Claims
- 1. Polymers selected from the group consisting of homopolymers of perfluorodioxoles having the following formula: ##STR18## wherein: R.sub.F is a perfluoroalkyl radical having from 1 to 5 carbon atoms; and X.sub.1 and X.sub.2, equal or different from each other, are F or CF.sub.3, and copolymers of perfluorodioxoles of formula (I) with one or more comonomers having olefinic unsaturation.
- 2. Polymers according to claim 1, wherein the polymers are copolymers of perfluorodioxoles with a comonomer selected from the group consisting of tetrafluoroethylene, vinylidene fluoride, trifluoroethylene, perfluoropropene, Perfluoromethylvinylether, perfluoroethylvinylether, perfluoropropylvinylether, perfluoro-1,3-dioxole, perfluoro-(2,2-dimethyl)-1,3-dioxole, CF.sub.2 .dbd.CF--O--CF.sub.2 --CF.sub.2 --SO.sub.2 F, chlorotrifluoroethylene, vinyl chloride, methyl acrylate, methyl methacrylate, ethylene, and mixtures thereof.
- 3. Copolymers according to claim 2, wherein the comonomer is tetrafluoroethylene or vinyl fluoride.
- 4. Copolymers according to claim 1, wherein the perfluorodioxole of formula (I) is 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole.
- 5. Copolymers according to claim 2, wherein the perfluorodioxole of formula (I) is 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole.
- 6. Copolymers according to claim 3, wherein the perfluorodioxole of formula (I) is 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole.
Priority Claims (1)
Number |
Date |
Country |
Kind |
MI93A1445 |
Jul 1993 |
ITX |
|
Parent Case Info
This is a divisional of U.S. patent application Ser. No. 08/560,196, filed Nov. 21, 1995, now U.S. Pat. No. 5,571,932 which was a divisional of U.S. application Ser. No. 08/466,387, filed Jun. 6, 1995 now U.S. Pat. No. 5,495,028 which was a divisional of U.S. application Ser. No. 08/270,149, filed Jul. 1, 1994, now U.S. Pat. No. 5,498,682.
US Referenced Citations (24)
Foreign Referenced Citations (15)
Number |
Date |
Country |
073087 |
Mar 1983 |
EPX |
076581 |
Apr 1983 |
EPX |
080187 |
Jun 1983 |
EPX |
184459 |
Jun 1986 |
EPX |
185241 |
Jun 1986 |
EPX |
247379 |
Dec 1987 |
EPX |
0296559 |
Dec 1988 |
EPX |
460946 |
Dec 1991 |
EPX |
499158 |
Aug 1992 |
EPX |
0651862 |
Aug 1992 |
EPX |
0499157 |
Aug 1992 |
EPX |
0187764 |
May 1986 |
JPX |
1514700 |
Jun 1978 |
GBX |
WO9103472 |
Mar 1991 |
WOX |
WO9104251 |
Apr 1991 |
WOX |
Non-Patent Literature Citations (1)
Entry |
European Search Report dated Sep. 8, 1994 for EP 94 10 9782 with Annex. |
Divisions (3)
|
Number |
Date |
Country |
Parent |
560196 |
Nov 1995 |
|
Parent |
466387 |
Jun 1995 |
|
Parent |
270149 |
Jul 1994 |
|