PROCESS FOR PREPARING OLIGOPHOSPHONIC ACIDS OR OLIGOPHOSPHINIC ACIDS, THEIR SALTS AND/OR ESTERS, AS WELL AS PHOSPHONIC ACID DERIVATIVES

摘要

This invention relates to a process for preparing oligophosphonic or oligophosphinic acids or esters or salts thereof which comprises reacting an alkali metal ester of phosphorous acid or an alkali metal ester of arylphosphonous or alkylphosphonous acid with an olefin polyhalide and, optionally, saponifying the resultant product.