Process for preparing fluorine-containing polymer

Abstract

There is provided the process for effectively preparing the fluorine-containing polymer without using CFC and HCFC which have a high polymerization rate and a high ozone depletion potential and a coating film having excellent mechanical properties, solvent resistance and chemical resistance can be formed using the obtained fluorine-containing polymer. In preparing the fluorine-containing polymer by polymerizing a monomer containing a fluoroolefin in a polymerization medium, the fluorine-containing solvent having an ozone depletion potential of 0 and a solubility of hydroxybutyl vinyl ether of not less than 0.5% is used as the polymerization medium.

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       7 . A process for preparing a fluorine-containing polymer by suspension polymerizing a monomer containing a fluoroolefin in a polymerization medium, wherein said polymerization medium is CF 3 CH 2 CHF 2  or CF 3 CH 2 CF 2 CH 3 .  
   
   
       8 . The process for preparation of  claim 7 , wherein said monomer is a monomer mixture further containing a hydrocarbon monomer.  
   
   
       9 . The process for preparation of  claim 7 , wherein said monomer is a monomer mixture further containing a hydrocarbon monomer having functional group.  
   
   
       10 . The process for preparation of  claim 9 , wherein said hydrocarbon monomer having functional group is hydroxybutyl vinyl ether.