To provide an inexpensive, functional fluoropolymer material which is excellent in heat resistance, chemical resistance, physicochemical functions and durability and offers a high design freedom of various characteristics, and its preparation method.
The functional fluoropolymer material has a main chain which contains a fluoropolymer and a graft chain which comprises a perfluorovinyl monomer unit and has a sulfonic acid group at its end. In the preparation method of the functional fluoropolymer material, a perfluorovinyl monomer is grafted to the fluoropolymer, a fluoroalkyl halogen moiety represented by the formula: Rf-X (wherein Rf is a fluoroalkyl group; and X is at least one halogen other than fluorine) at the end of the graft chain is treated with a sulfite compound, sulfur oxide or bisulfide to convert the fluoroalkyl halogen moiety into a moiety represented by the formula: Rf-Y (wherein Rf is a fluoroalkyl group; and Y is a sulfinic acid group), and the fluoropolymer is subsequently reacted with an oxidizer to convert the sulfinic acid group into a sulfonic acid group.
WASHIO MASAICHI
KATSUMURA YASUSUKE
| JPH10130341A | 1998-05-19 | |||
| JP2002105216A | 2002-04-10 | |||
| JP2003261697A | 2003-09-19 | |||
| JP2004051685A | 2004-02-19 | |||
| JP2001048923A | 2001-02-20 | |||
| JP2004235146A | 2004-08-19 |
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Tatsuo Tomizu
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