公开(公告)号：US10450397B2

公开(公告)日：2019-10-22

申请号：US15128162

申请日：2015-03-16

Applicant: RHODIA OPERATIONS

Inventor： Simon Harrisson ,  James Wilson

IPC: C08F2/38 ,  C08F293/00 ,  C08F2/22 ,  C08F2/26 ,  C08F220/56

Abstract: The present invention relates to a process for preparing a polymer with a mass Mw of less than 300 000 g/mol (especially between 1000 and 300 000 g/mol), comprising a step (E) of controlled radical polymerization in which the following are placed in contact in an aqueous medium in which are dispersed surfactant micelles: ethylenically unsaturated hydrophilic monomers predominantly present in the aqueous medium; partially water-soluble ethylenically unsaturated hydrophobic monomers different from the preceding monomers, at least partly present in the surfactant micelles, and having a solubility in the aqueous medium at least equal to that of hexyl acrylate; at least one radical polymerization initiator; and at least one radical polymerization control agent.

公开(公告)号：US11267923B2

公开(公告)日：2022-03-08

申请号：US16655475

申请日：2019-10-17

Applicant: RHODIA OPERATIONS

Inventor： Simon Harrisson ,  James Wilson

IPC: C08F2/22 ,  C08F2/26 ,  C08F2/38 ,  C08F220/56 ,  C08F293/00

Abstract: The present invention relates to a process for preparing a polymer with a mass Mw of less than 300 000 g/mol (especially between 1000 and 300 000 g/mol), comprising a step (E) of controlled radical polymerization in which the following are placed in contact in an aqueous medium in which are dispersed surfactant micelles: ethylenically unsaturated hydrophilic monomers predominantly present in the aqueous medium; partially water-soluble ethylenically unsaturated hydrophobic monomers different from the preceding monomers, at least partly present in the surfactant micelles, and having a solubility in the aqueous medium at least equal to that of hexyl acrylate; at least one radical polymerization initiator; and at least one radical polymerization control agent.