Claims
- 1. A water-wettable and water-insoluble at least 60% sulfonated copolymer of (A) a monomer of the formula
- Y--CH.dbd.CH--X
- wherein X is --COOH and Y is selected from the group consisting of hydrogen, methyl and ethyl and (B) a halogenated monomer of the formula ##STR5## wherein R is halogen and Y', Y" and Y'" are individually halogen with the proviso that at least one of the Y's is fluorine, and the sulfonic acid group is attached to the carbon atom .alpha. to the --COOH group, the ratio of B to A being 1:2.5 to 1:42.
- 2. The copolymer of claim 1 wherein the halogenated monomer is selected from the group consisting of tetrafluoroethylene, chlorotrifluoroethylene, bromotrifluoroethylene, vinylidenefluorine and hexafluoropropylene.
- 3. The polymer of claim 1 wherein the molecular weight of the polymer is between 2 .times. 10.sup.4 and 4 .times. 10.sup.6.
- 4. The copolymer of claim 1 wherein the halogenated monomer is tetrafluoroethylene and the co-monomer is acrylic acid.
- 5. The copolymer of claim 4 wherein the molar ratio between tetrafluoroethylene and acrylic acid is between 7:1 and 25:1.
- 6. The copolymer of claim 5 wherein the molar ratio between acrylic acid and sulfonic acid is between 1:0.6 and 1:1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
21810 A/75 |
Mar 1975 |
ITX |
|
Parent Case Info
This is a division of Ser. No. 632,056 filed Nov. 14, 1975 now U.S. Pat. No. 4,060,473.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1092645 |
Nov 1967 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Chem. Abst., 61, 16245(h), (1964). |
Divisions (1)
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Number |
Date |
Country |
Parent |
632056 |
Nov 1975 |
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