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    • 10. 发明授权
    • Process for purifying a fluorinated polyether having at an end thereof a
terminal vinyl group linked thereto through an amide group-containing
linkage
    • 一种氟化聚醚的制备方法,其中末端具有通过含酰胺基键连接的末端乙烯基
    • US5789534A
    • 1998-08-04
    • US693984
    • 1996-08-08
    • Noriyuki KoikeShinichi SatoTakashi Matsuda
    • Noriyuki KoikeShinichi SatoTakashi Matsuda
    • C08G65/00C08G65/02C08G65/30C08G65/32C08G65/333C08G73/24
    • C08G65/007C08G65/30
    • The purification process comprises removing carboxylic acids and/or carboxylic acid salts contained as impurities in a fluorinated polyether having at at least one end thereof a terminal vinyl group linked thereto through an amide group-containing linkage by heating, in the presence of an amine compound such as triethylamine and dimethylaminotrimethylsilane, the fluorinated polyether containing said impurities or a reaction mixture obtained after the completion of reaction in a process of producing said fluorinated polyether. According to the purification process, the impurities can be easily removed from said fluorinated polyether. When the thus purified fluorinated polyether is used as a starting material for an addition type curable composition together with a SiH group-containing organosilicon compound, a liquid rubber material excellent in curability and storage stability can be obtained. Further, when the purified product is used as a starting material for hydrosilylation reaction, improvements in yield and reaction rate are expected.
    • 纯化方法包括除去在含氟聚醚中含有的羧酸和/或羧酸盐,所述氟化聚醚的至少一端具有通过加热在其上连接的含有酰胺基的键的末端乙烯基基团,在胺化合物存在下 例如三乙胺和二甲基氨基三甲基硅烷,含有所述杂质的氟化聚醚或在制备所述氟化聚醚的方法中反应完成后获得的反应混合物。 根据纯化方法,可以容易地从所述氟化聚醚中除去杂质。 当将这样纯化的氟化聚醚与含SiH基的有机硅化合物一起用作添加型固化性组合物的原料时,可以获得固化性和保存稳定性优异的液体橡胶材料。 此外,当纯化产物用作氢化硅烷化反应的原料时,预期产率和反应速率提高。