Process for preparing a terpolymer of tetrafluoroethylene, ethyl

Details Process for preparing a terpolymer of tetrafluoroethylene, ethyl Process for preparing a terpolymer of tetrafluoroethylene, ethyl

1986-04-01

1987-07-07

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526255, C08F 214

Patent

active

046788476

ABSTRACT:
The present invention relates to the process for preparing terpolymer of tetrafluoroethylene (TFE), ethylene (E), and a third monomer. According to the present invention, dicarbonate peroxide is used as initiator, 1,1,2-trichloro-1,2,2-trifluoro-ethane as the reaction medium and compounds of molecular formula C.sub.n R.sub.2n+2, wherein, n=0,1, or 2;R=H, Cl or F, are gaseous chain telomeric agents to control the average molecular weight of copolymers, the formula of third monomer is CF.sub.2 XCOCF.sub.2 X' or ##STR1## wherein X=X'=Cl or F, R.sub.1 =CF.sub.3 or CH.sub.3,R.sub.2 =CF.sub.3, CH.sub.3 or H, and R.sub.3 =H or F, usually the molar ratio of TFE to E is from 60:40 to 40:60 with the content of the third monomer being from 0.1% to 10%, based on the total molar amount of TFE and E.

REFERENCES:
patent: 2885448 (1959-05-01), Miller
patent: 4033939 (1977-07-01), Schulze
patent: 4123602 (1978-10-01), Ukihashi
patent: 4338237 (1982-07-01), Sulzbach
patent: 4521575 (1985-06-01), Nakagawa
patent: 4585306 (1986-04-01), Ohmori

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