A lubricating oil composition having greater than 50 wt % of a base oil and 0.1 wt % to 20 wt %, both based on the total weight of the lubricating oil composition, of a dispersant viscosity modifier obtainable by:
A) reacting: a) at least one of a lactone of formula (I) or a derivative thereof:
wherein X is oxygen, and R is an optionally substituted hydrocarbylene group having from 1 to 20 carbon atoms; and
b) at least one compound selected from amines, alcohols and oxazolines; and
B) reacting the reaction product of step A) onto an acylated olefin copolymer obtainable by acylating a copolymer of ethylene and one or more C3-C10 alpha-olefins having a number average molecular weight of 5,000 to 200,000 g/mol as measured by GPC, with an acylating agent. Methods employing the lubricating oil compositions and uses of the lubricating compositions as engine oils are also described.
一种润滑油组合物,其中基础油的重量百分比大于 50%,分散剂粘指剂的重量百分比为 0.1%至 20%(均以润滑油组合物的总重量为基准),分散剂粘指剂可通过以下方法获得:
A) 反应: a) 至少一种式 (I) 的内酯或其衍
生物:
其中 X 是氧,R 是具有 1 至 20 个碳原子的任选取代的碳氢基团;以及
b) 至少一种选自胺、醇和
噁唑啉的化合物;以及
B)将步骤 A 的反应产物与酰化烯烃共聚物反应,酰化烯烃共聚物可通过将
乙烯与一种或多种 C3-C10 α-烯烃的共聚物酰化而获得,
乙烯与一种或多种 C3-C10 α-烯烃的共聚物经
GPC 测定的平均分子量为 5,000 至 200,000 g/mol,酰化烯烃共聚物可通过将
乙烯与一种或多种 C3-C10 α-烯烃的共聚物酰化而获得。此外,还介绍了使用润滑油组合物的方法以及润滑油组合物作为发动机油的用途。