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US 4,400,178 AGranted
Liquid fuels containing polyamine dispersants
AssigneeThe Lubrizol Corporation
InventorDonald I. Hoke
Life of this patent
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Abstract
Certain polyamines are useful carburetor dispersants for liquid fuel compositions. Among the suitable polyamines are diamines which may be prepared by the Mannich reaction of certain primary or secondary amines with an aldehyde such as formaldehyde and an aliphatic nitro compound such as 2-nitropropane, followed by reduction of the nitro group.
Claims12
A fuel composition comprising a major amount of a normally liquid fuel and a minor amount of at least one polyamine of the formula ##STR4## wherein:
- R.sup.1 is an aliphatic hydrocarbon-based radical free from acetylenic unsaturation and containing 16-18 carbon atoms;
- R.sup.2 is hydrogen or an aliphatic hydrocarbon-based radical free from acetylenic unsaturation and containing 16-18 carbon atoms;
- and
- each of R.sup.4 and R.sup.5 is a lower alkyl radical.
1 more element
Dependencies are inferred from the claim text.