Invention Grant
- Patent Title: Method of making fluoropolymer dispersion
- Patent Title (中): 制备含氟聚合物分散体的方法
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Application No.: US12684239Application Date: 2010-01-08
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Publication No.: US08222322B2Publication Date: 2012-07-17
- Inventor: Klaus Hintzer , Michael Jürgens , Harald Kaspar , Herbert Koenigsmann , Kai Helmut Lochhaas , Andreas R. Maurer , Werner Schwertfeger , Tilman Zipplies , Ludwig Mayer , Michael C Dadalas , George G. I. Moore , Jay F. Schulz , Richard M. Flynn
- Applicant: Klaus Hintzer , Michael Jürgens , Harald Kaspar , Herbert Koenigsmann , Kai Helmut Lochhaas , Andreas R. Maurer , Werner Schwertfeger , Tilman Zipplies , Ludwig Mayer , Michael C Dadalas , George G. I. Moore , Jay F. Schulz , Richard M. Flynn
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Julie A. Lapos-Kuchar
- Priority: GB0514387.0 20050715; GB0514398.7 20050715; GB0523853.0 20051124; GB0525978.3 20051221
- Main IPC: C08L1/00
- IPC: C08L1/00

Abstract:
A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula: [Rf—O-L-COO−]iXi+ (I) wherein L represents a linear fully fluorinated alkylene group, Rf represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; then adding one or more non-fluorinated surfactants selected from anionic and non-ionic surfactants followed by reducing the total amount of the one or more fluorinated surfactants to an amount of not more than 500 ppm, for example not more than 250 ppm based on the total weight of the dispersion while maintaining or increasing the amount of solids in the dispersion.
Public/Granted literature
- US20100113679A1 METHOD OF MAKING FLUOROPOLYMER DISPERSION Public/Granted day:2010-05-06
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