f - 3 - methylbutene - 1 has been oxidized using oxygen and ultraviolet radiation to form poly oligomers . the formation of fluoroformate terminated material is insignificant . this is in sharp contrast to the products derived from the prior art oxidation of f - propene in which up to 60 % fluoroformate terminated material was produced . f - ethylene can be added to the f - 3 - methylbutene - 1 reaction gas stream without adversely affecting the product composition . the fluoride oligomers , after addition of one unit of hexafluoropropylene oxide , can be converted to s - triazines which have excellent properties as hydrualic fluids .