A kind of thermosetting acrylic resin powder coating composition and preparation method thereof
A technology of acrylic resin and powder coating, which is applied in the direction of powder coating and coating, and can solve the problems of inconvenient operation, affecting the weather resistance of the coating film, application performance of water boiling resistance, poor adhesion, etc.
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Synthetic example 1
[0024] Add 600g of toluene to a 3000ml four-neck flask equipped with a stirring device, condenser, dropping funnel, thermometer and nitrogen inlet, fill with nitrogen, heat to reflux, drop the monomer mixture (see Table 1 for the formula), drop The addition time was controlled at 3.5 hours. After the dropwise addition, the temperature was lowered to 70°C, and the reaction was held for 3 hours. 3g of 2,2-azobisisobutyronitrile was dissolved in 20g of toluene, added to the reaction system, and the reaction was continued for 1.5 hours. Use atmospheric distillation to remove most of the solvent, and when a small amount of solvent remains, use reduced pressure distillation to remove the solvent, discharge while hot, cool, and pulverize. Finally, the product silane-modified acrylic resin 1 was obtained.
[0025] The preparation method of Synthesis Example 2-3 is the same as that of Synthesis Example 1. The ratio of the monomer mixture is shown in Table 1. Silane-modified acrylic res...
Synthetic example 4
[0030] Add 600g of toluene to a 3000ml four-neck flask equipped with a stirring device, condenser, dropping funnel, thermometer and nitrogen inlet, fill with nitrogen, heat to reflux, drop the monomer mixture (see Table 2 for the formula), drop The addition time was controlled to be 3.5 hours. After the dropwise addition, the temperature was lowered to 90° C., and the temperature was maintained at this temperature for 3 hours. Dissolve 2 g of tert-butyl peroxide in 20 g of toluene and add it to the reaction system to continue the reaction for 1 hour. Use atmospheric distillation to remove most of the solvent, and when a small amount of solvent remains, use reduced pressure distillation to remove the solvent, discharge while hot, cool, and pulverize. Finally, a silane-modified acrylic resin 4 was obtained. The experimental results are shown in Table 2.
Synthetic example 5-6
[0032] The preparation method is the same as in Example 4. The monomer mixture formula is shown in Table 2, and silane-modified acrylic resins 5-6 were prepared. The experimental results are shown in Table 2.
[0033] Table 2
[0034] Raw materials / amount
[0035] *: 3-Methacryloxypropyltriethoxysilane
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