Perfluorodioxole and its polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorEdward N. Squire
Life of this patent
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Abstract
Perfluoro-1,3-dioxole is a useful monomer, which polymerizes to either amorphous or liquid homopolymers and copolymerizes with tetrafluoroethylene as well as with other monomers to both crystalline and amorphous copolymers having one or more such comonomers incorporated therein. Amorphous homopolymers and copolymers of perfluoro-1,3-dioxole are useful in such applications as glazing for reactors for hydrogen fluoride reactions. Amorphous homopolymers and amorphous or crystalline copolymers form self-supporting films and can be used for coatings and linings which are inert to most chemicals and are stain and weather resistant and as dielectrics for electrical and electronic equipment. Liquid homopolymers can be used as hydraulic fluids and heat exchange media.
Claims9
A copolymer of perfluoro-1,3-dioxole selected from the group consisting of dipolymers of perfluoro-1,3-dioxole with fluoroolefins and terpolymers of perfluoro-1,3-dioxole with tetrafluoroethylene and with another ethylenically unsaturated monomer.
A homopolymer of perfluoro-1,3-dioxole.
A copolymer of perfluoro-1,3-dioxole with a minor amount of tetrahydrofuran, which copolymer has a glass transition temperature in the range of about 84.degree.-92.degree. C.
Dependencies are inferred from the claim text.