Mannich condensation products of poly(oxyalkylene)...

C - Chemistry – Metallurgy – 07 – C

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C07C 219/22 (2006.01) C07C 69/44 (2006.01) C07C 217/48 (2006.01) C07C 217/58 (2006.01) C10L 1/14 (2006.01) C10L 1/18 (2006.01) C10L 1/22 (2006.01) C10L 1/238 (2006.01) C10L 10/00 (2006.01) C10L 1/16 (2006.01) C10L 1/24 (2006.01) C10L 1/30 (2006.01)

Patent

CA 2178737

Mannich condensation products prepared by the condensation of a compound of formula (XIV), wherein R1 is hydrogen, hydroxy, lower alkyl or lower alkoxy; R3 and R4 are independently hydrogen or lower alkyl; R5 is hydrogen, alkyl, phenyl, aralkyl, alkaryl, or an acyl group of formulae (a) or (b) wherein R6 is alkyl, phenyl, aralkyl or alkaryl; R7 is alkyl; u is an integer from 1 to 10; n is an integer from 5 to 100; and x is an integer from 0 to 10; with an aldehyde and a nitrogen base selected from ammonia, lower alkylamine, a polyamine and mixtures thereof. The Mannich condensation products and their fuel soluble salts are useful as fuel additives for the prevention and control of engine deposits.

On prépare des produits de condensation de Mannich en condensant un composé de la formule (XIV) où R¿1? représente hydrogène, hydroxy, alkyle inférieur ou alcoxy inférieur; R¿3? et R¿4? représentent indépendamment hydrogène ou alkyle inférieur; R¿5? représente hydrogène, alkyle, phényle, aralkyle, alkaryle ou un groupe acyle de la formule (a) ou (b) où R¿6? représente alkyle, phényle, aralkyle ou alkaryle; R¿7? représente alkyle; u est un nombre entier compris entre 1 et 10, n un nombre entier compris entre 5 et 100, et x un nombre entier compris entre 0 et 10. On condense un tel composé avec un aldéhyde et une base azotée choisie parmi ammoniac, alkylamine inférieure, une polyamine et leurs mélanges. Ces produits de condensation de Mannich et leurs gels solubles dans des carburants servent d'additifs pour carburants qui préviennent ou minimisent les dépôts encrassant les moteurs.

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