申请人:Kao Corporation
公开号:EP0835924A1
公开(公告)日:1998-04-15
A lubricating oil additive for diesel engines comprising one or more members of carboxylic acids, metal salts of carboxylic acids, amine salts of carboxylic acids, and carboxylic acid amides, each having a substituted amino group or substituted amino groups in a molecule, wherein the substituted aminocarboxylic acid compounds have a function of dispersing water-containing calcium sulfate in an oil; and a lubricating oil composition for diesel engines including these lubricating oil additives for diesel engines. When the lubricating oil additives and the lubricating oil compositions for diesel engines of the present invention are added to the lubricating oil, the dispersion function of the water-containing calcium sulfate admixed in the lubricating oil is dramatically improved, and the dispersion functions in oil of the staining components, such as soots, sludges, and the like, mentioned above owned by the lubricating oil are enhanced, so that its detergency is dramatically improved. Therefore, it is made possible to lower the concentration in the amount of the metal-based detergent as well as to lengthen the service life of the lubricating oil.
一种柴油发动机用润滑油添加剂,包括羧酸、羧酸的金属盐、羧酸的胺盐和羧酸酰胺中的一种或多种成分,每种成分的分子中都有一个或多个取代的氨基,其中取代的氨基羧酸化合物具有分散油中含水硫酸钙的功能;以及一种柴油发动机用润滑油组合物,包括这些柴油发动机用润滑油添加剂。将本发明的柴油发动机用润滑油添加剂和润滑油组合物添加到润滑油中后,掺入润滑油中的含水硫酸钙的分散功能得到显著改善,润滑油所拥有的上述沾污成分(如煤烟、淤泥等)在油中的分散功能得到增强,从而使其清净性得到显著改善。因此,可以降低金属基清洁剂的用量浓度,并延长润滑油的使用寿命。