Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shigeki Kobayashi0
Yasuhiko Matsuoka0
Shinya Higuchi0
Date of Patent
July 5, 2011
0Patent Application Number
128918670
Date Filed
September 28, 2010
0Patent Primary Examiner
Patent abstract
The present invention provides a method for producing a polytetrafluoroethylene fine powder, which comprises emulsion polymerizing tetrafluoroethylene in the presence of an aqueous medium, a fluorinated surfactant and a radical polymerization initiator to produce an aqueous polytetrafluoroethylene emulsion, mixing and coagulating the aqueous emulsion to separate a polytetrafluoroethylene fine powder, and then drying the polytetrafluoroethylene fine powder in a wet state in an atmosphere containing ammonia.
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