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US 4,675,452 AGranted
Perfluorinated polyether fluids
OwnerRichard J. Lagow, Daniel F. Persicoinventors
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Abstract
Perfluorinated polyethers comprising copolymers of hexafluoroacetone and epoxide and/or oxetanes are described. The perfluorinated polyethers are useful as lubricants.
Claims6
Perfluorinated hexafluoroacetone copolymers of the formula:
- ##STR34## wherein R.sub.f 1 and R.sub.f1, are F, CF.sub.3, C.sub.2 F.sub.5, C.sub.3 F.sub.7, C-C.sub.6 F.sub.5 or c-C.sub.6 F.sub.11 ;
- R.sub.f2, R.sub.f2 ', R.sub.f3 and R.sub.f4 are F, CF.sub.3 or C.sub.2 F.sub.5 ;
- R.sub.f3 '-R.sub.f6 ' if F or CF.sub.3 ;
- R.sub.fA is CFR.sub.f1 R.sub.f2 R.sub.f3 R.sub.f4, CFR.sub.f3 R.sub.f4, CFR.sub.1 'R.sub.f2 'CR.sub.f3 'R.sub.f4 'CR.sub.f5 'R.sub.f6 ', CFR.sub.f3 'R.sub.f4 'CR.sub.f5 'R.sub.f6 ' or CFR.sub.f5 'R.sub.f6 ';
- R.sub.fB is CF.sub.3, C.sub.2 F.sub.5 and C.sub.3 F.sub.7 ;
- and x and y are integers greater than 1 such that x+y=8-50.
3 more elements
Perfluorinated hexafluoroacetone/epoxide copolymers of the formula:
- ##STR35## wherein R.sub.f1 is F, CF.sub.3, C.sub.2 F.sub.5, C.sub.3 F.sub.7, c-C.sub.6 F.sub.5 or c-C.sub.6 F.sub.11 ;
- R.sub.f2, R.sub.f3 and R.sub.f4 are F, CF.sub.3 or C.sub.2 F.sub.5 ;
- R.sub.fA is CFR.sub.f1 R.sub.f2 CR.sub.f3 R.sub.f4 or CFR.sub.f3 R.sub.f4 ;
- R.sub.fB is CF.sub.3, C.sub.2 F.sub.5 or C.sub.3 F.sub.7 ;
- and n=8-50.
2 more elements
Perfluorinated hexafluoroacetone/ethylene oxide copolymer of the formula:
- ##STR36## wherein n=8-50.
Perfluorinated hexafluoroacetone/propylene oxide copolymer of the formula:
- ##STR37## wherein n=8-50.
Perfluorinated hexafluoroacetone/oxetane copolymer of the formula:
- ##STR38## wherein R.sub.f1 is F, CF.sub.3, C.sub.2 F.sub.5, C.sub.3 F.sub.7, c-C.sub.6 F.sub.5 or c-C.sub.6 F.sub.11 ;
- R.sub.f2 is CF.sub.3 or C.sub.2 F.sub.5 ;
- R.sub.f3 -R.sub.f6 is F or CF.sub.3 ;
- R.sub.fA is CFR.sub.f1 R.sub.f2 CR.sub.f3 R.sub.f4 CR.sub.f5 R.sub.f6, CFR.sub.f3 R.sub.f4 CR.sub.f5 R.sub.f6 or CFR.sub.f5 R.sub.f6 ;
- R.sub.fB is CR.sub.3, C.sub.2 F.sub.5 or C.sub.3 F.sub.7 :
- and n=8-50.
3 more elements
Perfluorinated hexafluoroacetone/oxetane copolymer of the formula:
- ##STR39## wherein n=8-50.
Dependencies are inferred from the claim text.