PREPARATION OF AMPHIPHILIC BLOCK POLYMERS BY CONTROLLED RADICAL MICELLAR POLYMERISATION

摘要

The present invention relates to the preparation of block copolymers, useful in particular as a rheology agent, suitable inter alia for petroleum extraction, which comprises a micellar radical polymerization step which is brought into contact, in an aqueous medium hydrophilic monomers, solubilized or dispersed in the aqueous medium; hydrophobic monomers in the form of a micellar solution, namely containing, in the dispersed state, micelles comprising these hydrophobic monomers; at least one radical polymerization initiator; and at least one radical polymerization control agent. The polymers obtained according to the invention are especially useful for enhanced oil recovery (EOR).