Continuous process for preparing polytetrafluoroethylene wet pow

Details Continuous process for preparing polytetrafluoroethylene wet pow Continuous process for preparing polytetrafluoroethylene wet pow

1993-10-12

1999-11-02

Wu, David W.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528498, C08F 614, C08J 305

Patent

active

059772956

ABSTRACT:
A process for continuously preparing a wet powder of PTFE, comprising the step of continuously slurrying a PTFE aqueous dispersion with a high shear machine having a rotating element, and the step of continuously granulating the slurry by using vertical agitator. The process can be carried out for a long time without trouble, and can continuously provide a dry powder having good powder properties. The powder properties can be controlled by regulating operation conditions.

REFERENCES:
patent: 3046263 (1962-07-01), Whitlock
patent: 4123606 (1978-10-01), Malhotra
patent: 4439385 (1984-03-01), Kuhlos et al.
patent: 4713443 (1987-12-01), Nakashima

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