| 摘要 |
<p>A dispersant additive for lubricating oils can be produced by reacting substituted succinic anhydrides with alkylene polamines, and acylating the resulting succinimide with oxalic acid. Preferred products having the formula <CHEM> in which R is hydrocarbyl having from 8 to 400 carbon atoms, xis 1 to 6, y is 0 to 6, x+y is 1 to 6, R' is hydrogen or a mono-acyl, or bi-acyl radical of oxalic acid, and R'' is a hydrogen or a hydrocarbyl substituted succinic-N-ethylene radical having the formula: <CHEM> d</p> |
