申请人:EXXON CHEMICAL PATENTS INC.
公开号:EP0357215A1
公开(公告)日:1990-03-07
The present invention is directed to oil-soluble lubricating oil viscosity index improver/dispersant additives comprising Mannich Base condensates of a grafted ethylene copolymer, an optionally alkyl-substituted N-hydroxyaryl compound, an aldehdye, and a monosecondary amine, whereby oil solutions, particularly oil concentrates, of said additives which are characterized by minimal viscosity change over an extended period of time. These additives comprise a copolymer of ethylene with one or more C3 to C28 alpha-olefins, preferably propylene, which have been grafted with acid moieties, e.g. maleic anhydride, preferably using a free radical initiator in a solvent such as a lubricating oil, which is then either (a) reacted with an N-hydroxyaryl amine and then condensed with an aldehyde and a monosecondary amine to form the Mannich Base viscosity index improver/dispersant material, or (b) reacted with a preformed Mannich Base condensate of an N-hydroxyaryl amine. aldehyde and the monosecondary amine. The invention also relates to process for preparing the preceding products and their use in oil compositions.
本发明涉及油溶性润滑油粘度指数改进剂/分散剂添加剂,该添加剂由接枝乙烯共聚物、任选烷基取代的 N-羟基芳基化合物、醛染料和单仲胺的曼尼希碱缩合物组成。这些添加剂包括乙烯与一种或多种 C3 至 C28 α-烯烃(最好是丙烯)的共聚物,该共聚物已与酸接枝,例如马来酸酐,最好在润滑油等溶剂中使用自由基引发剂,然后(a) 与 N-羟基芳基胺反应,再与醛和单仲胺缩合,形成曼尼希碱粘度指数改进剂/分散剂材料,或 (b) 与 N-羟基芳基胺、醛和单仲胺的预制曼尼希碱缩合物反应。本发明还涉及上述产品的制备工艺及其在油类组合物中的用途。