NEW ETHYLENE-ALPHA-OLEFIN POLYMER-SUBSTITUTED MANNICH BASE LUBRICANT-DISPERSING ADDITIVE

摘要

PROBLEM TO BE SOLVED: To use a Mannich base condensation product obtd. by reacting a hydroxyarom. compd. alkylated with a specific ethylene-α-olefin copolymer with an aldehyde reactant and an amine as an oil-soluble lubricant additive exhibiting a high sludge- and varnish-controlling capability and a high lubricant- dispersing capability. SOLUTION: A Mannich base condensation product obtd. by reacting the following three reactants A, B, and C is used as a lubricant-dispersing additive useful in an oil-base compsn.: (A) at least one alkylated hydroxyarom. compd. prepd. by alkylating at least one hydroxyarom. compd. with at least one terminal-unsatd. ethylene-α-olefin copolymer which has a number average mol.wt. of 300-10,000 and of which at least 30% of the polymer chains contain terminal ethenylidene unsaturations; (B) at least one aldehyde; and (C) at least one amine.