Process for producing tetrafluoroethylene/hexafluoropropylene co

Details Process for producing tetrafluoroethylene/hexafluoropropylene co Process for producing tetrafluoroethylene/hexafluoropropylene co

1977-02-11

1978-08-08

Wong, Jr., Harry

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260900, 526254, C08F21426

Patent

active

041057163

ABSTRACT:
A process for producing tetrafluoroethylene/hexafluoropropylene copolymer having a hexafluoropropylene content of 8 to 20% by weight and having an excellent stress-cracking resistance and also excellent heat resistance, molding properties, chemical resistance and electrical characteristics, which comprises polymerizing tetrafluoroethylene monomer and hexafluoropropylene monomer in the presence of a polymerization initiator, wherein the tetrafluoroethylene monomer is used in a large amount at the first stage of the polymerization reaction and thereafter the polymerization reaction is continued in a smaller amount of the tetrafluoroethylene monomer.

REFERENCES:
patent: B564902 (1976-03-01), Roura
patent: 2549935 (1951-04-01), Sauer
patent: 2598283 (1952-05-01), Miller
patent: 2938889 (1960-05-01), Krespan
patent: 2946763 (1960-07-01), Bro et al.
patent: 3864322 (1975-02-01), Yallourakis
patent: 3969435 (1976-07-01), Bailey et al.

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