申请人:DAIKIN INDUSTRIES, LTD.
公开号:EP3957656A1
公开(公告)日:2022-02-23
A method for producing a fluoropolymer powder including (Al) adding, to a fluoropolymer aqueous dispersion obtained by polymerization using a carboxylic acid type hydrocarbon surfactant, an acid to adjust a pH to 4.0 or less and cause coagulation to thereby obtain a wet fluoropolymer powder containing a fluorine-containing compound represented by the following general formula (1A), and (Bl) heat-treating the wet fluoropolymer powder at a temperature higher than 150°C and lower than 240°C:
General Formula (1A) : H-(CF2)m-COOH
wherein m is 3 to 19.
一种生产含氟聚合物粉末的方法,包括(Al)向通过使用羧酸型烃类表面活性剂聚合得到的含氟聚合物水分散液中添加一种酸,以将pH值调节到4.0或更低,并使其凝结,从而得到含有由以下通式(1A)表示的含氟化合物的湿含氟聚合物粉末,以及(Bl)在高于150℃但低于240℃的温度下对湿含氟聚合物粉末进行热处理:
通式 (1A) :H-(CF2)m-COOH
其中 m 为 3 至 19。