Title:
フルオロモノマーの回収方法
Document Type and Number:
Japanese Patent JP5332617
Kind Code:
B2
Abstract:
The invention provides a technique enabling the separation and recovery of an unreacted fluoromonomer from an aqueous fluoropolymer dispersion obtained by emulsion polymerization, without using any extraction solvent, and enabling the prevention of a hydrolysis of —SO2F and a like sulfonic acid precursor functional group convertible to sulfonic acid group. Thus, the invention provides a recovering method fluoromonomer having a sulfonic acid precursor functional group convertible to a sulfonic acid group and remaining unreacted from an aqueous fluoropolymer dispersion obtained by emulsion polymerization of the fluoromonomer, wherein the unreacted fluoromonomer is recovered from the aqueous fluoropolymer dispersion by evaporation, wherein the aqueous fluoropolymer dispersion has an acidic pH.
Inventors:
Tadaharu Isaka
Tadashi Ino
Nakazawa Masaharu
Masahiro Kondo
Tadashi Ino
Nakazawa Masaharu
Masahiro Kondo
Application Number:
JP2008548345A
Publication Date:
November 06, 2013
Filing Date:
December 07, 2007
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
C08F6/14; C08F14/18; C08F16/30
Domestic Patent References:
| JPH0632816A | 1994-02-08 | |||
| JP2001226436A | 2001-08-21 | |||
| JP2001064317A | 2001-03-13 | |||
| JPH08500628A | 1996-01-23 | |||
| JP2000344825A | 2000-12-12 | |||
| JPH07118332A | 1995-05-09 | |||
| JPH1135624A | 1999-02-09 |
Attorney, Agent or Firm:
Atomi International Patent Office