AQUEOUS PROCESS FOR MAKING IMPROVED TETRAFLUOROETHYLENE / FLUOROALKYL PERFLUOROVINYL ETHER COPOLYMERS
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Abstract
TOUGH, STABLE COPOLYMERS OF TETRAFLUOROETHYLENE MONOMER AND FLUOROVINYL ETHER MONOMERS CAN BE PRODUCED BY AQUEOUS POLYMERIZATION OF THE MONOMERS BY A PROCESS THAT REQUIRES THAT THE REATION BE CARRIED OUT AT FROM ABOUT 50 TO 110*C. IN THE PRESENCE OF A WATER-SOLUBLE INITIATOR SUCH AS AMMONIUM PERSULFATE, AN EMULSIFYING AGENT AND A GASEOUS CHAIN TRANSFER AGENT SUCH AS HYDROGEN, METHANE OR ETHANE.
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