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US 4,363,898 AGranted
Perfluorodiglycidyl ethers
AssigneeE. I. Du Pont de Nemours and Company
InventorsCarl G. Krespan, Thomas R. Darling
Life of this patent
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Abstract
Perfluoroglycidyl ethers of the formula ##STR1## are prepared by epoxidation of a perfluorodiallyl ether of the formula: CF.sub.2 .dbd.CFCF.sub.2 OR.sub.F. The glycidyl ethers are useful as monomers for preparing polymers which provide crosslinking or cure sites and are stable elastomeric materials useful as sealants, caulks, and fabricated objects.
Claims9
A homopolymer of a perfluoroglycidylether of the formula ##STR33## wherein R.sub.F is:
- ##STR34## wherein R.sup.1 is a carbon-carbon bond or a linear or branched perfluoroalkylene group of 1 to 12 carbon atoms;
- ##STR35## Y and Y' are --F or --CF.sub.3, provided that only one of Y and Y' can be --CF.sub.3 ;
- or ##STR36## wherein R.sup.3 is a linear or branched perfluoroalkylene group of carbon content such that the moiety ##STR37## does not exceed 15 carbon atoms;
- Y, independently, is --F or --CF.sub.3 ;
- n is 1 to 4;
- and Q is as defined above.
3 more elements
A copolymer of a perfluoroglycidyl ether of the formula ##STR38## wherein R.sub.F is:
- ##STR39## wherein R.sup.1 is a carbon-carbon bond or a linear or branched perfluoroalkylene group of 1 to 12 carbon atoms;
- ##STR40## Y and Y' are --F or --CF.sub.3, provided that only one of Y and Y' can be --CF.sub.3 ;
- or ##STR41## wherein R.sup.3 is a linear or branched perfluoroalkylene group of carbon content such that the moiety ##STR42## does not exceed 15 carbon atoms;
- Y, independently, is --F or --CF.sub.3 ;
- n is 1 to 4;
- and Q is as defined above and at least one comonomer selected from the group consisting of hexafluoropropylene oxide, tetrafluoroethylene oxide, a different perfluoroglycidyl ether from the class of perfluoroglycidyl ethers described above and a perfluoroglycidyl ether of the formula ##STR43## wherein R.sup.1 is:
- ##STR44## wherein R.sup.1 is a carbon-carbon bond or a linear or branched perfluoroalkylene group of 1 to 12 carbon atoms;
- Q.sup.1 is --SO.sub.2 F, --COF, --F, --Cl, --Br, --I, --CN, --CO.sub.2 H, --OC.sub.6 F.sub.5, or --CO.sub.2 R.sup.4 where R.sup.4 is --CH.sub.3 or --C.sub.2 H.sub.5 ;
- Y and Y' are --F or --CF.sub.3, provided that only one of Y and Y' can be --CF.sub.3 ;
- or
- (ii) --CF(R.sup.2).sub.2 wherein R.sup.2 is --F, --CF.sub.2 Cl, --CF.sub.2 CN, --CF.sub.2 COF, --CF.sub.2 CO.sub.2 H, --CF.sub.2 OCF(CF.sub.3).sub.2 or --CF.sub.2 CO.sub.2 R.sup.4 where R.sup.4 is defined as above;
- or ##STR45## wherein R.sup.3 is a linear or branched perfluoroalkylene group of carbon content such that the moiety ##STR46## does not exceed 15 carbon atoms;
- Y independently is --F or --CF.sub.3 ;
- n is 1 to 4;
- l and Q.sup.1 is as defined above;
- or
- (iv) --C.sub.6 F.sub.5.
14 more elements
Dependencies are inferred from the claim text.