Preparation method of cationic acrylate epoxy resin
An acrylate and epoxy resin technology, used in epoxy resin coatings, coatings, electrophoretic coatings, etc., can solve the problems of yellowing, difficult to high-quality outdoor paints and high-decorative paints, poor weather resistance, etc. Achieve the effect of increasing surface charge concentration, improving poor stability and improving compatibility
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[0014] Example
[0015] (1) Preparation of prepolymer
[0016] Add 199 parts of TDI into a reactor equipped with a stirrer, a reflux condenser and a thermometer, start stirring, heat up to 45°C, and add 39 parts of ethylene glycol ethyl ether and 138 parts of diethylene glycol ethyl ether into the dropping tank , Start dropping the mixture of ethylene glycol ethyl ether and diethylene glycol ethyl ether, the dropping temperature is strictly controlled at 50±2℃, and the dropping time is controlled within the range of 180-210min. Pay attention to the dropping speed to prevent the temperature from being too high. After the dripping is finished, keep stirring at 50℃ for more than 30mmin, then add 11 parts of methyl isobutyl ketone, then heat to 70℃, keep at 70±2℃ for 90min, after the detection index meets the technical requirements, cool down for use;
[0017] (2) Preparation of cationic acrylate resin
[0018] Add 252 parts of solvent propylene glycol methyl ether and 20 parts of n-...
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