Lubricating composition containing a carboxylic functionalised polymer and dispersant
AssigneeThe Lubrizol Corporation
InventorsMatthew D. Gieselman, John K. Pudeiski, Mary Galic Raguz, Thomas Derevjanik
Life of this patent
Estimating the term…
Abstract
The invention provides an oil of lubricating viscosity, a dispersant and an amine-functionalised additive, wherein the amine-functionalised additive is derived from an amine having at least 3 or 4 aromatic groups. The invention further relates to the use of the lubricating composition in an internal combustion engine.
Claims33
A lubricating composition comprising an oil of lubricating viscosity, a dispersant and an amine-functionalised additive, wherein the amine-functionalised additive is derived from an amine having at least 4 aromatic groups,
- wherein the amine-functionalised additive is a product obtained by reacting the amine having at least 4 aromatic groups with a carboxylic functionalised polymer,
- wherein the amine having at least 4 aromatic groups is represented by the formula:
- wherein independently each variable
- R1 is hydrogen or a C1-5 alkyl group;
- R2 is hydrogen or a C1-5 alkyl group;
- U is an aliphatic, alicyclic or aromatic group, with the proviso that when U is aliphatic, the aliphatic group may be a linear or branched alkylene group containing 1 to 5 carbon atoms;
- and
- w is 1 to 10.
A lubricating composition comprising an oil of lubricating viscosity, a dispersant and an amine-functionalised additive, wherein the amine-functionalised additive is derived from an amine having at least 3 aromatic groups,
- wherein the amine-functionalised additive is a product obtained/obtainable by reacting the amine having at least 3 aromatic groups with a carboxylic functionalised polymer, wherein the amine-functionalised additive is derived from an amine having at least 3 aromatic groups obtained/obtainable by a process comprising reacting:
- (1) isatoic anhydride or alkyl substituted isatoic anhydride and (2) an aromatic amine with at least two aromatic groups and a primary or a reactive secondary amino group.
Dependencies are inferred from the claim text.