Acylatign agents and dispersants for lubricating oil and fuels

   
   

Hydrocarbyl substituted carboxylic compositions and derivatives thereof useful as additives for lubricating oil and fuel compositions. Carboxylic composition are derived from (A) an olefinically unsaturated hydrocarbon, said hydrocarbon having at least one allylic hydrogen atom, and (B) an .alpha.,.beta.-unsaturated carboxylic compound prepared by reacting (1) an active methylene compound of the formula ##STR1## and (2) a carbonyl compound of the general formula ##STR2## wherein R.sup.a is H or hydrocarbyl and R.sup.b is a member of the group consisting of H, hydrocarbyl and ##STR3## wherein each R' is independently R or OR and each R is, independently, H or a hydrocarbyl group; and lower alkyl acetals, ketals, hemiacetals and hemiketals of the carbonyl compound (2). Carboxylic derivative compositions are obtained by reacting the carboxylic compositions with a reactant selected from the group consisting of (a) amines characterized by the presence within their structure of at least one condensable H--N< group, (b) alcohols, (c) reactive metal or reactive metal compounds, and (d) a combination of two or more of any of (a) through (c), the components of (d) being reacted with the carboxylic composition simultaneously or sequentially, in any order.

Composiciones substituidas Hydrocarbyl y derivados carboxylic de eso útiles como añadidos para las composiciones del aceite lubricante y del combustible. La composición carboxylic se deriva (a) de un hidrocarburo olefinically no saturado, hidrocarburo dicho que tiene por lo menos un átomo allylic del hidrógeno, y (b) un alpha., compuesto carboxylic de.beta.-unsaturated preparado reaccionando (1) un compuesto activo del metileno del ## del ## STR1 del fórmula y (2) un compuesto de carbonyl del ## general del ## STR2 del fórmula en donde R.sup.a es H o el hydrocarbyl y R.sup.b es un miembro del grupo que consiste en el ## de H, del hydrocarbyl y del ## STR3 en donde cada R ' es independientemente R u O y de cada R es, independientemente, H o un grupo del hydrocarbyl; y acetales, ketals, hemiacetals y hemiketals alkyl más bajos del compuesto de carbonyl (2). Las composiciones derivadas carboxylic son obtenidas reaccionando las composiciones carboxylic con un reactivo seleccionado de las aminas que consisten en del grupo (a) caracterizadas por la presencia dentro de su estructura por lo menos de un H--N condensable

 
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