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    • 4. 发明申请
    • METHOD FOR PRODUCING DIALKYLPHOSPHINIC ACID SALTS
    • 用于生产二烷基次膦酸盐
    • WO99028329A1
    • 1999-06-10
    • PCT/EP1998/007352
    • 1998-11-17
    • C01B25/163C07B61/00C07F9/30
    • C07F9/30
    • The invention relates to a method for producing dialkylphosphinic acid salts, characterised in that a) elemental yellow phosphor is reacted with alkyl halides in the presence of alkali or alkaline-earth hydroxide to form a mixture containing the salts of alkylphosphonous, phosphorous and hypophosphorous acids as the principal constituents; b) the mixture is adjusted to a pH of less than 7 and then reacted with olefins in the presence of a radical starter and c) the dialkylphosphinic acids and/or their alkali salts obtained according to b) are reacted with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, and/or K to form dialkylphosphinic acid salts of the metals. The invention also relates to the use of the dialkylphosphinic acid salts of metals obtained according to the inventive method for producing flameproofing agents.
    • 本发明涉及一种方法,用于元素黄磷与碱金属或碱土金属氢氧化物的存在下烷基卤反应以形成混合物,其包含作为主要成分的烷基亚膦,磷和次磷酸的盐的制备二烷基次膦酸盐,其特点在于:a)进行反应,B )调节混合物至pH为小于7,然后在与烯烃的自由基引发剂的存在下,和c)中获得的二烷基次膦酸,根据b)和/或与Mg,Ca,铝,锑,锡,锗的金属化合物和它们的碱金属盐 ,钛,锌,铁,锆,铈,铋,锶,锰,锂,钠和/或K,得到金属的二烷基次膦酸盐反应。 本发明还涉及使用通过本发明阻燃剂的制备方法制备的金属二烷基次膦盐。