GRANULAR FILLED POLYTETRAFLUOROETHYLENE AND PROCESS FOR PRODUCING THE SAME

WIPO Patent Application WO/2001/051560

A1

A granular polytetrafluoroethylene which contains a static-free filler and is obtained by stirring in water a mixture comprising 98 to 50 wt.% polytetrafluoroethylene powder having an average particle diameter of 120 $g(m)m or smaller and 2 to 50 wt.% filler having water repellency imparted thereto by treatment with a phenylsilane coupling agent, in the presence of an organic liquid which forms a liquid/liquid interface with water and of a silicone compound and a surfactant, to granulate the mixture. The granular filled PTFE has a high apparent density, a small average particle diameter, a narrow particle size distribution, excellent powder flowability, and a small charge amount and gives a large molding extremely reduced in coloration.

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SUKEGAWA MASAMICHI (JP)
ASANO MICHIO (JP)

PCT/JP2000/009284

July 19, 2001

December 27, 2000

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DAIKIN IND LTD (JP)
SUKEGAWA MASAMICHI (JP)
ASANO MICHIO (JP)

C08J3/205; C08K9/06; (IPC1-7): C08L27/18; C08J3/12; C08K9/06

EP0454043A2	1991-10-30
EP0969035A1	2000-01-05
EP0432718A1	1991-06-19
EP0980887A1	2000-02-23
US3915916A	1975-10-28

Asahina, Sohta (Tanimachi 2-chome Chuo-ku Osaka-shi Osaka, JP)

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