| 摘要 |
Substituted biphenyl poly(oxyalkylene) ethers having the formula: <IMAGE> wherein R1 is hydrogen or hydroxyl; R2 is hydroxyl, cyano, nitro, amino, aminomethyl, N-alkylamino or N-alkylaminomethyl wherein the alkyl group contains 1 to about 6 carbon atoms, N,N-dialkylamino or N,N-dialkylaminomethyl wherein each alkyl group independently contains 1 to about 6 carbon atoms, with the proviso that R1 and R2 are ortho relative to each other and meta or para relative to the adjoining phenyl substitutent; R3 and R4 are independently hydrogen or lower alkyl having 1 to about 6 carbon atoms and each R3 and R4 is independently selected in each -OCHR3-CHR4- unit; R5 is hydrogen, alkyl having 1 to about 100 carbon atoms, phenyl, aralkyl having about 7 to about 100 carbon atoms, alkaryl having about 7 to about 100 carbon atoms; or an acyl group having the formula: <IMAGE> wherein R6 is alkyl having 1 to about 30 carbon atoms, phenyl, or aralkyl or alkaryl having about 7 to about 36 carbon atoms; and n is an integer from about 5 to about 100. The subsitituted biphenyl poly(oxyalkylene) ethers of the present invention are useful as fuel additives for the prevention and control of engine deposits.
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