Patent ID: 9593220
Date: 2017-03-14
CPC Classifications: C07F,C08G,C08J,C08K,C08L,C09K

Claim:
1. A hydroxymethylphosphonate produced by the method comprising reacting paraformaldehyde, at least one dialkyl phosphite of the general formula: or the general formula: and at least one trialkyl phosphite, of the general formula: or of the general formula: wherein each R is independently the same or different, linear or branched alkyl of from 1 to about 8 carbon atoms, linear or branched alkenyl group of from 2 to about 10 carbon atoms, cycloalkenyl group of from about 5 to about 10 carbon atoms, and, cycloalkyl group of from about 5 to about 10 carbon atoms; and R* is a linear or branched divalent alkylene group of from 2 to about 10 carbon atoms, linear or branched divalent alkenylene group of from 2 to about 10 carbon atoms, divalent cycloalkenyl group of from about 5 to about 10 carbon atoms, and divalent cycloalkyl group of from about 5 to about 10 carbon atoms, in the presence of at least one amine catalyst, to produce a hydroxymethylphosphonate with a lower acid content than an equivalent method which is conducted in the absence of trialkylphosphite.