Preparation method of low-temperature curing cathode electrophoretic paint
A cathodic electrophoresis, low-temperature technology, used in electrophoretic coatings, coatings, anti-corrosion coatings, etc., can solve the problems of reduced flexibility, easy deformation or melting of the coating film, and achieve improved solvent resistance, easy handling, and enhanced acid resistance. Effect
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example 1
[0022] Take 1.2g of trimethylolpropane, 0.6g of montmorillonite, and 12g of N-methyldiethanolamine, put them into a three-necked flask, disperse ultrasonically at 300W for 1h, heat to 100°C, stir at 300r / min for 1h, and cool down to 40 ℃, add 45g isophorone diisocyanate dropwise at 1mL / min, add 0.1g dibutyltin dilaurate after the dropwise addition, keep stirring for 1h to obtain a reaction solution, raise the temperature of the reaction solution to 70℃, and add 5.0g ring Oxygen resin E-12, add 8g of 1,4-butanediol after heat preservation reaction for 30min, cool down to 50°C after heat preservation reaction for 2h, then add 6g urushiol, cool down to room temperature after reaction for 1h, and adjust the pH to neutral with glacial acetic acid, To obtain a hydroxyl-terminated cationic polyurethane resin, take 200g of epoxy resin E-51, 115g of bisphenol A epoxy resin, 20g of polyethylene glycol, and 0.04g of dimethylbenzylamine, and stir at 300r / min for 1h at 120°C. Then add 30g ...
example 2
[0024]Take 1.5g of trimethylolpropane, 0.75g of montmorillonite, and 15g of N-methyldiethanolamine into a three-necked flask, disperse ultrasonically at 300W for 1h, heat to 13°C, stir at 350r / min for 1h, and cool down to 45°C. ℃, add 52g of isophorone diisocyanate dropwise at 1mL / min, add 0.15g of dibutyltin dilaurate after the dropwise addition, keep stirring for 1h to obtain a reaction solution, raise the temperature of the reaction solution to 75℃, and add 5.8g of dibutyltin dilaurate Oxygen resin E-12, add 10g of 1,4-butanediol after heat preservation reaction for 35min, cool down to 55°C after heat preservation reaction for 2h, then add 8g urushiol, cool down to room temperature after reaction for 1h, and adjust the pH to neutral with glacial acetic acid, To obtain a hydroxyl-terminated cationic polyurethane resin, take 250g of epoxy resin E-51, 145g of bisphenol A epoxy resin, 25g of polyethylene glycol, and 0.05g of dimethylbenzylamine, and stir at 350r / min for 1h at 12...
example 3
[0026] Take 1.8g of trimethylolpropane, 0.9g of montmorillonite, and 18g of N-methyldiethanolamine into a three-necked flask, disperse ultrasonically at 300W for 2h, heat to 105°C, stir at 400r / min for 2h, and cool down to 50 ℃, add 60g of isophorone diisocyanate dropwise at 1mL / min, add 0.2g of dibutyltin dilaurate after the dropwise addition, keep stirring for 2 hours to obtain a reaction solution, raise the temperature of the reaction solution to 80℃, and add 7.5g of cyclo Oxygen resin E-12, add 12g of 1,4-butanediol after heat preservation reaction for 40min, cool down to 60°C after heat preservation reaction for 3h, then add 9g urushiol, cool down to room temperature after reaction for 2h, and adjust the pH to neutral with glacial acetic acid, To obtain a hydroxyl-terminated cationic polyurethane resin, take 300g of epoxy resin E-51, 175g of bisphenol A epoxy resin, 30g of polyethylene glycol, and 0.06g of dimethylbenzylamine, and stir at 400r / min at 130°C for 2h. Then ad...
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