Sintered micro-powder of tetrafluoroethylene polymers

Details Sintered micro-powder of tetrafluoroethylene polymers Sintered micro-powder of tetrafluoroethylene polymers

1974-11-20

1976-04-27

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 4218, 260 4222, 260 4224, 260 4249, 260 92, 526250, 526253, 526255, 264 14, C08F 614, C08F 624

Patent

active

039534120

ABSTRACT:
Sintered micro-powder of tetrafluoroethylene polymer having an average particle size of 100 microns or less, a sphere factor of 1.2 or less, a specific gravity of 2.20 or less, and a weight loss on heating of 0.5 percent or less. The process for the preparation thereof comprising atomizing an aqueous dispersion containing 5 to 80 percent by weight of tetrafluoroethylene polymer particles having 0.05 to 0.5 micron average particle size into a gas at a temperature above the melting point of the tetrafluoroethylene polymer and recovering the sintered micro-powder.

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patent: 3528955 (1970-09-01), Lippman
patent: 3532782 (1970-10-01), Hartwimmer
patent: 3640984 (1972-02-01), Miller
patent: 3655611 (1972-04-01), Mueller et al.

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