Deposit control and dispersant additives
AssigneeChevron Research Company
InventorLewis R. Honnen
Life of this patent
Estimating the term…
Abstract
Additives for internal combustion engines are provided which in fuels maintain cleanliness of intake system without contributing to combustion chamber deposits and in lubricating oils act as dispersants. The additives are hydrocarbylpoly(oxyalkylene) polyamines comprising a hydrocarbyl-terminated poly(oxyalkylene) chain of 2-5 carbon oxyalkylene units bonded to a nitrogen atom of a polyamine having from 2 to 12 amine nitrogens and from 2 to 40 carbon atoms with a carbon:nitrogen ratio between 1:1 and 10:1.
Claims16
A fuel composition comprising a major portion of hydrocarbon boiling in the gasoline range, and from 30 to about 2,000 ppm of a hydrocarbylpoly(oxyalkylene) polyamine of molecular weight from about 500 to about 10,000;
- wherein said hydrocarbyl group contains from 1 to about 30 carbon atoms, said poly(oxyalkylene) moiety comprises 8-100 oxyalkylene units selected from oxyalkylene units having from 2 to 5 carbon atoms at least a sufficient number of said oxyalkylene units being branched C.sub.3 -C.sub.5 oxyalkylene units to render said hydrocarbylpoly(oxyalkylene) polyamine soluble in said fuel composition, and said polyamine moiety comprises from 2 to about 12 amine nitrogen atoms and from 2 to 40 carbon atoms.
Compounds of the formula ##STR2## wherein two R.sup.3 groups attached to the same nitrogen atom may be taken together to form a 5-6 membered ring heterocyclic radical;
- wherein R.sup.3 may be the same or different and selected from hydrogen, hydrocarbyl from 1 to 10 carbon atoms, hydrocarbonyl of 2 to 10 carbon atoms and a poly(oxyalkylene) group of the formula R--OC.sub.g H.sub.2g --.sub.j 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 from about 500 to about 5000, and R is a hydrocarbyl group of from 1 to about 30 carbon atoms;
- R.sup.1 is the same or different alkylene or hydroxy-substituted alkylene group of 2 to 6 carbon atoms, 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 the poly(oxyalkylene) group, and at least a sufficient number of the oxyalkylene units, --OC.sub.g H.sub.2g --, are branched-chain C.sub.3 -C.sub.5 units to render the compound soluble in oils of lubricating viscosity or hydrocarbons boiling in the gasoline range;
- and wherein a is 0 or 1, b is an integer from 0 to 4, c is 0 or 1, d is 0 or 1, f is 0 or 1 and equal to 1 when c is 0, and f+b+2c+e is equal to or greater than 2.
Dependencies are inferred from the claim text.