A lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene α-olefin copolymer having no greater than 66 mass % of units derived from ethylene, and a linear diblock copolymer including at least one block derived primarily from a vinyl aromatic hydrocarbon monomer, and at least one block derived primarily from diene monomer.

Lubricating oil compositions.

The invention pertains to oil soluble copolymers derived from ethylene and 1-butene which have a number average molecular weight between about 1,500 and 7,500, at least about 30 percent of all polymer chains terminated with ethylvinylidene groups, and ethylene-derived content of not greater than about 50 weight percent, and which form solutions in mineral oil free of polymer aggregates, as determined by light scattering measurements. Lubricating oil additives, particularly dispersants, produced by the functionalization and derivatization of these copolymers have enhanced performance (e.g., improved dispersancy and pour point) in lubricating oil compositions, attributable in part to the combination of properties characterizing the copolymers.

Polymers derived from ethylene and 1-butene for use in the preparation of lubricant dispersant additives

Oil soluble high molecular weight Mannich condensation products formed by reacting (1) high molecular weight alkyl-substituted hydroxy aromatic compounds whose alkyl-substituent has a number average molecular weight (Mn) from about 600-100,000, (2) a compound containing at least one HN < group, and (3) an aldehyde in the respective molar reactant ratio of 1:0.1-10:1.0-10, are highly efficient ashless type (metal free) dispersant-detergent lubricant oil addition agents. Lubricating oils containing these compositions provide a high degree of protection against the deposition of sludge and varnish and corrosion when used as crankcase lubricants. Bis-Mannich products prepared by condensing (1) a 850-2500 Mn polyalkyl-substituted phenol, (2) an alkylene polyamine and (3) formaldehyde in the respective molar ratio of 1.0:0.7-1.0:1.5-2.1 are novel products and are especially effective for high severity detergent-dispersant function over the extended oil drain range of crankcase lubricant oils recommended by automobile manufacturers.

Lubricating oils containing high molecular weight Mannich condensation products

A lubricating oil composition having improved properties comprises a major proportion by weight of a lubricating oil, a dispersant compound, from 0.01 to 0.5 wt % phosphorus and zinc and 5 to 500 parts per million of copper, and additive concentrates for blending with oil to produce such lubricating oil compositions.

Lubricating oil compositions containing ashless dispersant, zinc dihydrocarbyldithiophosphate, metal detergent and a copper compound

Compositions useful as lubricant and fuel dispersants are prepared by reacting an intermediate (A) of the formulae ##STR1## wherein each R is hydrogen or a lower hydrocarbon-based group, Ar is an aromatic moiety having at least one aliphatic substituent of at least 6 carbon atoms and x is 1 to about 10, with an amino compound (B) which contains one or more amino groups having hydrogen bonded directly to an amino nitrogen.

Nitrogenous dispersants, lubricants and concentrates containing said nitrogenous dispersants

High molecular weight Mannich condensation products of (1) high molecular weight alkyl-substituted hydroxyaromatic compounds whose alkyl substituent has upward from 40 to 20,000 carbon atoms, (2) an amine which contains an AND (3) AN ALDEHYDE IN THE RESPECTIVE REACTANT MOLAR RATIO OF 1: 0.1-10:1.0-10 CONDENSED WITH A BORON COMPOUND ARE NOVEL DISPERSANT-DETERGENT LUBRICANT OIL ADDITION AGENTS. Solutions of those addition agents in lubricant oil are novel and unique compositions affording anti-sludge and varnish deposition and corrosion inhibition.

Boron derivatives of high molecular weight mannich condensation products

THIS INVENTION CONCERNS THE CONDENSATION PRODUCT OF A HIGHER MOLECULAR WEIGHT ALKYL-SUBSTITUTED PHENOL, AN ALKYLENE POLYAMINE, FORMALDEHYDE, AND AN ALDEHYDE REACTANT HAVING MORE THAN ONE CARBON ATOM OR KETON REACTANT OR A MIXTURE OF BOTH REACTANTS. THESE PRODUCTS ARE USEFUL AS ASHLESS DISPERSANTS FOR LUBRICANTS.

alkylene polyamide formaldehyde

OIL-SOLUBLE BORON-CONTAINING DERIVATIVES OF PRODUCTS OF MANNICH CONDENSATION FROM REACTANTS (1) A HIGH MOLECULAR WEIGHT ALKYL-SUBSTITUTED HYDROXYAROMATIC COMPOUND WHOSE ALKYL SUBSTITUENT HAS UPWARD FROM 40 TO 20,000 CARBON ATOMS, (2) A LOWER ALKYL-SUBSTITUTED PHENOL WHOSE ALKYL GROUP HAS 2 TO 20 CARBON ATOMS, (3) AN AMINE WHICH CONTAINS AN HN<GROUP, AND (4) AN ALDEHYDE IN THE RESPECTIVE MOLAR RATIO OF 1.0:0-7:0.1-10:1.0-10 WHEREIN THE BORON CONTENT EXPRESSED AS A BORON TO NITROGEN WEIGHT RATIO (B/N) IS IN THE RANGE OF 0.15-5:1.0. THE BORON DERIVATIVES AS SOLUTES IN WEIGHT CONCENTRATIONS OF 0.05 TO 70 PERCENT DISSOLVED IN MINERAL OIL OF THELUBRICATING OIL TYPES ARE USEFUL AS CRANKCASE LUBRICATING COMPOSITIONS, CONCENTRATES FOR FORTIFYING USED CRANKCASE LUBRICATING COMPOSITION AND FOR PREPARATION OF CRANKCASE LUBRICATING COMPOSITIONS. THOSE BORON DERIVATIVES PROVIDE DETERGENCY, DISPERSANCY AND ANTI-OXIDANT PROPERTIES TO LUBRICATING OILS.

Robert E Karll

Papers

Boron derivatives of high molecular weight mannich condensation products

alkylene polyamide formaldehyde

Lubricating oils containing high molecular weight Mannich condensation products

Boron-containing high molecular weight mannich condensation

Di-hydroxybenzyl polyamines