| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to a lubricant base oil composition containing: (a) mineral oil-derived base oil having content of saturated compounds higher than 90 wt %, sulphur content below 0.03 wt % and viscosity index between 80 and 150, and (b) a paraffin base oil component having viscosity at 100°C from 7 to 30 cSt (from 7 to 30 mm/s), where component (b) is an isomerised residual product obtained during Fischer-Tropsch synthesis and has percentage ratio of secondary methylene carbon atoms, lying four or more carbon atoms from the terminal group and the branching, to isopropyl carbon atoms, found using aC-NMR technique, less than 8.2; wherein the base oil mixture has clouding point below 0°C and kinematic viscosity at 100°C higher than 12.0 cSt. The invention also relates to a method of producing a lubricating base oil mixture.EFFECT: lubricating oil mixture has high viscosity index and high content of saturated compounds with a low pour point.9 cl, 1 dwg, 5 tbl, 3 ex |
