Polymeric dispersants and method of making same
AssigneeEthyl Corporation
InventorsDaniel Y. F. Yu, Carl A. Mike
Life of this patent
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Abstract
This invention concerns the utilization of polymeric compounds generated from Mannich base macromonomers as lubricant oil and fuel additives or intermediates to such additives. Requisite macromonomers are generated via Mannich reaction of high molecular weight alkyl phenols and unsaturated amines. Homopolymers of the Mannich base macromonomers or copolymers with activated unsaturated monomers, such as maleic anhydride, are of particular interest as crankcase dispersants. For example, functionalization of Mannich base macromonomer/maleic anhydride copolymers with amines affords effective crankcase dispersants. Such polymeric dispersants are designed to impart superior sludge protection and improved viscometrics to lubricant oils.
Claims12
A composition of matter comprising a polymer (C), said polymer (C) of the chemical structure:
- ##STR11## wherein n is 1 or greater, wherein X is a polyolefin of olefin monomers, said olefin monomers having from 2 to 6 carbons, of sufficient size so as to render said polymer (C ) oil soluble, and wherein R is selected from the group consisting of basic salts of aminoguanidine, amines, polyamines, alcohols, and polyols;
- wherein said amines, polyamines, alcohols, and polyols comprise a carbon chain containing from about 0 to 10 amine nitrogen atoms and from about 2 to 40 carbon atoms.
Dependencies are inferred from the claim text.