| 摘要 |
PURPOSE:To provide the titled compsn. which has excellent shear stability without causing external and internal leakage, by blending a petroleum resin to a base oil. CONSTITUTION:0.01-10wt% aliph. arom. or alicyclic petroleum resin having an average MW of 400-2,000 and optionally wear-resisting agent, detergent-dispersant, wear-reducing agent, viscosity index improver, etc. are blended with a base oil composed of a mineral oil or a synthetic oil such as alpha-olefin oligomer. |
