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US 4,906,392 AGranted
Coupled polyamine lubricant additives derived from hydrocarbyl polynitriles and polyamines
AssigneeThe Lubrizol Corporation
InventorPaul E. Adams
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Abstract
Coupled polyamine additives for lubricants, fuels and functional fluids have been discovered. The coupled polyamines are prepared by the cyclization reaction of at least one reactant polyamine reactant with at least one hydrocarbyl polynitrile. This coupled polyamine may be further reacted with a hydrocarbyl carboxylic acid or derivative thereof, a hydrocarbyl phenolic reactant or mixtures thereof to provide an additive having greater oil solubility as well as imparting disperancy and VI improvement.
Claims4
A lubricating composition, comprising:
- a major amount of an oil of lubricating viscosity and a minor amount of a coupled polyamine composition prepared by the reaction of a hydrocarbyl polynitrile with a polyamine reactant wherein the hydrocarbyl polynitrile is capable of a cyclization reaction with the polylamine reactant to form a coupled polyamine.
Dependencies are inferred from the claim text.