| 摘要 |
PROBLEM TO BE SOLVED: To provide a new lubricant composition for improving engine operation of an internal combustion engine. SOLUTION: The lubricating composition includes a major amount of oil of lubricating viscosity; and a minor amount of at least one highly grafted, multi-functional olefin copolymer made by reacting an acylating agent with an olefin copolymer having a number average molecular weight greater than about 10,000 up to about 50,000 in the presence of a free radical initiator to provide an acylated olefin copolymer having a degree of grafting (DOG) of the acylating agent on the olefin copolymer of from above about 1.5 to about 3.0 wt.% and next, reacting the acylated olefin copolymer with an amine. COPYRIGHT: (C)2009,JPO&INPIT |
