PERFLUOROPOLYETHERS FREE FROM PEROXIDIC OXYGEN AND CONTAINING PERFLUOROEPOXY GROUPS POSITIONED ALONG THEIR PERFLUOROPOLYETHER CHAIN, AND THEIR DERIVATIVES

摘要

Perfluoropolyethers having fluorinated epoxy groups positioned along their perfluoropolyether chain, and free from peroxidic oxygen, are obtained by means of a low-temperature oxidation process, in the liquid phase, with molecular oxygen and in the presence of U.V. light, of a mixture of a perfluorinated monoolefin and a perfluorinated configurated diene, and of the subsequent photochemical decomposition of the peroxy groups contained in the photooxidation product, carried out by treating the peroxy-groups-containing product with U.V. light at a temperature comprised within the range of from 0.degree.C to 160.degree.C. Derivatives of said epoxy containing perfluoropolyethers in which the epoxy groups have been turned into functional groups.