| abstract |
An additive composition comprising a graft and derivatized copolymer prepared from ethylene and at least one Cā - Cāā alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates, which are then reacted with a N-(2-aminoalkyl)imidizolidone to form said graft derivatized copolymer, and a lubricating oil composition containing same are disclosed. |