PERFLUOROPOLYETHERS AND PROCESSES FOR PREPARING THEM

摘要

3995 "NEW PERFLUOROPOLYETHERS AND PROCESSES FOR PREPARING THEM" The invention relates to new peroxide perfluoropolyethers having formula: (I) wherein: A and B are end groups, X represents a (R'0)mR" group where R' is selected from the class consisting of -CF2- , -CF2-CF2- and , and R" is a perfluoroalkyl group; the value of "m" ranging from 0 to 6. The invention relates also to processes for preparing said perfluoropolyethers and other classes of non peroxide perfluoropolyethers derived therefrom.