PRODUCTION OF PERFLUOROCARBON POLYMER
Document Type and Number:
Japanese Patent JP3280727
PURPOSE: To readily obtain the subject polymer having a high ion exchange capacity in high yield by carrying out the emulsion copolymerization of a sulfonic acid type functional group-containing perfluorocarbon monomer with a perfluoroolefin in an aqueous medium according to a specific method.
CONSTITUTION: (A) A sulfonic acid type functional group-containing perfluorocarbon (preferably a monomer of the formula, etc.) and (B) a perfluoroolefin (preferably tetrafluoroethylene, etc.) are subjected to emulsion copolymerization in the presence of a fluorine-containing emulsifying agent (preferably C7H15CO2NH4, etc.) and a water-soluble organic solvent (preferably tertiary butanol) in an aqueous medium by the action of a polymerization initiation source (preferably benzoyl peroxide, etc.) to afford the objective copolymer. The reaction is preferably carried out at 20-80°C reactional temperature under 4-30kg/cm2 reactional pressure. Furthermore, the components (A) and (B) are used in amounts so as to provide 25-60wt.% copolymerization ratio of the component (A).
February 22, 2002
December 18, 1992
ASAHI GLASS CO LTD
C08F2/24; C08F14/18; C08F214/18; C08F214/26; C08F2/12; C08F14/00; C08F214/00; (IPC1-7): C08F214/18; C08F2/24