申请人:——
公开号:US20030166474A1
公开(公告)日:2003-09-04
The present invention concerns friction reducers for use in lubricating oil compositions which comprise certain groups of aromatic compounds, esters, narrow mixtures of base stocks, and/or amorphous polymers such as amorphous olefin copolymers. These compositions can provide substantial reductions in the coefficient of friction and fuel economy improving benefits when admixed to lubricating oils without deleterious effects such as instability, undesirable high viscosities and deposits. In one aspect of the invention, pentaerythritol esters and optionally triol esters are added to lubricating oil compositions to provide reduced friction and improved fuel economy. In a second aspect of the invention, similar results are obtained by adding hydrocarbyl aromatics to a lubricating oil composition containing one or more of Groups II and III base stock. In a third aspect, the invention concerns a lubricating oil composition comprising an amorphous olefin copolymer and one or more of Groups II and III base stocks. In one embodiment, the third aspect also includes one or more of hydrocarbyl aromatics and polyol esters as part of the composition. In a forth aspect, moderate concentrations of hydrocarbyl aromatics are used in a lubricating oil composition comprising paraffinic base oil stocks and preferably a borated polyisobutenyl succinimide ashless dispersant.
本发明涉及用于润滑油组合物的减摩剂,这些组合物包括某些芳香族化合物、酯类、基础油的狭义混合物和/或无定形聚合物(如无定形烯烃共聚物)。这些组合物掺入润滑油后,可大幅降低摩擦系数,提高燃油经济性,同时不会产生有害影响,如不稳定性、不理想的高粘度和沉积物。在本发明的一个方面中,季戊四醇酯和可选的三醇酯被添加到润滑油组合物中,以减少摩擦并提高燃油经济性。在本发明的第二个方面,通过向含有一种或多种第二类和第三类基础油的润滑油组合物中添加烃基芳烃,可获得类似的效果。第三方面,本发明涉及一种包含无定形烯烃共聚物以及第二类和第三类基础油中的一种或多种的润滑油组合物。在一个实施方案中,第三方面还包括作为组合物一部分的一种或多种烃基芳烃和多元醇酯。在第四个方面中,中等浓度的烃基芳烃被用于润滑油组合物中,该组合物包括石蜡基础油和优选的硼化聚异丁烯基琥珀酰亚胺无灰分散剂。