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US 4,431,786 AGranted
Novel fluorodioxoles and fluorodioxole polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorEdward N. Squire
Life of this patent
Estimating the term…
Abstract
Novel fluorodioxoles which may have Cl or F substituents in the 4 or 5 positions and have two F or CF.sub.3 substituents in the 2 position are useful monomers for the preparation of homopolymers and copolymers with tetrafluoroethylene and terpolymers with tetrafluoroethylene and vinylidene fluoride. The homopolymers are suitable for glazing materials, while copolymers are useful, among others, for corrosion-resistant seals, gaskets, and linings.
Claims9
A polymer of a fluorodioxole having the formula ##STR6## wherein Y is hydrogen or chlorine;
- Z is hydrogen, fluorine, or chlorine, or R is fluorine or the trifluoromethyl group;
- said polymer being a homopolymer, a copolymer with tetrafluoroethylene, or a terpolymer with tetrafluoroethylene and vinylidene fluoride;
- with the proviso that when at least one of Y and Z is chlorine, the polymer is not a homopolymer.
Dependencies are inferred from the claim text.