Agglomerate containing fibrous polytetrafluoroethylene

Details Agglomerate containing fibrous polytetrafluoroethylene Agglomerate containing fibrous polytetrafluoroethylene

1974-09-20

1976-11-23

Derrington, James H.

Compositions

Preservative agents

Anti-caking, separative or protective coatings or zones

106308M, 252384, 260 4227, C09K 322

Patent

active

039935841

ABSTRACT:
A coherent, weak agglomerated dustless solid particulate mass is formed from a mixture of discrete particles in the size range from less than about 1 micron to about 2,000 microns, and fibrillatable polytetrafluoroethylene (hereinafter referred to as PTFE) in an amount from about 0.02, but less than 1 percent and preferably less than 0.75 percent by weight based on total solids, by working the mixture in a dry or relatively dry state with a working action in an unconfined zone at a temperature in excess of 20.degree. C., but below the sintering temperature of PTFE or a temperature deleterious to said particles, whichever is lower, without changing the primary particle size range of the material.

REFERENCES:
patent: 3455749 (1969-07-01), Gow
patent: 3466204 (1969-09-01), Gow
patent: 3838092 (1974-09-01), Vogt et al.

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