Marine engine lubrication
    50.
    发明专利
    Marine engine lubrication 有权
    海上发动机润滑

    公开(公告)号:JP2009280815A

    公开(公告)日:2009-12-03

    申请号:JP2009122168

    申请日:2009-05-20

    Abstract: PROBLEM TO BE SOLVED: To solve the stability problem in Group II oils by employing specific ratios of overbased metal carboxylate detergents of defined basicity index.
    SOLUTION: A trunk piston marine engine lubricating oil composition for a medium-speed compression-ignited marine engine comprises or is prepared by mixing, in a major amount, an oil having lubricating viscosity and containing ≥50 mass% of a Group II base stock, and, in respective minor amounts, (A) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having ≤4.5 basicity index, and (B) an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having >4.5 basicity index. The ratio of detergent (A) to detergent (B), both expressed as mass of active ingredient, is in the range of 0.5 to 15. The trunk piston marine engine lubricating oil composition includes a TBN (the total base number using ASTM D2896) of 20 to 60.
    COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题:通过使用确定的碱度指数的特定比例的高碱性金属羧酸盐清净剂来解决II类油中的稳定性问题。 解决方案:用于中速压缩点火的船用发动机的躯干活塞船用发动机润滑油组合物包括或通过主要混合具有润滑粘度并且含有≥2组质量的组II的油的制备 (A)具有≤4.5碱度指数的高碱性金属烃基取代羟基苯甲酸盐洗涤剂和(B)具有> 4.5碱度指数的高碱性金属烃基取代的羟基苯甲酸盐清净剂。 洗涤剂(A)与洗涤剂(B)的比值(均以活性成分的质量计)在0.5至15的范围内。主干活塞船用发动机润滑油组合物包括TBN(使用ASTM D2896的总碱值) (C)2010年,JPO&INPIT

Patent Agency Ranking