Process for producing propylene-tetrafluoroethylene copolymer

Details Process for producing propylene-tetrafluoroethylene copolymer Process for producing propylene-tetrafluoroethylene copolymer

1982-03-15

1984-07-31

Henderson, C. A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526255, 526915, C08F 226, C08F 440

Patent

active

044631448

ABSTRACT:
A propylene-tetrafluoroethylene copolymer is produced by copolymerizing propylene and tetrafluoroethylene in a molar ratio ranging from 95/5 to 40/60 in an aqueous medium containing tertiary butanol ranging from 5 to 30 wt.%, an emulsifier ranging from 0.01 to 10 wt.% and a redox catalyst of a combination of (1) a water soluble persulfate, (2) a water soluble iron salt, (3) a hydroxymethanesulfinate and (4) ethylenediaminetetraacetic acid or a salt thereof at pH of 8 to 10.5 and at a temperature of 0.degree. to 50.degree. C.

REFERENCES:
patent: 3337515 (1967-08-01), La Heij
patent: 3403137 (1968-09-01), Anderson
patent: 3467635 (1969-09-01), Brasen
patent: 4277586 (1981-07-01), Ukihashi

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