Method for synthesizing polymers from acrylic acid, one of the salts of same or the mixture thereof

摘要

The present invention concerns a method for preparing a polymer comprising a step of radical polymerization of monomers comprising at least monomers (M1) chosen from acrylic acid, one of the salts of same, or the mixture thereof, in which said radical polymerization step is carried out:
continuously;at a pH which remains between 3 and 5 during the polymerization step;in the presence of a metabisulfite/persulfate redox pair, for example the sodium metabisulfite/sodium persulfate pair, as a radical initiator, with a metabisulfite/persulfate molar ratio of between 1 and 3.5 and an initiator/monomer molar percentage of between 5% and 18%.

主权项

1. A process for preparing a polymer comprising a step of radical polymerization of monomers comprising at least monomers (M1) selected from a group consisting of acrylic acid, a salt thereof, and a mixture thereof, wherein said radical polymerization step is carried out:
continuously; at a pH which remains included from 3 to 5 during the polymerization step; in the presence of a metabisulfite/persulfate redox couple, as a radical initiator, with a metabisulfite/persulfate molar ratio included from 1 to 3.5 and an initiator/monomer molar percentage included from 5% to 18%.