Claims
- 1. A process for forming a copolymer comprising,co-polymerizing, in aqueous emulsion vinylidene fluoride, with a functionalized fluorinated comonomer comprising sulfonyl fluoride or carboxylic acid ester groups, said comonomer being substantially insoluble in water and being dispersed in the form of droplets of a size of 0.5 microns or less, said polymerization process being conducted in the presence of a fluorinated surfactant and a free-radical initiator.
- 2. The process of claim 1 wherein the comonomer is perfluoro-2-(2-fluorosulfonylethoxy)propyl vinyl ether.
- 3. The process of claim 1 wherein the copolymer is subsequently melt processed into a film or sheet form.
- 4. The process of claim 1 wherein the copolymer is subsequently hydrolyzed using a basic solution to provide the alkali metal cationic form of the ionomer.
- 5. A copolymer made by the process of claim 1.
Parent Case Info
This application claims benefit of application Ser. No. 60/122,354 filed Mar. 2, 1999.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/US00/05526 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/52060 |
9/8/2000 |
WO |
A |
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5608022 |
Nakayama et al. |
Mar 1997 |
A |
6025092 |
Doyle |
Feb 2000 |
A |
Foreign Referenced Citations (2)
Number |
Date |
Country |
62288617 |
Dec 1987 |
JP |
WO 9403503 |
Feb 1994 |
WO |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/122354 |
Mar 1999 |
US |