| abstract |
Polylactone aromatic esters having the formula: (I) wherein R1 is a hydrocarbyl group having a sufficient number of carbon atoms to render the compound soluble in hydrocarbons boiling in the gasoline or diesel fuel range; R2 is an alkylene group of about 2 to 5 carbon atoms; R3 and R4 are each independently hydrogen, hydroxy, nitro, amino, N-alkylamino having 1 to 6 carbon atoms in the alkyl group, or N,N-dialkylamino having 1 to 6 carbon atoms in each alkyl group, provided that R3 and R4 may not both be hydrogen; and x is an integer from 1 to 25. The polylactone aromatic esters of formula I are useful as fuel additives for the prevention and control of engine deposits. |