Patent ID: 7485745
Filing Date: 2009-02-03
Classification: C07F,C08K

Abstract:
1. A process for preparation of a composition comprising: A) from 98 to 100% by weight of at least one monocarboxy-functionalized dialkylphosphinic ester of the formula (I) wherein R Y is methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, phenyl, 2-hydroxyethyl, 2,3-dihydroxypropyl, 2-hydroxypropyl, 3-hydroxypropyl, 4-hydroxybutyl, 3-hydroxybutyl, 2-hydroxybutyl, 6-hydroxyhexyl, allyl, or glycerol, X is H, Li, Na, K or NH or X is defined as for Y, and then X and Y are two identical radicals or two different radicals of the above organic radicals, and B) from 0 to 2% by weight of at least one halogen, wherein the at least one halogen is a chemical compound in which atoms of the 7th main group of the periodic table of elements are present and have chemical bonding to carbon or to phosphorus or salts containing halide anions, where the entirety of the components always amounts to 100% by weight, comprising the step of reacting hypophosphorous acid or a salt thereof (component C) of the formula II wherein X is H, Na, K, or NH wherein Z is C and with at least one olefin (component E) of the formula V wherein R