,申请号JP20060259172-传众专利搜索

申请公布号：JP5248002(B2)

申请号：JP20060259172

申请日期：2006.09.25

申请公布日期：2013.07.31

分类号：C10M169/04;C10M133/16;C10M143/00;C10M159/20;C10N20/02;C10N20/04;C10N30/04;C10N40/25

主分类号：C10M169/04

摘要：PROBLEM TO BE SOLVED: To provide a cylinder oil composition for a crosshead diesel engine, excellent in piston cleaning properties. SOLUTION: The cylinder oil composition is prepared by adding (B) 0.5-10 mass% polybutene having a weight average molecular weight (Mw) of 6,000-12,000 and a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 2.0-3.5 and/or (C) 0.5-10 mass% ethylene/α-olefin co-oligomer having a weight average molecular weight (Mw) of 10,000-20,000 and a ratio (Mw/Mn) of 1.0-3.0 and (D) a metallic cleaning agent with a content (by base value conversion of composition standard) of 30-80 mg KOH/g to (A) a base oil comprising at least one kind selected from mineral lubricating oils and synthetic lubricating oils and having kinematic viscosity at 100°C of 7-15 mm<SP>2</SP>/s. COPYRIGHT: (C)2008,JPO&INPIT