Shell Oil Comapny

Richard Mark Scott

Robert W Shaw

Geoffrey D Armitage

The reaction product of (i) an oligomer formed from one monomer or two or more different monomers, the or each monomer being an ethylenically unsaturated compound and said oligomer or each of said monomers being optionally partially or fully esterified, with (ii) a polyalkenyl derivative of an ethylenically unsaturated carboxylic reagent (iii), and (iv) a polyamine containing at least two --NH.sub.2 and/or --NH groups, wherein at least one of the ethylenically unsaturated compounds of the oligomer has a functional group which can react with an amine; and the use of the reaction product for its dispercency and low haze properties in lubricant compositions, fuel compositions and additive concentrates.

Dispersant additives

The invention provides reaction products of:

Oil-soluble reaction products of polyenes

Stereospecific synthesis of ##STR1## (R-configuration at C.sup.2) by reaction of ##STR2## (S-configuration at C.sup.2) with ##STR3## at elevated temperature in the presence of a base, e.g., R-(-)-(2-(N-benzoyl-3-chloro-4-fluoroanilino)propionic acid isopropylester) from S-(-)-isopropyl lactate mesylate and 3-chloro-4-fluoroaniline followed by benzoylation. The compounds are very active herbicides against broad-leafed weeds (R=H) or wild oats (R=(thio)benzoyl).

Growing community of inventors

Sittingbourne, United Kingdom

Richard Mark Scott