Invention Grant
- Patent Title: Method for purification of aqueous fluoropolymer emulsions, purified emulsions, and fluorine-containing finished articles
- Patent Title (中): 纯化含氟聚合物乳液，纯化乳液和含氟成品的方法
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Application No.: US10536432Application Date: 2003-10-06
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Publication No.: US07468403B2Publication Date: 2008-12-23
- Inventor: Yasukazu Nakatani , Kenji Ichikawa
- Applicant: Yasukazu Nakatani , Kenji Ichikawa
- Applicant Address: JP Osaka
- Assignee: Daikin Industries, Ltd.
- Current Assignee: Daikin Industries, Ltd.
- Current Assignee Address: JP Osaka
- Agency: Sughrue Mion, PLLC
- Priority: JP2002-348970 20021129
- International Application: PCT/JP03/12752 WO 20031006
- International Announcement: WO2004/050719 WO 20040617
- Main IPC: C08L1/00
- IPC: C08L1/00
Abstract:
The present invention provides a method of purifying an aqueous fluoropolymer emulsion by which fluorine-containing surfactants can be removed without lowering the dispersibility of the aqueous fluoropolymer dispersions.The present invention provides a method of purifying an aqueous fluoropolymer emulsion comprising; purifying an aqueous fluoropolymer emulsion by a specific technique of concentrationwherein the aqueous fluoropolymer emulsion comprises a fluoropolymer and a fluorine-containing surfactant,said specific technique of concentration comprises concentration by phase separation, electric concentration and/or ion exchange concentration, andsaid concentration by phase separation, electric concentration and/or ion exchange concentration is carried out for removing the fluorine-containing surfactant.
Public/Granted literature
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