公开(公告)号：US12252560B2

公开(公告)日：2025-03-18

申请号：US17603211

申请日：2020-04-14

Applicant: SPECIALTY OPERATIONS FRANCE

Inventor： Lichang Zhou ,  DongCheel Lee ,  Tiffany Chen ,  Fabio Trezzi ,  Shailesh Majmudar ,  Homayoun Jamasbi ,  An Tran ,  Pierre-Emmanuel Dufils ,  Laurianne Timbart ,  David James Wilson ,  Changheon Kang

IPC: C08F218/08 ,  C08F2/22 ,  C08F2/38 ,  C08F212/08 ,  C08F220/14 ,  C08F220/18 ,  C09D5/02 ,  C09D133/12

Abstract: Processes to prepare aqueous polymer dispersions are provided, as well as compositions thereof, which have high solids content (e.g., 50%) with low viscosity. The process uses a selective hydrophilic macro-RAFT agent of formula (I), and is substantially free of surfactants. This process can be used to make latex polymers with good stability, which can be used widely in coatings (e.g., architectural paints, stone paints, industrial coatings, wood coatings, etc.), adhesives, sealants and mastic compositions.

公开(公告)号：US20240376065A1

公开(公告)日：2024-11-14

申请号：US18293303

申请日：2022-07-21

Applicant: SPECIALTY OPERATIONS FRANCE ,  Université d'Aix-Marseille ,  Centre National de la Recherche Scientifique

Inventor： Pierre-Emmanuel Dufils ,  Christopher Mark Plummer ,  David James Wilson ,  Didier Gigmes ,  Yohann Guillaneuf

IPC: C07D319/08 ,  C08G75/26

Abstract: The instant invention relates to thionolactone compounds useful as comonomers to introduce weak bonds for polymer degradation or functionalization. The invention is also directed to processes for the preparation of said compounds, notably by thionation of the corresponding lactones. The invention is furthermore directed to uses of said thionolactones as comonomers, copolymers made from these comonomers, and processes for the preparation of said copolymers.