Invention Grant
- Patent Title: Method for producing polytetrafluoroethylene fine powder
- Patent Title (中): 生产聚四氟乙烯细粉的方法
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Application No.: US12891867Application Date: 2010-09-28
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Publication No.: US07973127B2Publication Date: 2011-07-05
- Inventor: Shinya Higuchi , Yasuhiko Matsuoka , Shigeki Kobayashi
- Applicant: Shinya Higuchi , Yasuhiko Matsuoka , Shigeki Kobayashi
- Applicant Address: JP Tokyo
- Assignee: Asahi Glass Company, Limited
- Current Assignee: Asahi Glass Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2008-104307 20080414
- Main IPC: C08G63/02
- IPC: C08G63/02 ; C08G63/00
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.
Public/Granted literature
- US20110021728A1 METHOD FOR PRODUCING POLYTETRAFLUOROETHYLENE FINE POWDER Public/Granted day:2011-01-27
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