发明授权
- 专利标题： Process for producing aqueous polytetrafluoroethylene dispersion for coagulation processing, and aqueous polytetrafluoroethylene dispersion for coagulation processing
- 专利标题（中）： 用于凝结处理的聚四氟乙烯水分散体的制造方法以及凝聚处理用聚四氟乙烯分散液
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申请号： US13370988申请日： 2012-02-10
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公开(公告)号： US08461230B2公开(公告)日： 2013-06-11
- 发明人: Jun Hoshikawa , Junko Haga , Yasuhiko Matsuoka
- 申请人： Jun Hoshikawa , Junko Haga , Yasuhiko Matsuoka
- 申请人地址： JP Tokyo
- 专利权人： Asahi Glass Company, Limited
- 当前专利权人： Asahi Glass Company, Limited
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2009-239354 20091016
- 主分类号： C08C1/08
- IPC分类号： C08C1/08
摘要：
This invention provide an aqueous PTFE dispersion and a process for efficiently producing the aqueous PTFE dispersion for coagulation processing having excellent coagulation properties of PTFE microparticles. The process involves adding a synthetic adsorbent, having a specific surface area of from 100 to 2,000 m2/g, to an aqueous PTFE dispersion containing both PTFE microparticles, having an average particle size of from 0.10 to 0.50 μm, and a nonionic surfactant, followed by stirring or shaking and then separation into a liquid phase and a solid phase, and recovering an aqueous PTFE dispersion which contains from 45 to 70 mass % of PTFE microparticles having an average particle size of from 0.10 to 0.50 μm and from 1.4 to 2.1 mass %, based on the mass of the PTFE microparticles, of a nonionic surfactant.
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