PROCESS FOR LOW CONCENTRATION INVERSE EMULSION POLYMERIZATION OF WEAKLY NEUTRALIZED POLYMERS AND INVERSE EMULSIONS OBTAINED

摘要

The present invention relates to a process for preparing a polymer by polymerization of an aqueous solution of one or more monomers in water in oil inverse emulsion in which one or more of the monomers used comprise(s) at least one acid function the molar percentage of monomers bearing at least one weak acid function relative to all the monomers used being at least 30% characterized in that: i) the polymerization is carried out with a concentration of all the monomers in aqueous solution which falls within the range of from 1.3 mmol to 3.6 mmol per gram of aqueous solution ii) during the polymerization at most 20% of the acid functions present on the monomers which have at least one acid function are in neutralized form and also to the polymers which can be obtained by means of such a process.