Preparation of some dielectric greases from different types of polymers

At this research the grease (S0) containing [base lube oil grade 260/290, transformer oil, microcrystalline wax, Polyoxyethylene sorbiton-mono-palmitate antioxidant 2,2″methylenebis(4-methyl-6-tertiary-butyl phenol) anticorrosion] was prepared. To improve its physicochemical & dielectric properties (dielectric constant, dielectric loss, and volume resistivity) and giving it a good electrical insulator property, we add to the wax gel a nonpolar polymer as polyethylene, atactic polypropylene, unplastesized polyvinyl chloride, and plasticized polyvinyl chloride include triisopropyle vinyl phosphate in certain concentration. We conclude that the best insulation properties was achevied by adding atactic polypropyle. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011