US 4,938,881 A · Lubricating oil compositions and concentrates

Abstract

Lubricating oil compositions for internal combustion engines are described with comprise (A) a major amount of oil of lubricating viscosity, and minor amounts of (B) at least one carboxylic derivative composition produced by reacting (B-1) at least one substituted succinic acylating agent with (B-2) acylating agent of at least one amine compound characterized by the presence within its structure of at least one NH< group, and wherein the substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, (C) at least one basic alkali metal salt of sulfonic or carboxylic acid, and (D) at least one metal salt of a dihydrocarbyl dithiophosphoric acid. The oil compositions also may contain (E) at least one carboxylic ester derivative compositions, and/or (F) at least one neutral or basic alkaline earth metal salt of at least one acidic organic compound and/or (G) at least one partial fatty acid ester of a polyhydric alcohol.

Claims46

Dependent claims

A lubricating oil composition for internal combustion engines which comprises:

(A) a major amount of oil of lubricating viscosity, and minor amounts of
(B) at least one carboxylic derivative composition produced by reacting
(B-1) at least one substituted succinic acylating agent with
(B-2) from one equivalent up to two moles, per equivalent of acylating agent, of at least one amine compound characterized by the presence within its structure of at least one HN<
group wherein said substituted succinic acylating agents consist of substituent groups and succinic groups wherein the substituent groups are derived from polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw,/Mn value of about 1.5 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups,
(C) at least one basic alkali metal salt of a sulfonic or carboxylic acid, and
(D) at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
(D-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least 10 mole percent of isopropyl alcohol, secondary butyl alcohol, or a mixture of isopropyl and secondary butyl alcohols, and at least one primary aliphatic alcohol containing from about 3 to about 13 carbon atoms, and
(D-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper.

6 more elements

A lubricating oil composition for internal combustion engines which comprises

(A) a major amount of oil of lubricating viscosity,
(B) from about 0.5% to about 10% by weight of at least one carboxylic derivative composition produced by reacting
(B-1) at least one substituted succinic acylating agent with from 1 equivalent up to about 2 moles, per equivalent of acylating agent, of
(B-2) at least one polyamine characterized by the presence within its structure of at least one HN<
group wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 2 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups,
(C) from about 0.01 to about 2% by weight of at least one basic alkali metal salt of an organic sulfonic acid,
(D) from about 0.05 to about 5% by weight of at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
(D-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least 10 mole percent of isopropyl alcohol, secondary butyl alcohol, or a mixture thereof, and at least one primary aliphatic alcohol containing from about 3 to about 13 carbon atoms, and
(D-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper,
(E) 0.1 to about 10% of at least one carboxylic ester derivative composition produced by reacting
(E-1) at least one substituted succinic acylating agent comprising substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of from about 1.5 to about 4.5, said acylating agents being characterized by the presence within their structure of at least about 1.3 succinic groups for each equivalent weight of substituent group with
(E-2) at least one alcohol of the general formula
R.sup.3 (OH).sub.m (X)
wherein R.sup.3 is a monovalent or polyvalent organic group joined to the -OH groups through carbon bonds, and m is an integer of from 2 to about 10, and
(E-3) at least one polyamine compound containing at least one >NH group, and
(F) from about 0.01 to about 5% by weight of at least one alkaline earth metal salt of an organic acid compound selected from the group consisting of sulfur acids, carboxylic acids, phosphorus acids, phenols, and mixtures of said acids.

13 more elements

A lubricating oil composition for internal combustion engines which comprises

(A) a major amount of oil of lubricating viscosity,
(B) from about 1% to about 10% by weight of at least one carboxylic derivative composition produced by reacting
(B-1) at least one substituted succinic acylating agent with from 1.0 to about 1.5 equivalents, per equivalent of acylating agent, of
(B-2) at least one polyamine characterized by the presence within its structure of at least one HN<
group wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 2 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups,
(C) from about 0.05 to about 2% by weight of an overbased sodium alkylbenzene sulfonate having a metal ratio of from about 2 to about 30,
(D) from about 0.05 to about 5% by weight of at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
(D-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least about 20 mole percent of isopropyl alcohol and at least one primary aliphatic alcohol containing from about 6 to about 13 carbon atoms, and
(D-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper,
(E) 0.1 to about 10% of at least one carboxylic ester derivative composition produced by reacting
(E-1) at least one substituted succinic acylating agent comprising substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of from about 1.5 to about 4.5, said acylating agents being characterized by the presence within their structure of at least about 1.3 succinic groups for each equivalent weight of substituent group with
(E-2) from about 0.1 to about 2 moles, per mole of acylating agent of at least one polyhydroxy compound selected from the group consisting of neopentyl glycol, ethylene glycol glycerol, pentaerythritol, sorbitol, mono-alkyl or mono-aryl ethers of a poly(oxyalkylene)glycol or mixtures of any two or more of these, and
(E-3) at least one polyamine containing at least one >NH group, and
(F) from about 0.01 to about 5% by weight of at least one alkaline earth metal salt of an organic acid compound selected from the group consisting of sulfonic acids, carboxylic acids, phenols, and mixtures of said acids.

11 more elements

A concentrate for formulating lubricating oil compositions comprising from about 20 to about 90% by weight of a normally liquid, substantially inert organic diluent/solvent,

(B) from about 10 to about 50% by weight of at least one carboxylic derivative composition produced by reacting
(B-1) at least one substituted succinic acylating agent with at least one equivalent, per equivalent of acylating agent, of
(B-2) at least one amine characterized by the presence within its structure of at least one HN<
group wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 1.5 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups,
(C) from about 0.1 to about 15% by weight of at least one basic alkali metal salt of an organic sulfonic or carboxylic acid, and
(D) from about 0.001 to about 15% by weight of at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
(D-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least 10 mole percent of isopropyl alcohol, secondary butyl alcohol, or a mixture of isopropyl and secondary butyl alcohols, and at least one primary aliphatic alcohol containing from about 3 to about 13 carbon atoms, and
(D-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper.

5 more elements

Dependencies are inferred from the claim text.

Lubricating oil compositions and concentrates

Life of this patent

Lubricating oil compositions and concentrates

Life of this patent

Abstract

Claims46