Functionalized olefin copolymer additives
AssigneesEthyl Corporation, Dsm N.V.
InventorsCarl Kurt Esche, Jr., Anthony J. Rollin, Mark Thomas Devlin
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Abstract
This invention relates to a novel multi-functional fuel and lubricant additive that provides dispersancy properties as well as viscosity index improved credit, improved fuel economy and low temperature viscometric properties. The invention further relates to concentrates, fuel and lubricating oil compositions containing said additive.
Claims39
A process for preparing a functionalized olefin copolymer comprising the steps of:
- (1) preparing an oil or solvent solution of an acylated olefin copolymer,
- (2) preparing a solution of at least one performance enhancing compound at a concentration of from 5 to 40 weight percent in surfactant,
- (3) preparing a solution of at least one coupling compound at a concentration of from 5 to 40 weight percent in surfactant, wherein said coupling compound contains more than one amino, hydroxy and/or thiol group capable of reacting with the carboxylic group of the acylated olefin copolymer, and mixing and heating the solutions (1), (2) and (3) in any order or simultaneously at a temperature of 120.degree. to 200.degree. C. for a time sufficient to effect reaction of the amino, hydroxy or thiol group of the performance enhancing compound and the coupling compound with the carboxylic group of the acylated olefin copolymers and to effect coupling of at least two acylated olefin copolymers;
- wherein said coupling compound is selected from the group consisting of organic polyamines, polyalcohols, polyhydroxy or thiol amines, amide-amines and amino guanidines;
- and wherein the performance enhancing compound is selected from the group consisting of monoamines, sterically hindered polyamines, heterocyclic thiols and hydroxyamines;
- and wherein said surfactant is selected from the reaction products of aliphatic and aromatic hydroxy compounds with ethylene oxide, propylene oxide or mixtures thereof.
A functionalized olefin copolymer comprising the reaction product of a) an acylated olefin copolymer, wherein said acylated olefin copolymer comprises an olefin copolymer substrate grafted with from about 0.5 to about 6 molecules of ethylenically unsaturated carboxylic acid, or derivative thereof, per molecule of olefin copolymer;
- b) at least one coupling compound, wherein said coupling compound contains more than one amine, thiol and/or alcohol functionality capable of reacting with the acylated olefin copolymer and is selected from the group consisting of mixtures of 2,4- and 2,6-isomers of dimethylthiotoluene diamine, polyhydroxy amines, and amino guanidines;
- and c) an aromatic amine performance enhancing compound selected from the group consisting of aryl polyamines, aminocarbazoles, aminoindoles, aminopyrroles, amino-indazolinones, aminoperimidines, mercaptotriazoles, aminophenothiazines, pyridines, pyrazines, pyrimidines, aminothiadiazoles, aminothiothiadiazoles, aminobenzotriazoles, mercaptobenzothiazoles, and mercaptobenzoimidazoles;
- and wherein the acylated olefin copolymer is reacted with from 0.5 to 85 mol % coupling compound and 15 to 99.5 mol % performance enhancing compound per mol of acylating agent.
A functionalized olefin copolymer comprising the reaction product of a) an acylated olefin copolymer, wherein said acylated olefin copolymer comprises an olefin copolymer substrate grafted with from about 0.5 to about 6 molecules of ethylenically unsaturated carboxylic acid, or derivative thereof, per molecule of olefin copolymer;
- b) at least one coupling compound, wherein said coupling compound contains more than one amine, thiol and/or alcohol functionality capable of reacting with the acylated olefin copolymer and is selected from the group consisting of organic polyamines, polyalcohols, polyhydroxy or thiol amines, amide-amines and amino guanidines;
- and c) an aromatic amine performance enhancing compound selected from the group consisting of:
- aryl polyamines, aminocarbazoles, aminoindoles, aminopyrroles, amino-indazolinones, aminoperimidines, mercaptotriazoles, aminophenothiazines, pyridines, pyrazines, pyrimidines, aminothiadiazoles, aminothiothiadiazoles, aminobenzotriazoles, mercaptobenzothiazoles, and mercaptobenzoimidazoles;
- and wherein the acylated olefin copolymer is reacted with from 0.5 to 85 mol% coupling compound and 15 to 99.5 mol% performance enhancing compound per mol of acylating agent.
A process for preparing a functionalized olefin copolymer comprising the steps of reacting an acylating olefin copolymer having a number average molecular weight of from 700 to 500,000 and having 0.5 to 6 molecules of carboxylic reactant per molecule olefin copolymer with an aromatic amine performance enhancing compound and a coupling compound at a temperature in the range of 120.degree. to 200.degree. C., wherein the reaction of the acylated olefin polymer with the coupling compound is before, after or simultaneous with reaction of the performance enhancing compound and the acylated olefin copolymer;
- wherein said coupling compound is selected from the group consisting of mixtures of 2,4- and 2,6-isomers of dimethylthiotoluene diamine, polyhydroxy amines, and amino guanidines;
- and wherein the performance enhancing compound is selected from the group consisting of aryl polyamines, aminocarbazoles, aminoindoles, aminopyrroles, amino-indazolinones, aminoperimidines, mercaptotriazoles, aminophenothiazines, pyridines, pyrazines, pyrimidines, aminothiadiazoles, aminothiothiadiazoles, aminobenzotriazoles, mercaptobenzothiazoles, and mercaptobenzoimidazoles;
- and wherein the acylated olefin copolymer is reacted with from 0.5 to 85 mol % coupling compound and 15 to 99.5 mol % performance enhancing compound per mol of acylating agent.
Dependencies are inferred from the claim text.