EP0535217A1 - Schmierölzusammensetzungen. - Google Patents
Schmierölzusammensetzungen.Info
- Publication number
- EP0535217A1 EP0535217A1 EP92911546A EP92911546A EP0535217A1 EP 0535217 A1 EP0535217 A1 EP 0535217A1 EP 92911546 A EP92911546 A EP 92911546A EP 92911546 A EP92911546 A EP 92911546A EP 0535217 A1 EP0535217 A1 EP 0535217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composition
- dispersant
- overbased
- acid
- lubricating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M167/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, each of these compounds being essential
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/04—Hydroxy compounds
- C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/68—Esters
- C10M129/76—Esters containing free hydroxy or carboxyl groups
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- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
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- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/16—Amides; Imides
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- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
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- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/02—Sulfurised compounds
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- C10M135/30—Thiols; Sulfides; Polysulfides containing sulfur atoms bound to a carbon atom of a six-membered aromatic ring containing hydroxy groups; Derivatives thereof
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- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
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- C10M137/10—Thio derivatives
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- C10M155/02—Monomer containing silicon
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- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
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- C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
Definitions
- This invention relates to lubricating oil compo ⁇ sitions containing overbased alkali metal salts of at least one acidic organic compound, at least one dispersant, at least one metal dithiophosphate, at least one antioxidant, and at least one magnesium overbased metal salt of an acidic organic compound.
- Alkaline earth metal detergents are used to suspend degradation products in a motor oil and to neutral- ize acid products within the oil of engines.
- the alkaline earth metal is a calcium detergent and particular ⁇ ly a calcium overbased sulfonate or a calcium phenate.
- Canadian Patent 1,055,700 relates to basic alkali sulfonate dispersions and processes.
- U.S. Patent 4,326,972 relates to concentrates, lubricant compositions and methods for improving fuel economy of internal combustion engines. These compositions have as an essential ingredient a specific sulfurized composition and a basic alkali metal sulfonate.
- U.S. Patent 4,904,401 relates to lubricating oil compositions. These compositions may contain a basic alkali metal salt of at least one sulfonic or carboxylic acid.
- U.S. Patent 4,938,881 relates to lubricating oil compositions and concentrates. These compositions and concentrates include at least one basic alkali metal salt of sulfonic or carboxylic acid.
- Patent 4,952,328 relates to lubricating oil compositions. These composi ⁇ tions contain from about 0.01% to about 2% by weight of at least one basic alkali metal salt of sulfonic or carboxylic acid.
- the invention relates to a lubricating oil composition, comprising: a major amount of an oil of lubricating viscosi ⁇ ty; and (A) an amount of at least one alkali metal overbased salt of an acidic organic compound to provide at least about 0.0019 equivalents of alkali metal per 100 grams of the lubricating composition;
- hydrocarbyl includes hydrocarbon, as well as substantially hydrocarbon, groups.
- Substantially hydrocarbon describes groups which contain non-hydrocarbon substituents which do not alter the predominately hydrocar- bon nature of the group. Examples of hydrocarbyl groups include the following:
- hydrocarbon substituents that is, aliphatic (e.g., alkyl or alkenyl) , alicyclic (e.g., cycloalkyl, cycloalkenyl) substituents, aromatic-, aliphatic- and alicyclic-substituted aromatic substituents and the like as well as cyclic substituents wherein the ring is completed through another portion of the molecule (that is, for example, any two indicated substituents may together form an alicyclic radical) ;
- substituted hydrocarbon substituents that is, those substituents containing non-hydrocarbon groups which, in the context of this invention, do not alter the predominantly hydrocarbon substituent; those skilled in the art will be aware of such groups (e.g., halo (especially chloro and fluoro) , hydroxy, alkoxy, mercapto, alkylmer- capto, nitro, nitroso, sulfoxy, etc.);
- hetero substituents that is, substituents which will, while having a predominantly hydrocarbon character within the context of this invention, contain other than carbon present in a ring or chain otherwise composed of carbon atoms.
- Suitable heteroatoms will be apparent to those of ordinary skill in the art and include, for example, sulfur, oxygen, nitrogen and such substituents as, e.g., pyridyl, furyl, thienyl, imidazolyl, etc.
- no more than about 2, preferably no more than one, non-hydrocarbon substituent will be present for every ten carbon atoms in the hydrocarbyl group. Often, there will be no such non-hydrocarbon substituents in the hydrocarbyl group and the hydrocarbyl group is purely hydrocarbon.
- an equivalent weight of an amine or a polyamine is the molecu- lar weight of the amine or polyamine divided by the total number of nitrogens present in the molecule.
- the number of equivalents of the acylating agent depends on the total number of carboxylic functions present.
- the equivalent weight of a hydroxyamine used to form carboxylic ester derivatives is its molecular weight divided by the number of hydroxyl groups present, and the nitrogen atoms present are ignored.
- An equivalent weight of a hydroxy-substituted amine to be reacted with the acylating agents to form carboxylic amine derivatives is its molecular weight divided by the total number of nitrogen groups present in the molecule.
- An equivalent weight of polyhydric alcohol is its molecular weight divided by the total number of hydroxyl groups present in the molecule.
- acylating agent or “substituted succinic acylating agent” are to be given their normal meanings.
- a substituent is an atom or group of atoms that has replaced another atom or group in a molecule as a result of a reaction.
- acylating agent or substituted succinic acylating agent refers to the compound per se and does not include unre- acted reactants used to form the acylating agent or substi ⁇ tuted succinic acylating agent.
- the present lubricating compositions contain A) an alkali metal overbased salt of an acidic organic com ⁇ pound.
- the overbased salts are single phase, homogeneous, Newtonian systems characterized by a metal content in excess of that which would be present according to the stoichiometry of the metal and the particular organic compound reacted with the metal. The amount of excess metal is commonly expressed in terms of metal ratio.
- the term "metal ratio" is the ratio of the total equivalents of the metal to the equivalents of the acidic organic com ⁇ pound.
- a salt having 4.5 times as much metal as present in a normal salt will have metal excess of 3.5 equivalents, or a ratio of 4.5.
- these salts preferably have a metal ratio from about 1.5 to about 40, preferably about 3 to about 30, more preferably about 3 to about 25.
- the overbased materials are prepared by reacting an acidic material, typically carbon dioxide, with a mixture comprising an acidic organic compound, a reaction medium comprising at least one inert, organic solvent for said organic material, a stoichiometric excess of the metal compound, typically a metal hydroxide or oxide, and a promoter.
- the basic alkali metal salts are prepared by reacting water with a mixture com ⁇ prising an acidic organic compound, a reaction medium and a promoter.
- the acidic organic compounds are selected from the group consisting of: carboxylic acids, sulfonic acids, phosphorus acids, phenols and derivatives thereof.
- the overbased materials are prepared from carboxylic acids or sulfonic acids.
- the carboxylic and sulfonic acids may have substituent groups derived from polyalkenes.
- the polyalkene is characterized as containing from at least about 8 carbon atoms, preferably at least about 30, more preferably at least about 35 up to about 300 carbon atoms, preferably 200, more preferably up to about 100.
