MANUFACTURING METHOD OF FLUID DYNAMIC BEARING OIL COMPOSITION

摘要

The present invention relates to a method for manufacturing a fluid dynamic bearing oil composition, including: a step of preparing a fluid hydrodynamic bearing oil composition including an ester-based base oil; and a step of performing a vacuum baking of the fluid hydrodynamic bearing oil composition. According to the present invention, by performing the vacuum baking step when manufacturing the fluid hydrodynamic bearing oil composition, impurities contained in the oil and unreacted materials can be removed, so as to improve the evaporation of the fluid hydrodynamic bearing oil. [Reference numerals] (AA) Evaporation loss (%); (BB) Evaporation loss change; (CC) Time (hr); (DD) Comparative example; (EE) Example