Claims
- 1. A linear fluorocarbon triazine polymer consisting essentially of recurring units having the following formula: ##STR5## in which R.sub.f is --(CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.3 CH.sub.2 O(CF.sub.2).sub.4 -- or --(CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.4 OCH.sub.2 -- (CF.sub.2).sub.3 CH.sub.2 O(CF.sub.2).sub.4 CH.sub.2 O(CF.sub.2).sub.4 --; R.sub.f ' is a perfluoroalkyl radical containing 1 to 12, inclusive, carbon atoms; and n is an integer equal to the number of recurring units.
- 2. The fluorocarbon triazine polymer according to claim 1 in which R.sub.f is --CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.3 CH.sub.2 O(CF.sub.2).sub.4 CH.sub.2 O(CF.sub.2).sub.4 --.
- 3. The fluorocarbon triazine polymer according to claim 1 in which R.sub.f is --CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.3 CH.sub.2 O(CF.sub.2).sub.4 --.
- 4. A process for preparing a fluorocarbon triazine polymer which comprises the steps of:
- a. reacting stoichiometric amounts of (1) a fluorocarbon dinitrile having the formula N.tbd.CR.sub.f C.tbd.N, (2) a silver compound having the formula ##STR6## and (3) ammonia, R.sub.f being a perfluoroalkylene or perfluoroalkylene ether group and Rhd f' being a perfluoroalkyl radical;
- b. recovering from step (a) a silver coordinated polymer having the following formula: ##STR7## where R.sub.f is as indicated above and n ranges from about 10 to 100; c. reacting the silver coordinated polymer with a molar excess of a fluorocarbon acid anhydride having the formula ##STR8## where R.sub.f " is a perfluoroalkyl radical; and d. recovering from step c a fluorocarbon triazine polymer having the following formula: ##STR9## where R.sub.f, R.sub.f " and n are as indicated above.
- 5. The process according to claim 4 in which step (a) is conducted at about room temperature for a period ranging from about 2 to 10 hours in an ether or fluorohydrocarbon solvent and step (c) is conducted at about room temperature for a period ranging from about 1 to 3 hours.
- 6. The process according to claim 4 in which an excess of ammonia ranging from about 1.5 to 2.0 moles per mole of the silver compound is used in step (a); and about 1.5 to 2.0 moles of the fluorocarbon acid anhydride per mole of the silver coordinated polymer are reacted in step (c).
- 7. The process according to claim 6 in which R.sub.f is --CF.sub.2 --.sub.m, where m is an integer ranging from 3 to 15, inclusive; --CF.sub.2 O(CF.sub.2).sub.2 OCF.sub.2 --; --CF(CF.sub.3)[OCF.sub.2 CF(CF.sub.3)].sub.x O(CF.sub.2).sub.5 O[CF(CF.sub.3)CF.sub.2 O].sub.y CF(CF.sub.3)--, where (x+y) equals zero to 25, inclusive; --CF.sub.2 (OCF.sub.2 CF.sub.2).sub.a O(CF.sub.2).sub.5 O(CF.sub.2 CF.sub.2 O).sub.b CF.sub.2 --, where (a+b) equals 2 to 7, inclusive; --(CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.3 CH.sub.2 O(CF.sub.2).sub.4 --; --(CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.4 OCH.sub.2 (CF.sub.2).sub.3 CH.sub.2 O(CF.sub.2).sub.4 CH.sub.2 O(CF.sub.2).sub.4 --; or --[CF(CF.sub.3)-- [OCF.sub.2 CF(CF.sub.3)].sub.x O(CF.sub.2).sub.5 O[CF(CF.sub.3).sub.2 CF.sub.2 O].sub.y CF(CF.sub.3).sub.2 O, where (x+y) equals zero to 25, inclusive; and R.sub.f ' and R.sub.f " are perfluoroalkyl radicals containing 1 to 12, inclusive, carbon atoms.
RIGHTS OF THE GOVERNMENT
The invention described herein may be manufactured and used by or for the Government of the United States for all governmental purposes without the payment of any royalty.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3317484 |
Fritz et al. |
May 1967 |
|
3644300 |
Dorfman et al. |
Feb 1972 |
|
3960814 |
Cochoy |
Jun 1976 |
|