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发明授权
CN101541840B 含氟乳化剂的含量降低了的含氟聚合物水性分散液的制造方法 有权

含氟乳化剂的含量降低了的含氟聚合物水性分散液的制造方法
摘要：
本发明提供采用弱碱性阴离子交换树脂有效地从含氟聚合物水性分散液吸附并除去含氟乳化剂，制造含氟乳化剂的含量降低了的含氟聚合物水性分散液的方法。含氟乳化剂的含量降低了的含氟聚合物水性分散液的制造方法是在含有含氟乳化剂的含氟聚合物水性分散液中添加下述通式(1)表示的有机羧酸，然后，使其与弱碱性阴离子交换树脂接触，吸附并除去含氟乳化剂，Q(CH2)m(CH(OH))nCOOH …(1)式中，Q为H、CH3或COOH，m及n分别独立地为0或1～4的整数，4≥n+m≥1。
摘要（英）：

Disclosed is a method for producing an aqueous fluorine-containing polymer dispersion having a reduced fluorine-containing emulsifier content, wherein a fluorine-containing emulsifier is effectively adsorbed and removed from the aqueous fluorine-containing polymer dispersion by using a weak basic anion exchange resin. Specifically disclosed is a method for producing an aqueous fluorine-containing polymer dispersion having a reduced fluorine-containing emulsifier content, wherein an organic carboxylic acid represented by the general formula (1) below is added into an aqueous fluorine-containing polymer dispersion containing a fluorine-containing emulsifier and then the dispersion is brought into contact with a weak basic anion exchange resin, thereby adsorbing and removing the fluorine-containing emulsifier from the dispersion. Q(CH2)m(CH(OH))nCOOH...(1) (In the formula, Q represents H, CH3 or COOH; and m and n independently represent 0 or an integer of 1-4, while satisfying 4 >= n + m>= 1.).

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