| abstract |
Disclosed are polyisobutene amines of general formula R1CH2-NR2R3 in which R1 represents a polyisobutyl radical that is derived from isobutene and up to 20 percent by weight of n-butene and has a number average molecular weight Mn ranging from 600 to 770, and R2 and R3 independently represent hydrogen, a C1-C18 alkyl radical, C2-C18 alkenyl radical, C4-C18 cycloalkyl radical, C1-C18 alkyl aryl radical, hydroxy-C1-C18 alkyl radical, poly(oxyalkyl) radical, polyalkylene polyamine radical, or polyalkylene imine radical, or a heterocyclic ring along with the nitrogen atom to which they are bonded. Said polyisobutene amines are suitable as detergents in gasolines, reduce valve stickiness, and improve compatibility of the detergents with flotation oils and compatibility in fuel compositions containing a mineral fuel percentage and C1-C4 alkanols. |