Process for polymerizing tetrafluoroethylene in aqueous dispersi

Details Process for polymerizing tetrafluoroethylene in aqueous dispersi Process for polymerizing tetrafluoroethylene in aqueous dispersi

1976-03-24

1977-04-05

Wong, Jr., Harry

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526255, C08F 1426

Patent

active

040163458

ABSTRACT:
Polytetrafluoroethylene resin, coagulated after aqueous dispersion polymerization, having a fibrillatable character that is observable under high magnification and is manifested by high stretchability and long stress relaxation time under given conditions, is obtained by the aqueous dispersion technique, but with the polymerization initiator and its concentration, and the method of charging the initiator to the aqueous polymerization medium, and the temperature of polymerization being controlled to produce the resin. The resin is useful in applications served by earlier polytetrafluoroethylenes that have been coagulated from aqueous dispersion polymerization and is especially useful where processing conditions require shear or stretching.

REFERENCES:
patent: 2393967 (1946-02-01), Brubaker
patent: 2612484 (1952-09-01), Bankoff
patent: 2750350 (1956-06-01), Kroll
patent: 3142665 (1964-07-01), Cardinal et al.
patent: 3752796 (1973-08-01), Mueller et al.

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