INFLUENCE OF BASIC OIL VISCOSITY ON QUALITY INDICATORS RECYCLING PLASTIC LUBRICANTS

The results of laboratory research on determination of dependence between quality indicators of plastic oils and kinematic viscosity of base oil on the example of recycling lubricants obtained from spent lubricating oils are presented. As a thickener, secondary polyethylene of low pressure was used at a concentration of 5 % (w / w). It was established that the obtained dependences between the determined quality parameters of the lubricant and the kinematic viscosity of the base oil are adequately described by the polynomial of the second degree, as evidenced by the very high (0.93-0.99) values of the coefficients of reliability of the approximation of R2. Therefore, the kinematic viscosity of the base oil significantly affects the evaporation of the lubricant, the loss of oil during storage of lubricants and its rheological properties. When added the same concentration of thickener, the best properties were the lubricant obtained from high-viscosity transmission oil. The worst rheological properties differed from the lubricant with a little viscous hydraulic oil. In this regard, the kinematic viscosity of the base oil acts as a factor in the process of production of plastic lubricants, which controls, it is possible to form its structure, to predict the properties and reduce the cost, due to the rational use of the thickener.