- the polyalkene is characterized by an Mn (number average molecular weight) value of at least about 400, preferably about 500.
- the polyalkene is characterized by an Mn value of about 500, preferably about 700, more preferably about 800, still more preferably about 900 up to about 5000, preferably up to about 2500, more preferably up to about 2000, still more preferably up to about 1500.
- Mn varies between about 500, preferably about 700, more preferably about 800 up to about 1200 or 1300.
- Mn is the conventional symbol representing number average molecular weight.
- GPC Gel perme- ation chromatography
- the polyalkenes include homopolymers and inter- polymers of polymerizable olefin monomers of 2 to about 16 carbon atoms; usually 2 to about 6, preferably 2 to about 4, more preferably 4.
- the olefins may be monoolefins such as ethylene, propylene, 1-butene, isobutene, and 1-octene; or a polyolefinic monomer, preferably diolefinic monomer, such 1,3-butadiene and isoprene.
- the inter- polymer is a homopolymer.
- An example of a preferred homopolymer is a polybutene, preferably a polybutene in which about 50% of the polymer is derived from isobutylene.
- the polyalkenes are prepared by conventional procedures.
- Suitable carboxylic acids from which useful alkali metal salts can be prepared include aliphatic, cycloaliphatic and aromatic mono- and polybasic carboxylic acids free from acetylenic unsaturation, including naph- thenic acids, alkyl- or alkenyl-substituted cyclopentanoic acids, and alkyl- or alkenyl-substituted cyclohexanoic acids, preferably alkenyl-substituted succinic acids or anhydrides.
- the aliphatic acids generally contain from about 8 to about 50, and preferably from about 12 to about 25 carbon atoms.
- the cycloaliphatic and aliphatic carbox ⁇ ylic acids are preferred, and they can be saturated or unsaturated.
- Illustrative carboxylic acids include 2-ethyl- hexanoic acid, palmitic acid, stearic acid, myristic acid. oleic acid, linoleic acid, behenic acid, hexatriacontanoic acid, tetrapropylenesubstituted glutaric acid, polybutenyl substituted succinic acid derived from polybutene (Mn equals about 200-1500, preferably about 300-1500, more preferably about 800-1200) , polypropylene substituted succinic acid derived from polypropene (Mn equal 200-2000, preferably about 300-1500, more preferably about 800-1200) , acids formed by oxidation of petrolatum or of hydrocarbon waxes, commercially available mixtures of two or more carboxylic acids such as tall oil acids, and rosin acids, octadecyl-substituted adipic acid, chlorostearic acid, 9-methylstearic acid,
- the carboxylic acid is an alkyloxyalkylene-aceti ⁇ acid or alkylphenoxy-acetic acid, more preferably alkylpolyoxyalkylene-acetic acid or salts thereof.
- iso-stearylpentaethyleneglycolacetic acid iso- stearyl-O-(CH 2 CH 2 0) 5 CH 2 C0 2 Na; lauryl-O-(CH 2 CH 2 0) 25 CH 2 C0 2 H; lauryl-O-(CH 2 CH 2 0) 3-3 CH 2 C0 2 H; oleyl-O-(CH 2 CH 2 0) 4 CH 2 C0 2 H; lauryl-0- (CH 2 CH 2 0) 4-5 CH 2 C0 2 H; lauryl-O-(CH 2 CH 2 0) 10 CH 2 CO 2 H; lauryl-O-(CH 2 - CH 2 0) 16 CH 2 C0 2 H; octy1-pheny
- the carboxylic acids are aromatic carboxylic acids.
- a group of useful aromatic carboxylic acids are those of the formula wherein R, is an aliphatic hydrocarbyl group preferably derived from the above-described polyalkenes, a is a number in the range of 0 to about 4, usually 1 or 2, Ar is an aromatic group, each X is independently sulfur or oxygen, preferably oxygen, b is a number in the range of from 1 to about 4, usually from 1 to 2, c is a number in the range of zero to about 4, usually 1 to 2, with the proviso that the sum of a, b and c does not exceed the number of valences of Ar.
- aromatic acids include substituted and non-substituted benzoic, phthalic and salicylic acids.
- the R, group is a hydrocarbyl group that is directly bonded to the aromatic group Ar.
- R, groups include substituents derived from polymerized ole ins such as polyethylenes, polypropylenes, polyiso- butylenes, ethylene-propylene copolymers, chlorinated olefin polymers and oxidized ethylene-propylene copolymers.
- the aromatic group Ar may have the same structure as any of the aromatic groups Ar discussed below. Examples of the aromatic groups that are useful herein include the polyvalent aromatic groups derived from benzene, naph ⁇ thalene, anthracene, etc. , preferably benzene.
- Ar groups include phenylenes and naphthylene, e.g., methylphenylenes, ethoxyphenylenes, isopropylphenyl- enes, hydroxyphenylenes, dipropoxynaphthylenes, etc.
- a is a number in the range of from zero to about 4, preferably 1 to about 3; b is a number in the range of 1 to about 4, preferably 1 to about 2, c is a number in the range of zero to about 4, prefera ⁇ bly 1 to about 2, and more preferably 1; with the proviso that the sum of a, b and c does not exceed 6.
- b and c are each one and the carboxylic acid is a salicylic acid.
- the salicylic acids preferably are aliphatic hydrocarbon-substituted salicyclic acids.
- the above aromatic carboxylic acids are well known or can be prepared according to procedures known in the art.
- Carboxylic acids of the type illustrated by these formulae and processes for preparing their neutral and basic metal salts are well known and disclosed, for exam- pie, in U.S. Patents 2,197,832; 2,197,-835; 2,252,662; 2,252,664; 2,714,092; 3,410,798; and 3,595,791.
- the sulfonic acids are preferably mono-, di-, and tri-aliphatic hydrocarbon-substituted aromatic sulfonic acids.
- the hydrocarbon-substituent may be derived form any of the above-described polyalkenes.
- Such sulfonic acids include mahogany sulfonic acids, bright stock sulfonic acids, petroleum sulfonic acids, mono- and polywax-substi- tuted naphthalene sulfonic acids, cetylchlorobenzene sulfonic acids, cetylphenol sulfonic acids, cetylphenol disulfide sulfonic acids, cetoxycapryl benzene sulfonic acids, dicetyl thianthrene sulfonic acids, dilauryl beta- naphthol sulfonic acids, dicapryl nitronaphthalene sulfonic acids, saturated paraffin wax sulfonic acids, unsaturated paraffin wax sulfonic acids, hydroxy-substituted paraffin wax sulfonic acids, tetraisobutylene sulfonic acids, tetra- amylene sulfonic acids, chloro-substituted paraffin wax
- Alkyl-substituted benzene sulfonic acids wherein the alkyl group contains at least 8 carbon atoms including dodecyl benzene "bottoms" sulfonic acids, are particularly useful.
- the latter are acids derived from benzene which has been alkylated with propylene tetramers or isobutene trimers to introduce 1, 2, 3, or more branched-chain C 12 substituents on the benzene ring.
