THICKENER COMPRISING AT LEAST ONE POLYMER BASED ON ASSOCIATIVE MONOMERS AND PREPARABLE BY INVERSE EMULSION POLYMERIZATION

摘要

The present invention relates to a thickener preparable by a process wherein a polymer is obtained by an inverse emulsion polymerization of;a) at least one water-soluble ethylenically unsaturated monomer comprising at least one anionic monomer and/or at least one nonionic monomer,;b) at least one ethylenically unsaturated associative monomer,;c) optionally at least one crosslinker,;d) optionally at least one chain transfer agent,;where the temperature during the inverse emulsion polymerization is kept constant and is at least 40° C., preferably 50 to 90° C., and, when the inverse emulsion polymerization is complete, the activator is added, giving the thickener.