Title:
含フッ素エラストマーの製造方法
Document Type and Number:
Japanese Patent JP5527934
Kind Code:
B2
Abstract:
The present invention concerns a method for preparing a fluorine-containing elastomer, characterized in that any one of the following methods (1) to (8) or by combining two or more thereof are carried out:
(1) a metal compound is not blended during emulsion-polymerization of a fluorine-containing monomer,
(2) at least one of materials (excluding a gaseous monomer for polymerization) which are used for polymerization of a fluorine-containing monomer, coagulation and drying contains substantially no metal component,
(3) emulsion-polymerization of the fluorine-containing elastomer is carried out while maintaining an emulsion in a weak alkaline state,
(4) coagulation is carried out after an emulsified dispersion of the fluorine-containing elastomer is filtrated to remove contaminants,
(5) coagulation of an emulsified dispersion of the fluorine-containing elastomer is carried out by using an acid containing no metal element,
(6) to a fluorine-containing elastomer containing water obtained by coagulation of an emulsified dispersion of the fluorine-containing elastomer is added a non-water-soluble solvent which has compatibility with the fluorine-containing elastomer containing water and contains no metal element to separate the water therefrom,
(7) a clean gas is used for drying a fluorine-containing elastomer containing water obtained by coagulation of an emulsified dispersion of the fluorine-containing elastomer or, a coagulated elastomer obtained by adding, to the fluorine-containing elastomer containing water, a non-water-soluble solvent having compatibility therewith and containing no metal element to separate the water therefrom, and
(8) a vessel laminated with a fluorine-containing resin film or polyethylene film on its part coming into contact with the coagulated elastomer, a vessel made of a fluorine-containing resin or a vessel made of polyethylene resin is used,
and said fluorine-containing elastomer has a metal content of not more than 50 ppm.
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Inventors:
Yoshiyuki Tanaka
Kitaichi Masaki
Ryosuke Sota
Tatsuya Morikawa
Toshio Sokabe
Kishine Mitsuru
Kitaichi Masaki
Ryosuke Sota
Tatsuya Morikawa
Toshio Sokabe
Kishine Mitsuru
Application Number:
JP2008000487A
Publication Date:
June 25, 2014
Filing Date:
January 07, 2008
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
C08F14/18; C08F2/00; C08F6/16; C08F6/22; C08F214/18; C08F214/22; C08F214/26; C09K3/10
Domestic Patent References:
| JP9500163A | ||||
| JP6386742A | ||||
| JP5529519A | ||||
| JP481609B2 | ||||
| JP7508779A | ||||
| JP7179508A | ||||
| JP1017729A |
Foreign References:
| WO1997008239A1 |
Attorney, Agent or Firm:
Atomi International Patent Office