公开(公告)号：US10377843B2

公开(公告)日：2019-08-13

申请号：US15310749

申请日：2015-05-11

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

Inventor： Marco Dossi ,  Giovanni Comino ,  Laura Ponta

IPC: C08F2/22 ,  C08F2/38 ,  C08F14/22 ,  C08F14/26 ,  C08F214/22 ,  C08F214/26 ,  C08L27/16

Abstract: The invention pertains to a method for emulsion polymerization of at least one fluoromonomer, said method comprising: (i) providing at least one aqueous emulsion comprising at least one surfactant and a monomer mixture [mixture (M)] comprising at least one fluoromonomer [monomer (F)] and optionally at least one additional monomer, and at least one RAFT/MADIX agent; (ii) initiating the polymerization of said monomer mixture in said aqueous emulsion adding at least one radical initiator; (iii) continuing the polymerization by adding additional amounts of said mixture (M) and said RAFT/MADIX agent, until converting the targeted amount of said mixture (M), and (iv) terminating the polymerization and recovering a latex of fluoropolymer [polymer (F)]; wherein the amount of RAFT/MADIX agent is comprised between 0.1 and 0.5% moles, with respect to the total amount of converted monomers of said monomer mixture, and wherein the amount of said RAFT/MADIX agent present in the aqueous emulsion when initiating the polymerization in step (ii) is of at most 50% with respect to the total amount of said RAFT/MADIX agent.

公开(公告)号：US20230047767A1

公开(公告)日：2023-02-16

申请号：US17784939

申请日：2020-12-11

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

Inventor： Jung-Yul Lee ,  Dong-Cheol Choe ,  Min-Soo Yoon ,  Laura Ponta ,  Mattia Bassi

IPC: G03F7/004 ,  C08F214/18 ,  G03F7/027

Abstract: The invention pertains to a method of removing a layer of a lift-off fluoropolymer layer from a substrate using a particular stripping solvent, and to a lithographic process using said combination of lift-off fluoropolymer and stripping solvent, in particular for the manufacture of OLED devices.

公开(公告)号：US11485804B2

公开(公告)日：2022-11-01

申请号：US16757373

申请日：2018-10-16

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

Inventor： Fiorenza D'Aprile ,  Valeriy Kapelyushko ,  Bradley Lane Kent ,  Giulio Brinati ,  Laura Ponta

IPC: C08F14/22 ,  C08F2/00 ,  C08F2/22 ,  C08F214/22 ,  C08F228/02

Abstract: The present invention relates to a fluorosurfactant-free emulsion polymerization method for the synthesis of a fluoropolymer, more in particular of a VDF-based polymer.