- Dodecyl benzene bottoms principally mixtures of mono- and di-dodecyl benzenes, are available as by-products from the manufacture of household detergents. Similar products obtained from alkylation bottoms formed during manufacture of linear alkyl sulfon- ates (LAS) are also useful in making the sulfonates used in this invention.
- LAS linear alkyl sulfon- ates
- a preferred group of sulfonic acids are mono-, di-, and tri-alkylated benzene and naphthalene (including hydrogenated forms thereof) sulfonic acids.
- Illustrative of the synthetically produced alkylated benzene and naph- thalene sulfonic acids are those containing alkyl substitu ⁇ ents having from about 8 to about 30 carbon atoms, prefera ⁇ bly about 12 to about 30 carbon atoms, and advantageously about 24 carbon atoms.
- Such acids include di-isododecyl- benzene sulfonic acid, wax-substituted phenol sulfonic acid, wax-substituted benzene sulfonic acids, polybutenyl- substituted sulfonic acid, polypropylenyl-substituted sulfonic acids derived from polypropylene having a number average molecular weights (Mn) of about 300-1000, more preferably 500-700, cetyl-chlorobenzene sulfonic acid, di-cetylnaphthalene sulfonic acid, di-lauryldiphenylether sulfonic acid, diisononylbenzene sulfonic acid, di-isoocta- decylbenzene sulfonic acid, stearylnaphthalene sulfonic acid, and the like.
- Mn number average molecular weights
- sulfonic acids from detergent manufacture by-products by reaction with, e.g., S0 3 , is well known to those skilled in the art. See, for example, the article “Sulfonates” in Kirk-Othmer “Encyclopedia of Chemical Technology", Second Edition, Vol. 19, pp. 291 et seq. published by John Wiley & Sons, N.Y. (1969) .
- the phosphorus-containing acids useful in making the salts of the present invention include any phosphorus acids such as phosphoric acid or esters; and thiophosphorus acids or esters, including mono and dithiophosphorus acids or esters.
- the phosphorus- containing acid is the reaction product of the above polyalkene and phosphorus sulfide.
- Useful phosphorus sulfide-containing sources include phosphorus pentasulfide, phosphorus sesquisulfide, phosphorus heptasulfide and the like.
- the reaction of the polyalkene and the phosphorus sulfide generally may occur by simply mixing the two at a temperature above 80°C, preferably between 100°C and 300°C.
- the products have a phosphorus content from about 0.05% to about 10%, preferably from about 0.1% to about 5%.
- the relative proportions of the phosphorizing agent to the olefin polymer is generally from 0.1 part to 50 parts of the phosphorizing agent per 100 parts of the olefin polymer.
- the phenols useful in making the overbased salts of the invention can be represented by the formula (R 1 ).-Ar-
- a and b are independently numbers in the range of 1 to about 4, more preferably 1 to about 2.
- Ri and a are preferably such that there is an average of at least about 8 aliphatic carbon atoms provided by the R-. groups for each phenol compound.
- phenol is used herein, it is to be understood that this term is not intended to limit the aromatic group of the phenol to benzene. Accordingly, it is to be understood that the aromatic group as represented by “Ar”, as well as elsewhere in other formulae in this specification and in the appended claims, can be mononucle- ar such as a phenyl, a pyridyl, or a thienyl, or polynucle- ar.
- the polynuclear groups can be of the fused type wherein an aromatic nucleus is fused at two points to another nucleus such as found in naphthyl, anthranyl, etc.
- the polynuclear group can also be of the linked type wherein at least two nuclei (either mononuclear or polynu ⁇ clear) are linked through bridging linkages to each other.
- bridging linkages can be chosen from the group consisting of alkylene linkages, ether linkages, keto linkages, sulfide linkages, polysulfide linkages of 2 to about 6 sulfur atoms, etc.
- the number of aromatic nuclei, fused, linked or both, in Ar can play a role in determining the integer values of a and b.
- the sum of a and b is from 2 to 6.
- Ar contains two aromatic nuclei the sum of a and b is from 2 to 10.
- the sum of a and b is from 2 to 15.
- the value for the sum of a and b is limited by the fact that it cannot exceed the total number of displaceable hydrogens on the aromatic nucleus or nuclei of Ar.
- promoters include the alcoholic and phenolic promoters.
- the alcoholic promoters include the alkanols of one to about 12 carbon atoms such as methanol, ethanol, amyl alcohol, octanol, isopropanol, and mixtures of these and the like.
- Phenolic promoters include a variety of hydroxy-substituted benzenes and naphthalenes.
- a particularly useful class of phenols are the alkylated phenols of the type listed in U.S. Patent 2,777,874, e.g., heptylphenols, octylphenols, and nonyl- phenols. Mixtures of various promoters are sometimes used.
- Acidic materials which are reacted with the mixture of acidic organic compound, promoter, metal com ⁇ pound and reactive medium, are also disclosed in the above cited patents, for example, U.S. Patent 2,616,904. Includ- ed within the known group of useful acidic materials are liquid acids such as formic acid, acetic acid, nitric acid, boric acid, sulfuric acid, hydrochloric acid, hydrobromic acid, carbamic acid, substituted carba ic acids, etc.
- Acetic acid is a very useful acidic material although inorganic acidic compounds such as HC1, S0 2 , S0 3 , C0 2 , H 2 S, N 2 0 3f etc., are ordinarily employed as the acidic materials.
- Preferred acidic materials are carbon dioxide and acetic acid, more preferably carbon dioxide.
- the alkali metals present in the overbased alkali metal salts include principally lithium, sodium and potas ⁇ sium, with sodium and potassium being preferred and with sodium most preferred.
- the overbased metal salts are prepared using a basic alkali metal compound.
- basic alkali metal compounds are hydroxides, oxides, alkoxides (typically those in which the alkoxy group contains up to 10 and preferably up to 7 carbon atoms) , hydrides and amides of alkali metals.
- useful basic alkali metal compounds include sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium propoxide, lithium methoxide, potassium ethoxide, sodium butoxide, lithium hydride, sodium hydride, potassium hydride, lithium amide, sodium amide and potassium amide.
- sodium hydroxide and the sodium lower alkoxides i.e., those containing up to 7 carbon atoms.
- the temperature, at which the acidic material is contacted with the remainder of the reaction mass depends to a large measure upon the promoting agent used. With a phenolic promoter, the temperature usually ranges from about 80°C to about 300°C, and preferably from about 100°C to about 200°C. When an alcohol or mercaptan is used as the promoting agent, the temperature usually will not exceed the reflux temperature of the reaction mixture.
- the alkali metal overbased salts are borated alkali metal overbased salts.
- Borated overbased metal salts are prepared by reacting a boron compound with a detergent or by using boric acid to over- base the organic acid.
- Boron compounds include boron oxide, boron oxide hydrate, boron trioxide, boron trifluor- ide, boron tribromide, boron trichloride, boron acid such as boronic acid, boric acid, tetraboric acid and metaboric acid, boron hydrides, boron amides and various esters of boron acids.
