Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole
AssigneeE. I. Du Pont de Nemours and Company
InventorEdward N. Squire
Life of this patent
Estimating the term…
Abstract
Articles made from amorphous dipolymers of perfluoro-2,2-dimethyl-1,3-dioxole with tetrafluoroethylene having high glass transition temperatures of 140.degree. C. or higher, low indices of refraction, and good physical properties, and low dielectric constants, include, among others, substrates for circuit boards, composites, sheets and films, optical lenses, and electronic current carrying devices.
Claims2
An article for handling or processing of fluids selected from the group consisting of pipes, tubings, fittings, pump housings, pump impellers, valve bodies, valve stems, valve seals, diaphragms, tanks, trays, pipettes, and laboratory vessels, wherein at least one of the surfaces coming in contact with fluids is made of an amorphous dipolymer of 65-99 mole % of perfluoro-2,2-dimethyl-1,3-dioxide with a complementary amount of tetrafluoroethylene, the glass transition temperature of the dipolymer beings at least 140.degree. C.
A container or component of a conveying system suitable for holding or transporting articles in contact with a corrosive fluid selected from the group consisting of baskets, guide rails, conveyer belt links, bearings and rollers, clamps, racks, hooks, positioning pins, robot arm jaws and fingers, gears, and cams, said container or component being made of an amorphous dipolymer of 65-99 mole % of perfluoro-2,2-dimethyl-1,3-dioxole with a complementary amount of tetrafluoroethylene, the glass transition temperature of the dipolymer being at least 140.degree. C.
Dependencies are inferred from the claim text.