Title:
含フッ素エラストマーの製造方法
Document Type and Number:
Japanese Patent JP5578208
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.
Inventors:
Yoshiyuki Tanaka
Masaki Kitaichi
Tomizo Soda
Tatsuya Morikawa
Toshio Sogabe
Mitsuru Kishine
Masaki Kitaichi
Tomizo Soda
Tatsuya Morikawa
Toshio Sogabe
Mitsuru Kishine
Application Number:
JP2012178456A
Publication Date:
August 27, 2014
Filing Date:
August 10, 2012
Export Citation:
Assignee:
Daikin Industries, LTD.
International Classes:
C08F14/18; C08F2/00; C08F6/16; C08F6/22; C08F214/18; C08F214/22; C08F214/26
Attorney, Agent or Firm:
Patent business corporation Yasutomi international patent firm