- the boron esters are preferably lower alkyl (1-7 carbon atoms) esters of boric acid.
- the boron compounds are boric acid.
- the overbased metal salt is reacted with a boron compound at about 50°C to about 250°C, preferably 100°C to about 200°C.
- the reaction may be accomplished in the presence of a solvent such as mineral oil, naphtha, kerosene, toluene or xylene.
- the overbased metal salt is reacted with a boron compound in amounts to provide at least about 0.5 to about 5 percent by weight boron to the composition, preferably about 1 to about 4 percent by weight, more preferably about 3.
- Borated overbased compositions, lubricating compositions containing the same and methods of preparing borated overbased compositions are found in U.S. Patent 4,744,922 issued to Fischer et al; U.S. Patent 4,792,410 issued to Schwind et al and PCT Publication W088/03144.
- the disclosures relating to the above are hereby incorpo ⁇ rated by reference.
- overbased alkali metal salts of this inven ⁇ tion and their preparations are illustrated in the follow- ing examples.
- Example A-l A solution of 780 parts (1 equivalent) of an alkylated benzenesulfonic acid (57% by weight 100 neutral mineral oil and unreacted alkylated benzene) and 119 parts (0.2 equivalent) of the polybutenyl succinic anhydride in 442 parts of mineral oil is mixed with -800 parts (20 equivalents) of sodium hydroxide and 704 parts (22 equiva ⁇ lents) of methanol. The mixture is blown with carbon dioxide at 7 cfh. (cubic feet per hour) for 11 minutes as the temperature slowly increases to 97°C. The rate of carbon dioxide flow is reduced to 6 cfh. and the tempera ⁇ ture decreases slowly to 88°C over about -40 minutes.
- the rate of carbon dioxide flow is reduced to -5 cfh. for about 35 minutes and the temperature slowly decreases to 73°C.
- the volatile materials are stripped by -blowing nitrogen through the carbonated mixture at 2 cfh. for 105 minutes as the temperature is slowly increased to 160°C. After stripping is completed, the mixture is held at 160°C for an additional 45 minutes and then filtered to yield an oil solution of the desired basic sodium sulfonate having a metal ratio of about 19.75.
- Example A-2 Following the procedure of Example A-l, 836 parts (1 equivalent) of a 48% 100 neutral mineral oil solution of a sodium petroleum sulfonate and 63 parts (0.11 equivalent) of the polybutenyl succinic anhydride is heated to 60°C and treated with 280 parts (7 equivalents) of sodium hydroxide and 320 parts (10 equivalents) of methanol. The reaction mixture is blown with carbon dioxide at 4 cfh. for about 45 minutes. During this time, the temperature increases to 85°C and then slowly decreases to 74°C. The volatile material is stripped by blowing with nitrogen at 2 cfh. while the temperature is gradually increased to 160°C. After stripping is completed, the mixture is heated an additional 30 minutes at 160 ⁇ C and then is filtered to yield the sodium salt in solution. The product has a metal ratio of 8.0.
- Example A-3 A sodium carbonate overbased (20:1 equivalent) sodium sulfonate (1000 parts, 7.84 equivalents) is mixed with 130 parts of 100 neutral mineral oil in a reaction vessel. The mixture of the sodium carbonate overbased sodium sulfonate and the mineral oil is heated to 75°C. Boric acid (486 parts, 7.84 moles) is then added slowly without substantially changing the temperature of the mixture.
- the reaction mixture is then slowly heated to 100°C over a period of about 1 hour while removing sub ⁇ stantially all of the distillate. About one-half of the carbon dioxide is removed, without substantial foaming.
- the product is then further heated to 150°C for about 3 hours while removing all of the distillate. It is observed that at the latter temperature, substantially all of the water is removed and very little additional carbon dioxide is evolved from the product.
- the product is then held for another hour at 150 ⁇ C until the water content of the product is less than about 0.3%.
- the product is recovered by allowing it to cool to 100°C-120°C followed by filtration.
- the filtrate has 6.12% boron, 14.4% Na, and 35% 100 neutral mineral oil.
- Example A-4 A reaction vessel is charged with 1122 parts (2 equivalents) of a polybutenyl substituted succinic anhy ⁇ dride, 105 parts (0.4 equivalents) of tetrapropenyl phenol, 1122 parts of xylene and 1000 grams of 100 neutral mineral oil. The reaction mixture is stirred and heated to 80°C under nitrogen, where 580 parts of a 50% aqueous solution of sodium hydroxide is added to the vessel over 10 minutes. The reaction mixture is heated from 80°C to 120°C over 1.3 hours. Water is removed by azeotropic reflux and the temperature rises to 150°C over 6 hours while 300 parts of water is collected.
- reaction mixture is cooled to 80 Q C where 540 parts of a 50% aqueous solution of sodium hydrox ⁇ ide is added to the vessel.
- the reaction mixture is heated to 140°C over 1.7 hours and water is removed at reflux conditions.
- the reaction mixture is carbonated at 1 scfh (standard cubic feet per hour) while removing water for 5 hours.
- Steps (l)-(3) above are repeated using 560 parts of an aqueous sodium hydroxide solution.
- Steps (l)-(3) are repeated using 640 parts of an aqueous sodium hydroxide solution.
- Steps (l)-(3) are then repeated with another 640 parts of a 50% aqueous sodium hydroxide solu ⁇ tion.
- the reaction mixture is cooled and 1000 parts of 100 neutral mineral oil are added to the reaction mixture.
- the reaction mixture is vacuum stripped to 115 ⁇ C, 30 millime- ters of mercury.
- the reaction is filtered through diatoma- ceous earth.
- the filtrate has a total base number of 361 (theoretical 398), 43.4% sulfated ash (theoretical 50.3) and a specific gravity of 1.11.
- Example A-5
- a reaction vessel is charged with 1561 parts (1.11 equivalents) of an oil solution of a bright stock sulfonic acid derived from Mobil 150 bright stock (molecu ⁇ lar weight 600 and 72% bright stock diluent) , 107 parts (0.27 equivalent) of sulfur coupled tetrapropylene substi ⁇ tuted phenol (27% 100 neutral mineral oil), 178 parts (0.31 equivalent) of a polybutenyl substituted succinic anhydride derived from a polybutene (Mn equals 960) , 118 parts 100 neutral mineral oil and 1000 parts toluene.
- a bright stock sulfonic acid derived from Mobil 150 bright stock (molecu ⁇ lar weight 600 and 72% bright stock diluent)
- 107 parts (0.27 equivalent) of sulfur coupled tetrapropylene substi ⁇ tuted phenol (27% 100 neutral mineral oil
- 178 parts (0.31 equivalent) of a polybutenyl substituted succinic anhydride derived
- the mixture is heated to 100°C whereupon 591 parts (7.4 equivalents) of a 50% aqueous solution of sodium hydroxide is added to the reaction mixture.
- the reaction mixture is blown with carbon dioxide for 1.75 hours at 1 scfh while 275 parts of water are removed.
- the reaction is cooled at 90°C and the 275 parts of water are readded to the reaction mixture.
