公开(公告)号：US20230416430A1

公开(公告)日：2023-12-28

申请号：US18254020

申请日：2021-11-19

Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A

Inventor： Fiorenza D'aprile ,  Alessio Marrani ,  Eliana leva

IPC: C08F214/26

CPC classification number: C08F214/262

Abstract: The present invention pertains to a surfactant free method for manufacturing a fluoropolymer F comprising, preferably consisting of:



from 45 to 95% by moles of recurring units derived from tetrafluoroethylene (TFE)
from 5 to 35% by moles of recurring units derived from vinylidene fluoride (VDF)
from 0.5 to 20% by moles of one or more perfluoroalkylvinylether (PAVE) of formula (I)






CF2═CF—O—Rf  (I)

wherein Rf is a C1-C6 perfluoroalkyl group and

wherein the molar amounts of said recurring units are relative to the total moles of recurring units in said polymer F.

公开(公告)号：US20230002518A1

公开(公告)日：2023-01-05

申请号：US17784965

申请日：2020-12-09

Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

Inventor： Stefana Musio ,  Fiorenza D'aprile ,  Serena Carella ,  Valeriy Kapelyushko ,  Bradley Lane Kent ,  Alessio Marrani

IPC: C08F14/24

Abstract: The present invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, comprising the following steps: provide a reactor containing a liquid reaction medium comprising water introduce in said reactor ethylene monomers and fluorinated monomers, said fluorinated monomers being selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE) or mixtures thereof, pressurize the reactor, initiate polymerization feeding into said reactor a redox initiator comprising an oxidising agent and a reducing agent, wherein said reducing agent in said redox couple initiator is free from sulphur atoms having an oxidation number of 4 or below, wherein the reaction medium is free of fluorinated surfactants.