PERFLUOROPOLYETHERS MODIFIED WITH QUINONE COMPOUNDS IN THE POLYMERIC CHAIN AND PROCESS FOR THEIR PREPARATION

摘要

Modified perfluoropolyethers containing, within the polymeric chain, repeating units derived from a quinone compound, are obtained by reacting a peroxidic oxygen-containing perfluoropolyether with a quinone compound, either at an elevated temperature between about 100 DEG and 350 DEG C or under radiation with ultraviolet light at least a portion of which is in the 200-300 millimicron range, whereby the peroxidic bridges are gradually replaced by the quinone units. The reaction is believed to proceed by a free-radical mechanism. The resulting products may be linear, branched, or cross-linked, depending upon the reaction conditions, ratio of reactants, and nature of the starting materials. The products are essentially unvulcanized rubbers which can be vulcanized by common vulcanizing agents such as diamines.