Title:
METHOD FOR THE CONTROLLED POLYMERIZATION OF FLUOROMONOMERS
Document Type and Number:
WIPO Patent Application WO/2015/173193
Kind Code:
A1
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.
Inventors:
DOSSI MARCO (IT)
COMINO GIOVANNI (IT)
PONTA LAURA (IT)
COMINO GIOVANNI (IT)
PONTA LAURA (IT)
Application Number:
PCT/EP2015/060375
Publication Date:
November 19, 2015
Filing Date:
May 11, 2015
Export Citation:
Assignee:
SOLVAY SPECIALTY POLYMERS IT (IT)
International Classes:
C08F14/18; C08F214/22; C08F2/38
Domestic Patent References:
| WO2013113750A1 | 2013-08-08 |
Foreign References:
| FR2826658A1 | 2003-01-03 | |||
| FR2983484A1 | 2013-06-07 |
Other References:
GEORGI KOSTOV ET AL: "First Amphiphilic Poly(vinylidene fluoride-co-3,3,3-trifluoropropene)-b-oligo(vinyl alcohol) Block Copolymers as Potential Nonpersistent Fluorosurfactants from Radical Polymerization Controlled by Xanthate", MACROMOLECULES, AMERICAN CHEMICAL SOCIETY, US, vol. 44, no. 7, 12 April 2011 (2011-04-12), pages 1841 - 1855, XP001561523, ISSN: 0024-9297, [retrieved on 20110301], DOI: 10.1021/MA102679F
SÉBASTIEN PERRIER ET AL: "Macromolecular design via reversible addition-fragmentation chain transfer (RAFT)/xanthates (MADIX) polymerization", JOURNAL OF POLYMER SCIENCE PART A: POLYMER CHEMISTRY, vol. 43, no. 22, 15 November 2005 (2005-11-15), pages 5347 - 5393, XP055032600, ISSN: 0887-624X, DOI: 10.1002/pola.20986
SÉBASTIEN PERRIER ET AL: "Macromolecular design via reversible addition-fragmentation chain transfer (RAFT)/xanthates (MADIX) polymerization", JOURNAL OF POLYMER SCIENCE PART A: POLYMER CHEMISTRY, vol. 43, no. 22, 15 November 2005 (2005-11-15), pages 5347 - 5393, XP055032600, ISSN: 0887-624X, DOI: 10.1002/pola.20986
Attorney, Agent or Firm:
BENVENUTI, Federica et al. (310, Bruxelles, BE)
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