| 摘要 |
<p>A quaternary ammonium salt of a diester represented by the formula: in which Ri, Rii, Riii and Riv represent hydrogen, alkyl or alkenyl hydrocarbyl radicals at least one of which is a hydrocarbyl radical having from 50-200 carbon atoms, R is a divalent radical having from 2-6 carbon atoms, or an alkoxy alkyl radical wherein the divalent alkyl radicals contain 2 to 4 carbon atoms, Rv is hydrogen or an alkyl radical having 1 to 3 carbon atoms, z has a value from 0-2 and X is an anion selected from the group consisting of halides, sulfates, carbonates, sulfites, borates, carboxylates, and phosphates, is provided, as well as a method of preparation and a hydrocarbon lubricating oil composition containing same.</p> |
