PROCESS FOR THE PRODUCTION OF PERFLUORO-POLYETHERS SUBSTANTIALLY CONSTITUTED BY PERFLUOROOXYETHYLENE AND PERFLUOROOXYPROPYLENE UNITS

摘要

Perfluoropolyethers prevailingly constituted by repeatingunits -CF2CF2O- and with perfluoroalkyl terminalgroups, with a mutual ratio of the above C3/C2 unitscomprised within the range of from 0.2 to 6 are endowed withan optimum combination of chemical-physical properties whenprepared by photo-oxidation of C3F6+C2F4, under controlledoperating conditions.