Patent ID: 7666822
Filing Date: 2010-02-23
Classification: C10M,C10N

Abstract:
1. A lubricating oil in contact with ship propulsor bearings which comprises a water-soluble alkylene glycol and/or polyalkylene glycol (A) with a number average molecular weight of not higher than 1,000 as a base oil as well as a water-soluble thickening agent (B) and a water-soluble anticorrosive agent (C) and in which the content of (A) is 80 to 98% by weight, that of (B) is 1 to 6% by weight and that of (C) is 1 to 10% by weight, relative to the weight of the lubricating oil for ship propulsor bearings and the bearing-damaging pressure at 50° C is not lower than 3.5 MPa, and wherein the water-soluble thickening agent (B) is EO/PO adduct derived from a polyamidepolyamine, and the water-soluble thickening agent (B) has a number average molecular weight of 10,000 to 1,000,000.