- the reaction is heated to 100°C and the temperature is maintained for two hours, whereupon 31 parts (0.05 equiva ⁇ lent) of the above polybutenyl succinic anhydride and 36 parts (0.09 equivalent) of the sulfur coupled tetrapropenyl phenol are added in 100 parts of toluene.
- the reaction mixture is blown with carbon dioxide for four hours at 117°C while 350 parts of water are removed.
- the reaction is cooled to 80°C where 434 parts (5.4 equivalents) of the aqueous sodium hydroxide are added to the reaction mixture.
- the mixture is blown with carbon dioxide for 3.5 hours while 550 parts of water are removed.
- the reaction is cooled to 90°C where 600 parts (7.5 equivalents) of the aqueous sodium hydroxide are added to the reaction mixture.
- the mixture is blown with carbon dioxide for eight hours at a temperature of 105°-112°C while 870 parts of water are removed.
- the reaction mixture is cooled to 40°C where 601 parts (7.5 equivalents) of the aqueous sodium hydroxide are added to the reaction mixture.
- the reaction mixture is heated to 110°-112°C and blown with carbon dioxide for seven hours while 1150 parts of water are removed.
- the reaction is cooled to 60°C where 164 parts (2.1 equiva ⁇ lents) of. aqueous sodium hydroxide are added to the reac ⁇ tion mixture.
- the reaction mixture is heated to 110°C- 120°C and blown with carbon dioxide for 7 hours, while a total of 1410 parts of water are removed.
- the lubricating compositions contain at least one dispersant.
- the dispersants are selected from the group consisting of: (a) nitrogen-containing carboxylic dispers ⁇ ants, (b) amine dispersants, (c) ester dispersants, (d) Mannich dispersants, (e) dispersant viscosity improvers and (f) mixtures thereof.
- the dispersants may be post-treated with such reagents as urea, thiourea, carbon disulfide, aldehydes, ketones, carboxylic acids, hydrocarbon-substituted succinic anhydrides, nitriles, epoxides, boron compounds, phosphorus compounds, etc.
- the nitrogen-containing carboxylic dispersants include reaction products of hydrocarbyl-substituted carboxylic acylating agents such as substituted carboxylic acids or derivatives thereof with an amine.
- the hydrocarbyl-substituted carboxylic acylating agent may be derived from a monocarboxylic acid or a polycarboxylic acid. Polycarboxylic acids generally are preferred.
- the acylating agents may be a carboxylic acid or derivatives of the carboxylic acid such as the halides, esters, anhydrides, etc., preferably acid, esters or anhydrides, more preferably anhydrides.
- the carboxylic acylating agent is a succinic acylating agent.
- the hydrocarbyl-substituted carboxylic acylating agent includes agents which have a hydrocarbyl group derived from the above-described polyalkene.
- the hydrocarbyl groups are derived from polyalkenes having an Mn value of at least about 1300 up to about 5000, and the Mw/Mn value is from about 1.5 to about 4, preferably from about 1.8 to about 3.6, more preferably about 2.5 to about 3.2.
- the prepara ⁇ tion and use of substituted succinic acylating agents wherein the substituent is derived from such polyalkenes are described in U.S. Patent 4,234,435, the disclosure of which is hereby incorporated by reference.
- the hydrocarbyl-substituted carboxylic acylating agents are prepared by a reaction of one or more polyal ⁇ kenes with one or more unsaturated carboxylic reagent.
- the unsaturated carboxylic reagent generally contains an alpha-beta olefinic unsaturation.
- the carboxylic reagents may be carboxylic acids per se and functional derivatives thereof, such as anhydrides, esters, amides, imides, salts, acyl halides, and nitriles. These carboxylic acid reagents may be either monobasic or polybasic in nature. When they are polybasic they are preferably dicarboxylic acids, although tri- and tetracarboxylie acids can be used. Specific examples of useful monobasic unsaturated carboxyl ⁇ ic acids are acrylic acid, methacrylic acid, cinnamic acid, crotonic acid, 2-phenylpropenoic acid, etc.
- Exemplary polybasic acids include maleic acid, fumaric acid, mesa- conic acid, itaconic acid and citraconic acid.
- the unsaturated carboxylic acid or derivative is maleic anhydride or maleic or fumaric acid or ester, preferably, maleic acid or anhydride, more preferably maleic anhydride.
- the polyalkene may be reacted with the carboxylic reagent such that there is at least one mole of reagent for each mole of polyalkene that reacts.
- an excess of reagent is used. This excess is generally between about 5% to about 25%.
- the acylating agents are prepared by reacting the above described polyalkene with an excess of maleic anhydride to provide substituted succinic acylating. agents wherein the number of succinic groups for each equivalent weight of substituent group is at least
- the polyalkene preferably has an Mn from about 1300 to about
- Mn is preferably between about 1300 and 5000.
- a more preferred range for Mn is from about 1500 to about
- the number of equivalent weights of substituent groups is deemed to be the number obtained by dividing the Mn value of the poly ⁇ alkene from which the substituent is derived into the total weight of the substituent groups present in the substituted succinic acylating agents.
- succinic acylating agent or acylating agent mixture must also be characterized by the presence within its structure of at least 26 succinic groups to meet one of the require ⁇ ments of the succinic acylating agents used in this inven- tion.
- the ratio of succinic groups to the equivalent weight of substituent group present in the acylating agent can be determined from the saponification number of the reacted mixture corrected to account for unreacted poly- alkene present in the reaction mixture at the end of the reaction (generally referred to as filtrate or residue in the following examples) .
- Saponification number is deter ⁇ mined using the ASTM D-94 procedure. The formula for calculating the ratio from the saponification number is as follows:
- the corrected saponification number is obtained by dividing the saponification number by the percent of the polyalkene that has reacted. For example, if 10% of the polyalkene did not react and the saponification number of the filtrate or residue is 95, the corrected saponification number is 95 divided by 0.90 or 105.5.
- the above-described carboxylic acylating agents are reacted with amines to form the nitrogen-containing carboxylic dispersants of the present invention.
- the amine may be a monoamine or polyamine, typically a polyamine, preferably ethylene amines, amine bottoms or amine conden ⁇ sates.
- the amines can be aliphatic, cycloaliphatic, aromatic, or heterocyclic, including aliphatic-substituted cycloaliphatic, aliphatic-substituted aromatic, aliphatic- substituted heterocyclic, cycloaliphatic-substituted aliphatic, cycloaliphatic-substitutedheterocyclic, aromat ⁇ ic-substituted aliphatic, aromatic-substituted cycloali ⁇ phatic, aromatic-substituted heterocyclic, heterocyclic- substituted aliphatic, heterocyclic-substituted alicyclic. and heterocyclic-substituted aromatic amines and may be saturated or unsaturated.
- the monoamines generally contain from 1 to about 24 carbon atoms, preferably 1 to about 12, and more prefer- ably 1 to about 6.
- Examples of monoamines useful in the present invention include methylamine, ethylamine, propyl- amine, butylamine, cyclopentylamine, cyclohexylamine, octylamine, dodecylamine, allylamine, cocoamine, stearyl- amine, and laurylamine.
