Mannich condensation products of polyalkylene hydroxyaromatic esters and fuel compositions containing the same

A compound of the formula:

• ##STR12## and a fuel-soluble salt thereof;
• wherein wherein
• R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 carbon atoms;
• R.sup.1 is a polyalkyl group having an average molecular weight in the range of about from 400 to 5000;
• n is 0 or a whole integer of from 1 through 10;
• R.sup.2 is hydrogen or lower alkyl having 1 through 6 carbon atoms;
• Y is amino, lower alkylamino having 1 through 6 carbon atoms or a polyamine radical having 2 through 40 carbon atoms and 2 through 12 amine nitrogen atoms with the proviso that the attachment of Y to the ##STR13## linking group is via one of its amine nitrogen atoms and the further proviso that the
• the ##STR14## substituent is ortho to a hydroxy substituent on the benzene ring and the remaining substituents may be at any available position on the benzene ring.

A fuel mixture comprising a major amount of hydrocarbons boiling in the gasoline or diesel oil range and an amount effective to reduce intake valve deposits of a fuel additive selected from the group consisting of a composition prepared by the Mannich condensation of a compound having the formula ##STR15## wherein R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 carbon atoms;

• R.sup.1 is polyalkyl having an average molecular weight of about from 400 to 5000 and n is 0 or a whole integer of from 1 through 10;
• with formaldehyde or an alkylaldehyde having 1 through 6 carbon atoms and a nitrogen base selected from ammonia, lower alkylamine having 1 through 6 carbon atoms, a polyamine having 2 through 40 carbon atoms and 2 through 12 amine nitrogen atoms;
• fuel soluble salts of said composition;
• and mixtures thereof.

A fuel mixture comprising a major amount of hydrocarbons boiling in the gasoline or diesel oil range and an amount effective to reduce intake valve deposits of a fuel additive selected from the group consisting of a compound of the formula ##STR16## wherein R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 carbon atoms;

• R.sup.1 is a polyalkyl group having an average molecular weight in the range of about from 400 to 5000;
• n is 0 or a whole integer of from 1 through 10;
• R.sup.2 is hydrogen or lower alkyl having 1 through 6 carbon atoms;
• Y is amino, lower alkylamino having 1 through 6 carbon atoms or a polyamine radical having 2 through 40 carbon atoms and 2 through 12 amine nitrogen atoms with the proviso that the attachment of Y to the ##STR17## linking group is via one of its amine nitrogen atoms and the further proviso that the --CH(R.sup.2)Y substituent is ortho to a hydroxy substituent on the benzene ring and the remaining substituents may be at any available position on the benzene ring;
• fuel soluble salts of the compound of formula (I);
• and mixtures thereof.

A fuel concentrate comprising an inert stable oleophilic organic solvent boiling in the range of about from 65.degree. C. to 210.degree. C. and from 10 to 70 wt. % of a fuel additive selected from the group consisting of a composition prepared by the Mannich condensation of a compound having the formula ##STR18## wherein R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 carbon atoms;

• R.sup.1 is polyalkyl having an average molecular weight of about from 400 to 5000 and n is 0 or a whole integer of from 1 through 10;
• with formaldehyde or an alkylaldehyde having 1 through 6 carbon atoms and a nitrogen base selected from ammonia, lower alkylamine having 1 through 6 carbon atoms, a polyamine having 2 through 40 carbon atoms and 2 through 12 amine nitrogen atoms;
• fuel soluble salts of said composition;
• and mixtures thereof.

A fuel concentrate comprising an inert stable oleophilic organic solvent boiling in the range of from about 65.degree. C. to 210.degree. C. and from about 10 to about 70 wt. % of a fuel additive selected from the group consisting of a compound of the formula ##STR19## wherein R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 carbon atoms;

• R.sup.1 is a polyalkyl group having an average molecular weight in the range of about from 400 to 5000;
• n is 0 or a whole integer of from 1 through 10;
• R.sup.2 is hydrogen or lower alkyl having 1 through 6 carbon atoms;
• Y is amino, lower alkylamino having 1 through 6 carbon atoms or a polyamine radical having 2 through 40 carbon atoms and 2 through 12 amine nitrogen atoms with the proviso that the attachment of Y to the ##STR20## linking group is via one of its amine nitrogen atoms and the further proviso that the --CH(R.sup.2)Y substituent is ortho to a hydroxy substituent on the benzene ring and the remaining substituents may be at any available position on the benzene ring;
• fuel soluble salts of the compound of formula (I);
• and mixtures thereof.