlled at 3 min.
[0062] The temperature in zone I of the twin-screw extruder is set to 120°C, the temperature in zone II is set to 90°C, and the temperature in zone III is set to 60°C. After the temperature reaches the set temperature, the extruder is preheated for 0.5h.
[0063] For other unmentioned preparation methods, please refer to the technical scheme.
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