- secondary amines examples include dimethylamine, diethylamine, dipropylamine, dibu- tylamine, dicyclopentylamine, dicyclohexylamine, ethyl- butylamine, ethylhexylamine, etc.
- Tertiary amines include trimethylamine, tributylamine, methyldiethylamine, ethyl- dibutyla ine, etc.
- the amine may be a hy- droxyamine.
- the hydroxyamines are primary, secondary or tertiary alkanol amines or mixtures thereof. Such amines can be represented by the formulae:
- each R' is independently a hydrocarbyl group of one to about eight carbon atoms or hydroxyhydrocarbyl group of two to about eight carbon atoms, preferably one to about four, and R' is a divalent hydrocarbyl group of about two to about 18 carbon atoms, preferably two to about four.
- the group -R'-OH in such formulae represents the hydroxy- hydrocarbyl group.
- R' can be an acyclic, alicyclic or aromatic group.
- R' is an acyclic straight or branched alkylene group such as an ethylene, 1,2-propylene, 1,2-butylene, 1,2-octadecylene, etc. group.
- R'j groups are present in the same molecule they can be joined by a direct carbon-to-carbon bond or through a heteroatom (e.g., oxygen, nitrogen or sulfur) to form a 5-, 6-, 7- or 8-membered ring structure.
- heterocyclic amines include N-(hydroxyl lower alkyl)-morpholines, -thiomorpholines, -piperidines, -oxazolidines, -thiazoli- dines and the like.
- each R'i is inde- pendently a methyl, ethyl, propyl, butyl, pentyl or hexyl group.
- alkanolamines examples include mono-, di-, and triethanol amine, diethylethanolamine, ethyleth- anolamine, butyldiethanolamine, etc.
- the hydroxyamines can also be an ether N-(hy- droxyhydro ⁇ arbyl)amine.
- Such N-(hydroxyhydrocarbyl) amines can be conveniently prepared by reaction of epoxides with afore- described amines and can be represented by the formulae:
- Rj and R' are as described above.
- R'j may also be a hydroxypoly- (hydrocarbyloxy) group.
- Suitable amines also include polyoxyalkylene polyamines, e.g., polyoxyalkylene diamines and polyoxyal- kylene triamines, having average molecular weights ranging from about 200 to 4000 and preferably from about 400 to 2000.
- polyoxyalkylene polyamines e.g., polyoxyalkylene diamines and polyoxyal- kylene triamines, having average molecular weights ranging from about 200 to 4000 and preferably from about 400 to 2000.
- Illustrative examples of these polyoxyalkylene polyamines may be characterized by the formulae: NH 2 - Alkylene (0-Alkylene) m NH 2 , wherein m has a value of about 3 to 70 and preferably about 10 to 35; and R(Alkylene(O- Alkylene) n NH 2 ) 3 ⁇ , wherein n is such that the total value is from about 1 to 40 with the proviso that the sum of all of the n's is from about 3 to about 70 and generally from about 6 to about 35 and R is a polyvalent saturated hydro- carbon radical of up to 10 carbon atoms having a valence of 3 to 6.
- the alkylene groups may be straight or branched chains and contain from 1 to 7 carbon atoms and usually from 1 to 4 carbon atoms.
- the various alkylene groups present may be the same or different.
- the preferred polyoxyalkylene polyamines include the polyoxyethylene and polyoxypropylene diamines and the polyoxypropylene triamines having average molecular weights ranging from about 200 to 2000.
- the polyoxyalkylene polyamines are commercially available an may be obtained, for example, from the Jefferson Chemical Company, Inc. under the trade name "Jeffamines D-230, D-400, D-1000, D- 2000, T-403, etc.”.
- the nitrogen-containing carboxylic dispersant may be derived from a polyamine.
- the polyamine may be aliphat ⁇ ic, cycloaliphatic, heterocyclic or aromatic.
- Examples of the polyamines include alkylene polyamines, hydroxy con ⁇ taining polyamines, arylpolyamines, and heterocyclic polyamines.
- Alkylene polyamines are represented by the formula
- n has an average value from 1 to about 10, prefera ⁇ bly about 2 to about 7, more preferably about 2 to about 5, and the "Alkylene" group has from 1 to about 10 carbon atoms, preferably about 2 to about 6, more preferably about 2 to about 4.
- 2 is independently preferably hydrogen; or an aliphatic or hydroxy-substituted aliphatic group of up to about 30 carbon atoms.
- R 2 is defined the same cLS JEV ⁇ •
- alkylene polyamines include methylene polyamines, ethylene polyamines, butylene polyamines, propylene polyamines, pentylene polyamines, etc.
- the higher homologs and related heterocyclic amines such as piperazines and N-amino alkyl-substituted piperazines are also included.
- Specific examples of such polyamines are ethylene diamine, triethylene tetramine, tris-(2amino- ethyl)amine, propylene diamine, trimethylene diamine, tripropylene tetramine, tetraethylene pentamine, hexa- ethylene heptamine, pentaethylenehexamine, etc.
- Ethylene polyamines such as those mentioned above, are useful. Such polyamines are described in detail under the heading Ethylene Amines in Kirk Othmer's "Ency ⁇ clopedia of Chemical Technology", 2d Edition, Vol. 7, pages 22-37, Interscience Publishers, New York (1965) . Such polyamines are most conveniently prepared by the reaction of ethylene dichloride with ammonia or by reaction of an ethylene imine with a ring opening reagent such as water, ammonia, etc. These reactions result in the production of a complex mixture of polyalkylene polyamines including cyclic condensation products such as the aforedescribed piperazines. Ethylene polyamine mixtures are useful.
- alkylene polyamine bottoms can be characterized as having less than two, usually less than 1% (by weight) material boiling below about 200°C.
- a typical sample of such ethylene polyamine bottoms obtained from the Dow Chemical Company of Freeport, Texas designated “E-100” has a specific gravity at 15.6°C of 1.0168, a percent nitrogen by weight of 33.15 and a viscosity at 40°C of 121 centistokes.
- alkylene polyamine bottoms can be reacted solely with the acylating agent or they can be used with other amines, polyamines, or mixtures thereof.
- Another useful polyamine is a condensation reac ⁇ tion between at least one hydroxy compound with at least one polyamine reactant containing at least one primary or secondary amino group.
- the hydroxy compounds are prefera- bly polyhydric alcohols and amines.
- the polyhydric alco ⁇ hols are described below. (See carboxylic ester disper ⁇ sants.)
- Preferably the hydroxy compounds are polyhydric amines.
- Polyhydric amines include any of the above-de ⁇ scribed monoamines reacted with an alkylene oxide (e.g., ethylene oxide, propylene oxide, butylene oxide, etc.) having two to about 20 carbon atoms, preferably two to about four.
- alkylene oxide e.g., ethylene oxide, propylene oxide, butylene oxide, etc.
