潤滑油および燃料のためのアシル化剤および分散剤

Japanese Patent JP2004501270

A

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 formulaand(2) a carbonyl compound of the general formulawherein Ris H or hydrocarbyl and Ris a member of the group consisting of H, hydrocarbyl andwherein 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.