| 摘要 |
PURPOSE:To obtain the subject composition capable of preventing noise production and formation of precipitates by reaction with contaminant water without detriment to its frictional properties, abrasion preventing properties, etc. CONSTITUTION:This composition is prepared by mixing a lube base oil which 0.01-5.0wt.%, based on the total weight of the composition, salt of an N- alkylpolyalkylene-diamine represented by the formula (wherein R<1> is a group of a hydrocarbon derived from tallow fatty acid; and (n) is an integer of 2-10) and 0.05-7.0wt.% alkoxyphosphoric ester. |
