INHIBITION OF THE CHANGES IN DIELECTRIC-PROPERTIES CAUSED BY THE OXIDATION OF HYDROCARBONS

The additive effects of multicomponent hydrogen-donating hydrocarbons derived from petroleum (HHAP) on the changes in the dielectric propert ies caused by the oxidation of hydrocarbons were tested compared with conventional antioxidants, and the following results were obtained: (1 ) The addition of HHAP to LDPE did not affect the dissipation factor, in contrast to the changes caused by the conventional hindered phenoli c and bisphenolic antioxidants. (2) During the oxidation of n-paraffin wax at 160 degrees C in air, the changes in dissipation factor caused by the oxidation were sufficiently inhibited by the addition of HHAP (1 and 2 wt %). (3) The results of the chemical analyses, including IR , acid value, and oxygen content, were well consistent with the dissip ation factor. These outcomes are attributable to the high radical-scav enging ability and the pure hydrocarbon constitution of HHAP, which ha s no functional groups that contain heteroatoms.