Title:
ALLYL-BEARING FLUORINATED IONOMERS
Document Type and Number:
WIPO Patent Application WO/2014/023611
Kind Code:
A1
Abstract:
The present invention provides a fluorinated ionomer [polymer (I)] comprising recurring units derived from at least the following monomers: (i) 5 to 50 % by weight of a fluorinated monomer [monomer (A)] containing at least one -SO2X functionality, preferably having the formula of CF2=CF-O-(CF2CF(CF3)O)m-(CF2)nSO2X (I) wherein m is 0 or 1, n is an integer between 0-10, and X is selected from F, OH, and O-Me+, wherein Me+ indicates an alkali metal ion or an ammonium cation of formula NR4
+ where each R independently represents a hydrogen atom or a monovalent organic radical selected from aliphatic radicals having from 1 to 8 carbon atoms and arylic or alicyclic radicals having from 3 to 8 carbon atoms; (ii) a non-functional fluorinated monomer [monomer (B)] having at least one ethylene unsaturation; and (iii) a fluorinated polyfunctional compound having the general formula: (CR1R2=CFCF2-O)a-Rf-((O)c-CF=CR3R4)b (ll) wherein: a is an integer equal to or larger than 1, preferably a is 1, 2, or 3; b is 0 or 1 and the sum of a and b is an integer equal to or larger than 2; c is 0 or 1; R1, R2, R3 and R4 are independently selected from F, H, alkyl, alkoxy, polyoxy alkyl, perfluoroalkyl, perfluoroalkoxy or perfluoropolyoxy alkyl, preferably F; and Rf represents a hydrocarbon or fluorocarbon group having at least two carbon atoms. The low-EW perfluorinated ionomers made of polymer (I) are adapted to be processed into thin films, which are found to have superior physical stability than the existing products and are thus well suited for low humidity or high temperature electrochemical applications. Moreover, these low-EW ionomers are melt processable and have limited loss of volatile substances at their melt processing temperatures.
Inventors:
MERLO LUCA (IT)
TORTELLI VITO (IT)
WLASSICS IVAN (IT)
OLDANI CLAUDIO (IT)
TORTELLI VITO (IT)
WLASSICS IVAN (IT)
OLDANI CLAUDIO (IT)
Application Number:
PCT/EP2013/065980
Publication Date:
February 13, 2014
Filing Date:
July 30, 2013
Export Citation:
Assignee:
SOLVAY SPECIALTY POLYMERS IT (IT)
International Classes:
C07C209/00; C08F216/14; C08J5/22
Foreign References:
| US5557010A | 1996-09-17 |
Other References:
DATABASE WPI Week 198814, Derwent World Patents Index; AN 1988-096387, XP002686310
Attorney, Agent or Firm:
BENVENUTI, Federica et al. (Rue de Ransbeek 310, Bruxelles, BE)
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