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AssigneeAsahi Glass Company, Limited
InventorsHiroshi Ukihashi, Masaaki Yamabe, Haruhisa Miyake
Estimating the term…
Copolymers of tetrafluoroethylene and ethylene essentially consist of components of from 40 to 60 mole % of tetrafluoroethylene, 40 to 60 mole % of ethylene and 0.1 to 10 mole % of perfluoroalkyl vinyl component having the formula CH.sub.2 .dbd. CH--C.sub.n F.sub.2n + 1 wherein n is an integer of 2 to 10. Said copolymer has a volumetric flow rate of 10 to 500 mm.sup.3 /sec. defined in the specification. The copolymers of tetrafluoroethylene and ethylene are produced by copolymerizing tetrafluoroethylene and ethylene with a molar ratio of C.sub.2 F.sub.4 /C.sub.2 H.sub.4 being kept essentially higher than 40/60 in the reactor in the presence of a small amount of a perfluoroalkyl vinyl monomer having the formula CH.sub.2 .dbd. CH--C.sub.n F.sub.2 + 1 wherein n is an integer of 2 to 10. This is a continuation of application Ser. No. 689.526, filed May 24, 1976, now abandoned.
A terpolymer having a volumetric flow rate of 10 to 500 mm.sup.3 /sec. as determined at 300.degree. C under a load of 30 kg/cm.sup.2 containing mainly tetrafluoroethylene and ethylene which consists essentially of components of 40 to 60 mole % of tetrafluoroethylene, 40 to 60 mole % of ethylene and 0.1 to 10 mole % of perfluoroalkyl vinyl monomer having the formula
A process for producing a terpolymer having a volumetric flow rate of 10 to 500 mm.sup.3 /sec. containing mainly tetrafluoroethylene and ethylene and containing 0.1 to 10 mole % of a perfluoroalkyl vinyl component, which comprises:
Dependencies are inferred from the claim text.