Substituted biphenyl poly (oxyalkylene) ethers and fuel compositions containing the same

A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and an effective deposit-controlling amount of a compound of the formula:

• ##STR27## wherein:
• R.sub.1 is hydrogen or hydroxyl;
• R.sub.2 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 R.sub.1 and R.sub.2 are ortho relative to each other and meta or para relative to the adjoining phenyl substitutent;
• R.sub.3 and R.sub.4 are independently hydrogen or lower alkyl having 1 to about 6 carbon atoms and each R.sub.3 and R.sub.4 is independently selected in each --OCHR.sub.3 --CHR.sub.4 -- unit;
• R.sub.5 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:
• ##STR28## wherein R.sub.6 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.

A fuel concentrate comprising an inert stable oleophilic organic solvent boiling in the range of from about 150.degree. F. to about 400.degree. F. and from about 10 to about 70 weight percent of a compound of the formula:

• ##STR29## wherein:
• R.sub.1 is hydrogen or hydroxyl;
• R.sub.2 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 R.sub.1 and R.sub.2 are ortho relative to each other and meta or para relative to the adjoining phenyl substitutent;
• R.sub.3 and R.sub.4 are independently hydrogen or lower alkyl having 1 to about 6 carbon atoms and each R.sub.3 and R.sub.4 is independently selected in each --OCHR.sub.3 --CHR.sub.4 -- unit;
• R.sub.5 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:
• ##STR30## wherein R.sub.6 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.