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1 International Journal of Applied Mechanics and Engineering

1 2006

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Investigation of PIB-succinimides in engine oils

Sagi R., Bartha L., Beck A., Baladincz J.

International Journal of Applied Mechanics and Engineering

2006

Vol. 11, no 3

507-513

Along with the ever stricter economical, technical and mainly environmental regulations new types of low phosphorous, sulphurous and metal containing multifunctional engine oil additives are required. In the greatest volume dispersant additives, mainly polyisobuthylene-succinimides are used in the formulation of engine oils. By structure modification advantageous complementary effects could be achieved along the high detergent-dispersant efficiency. In view of this different modified PIB-polysuccinimides with complementary AF/AW, viscosity-index improver and enhanced detergent-dispersant properties were synthesized and investigated in base oil and engine oils. The potential detergent-dispersant efficiency, spot dispersancy, thermal- and oxidation stability, deposit preventing effect and AF/AW properties were studied in fully formulated engine oils. Based on the results it was found that by using suitable additive concentrations the conventional dispersant can be advantageously combined or replaced with these new additives to enhance the properties of the experimental engine oils.