Evaluation of Some Insulated Greases Prepared from Rubber and Bitumen Thickeners
- 1 Egyption Petroleum Research Institute, Cairo, Egypt.
- 2 Egyption Petroleum Research Institute, Cairo, Egypt.
- 3 Egyption Petroleum Research Institute, Cairo, Egypt.
- 4 Faculty of Science, Al-Azhar University, Cairo, Egypt.
- 5 Egyption Petroleum Research Institute, Cairo, Egypt.
Abstract
The wax gel grease (S 0 ) was prepared from a mixture of 2.3:1 base oil blend (base oil grade 260/290, transformer oil), and microcrystalline wax in the presence of 0.1 % - 2% of polyoxyethylene sorption nano-palmitate as antioxidant and 2,2 methylene bis (4-methyle-6-tertiary butyl phenol) as anticorrosion. It was found that the prepared Wax gel grease has inconvenient physico-chemical and dielectric properties, so in order to improve its physico-chemical properties (viscosity, penetration, dropping point and water resistance) and dielectric Properties (dielectric constant, dielectric loss and volume resistivity), Butyl rubber, isoprene rubber and bitumen were added separately as thickening agents to the prepared wax gel in certain proportion at certain frequency range 1 - 1000 KHz at 35°C. The best dielectric properties were achieved by adding butyl rubber to the prepared wax gel.
- Malakule, “Grease Technology, Part I,” Tsikot, Philippines, 2003.
- V. P. Sukhanov, “Petroleum Processing,” Mir Publishers, Moscow, 1982, p. 378.
- W. Artemas, “Domain 1911 Edition of the Grocers,” Encyclopedia, New York, 2008.
- C. J. Donahue, “Lubricating Grease: A Chemical Primer” Journal of Chemical Education, Vol. 83, No. 6, 2006, p. 862.
- Y. Toomas, “Oil or Greases Lubrication,” 2001.
- V. V. Sinitsyn, N. N. Grishin, G. F. Ogorodnikova and S. M. Utekhina, “Structural Compatibility of Rubbers and Lubricating Greases,” Chemistry and Technology of Fuels and Oils, Vol. 21, No. 4, 1985, pp. 26-27. doi:10.1007/BF00723298
- K. Tamakas and Y. Mansumori, “Yoshibisa,” Canadian Patent No. 5110489, 2000.
- M. Brauer and Y. C. Chu, “Cable Grease Composition and Articles Incorporating Same,” US Patent No. 5348669, 1994.
- M. Braver, “Polypropylene Compatible Grease Compositions for Optical Fiber Cable,” US Patent No. 5672640, 1997.
- B. De Vivo, L. Egiziano, P. Lamberti, V. Tucci and CEIDP “Electrical Insulation and Dielectric Phenomena,” Annual Report, 14-17 October 2007, pp. 45-48.
- R. John and W. David, “Shell Bitumen, the Shell Bitumen Industrial Hand Book,” Thomas Telford, London, 1995, p. 339.
- M. A. E. Youssif, “Evaluation of Some Prepared Greases Based on Petroleum Wax Gel,” M.Sc. Thesis, Al-Azhar University, Cairo, 2009.
- A. M. Hassan, “Greases from Some Petroleum and Coal Tar Products,” M.Sc. Thesis, Faculty of Science, Al-Azhar University, Cairo, 1978.
- L. Meals, “Reinhold Plastic Applications Series, Silicon,” Reinhold Pub. Corp., New York, 1961, pp. 84, 204-205.
- Gunderson and Hart, “Gunderson and Hart, Synthetic Lubricants,” Reinhold Puble. Corp., New York, 1962, pp. 259-263, 317-319, 355-356, 470-473.
- L. Jan and B. Seven, “Hand Book of Grease Applications,” Industrial Lubrication and Tribology, Vol. 52, No. 5, 2000, p. 221.
- V. P. Sukhanov, “Petroleum Processing,” Mir Publishers, Moscow, 1982, p. 17.
- A. R. El-Adly and A. S. Ward, “Evaluation of different grades of lube base oils as insulating oil,” Egyptian Journal of Petroleum, Vol. 13, No. 1, 2004, p. 69.