Amorphous fluoropolymer containing perfluoro(ethyl vinyl ether)
AssigneeE. I. Du Pont de Nemours and Company
InventorsPaul Douglas Brothers, Richard Alan Morgan
Life of this patent
Estimating the term…
Abstract
Amorphous fluoropolymers contain tetrafluoroethylene and perfluoro(ethyl vinyl ether).
Claims14
An amorphous fluoropolymer selected from the group consisting of (a) dipolymer of copolymerized units of tetrafluoroethylene and perfluoro(ethyl vinyl ether), and (b) copolymer of polymerized units of tetrafluoroethylene and perfluoro(ethyl vinyl ether) and at least one additional fluorinated monomer present in a minor amount relative to the amount of said perfluoro(ethyl vinyl ether), with the proviso that when said additional monomer is perfluoro(methyl vinyl ether), the amount of said perfluoro(methyl vinyl ether) can exceed the amount of perfluoro(ethyl vinyl ether) present, with the amount of perfluro(ethyl vinyl ether) being at least 15 wt % of the combined weight of said perfluoro(ethyl vinyl ether) and perfluoro(methyl vinyl ether).
Dependencies are inferred from the claim text.