公开(公告)号：US20240317903A1

公开(公告)日：2024-09-26

申请号：US18578651

申请日：2022-07-06

Applicant: SPECIALTY OPERATIONS FRANCE

Inventor： David James Wilson ,  Arnaud Cadix ,  Hajeeth Thankappan

IPC: C08F2/08 ,  C08F2/38 ,  C08F220/18 ,  C08F293/00

CPC classification number: C08F2/08 ,  C08F2/38 ,  C08F220/1812 ,  C08F293/005 ,  C08F2400/02 ,  C08F2438/03

Abstract: The present invention relates to the preparation of block copolymers which are particularly useful as a rheology agent, and which are suitable, inter alia, for oil extraction, which comprises a step of radical polymerization in which the following are brought into contact, in an oily medium:



monomers dissolved in the oily medium;
monomers which are insoluble in the oily medium, in the form of a micellar solution;
at least one radical polymerization initiator; and
preferably at least one radical polymerization control agent.




The invention also relates to the polymers obtained by this process and the use thereof as surfactants or dispersants.