- polyhydric amines examples include tri-(hy- droxypropyl)amine, tris-(hydroxymethyl)amino methane, 2- amino-2-methyl-l,3-propanediol, N,N,N',N'-tetrakis(2- hydroxypropy1)ethylenediamine, and N, ,N',N'-tetrakis(2- hydroxyethyl)ethylenediamine, preferably tris(hydroxy- methyl)aminomethane (THAM) .
- THAM tris(hydroxy- methyl)aminomethane
- Polyamine reactants which react with the poly ⁇ hydric alcohol or amine to form the condensation products or condensed amines, are described above.
- Preferred poly ⁇ amine reactants include triethylenetetramine (TETA) , tetraethylenepentamine (TEPA) , pentaethylenehexamine (PEHA) , and mixtures of polyamines such as the above- described "amine bottoms".
- TETA triethylenetetramine
- TEPA tetraethylenepentamine
- PEHA pentaethylenehexamine
- the condensation reaction of the polyamine reactant with the hydroxy compound is conducted at an elevated temperature, usually about 60°C to about 265°C, (preferably about 220°C to about 250°C) in the presence of an acid catalyst.
- THAM 40% aqueous tris(hydroxy- methyl)aminomethane
- the polyamines are hy- droxy-containing polyamines.
- Hydroxy-containing polyamine analogs of hydroxy monoamines particularly alkoxylated alkylenepolyamines (e.g., N,N(diethanol)ethylene diamine) can also be used.
- Such polyamines can be made by reacting the above-described alkylene amines with one or more of the above-described alkylene oxides.
- Similar alkylene oxide- alkanol amine reaction products can also be used such as the products made by reacting the aforedescribed primary, secondary or tertiary alkanol amines with ethylene, propyl ⁇ ene or higher epoxides in a 1.1 to 1.2 molar ratio.
- alkoxylated alkylenepoly ⁇ amines include N-(2-hydroxyethyl) ethyi-enediamine, N,N- bis(2-hydroxyethyl)-ethylene-diamine, l-(2-hydroxyethyl)- piperazine, mono(hydroxypropyl)-substituted tetraethylene- pentamine, N-(3-hydroxybutyl)-tetramethyi-ene diamine, etc.
- Higher homologs obtained by condensation of the above- illustrated hydroxy-containing polyamines through amino groups or through hydroxy groups are likewise useful.
- the amine is a heterocy-rod polyamine.
- the heterocyclic polyamines include aziridines, azetidines, azolidines, tetra- and dihydro- pyridines, pyrroles, indoles, piperidines, imidazoles, di- and tetrahydroimidazoles, piperazines, isoindoles, purines, morpholines, thiomorpholines, N-aminoalkylmorpholines, N-aminoalkylthiomorpholines, N-aminoalkylpiperazines, N,N'-diaminoalkylpiperazines, azepines, azocines, azonines, anovanes and tetra-, di- and perhydro derivatives of each of the above and mixtures of two or more of these heterocy ⁇ tun amines.
- Preferred heterocyclic amines are the satu- rated 5- and 6-membered heterocyclic amines containing only nitrogen, oxygen and/or sulfur in the hetero ring, espe ⁇ cially the piperidines, piperazines, thiomorpholines, morpholines, pyrrolidines, and the like.
- Piperidine, aminoalkylsubstituted piperidines, piperazine, aminoalkyl- substituted piperazines, morpholine, aminoalkylsubstituted morpholines, pyrrolidine, and aminoalkyl-substituted pyrrolidines are especially preferred.
- the aminoalkyl substituents are substituted on a nitrogen atom forming part of the hetero ring.
- heterocyclic amines include N-aminopropylmorpholine, N-aminoethylpiperazine, and N,N'-diaminoethylpiperazine.
- Hydroxy heterocyclic polyamines are also useful. Examples include N-(2-hydroxyethyl)cyclohexylamine, 3-hydroxycyclo- pentylamine, parahydroxyaniline, N-hydroxyethylpiperazine, and the like. Hydrazine and substituted-hydrazine can also be used to form nitrogen-containing carboxylic dispersants. At least one of the nitrogens in the hydrazine must contain a hydrogen directly bonded thereto.
- hydrazine nitro ⁇ gen there are at least two hydrogens bonded directly to hydrazine nitro ⁇ gen and, more preferably, both hydrogens are on the same nitrogen.
- the substituents which may be present on the hydrazine include alkyl, alkenyl, aryl, aralkyl, alkaryl, and the like.
- the substituents are alkyl, espe- cially lower alkyl, phenyl, and substituted phenyl such as lower alkoxy substituted phenyl or lower alkyl substituted phenyl.
- substituted hydrazines are methylhydrazine, N,N-dimethyl-hydrazine, N,N'-dimethylhy- drazine, phenylhydrazine, N-phenyl-N'-ethylhydrazine, N- (para-tolyl)-N'-(n-butyl)-hydrazine, N-(para-nitrophenyl)- hydrazine, N-(para-nitrophenyl)-N-methyl-hydrazine, N,N'- di(para-chlorophenol)-hydrazine, N-phenyl-N'-cyclohexylhy- drazine, and the like.
- Nitrogen-containing carboxylic dispersants and methods for preparing the same are described in U.S. Patents 4,234,435; 4,952,328; 4,938,881; 4,957,649; and 4,904,401.
- the disclosures of nitrogen-containing car ⁇ boxylic dispersants and other dispersants contained in those patents is hereby incorporated by reference.
- the following examples illustrate the nitrogen- containing carboxylic dispersants and methods for preparing them.
- Example B-l A mixture is prepared by the addition of 8.16 parts (0.20 equivalent) of a commercial mixture of ethylene polyamines having from about 3 to about 10 nitrogen atoms per molecule to 113 parts of mineral oil and 161 parts (0.24 equivalent) of the substituted succinic acylating agent prepared in Example I at 138°C. The reaction mixture is heated to 150°C in 2 hours and stripped by blowing with nitrogen. The reaction mixture is filtered to yield the filtrate as an oil solution of the desired product.
- a mixture is prepared by the addition of 18.2 parts (0.433 equivalent) of a commercial mixture of ethyl ⁇ ene polyamines having from about 3 to 10 nitrogen atoms per molecule to 392 parts of mineral oil and 348 parts (0.52 equivalent) of the substituted succinic acylating agent prepared in Example II at 140°C.
- the reaction mixture is heated to 150°C in 1.8 hours and stripped by blowing with nitrogen.
- the reaction mixture is filtered to yield the filtrate as an oil solution (55% oil) of the desired product.
- Examples B-3 through B-8 are prepared by fol ⁇ lowing the general procedure set forth in Example B-l.
- Example B-9 A commercial mixture of ethylene polyamines corresponding in empirical formula to penta ⁇ ethylene hexamine.
- Example B-9 A mixture of 3660 parts (6 equivalents) of a sub ⁇ stituted succinic acylating agent prepared as in Example I in 4664 parts of diluent oil is prepared and heated at about 110 ⁇ C whereupon nitrogen is blown through the mix ⁇ ture. To this mixture there are then added 210 parts (5.25 equivalents) of an alkylene polyamine mixture, comprising 80% of ethylene polyamine bottoms from Union Carbide and 20% of a commercial mixture of ethylene polyamines corre ⁇ sponding in empirical formula to diethylene triamine, over a period of one hour and the mixture is maintained at 110°C for an additional 0.5 hour.
