Method for producing salts of dialkylphosphinic acids

Details Method for producing salts of dialkylphosphinic acids Method for producing salts of dialkylphosphinic acids

C - Chemistry, Metallurgy

07

F

C07F 9/30 (2006.01)

Patent

CA 2311675

The invention relates to a method for producing salts of dialkylphosphinic acids, characterised in that a) alkylphosphonous acid and/or hypophosphorous acid and/or their alkali salts are reacted with olefins in the presence of a radical starter to form dialkylphosphinic acids and/or their alkali salts and b) the dialkylphosphinic acids and/or their alkaline salts obtained according to a) 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.

L'invention concerne un procédé pour la préparation de sels des acides dialkylphosphiniques, caractérisé en ce que l'on fait réagir a) de l'acide alkylphosphonique et/ou de l'acide hypophosphoreux et/ou leurs sels alcalins avec des oléfines en présence d'un initiateur radicalaire pour former des acides dialkylphosphiniques et/ou leurs sels alcalins, et en ce que l'on fait réagir b) les acides dialkylphosphiniques et/ou leurs sels alcalins, obtenus selon a), avec des composés métalliques de Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, et/ou K pour former les sels des acides dialkylphosphiniques de ces métaux. L'invention concerne également l'utilisation des sels des acides dialkylphosphiniques de ces métaux, préparés selon ce procédé, pour la fabrication d'agents ignifuges.

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