Fluorinated polymer and use thereof in the preparation of hydrophilic membranes (vi)
US-2015375181-A1 · Dec 31, 2015 · US
Process for the treatment of sulfonyl fluoride polymers
US8940846B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8940846-B2 |
| Application number | US-201113704335-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 22, 2011 |
| Priority date | Jul 1, 2010 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
Official abstract text for this publication.
A process for reducing the amount of soluble polymeric fractions in a sulfonyl fluoride polymer. The process comprises contacting the sulfonyl fluoride polymer with a fluorinated fluid followed by separation of the polymer from the fluid. The fluorinated fluid is selected from hydrofluoroethers and hydrofluoropolyethers. The invention further relates to sulfonyl fluoride polymers obtainable by the process and having a heat of fusion not exceeding 4 J/g and containing less than 15% by weight of polymeric fractions having an average content of monomeric units comprising a sulfonyl functional group exceeding 24 mole %. The sulfonyl fluoride polymers so obtained are particularly suitable for the preparation of ionomeric membranes for use in electrochemical devices.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sulfonyl fluoride polymer having a heat of fusion not exceeding 4 J/g, measured according to ASTM 3418-08, wherein less than 15% by weight of the sulfonyl fluoride polymer comprises polymeric fractions in which greater than 24 mole % of such polymer fractions comprise monomeric units having at least one sulfonyl fluoride group. 2. The sulfonyl fluoride polymer according to claim 1 wherein less than 10% by weight of the sulfonyl fluoride polymer comprises polymeric fractions in which greater than 25 mole % of such polymer fractions comprise monomeric units having at least one sulfonyl fluoride group. 3. The sulfonyl fluoride polymer according to claim 1 having a heat of fusion not exceeding 3 J/g. 4. The sulfonyl fluoride polymer according to claim 1 which comprises recurring units derived from CF 2 ═CFOCF 2 CF 2 —SO 2 F and tetrafluoroethylene. 5. A film or membrane comprising the sulfonyl fluoride polymer of clam 1 . 6. A film or membrane comprising the sulfonyl fluoride polymer of claim 1 in acid and/or salified form. 7. The film or membrane of claim 6 having a loss of weight after treatment in water at 100° C. for 96 hours of less than 10%.
Assignees
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Classifications
Manufacture of films or sheets · CPC title
Organic polymers · CPC title
on to polymers of unsaturated ethers · CPC title
Monomers containing fluorine not covered by the groups C08F214/20 - C08F214/28 · CPC title
Polysulfones; Polyethersulfones · CPC title
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- What does patent US8940846B2 cover?
- A process for reducing the amount of soluble polymeric fractions in a sulfonyl fluoride polymer. The process comprises contacting the sulfonyl fluoride polymer with a fluorinated fluid followed by separation of the polymer from the fluid. The fluorinated fluid is selected from hydrofluoroethers and hydrofluoropolyethers. The invention further relates to sulfonyl fluoride polymers obtainable by …
- Who is the assignee on this patent?
- Merlo Luca, Veneroni Alessandro, Pagano Elvira, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification B01D71/32. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).