Process for working up aqueous dispersions of fluorinated thermo

Details Process for working up aqueous dispersions of fluorinated thermo Process for working up aqueous dispersions of fluorinated thermo

1993-10-06

1995-10-31

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528499, 528501, 528502C, C08F 616

Patent

active

054630215

ABSTRACT:
The aqueous dispersions from the polymerization of fluorinated thermoplastics can be worked up to a high value product (e.g., substantially purified of cations resulting from the polymerization) in a continuous manner, if the cations are first removed from the aqueous dispersion, the dispersion is then compressed and decompressed through small openings, thereby being coagulated, the coagulated phase is washed on a filter and partially dewatered, subsequently broken up to give a free-flowing product and this is dried to the desired residual moisture content. Qualitatively high value products, which can be directly fed to a melt extruder, are thus obtained with high throughputs.

REFERENCES:
patent: 2593583 (1952-04-01), Lontz
patent: 3046263 (1962-07-01), Whitlock

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