| 摘要 |
<p>Metal or metalloid salts and complexes of alkylated hydroxy- and amino-substituted phenols are useful as additives for lubricants and fuels. The alkyl group in such salts and complexes contains at least 30 aliphatic carbon atoms. Typical products are made by subjecting a polyisobutene/phenol reaction product to nitration, then reduction, then reaction with a compound of B, Li, Mg, Ca, Ba, Zn, Al, Cu or Cr. Overbased salts may be prepared, and reaction products with formaldehyde are also described.</p> |
