| 摘要 |
PURPOSE:To provide the title compsn. which has excellent pressure resistance and abrasion resistance irrespective of heavy load and high revolution rate, by adding a polymer viscosity index improver, a particular polyisobutylene oil soln. and a load-resistant additive to a base oil or a liq. lubricating oil contg. an oil additive. CONSTITUTION:A polyisobutylene having a viscosity-average MW of 200,000-2,100,000 obtd. by cationic polymn. of isobutylene at about -100 deg.C in the presence of a catalyst is dissolved in a hydrocarbon solvent, thereby preparing a polyisobutylene oil soln. (C). A base oil or a liq. lubricating oil contg. an additive (A) is blended up to 80wt.% polymer viscosity index (B), up to 90wt.% component (C), and up to 50wt.% load-resistant additive (D). |
