Claims
- 1. A composition consisting essentially of
- (a) a melt-processible tetrafluoroethylene copolymer comprising recurring units of tetrafluoroethylene comonomer and recurring units of a comonomer represented by the formula ##STR2## wherein R is R.sub.f, --R'.sub.f --X, or O--R.sub.f or --O--R'.sub.f --X in which R.sub.f is a perfluoroalkyl radical of 1-12 carbon atoms, R'.sub.f is --(CF.sub.2).sub.n --, were n=1-12, or the same diradical containing ether oxygen; and X is H or Cl; and wherein said copolymer has been fluorinated by subjecting it to a fluorinating agent until the number of unstable end groups is less than 70 per 10.sup.6 carbon atoms; and
- (b) a conductive carbon black present in an amount of between 1 and 20 weight percent of the composition.
- 2. A composition consisting essentially of
- (a) a melt-processible tetrafluoroethylene copolymer comprising recurring units of tetrafluoroethylene comonomer and recurring units of a comonomer represented by the formula ##STR3## wherein R is R.sub.f, --R'.sub.f --X, or --O--R.sub.f or O--R'.sub.f --X in which R.sub.f is a perfluoroalkyl radical of 1-12 carbon atoms, R'.sub.f is --(CF.sub.2).sub.n --, where n=1-12, or the same diradical containing ether oxygen; and X is H or Cl; and wherein said copolymer has been fluorinated by subjecting it to a fluorinating agent until the number of unstable end groups is less than 6 per 10.sup.6 carbon atoms; and
- (b) a conductive carbon black present in an amount of between 1 and 20 weight percent of the composition.
- 3. A composition according to claim 1 wherein the comonomer is hexafluoropropylene.
- 4. A composition of claim 1 wherein the comonomer is perfluoro(propyl vinyl ether).
- 5. A composition of claim 1 wherein the comonomer is a mixture of hexafluoropropylene and perfluoro(alkyl vinyl ether).
- 6. A composition according to claim 1 wherein component (b) is present in an amount of between 1 and 6 weight percent of the composition.
- 7. A composition according to claim 2 wherein component (b) is present in an amount of between 1 and 6 weight percent of the composition.
- 8. A composition according to claim 1 wherein the fluorinating agent is fluorine gas.
- 9. A composition according to claim 2 wherein the fluorinating agent is fluorine gas.
- 10. A composition of claim 1 wherein the comonomer is a mixture of hexafluoropropylene and perfluoro (propyl vinyl ether).
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 169,993 filed March 18, 1988, which is a continuation-in-part of application Ser. No. 149,152 filed Jan. 27, 1988 which is a continuation-in-part of application Ser. No. 109,033 filed Oct. 16, 1987 now all abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4664846 |
Enjo et al. |
May 1987 |
|
4743658 |
Imbalzano et al. |
May 1988 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
1210974 |
Oct 1970 |
GBX |
Continuation in Parts (3)
|
Number |
Date |
Country |
Parent |
169993 |
Mar 1988 |
|
Parent |
149152 |
Jan 1988 |
|
Parent |
109033 |
Oct 1987 |
|