Fuel compositions of poly(oxyalkylene) aminocarbamate

A fuel composition comprising a major portion of hydrocarbons boiling in the gasoline range and from 30 to 2000 ppm of a compound of the formula:

• ##STR6## wherein two R.sup.3 groups attached to the same nitrogen atom and taken together with said nitrogen atom may form a 5 or 6 membered saturated or unsaturated nitrogen heterocyclic radical;
• wherein said heterocyclic radical may be substituted with substituents selected from:
• (A) hydrogen;
• (B) hydrocarbyl groups of from 1 to 10 carbon atoms;
• (C) acyl groups of from 2 to 10 carbon atoms;
• and (D) monoketo, monohydroxy, mononitro, monocyano, lower alkyl and lower alkoxy derivatives of the substituents of (B) and (C);
• wherein the remaining R.sup.3 groups are the same or different substituents selected from (A), (B), (C), (D) and poly(oxyalkylene) oxycarbonyl groups of the formula R-(OC.sub.g H.sub.2g).sub.j O--C(O)-- in which g is an integer from 2 to 5;
• j is an integer such that the molecular weight of the poly(oxyalkylene) group is about 500 to 5,000, and R is a hydrocarbyl group of from 1 to 30 carbon atoms;
• wherein the R.sup.1 are the same or different alkylene, carbonyl, oxycarbonyl, or hydroxy-substituted alkylene radical of from 2 to 6 carbon atoms, and R.sup.2 is carbonyl, alkylene carbonyl or alkylene of 2 to 4 carbon atoms with vicinal linkages;
• wherein at least one of the R.sup.3 groups is said poly(oxyalkylene) oxycarbonyl group in which a sufficient number of oxyalkylene units, --OC.sub.g H.sub.2g --, are branched chains C.sub.3 -C.sub.5 oxyalkylene units to render said compound soluble in said fuel composition;
• wherein R.sup.3, R.sup.1 and R.sup.2 are selected such that at least one nitrogen atom is a basic nitrogen atom;
• and wherein a is 0 or 1, b is an integer 0 to 4, c is 0 or 1, d is 0 or 1, e is 0 or 1, f is 0 or 1 and equal to 1 when c is 0, and the sum f+b+2c+e is equal to or greater than 2.

A concentrate of a deposit control additive for fuel compositions comprises an inert stable oleophilic organic solvent boiling in the range of about 150.degree. F. to 400.degree. F. and from 10 to 50 weight percent of a compound of the formula:

• ##STR7## wherein two R.sup.3 groups attached to the same nitrogen atom and taken together with said nitrogen atom may form a 5- or 6-membered saturated or unsaturated nitrogen heterocyclic radical;
• wherein said heterocyclic radical may be substituted with substituents selected from:
• (A) hydrogen;
• (B) hydrocarbyl groups of from 1 to 10 carbon atoms;
• (C) acyl groups of from 2 to 10 carbon atoms;
• and (D) monoketo, monohydroxy, mononitro, monocyano, lower alkyl and lower alkoxy derivatives of the substituents of (B) and (C);
• wherein the remaining R.sup.3 groups are the same or different substituents selected from (A), (B), (C), (D) and poly(oxyalkylene) oxycarbonyl groups of the formula R--OC.sub.t H.sub.2g).sub.j O--C(O)-- in which g is an integer from 2 to 5;
• j is an integer such that the molecular weight of the poly(oxyalkylene) group is about 500 to 5,000, and R is a hydrocarbyl group of from 1 to 30 carbon atoms;
• wherein the R.sup.1 are the same or different alkylene, carbonyl, oxycarbonyl, or hydroxy-substituted alkylene radical of from 2 to 6 carbon atoms, and R.sup.2 is carbonyl, alkylene carbonyl or alkylene of 2 to 4 carbon atoms with vicinal linkages;
• wherein at least one of the R.sup.3 groups is said poly(oxyalkylene) oxycarbonyl group in which a sufficient number of oxyalkylene units, --OC.sub.g H.sub.2g --, are branched chained C.sub.3 -C.sub.5 oxyalkylene units to render said compound soluble in hydrocarbons boiling in the gasoline range;
• wherein R.sup.3, R.sup.1 and R.sup.2 are selected such that at least one nitrogen atom is a basic nitrogen atom;
• and wherein a is 0 or 1, b is an integer 0 to 4, c is 0 or 1, d is 0 or 1, e is 0 or 1, f is 0 or 1 and equal to 1 when c is 0, and the sum f+b+2c+e is equal to or greater than 2.