Fluororesin powder coating composition
A powder coating, fluororesin technology, applied in powder coatings, coatings, etc., can solve the problems of damaged coating smoothness, reduced weather resistance, and high melting temperature
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Synthetic example 1
[0089] In an autoclave with a stainless steel stirrer, 280 g of ethyl vinyl ether (EVE), 48 g of Veova10 (trade name: vinyl ester manufactured by Shell Chemical Corporation), 20 g of vinyl benzoate, 22 g of 4- Hydroxybutyl vinyl ether (HBVE), 1000g of ion-exchanged water, 2.2g of potassium carbonate (K 2 CO 3 ), 0.7 g of ammonium persulfate (APS), 31 g of emulsifier (manufactured by Nippon Emulsifier Co., Ltd.: N-1110) and 1.0 g of emulsifier (manufactured by Nikko Chemical Co., Ltd.: SLS), cooled with ice, and carried out with nitrogen gas Pressurize and degas so that the air pressure becomes 0.3 MPa.
[0090] After repeating this pressurized degassing twice, after degassing and removing the dissolved air, add 530g of tetrafluoroethylene (TFE), and carry out the reaction at 30°C for 12 hours to obtain a fluorine-containing copolymer with a solid content concentration of 50.2%. Aqueous dispersion 1 of the body, the Tg of the fluorine-containing interpolymer is 35°C.
Synthetic example 2
[0092] In an autoclave with a stainless steel stirrer, add 161g of ethyl vinyl ether (EVE), 178g of cyclohexyl vinyl ether (CHVE), 141g of 4-hydroxybutyl vinyl ether (HBVE), 1000g of Ion-exchanged water, 2.2g of potassium carbonate (K 2 CO 3 ), 0.7g of ammonium persulfate (APS), 31g of emulsifier (manufactured by Nippon Emulsifier Co., Ltd.: N-1110) and 1.0g of emulsifier (manufactured by Nikko Chemical Co., Ltd.: SLS), cooled with ice, and nitrogen Pressurized degassing was performed so that the air pressure became 0.3 MPa.
[0093] After repeating this pressurized degassing twice, after degassing and removing dissolved air, add 482 g of chlorotrifluoroethylene (CTFE), and carry out a reaction at 30° C. for 12 hours to obtain a fluorine-containing product with a solid content concentration of 50.1%. Aqueous dispersion 2 of a copolymer, the Tg of this fluorinated copolymer is 30°C.
Synthetic example 3
[0095] In an autoclave with a stainless steel stirrer with an inner volume of 2L, put 1100g of ion-exchanged water, 4.75g of fluorine-based anionic emulsifier (FC-143: manufactured by Sumitomo 3M), 24.7g of nonionic A neutral emulsifier (N-1110: manufactured by Nippon Emulsifier Co., Ltd.) and 39.8 g of tert-butanol were degassed with a vacuum pump, and repeatedly pressurized with nitrogen to remove air. Next, a monomer formed of tetrafluoroethylene / propylene / ethylene / 4-hydroxybutyl vinyl ether mixed in a ratio of 80 / 8 / 10 / 2 mole % was introduced into the autoclave so as to reach 2.2 MPa at 65°C.
[0096] Thereafter, 7 cc of a 30% aqueous solution of ammonium persulfate was added to start the reaction. While the pressure was lowered, the pressure was increased to maintain the pressure, and 630 g of monomers obtained by mixing tetrafluoroethylene / propylene / ethylene at 59.1 / 20.4 / 20.5 mol % were continuously added and reacted continuously. 33 g of HBVE was added from the injectio...
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