Compounds of mono-carboxyl functionalised dialkylphosphine acid salts, a method for their manufacture and their application

摘要

Mixture comprises dialkylphosphinic acid and further components such as mono-carboxylfunctionalized dialkylphosphinic acid (I) (98-100 wt.%) and halogen (0-2 wt.%). Mixture comprises dialkylphosphinic acid and further components such as mono-carboxylfunctionalized dialkylphosphinic acid (I) of formula (R 2-CH(R 1)-C(R 3)(R 4)-P(O)(OX)-C(R 6)(R 5)-CH(R 7)-C(O)-OY 1) (98-100 wt.%) and halogen (0-2 wt.%). R 1-R 7H, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl and/or phenyl; and X, Y 1H, Li, Na, K or NH 4. An independent claim is included for a method for the preparation of mixture comprising reacting hypophosphoric acid (II) of formula (H-P(O)(OX)-H) or its salt with alpha , beta -unsaturated carboxylic acid derivative (III) of formula (C(R 6)(R 5)=C(R 7)(COOZ)) in the presence of radical initiator (where Z is either H (preferred), 1-8C-alkyl or 6-18C-aryl, or Y 1>) or with olefin compound (IV) of formula (CH(R 2)(R 1)=CH(R 4)(R 3)).