| 摘要 |
<p>Fuel composition contains an Otto fuel and a small amount of an Otto fuel additive containing a hydrophobic hydrocarbon residue and a specified polar group. Fuel composition comprises an Otto fuel containing a maximum of 42 vol.% aromatics and a sulfur content of a maximum of 150 wt. ppm, and a small amount of an Otto fuel additive with effective detergency and valve seat antiwear properties. The additive comprises a hydrophobic hydrocarbon residue and a specified polar group selected from: (a) mono- and polyamino groups with up to 6 nitrogen atoms, (b) nitro groups optionally in combination with hydroxyl groups, (c) hydroxyl groups in combination with mono- and polyamino groups, (d) carboxyl groups or their alkali metal or alkaline earth metal salts, (e) sulfonic acid groups or their alkali metal or alkaline earth metal salts, (f) polyoxy 2-4C alkylene groups, (g) carboxylic acid ester groups, (h) groups derived from succinic acid anhydride with hydroxy and/or amino and/or amido and/or imido groups, and (i) groups obtained by Mannich conversion of phenolic hydroxyl groups with aldehydes and mono- and polyamines.</p> |
