Special polyisobuteneamines and use as detergents in fuels

Details Special polyisobuteneamines and use as detergents in fuels Special polyisobuteneamines and use as detergents in fuels

C - Chemistry, Metallurgy

08

F

C08F 8/32 (2006.01) C08F 10/10 (2006.01) C10L 1/22 (2006.01) C10L 10/04 (2006.01)

Patent

CA 2713262

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.

L'invention concerne des polyisobutène-amines de formule générale R1CH2-NR2R3, où : R1 représente un radical polyisobutyle dérivé de l'isobutène et jusqu'à 20% en poids du n-butène, avec un poids moléculaire moyen en nombre Mn de 600 à 770 ; et R2 et R3 représentent indépendamment l'un de l'autre de l'hydrogène, un radical C1-C18-alkyle, C2-C18-alcényle, C4-C18-cycloalkyle, C1-C18-alkylaryle, hydroxy-C1-C18-alkyle, poly(oxyalkyle), polyalkylènepolyamine ou polyalkylèneimine, ou représentent un cycle hétérocyclique conjointement avec l'atome d'azote auquel ils sont liés. Ces polyisobutène-amines conviennent comme détergents dans des carburants pour moteurs Otto : ils réduisent le collage des soupapes et améliorent la compatibilité des détergents avec les huiles porteuses, ainsi que la compatibilité dans des compositions de carburants qui contiennent une part de carburant minéral et des C1-C4-alcanols.

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