FLUOROCOPOLYMER AND ITS PRODUCTION

摘要

PURPOSE:To obtain the title copolymer having a low oligomer content and improved mechanical strengths by copolymerizing tetrafluoroethylene with a fluoro vinyl ether. CONSTITUTION:90-99.5mol% tetrafluoroethylene is copolymerized with 10-0.5mol% fluorinated vinyl ether of the general formula: CF2=CFORf (wherein Rf is a halohydrocarbon group) and a shortstop is added to the reaction mixture. An unreacted monomer is removed from the mixture to obtain a fluorocopolymer having a specific melt viscosity of 10<2>-10<7>P as measured at 372 deg.C and a weight loss of 0.01wt.% or below when extracted with a fluoroorganic solvent.