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Title:
METHOD FOR MANUFACTURING FLUOROELASTOMERS
Document Type and Number:
WIPO Patent Application WO/2012/150256
Kind Code:
A1
Abstract:
The invention pertains to a process for manufacturing a fluoroelastomer [fluoroelastomer (A)] having a heat of fusion of less than 5 J/g as measured by ASTM D-3418-08, said method comprising emulsion polymerizing vinylidene fluoride (VDF) in the presence of at least one additional fluorinated monomer, in an aqueous polymerization medium, said method comprising polymerizing VDF and said additional fluorinated monomer(s) in the presence of a redox radical initiator system comprising: - at least one organic oxidizing agent [agent (O)]; - at least one organic reducing agent [agent (R)]; wherein agent (O) is fed to said polymerization medium separately from agent (R), so that agent (O) comes in contact with agent (R) exclusively in said polymerization medium comprising VDF and optional additional monomer(s), to fluoroelastomers having low amount of chain defects and low amount of polar end groups, notably obtainable from said process, and to curable compositions therefrom.

Inventors:
CHERNYSHEVA LIUBOV (IT)
KENT BRADLEY LANE (US)
COMINO GIOVANNI (IT)
KAPELYUSHKO VALERIY (IT)
Application Number:
PCT/EP2012/058018
Publication Date:
November 08, 2012
Filing Date:
May 02, 2012
Export Citation:
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Assignee:
SOLVAY SPECIALTY POLYMERS IT (IT)
CHERNYSHEVA LIUBOV (IT)
KENT BRADLEY LANE (US)
COMINO GIOVANNI (IT)
KAPELYUSHKO VALERIY (IT)
International Classes:
C08F214/22
Domestic Patent References:
WO2011073344A12011-06-23
WO1998038242A11998-09-03
WO2008080897A12008-07-10
WO2010003929A12010-01-14
WO2004041878A12004-05-21
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WO1997005122A11997-02-13
Foreign References:
US5654373A1997-08-05
EP1845116A12007-10-17
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Other References:
PIANCA, M. ET AL.: "End groups in fluoropolymers", JOURNA/ OFF/URINE CHEMISTRY, vol. 95, 1999, pages 71 - 84, XP004170520, DOI: doi:10.1016/S0022-1139(98)00304-2
Attorney, Agent or Firm:
BENVENUTI, Federica et al. (Rue de Ransbeek 310, Bruxelles, BE)
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