Lubricating oil additives, their preparation and use
AssigneeBP Chemicals (Additives) Limited
InventorWilliam D. Carlisle
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Abstract
A lubricating oil soluble compound suitable for use as a dispersant additive is obtainable by reacting at elevated temperature a polyacrylate with a dispersant having at least one reactive nitrogen--containing moiety. Intermediates of the general formula IV ##STR1## where Y.sup.1 is a group derived from the reaction of the polyacrylate with the reactive nitrogen-containing moieties (i.e. primary or secondary amine) are novel. The process for preparing the lubricating oil soluble compounds can be a one step or multistep process. Lubricating oil compositions comprise a major proportion of lubricating oil and a minor proportion of the lubricating oil soluble compounds.
Claims4
An oil soluble compound suitable for use as a dispersant additive which compound is obtainable by reacting at elevated temperature a dispersant which is a long chain hydrocarbon having a polyamine attached directly thereto with either a polyacrylate or a polyacrylamide having the formula (III):
- ##STR8## wherein R.sup.3 is alkylene, arylene glycol, or alkylene acrylate, R.sup.4 and R.sup.5 are independently either hydrogen or a hydrocarbyl moiety, and Z.sup.1 and Z.sup.2 are independently either -O- or =NR.sup.6, where R.sup.6 is hydrogen, methyl or ethyl.
Dependencies are inferred from the claim text.