Back to results
US 4,357,250 AGranted
Nitrogen-containing terpolymer-based compositions useful as multi-purpose lubricant additives
AssigneeThe Lubrizol Corporation
InventorKatsumi Hayashi
Life of this patent
Estimating the term…
Abstract
Compositions useful as dispersants and viscosity modifiers in lubricants are produced by (I) preparing an ene reaction intermediate from an olefinic carboxylic acid or derivative thereof (preferably maleic anhydride) and a terpolymer of ethylene, a C.sub.3-8 .alpha.-monoolefin and a non-conjugated diene or triene, and (II) reacting said ene reaction intermediate with a monoamine-polyamine mixture.
Claims30
A method for preparing an oil-soluble composition which comprises the steps of:
- (I) preparing an ene reaction intermediate by reacting, in the absence of free radical initiators,
- (A) at least one olefinic carboxylic acid or derivative thereof with
- (B) at least one interpolymer containing
- (1) about 10 to about 90 mole percent ethylene units,
- (2) about 5 to about 70 mole percent of units derived from at least one C.sub.3-8 .alpha.-monoolefin, and
- (3) about 0.1 to about 20 mole percent of units derived from at least one of non-conjugated dienes and trienes,
- said interpolymer having an inherent viscosity of at least about 0.3 as measured at 30.degree. C. on a 0.1% by weight solution in carbon tetrachloride;
- and
- (II) reacting said ene reaction intermediate with
- (C) at least one monoamine containing one and only one acylatable moiety per molecule, said acylatable moiety being a primary or secondary amine group;
- and
- (D) at least one polyamine containing two or more acylatable moieties;
- at least about 70% by weight of the total amines present comprising reagent C.
10 more elements
A method for preparing an oil-soluble composition which comprises the steps of:
- (I) preparing an ene reaction intermediate by reacting, in the absence of free radical initiators and at a temperature from about 180.degree. to about 250.degree. C., (A) maleic anhydride with (B) at least one interpolymer containing (1) about 40 to about 60 mole percent ethylene units, (2) about 40 to about 60 mole percent propylene units, and (3) about 2 to about 10 mole percent 1,4-hexadiene units, said interpolymer having an inherent viscosity of about 0.5 to about 5.0 as measured at 30.degree. C. on a 0.1% by weight solution in carbon tetrachloride;
- and
- (II) reacting said ene reaction intermediate at a temperature between about 100.degree. and about 280.degree. C. with a mixture of (C) N-(3-aminopropyl)morpholine and (D) at least one ethylene polyamine, said mixture comprising at least about 80% by weight of N-(3-aminopropyl)morpholine.
Dependencies are inferred from the claim text.