- the polyamine mixture is characterized as having an equivalent weight of about 43.3.After heating for 6 hours at 155°C while removing water, a filtrate is added and the reaction mixture is filtered at about 150°C. The filtrate is the oil
- the dispersant may also be an amine dispersant.
- Amine dispersants are hydrocarbyl-substituted amines. These hydrocarbyl-substituted amines are well known to those skilled in the art. These amines are disclosed in U.S. patents 3,275,554; 3,438,757; 3,454,555; 3,565,804; 3,755,433; and 3,822,289. These patents are hereby incor- porated by reference for their disclosure of hydrocarbyl amines and methods of making the same.
- amine dispersants are prepared by reacting olefins and olefin polymers (polyalkenes) with amines (mono- or polyamines) .
- polyalkene may be any of the polyalkenes described above.
- amines may be any of the amines described above.
- amine dispersants include poly(propylene)amine; N,N-dimethyl-N-poly(ethyl- ene/propylene)amine, (50:50 mole ratio of monomers); poly ⁇ butene amine; N,N-di(hydroxyethyl)-N-polybutene amine; N- (2-hydroxypropyl)-N-polybuteneamine; N-polybutene-aniline; N-polybutenemorpholine; N-poly(butene)ethylenediamine; N- poly(propylene)trimethylenediamine; N-poly(butene)diethyl- enetriamine;N',N'-poly(butene)tetraethylenepentamine;N,N- dimethyl-N'-poly(propylene)-l,3-propylenediamine and the like.
- the dispersant may also be an ester.dispersant.
- the ester dispersant is prepared by reacting at least one of the above hydrocarbyl-substituted carboxylic acylating agents with at least one organic hydroxy compound and optionally an amine.
- the ester dispersant is prepared by reacting the acylating agent with at least one of the above-de ⁇ scribed hydroxy amine.
- the organic hydroxy compound includes compounds of the general formula R"(OH) m wherein R" is a monovalent or polyvalent organic group joined to the -OH groups through a carbon bond, and m is an integer of from 1 to about 10 wherein the hydrocarbyl group contains at least about 8 aliphatic carbon atoms.
- the hydroxy compounds may be aliphatic compounds such as monohydric and polyhydric alcohols, or aromatic compounds such as phenols and naph- thols.
- aromatic hydroxy compounds from which the esters may be derived are illustrated by the following specific examples: phenol, beta-naphthol, alpha-naphthol, cresol, resorcinol, catechol, p,p'-dihydroxybiphenyl, 2-chlorophenol, 2,4-dibutylphenol, etc.
- the alcohols from which the esters may be derived preferably contain up to about 40 aliphatic carbon atoms, preferably from 2 to about 30, more preferably 2 to about 10. They may be monohydric alcohols such as methanol, ethanol, isooctanol, dodecanol, cyclohexanol, etc.
- the hydroxy compounds are polyhydric alcohols, such as alkylene polyols.
- the polyhydric alcohols contain from 2 to about 40 carbon atoms, more preferably 2 to about 20; and preferably from 2 to about 10 hydroxyl groups, more preferably 2 to about 6.
- Polyhydri alcohols include ethylene glycols, including di-, tri- an tetraethylene glycols; propylene glycols, including di-, tri- and tetrapropylene glycols; glycerol; butane diol; hexane diol; sorbitol; arabitol; annitol; sucrose; fruc tose; glucose; cyclohexane diol; erythritol; and penta- erythrit.ols, including di- and tripentaerythritol; prefera ⁇ bly, diethylene glycol, triethylene glycol, glycerol, sorbitol, pentaerythritol and dipentaerythritol.
- the polyhydric alcohols may be esterified with monocarboxylic acids having from 2 to about 30 carbon atoms, preferably about 8 to about 18, provided that at least one hydroxyl group remains unesterified.
- monocarboxylic acids include acetic, propionic, butyric and fatty carboxylic acids.
- the fatty monocarboxylic acids have from about 8 to about 30 carbon atoms and include octanoic, oleic, stearic, linoleic, dodecanoic and tall oil acids.
- esterified polyhydric alcohols include sorbitol oleate, including mono- and dioleate, sorbitol stearate, including mono- and distear- ate, glycerol oleate, including glycerol mono-, di- and trioleate and erythritol octanoate.
- the carboxylic ester dispersants may be prepared by any of several known methods.
- the esterification is usually carried out at a temperature above about 100°C, preferably between 150°C and 300°C.
- the water formed as a by-product is removed by distillation as the esterification proceeds.
- the preparation of useful carboxylic ester dispersant is described in U.S. Patents 3,522,179 and 4,234,435.
- the carboxylic ester dispersants may be further reacted with at least one of the above described amines and preferably at least one of the above described polyamines.
- the amine is added in an amount sufficient to neutralize any nonesterifed carboxyl groups.
- the nitrogen-containing carboxylic ester dispersants are prepared by reacting about 1.0 to 2.0 equivalents, preferably about 1.0 to 1.8 equivalents of hydroxy com ⁇ pounds, and up to about 0.3 equivalent, preferably about 0.02 to about 0.25 equivalent of polyamine per equivalent of acylating agent.
- the carboxylic acid acylating agent may be reacted simultaneously with both the alcohol and the amine.
- These nitrogen-containing carboxylic ester dispersant compositions are known in the art, and the preparation of a number of these derivatives is described in, for example, U.S. Patents 3,957,854 and 4,234,435 which have been incorporated by reference previ- ously.
- Example B-10 A substantially hydrocarbon-substituted succinic anhydride is prepared by chlorinating a polybutene having a number average molecular weight of 1000 to a chlorine content of 4.5% and then heating the chlorinated polybutene with 1.2 molar proportions of maleic anhydride at a temper ⁇ ature of 150-220°C. A mixture of 874 grams (1 mole) of the succinic anhydride and 104 grams (1 mole) of neopentyl glycol is maintained at 240-250 ⁇ C/30 mm for 12 hours. The residue is a mixture of the esters resulting from the esterification of one and both hydroxy groups of the glycol.
- Example B-ll A mixture of 3225 parts (5.0 equivalents) of the polybutene-substituted succinic acylating agent prepared in Example II, 289 parts (8.5 equivalents) of pentaerythritol and 5204 parts of mineral oil is heated at 224-235°C for 5.5 hours. The reaction mixture is filtered at 130°C to yield an oil solution of the desired product.
- the carboxylic ester derivatives which are des ⁇ cribed above resulting from the reaction of an acylating agent with a hydroxy-containing compound such as an alcohol or a phenol may be further reacted with any of the above- described amines, and particularly polyamines in the manner described previously for the nitrogen-containing dispers ⁇ ants.
- the carboxylic acid acylating agent may be reacted simultaneously with both the alcohol and the amine.
- carboxylic ester derivative compositions are known in the art, and the preparation of a number of these derivatives is described in, for example, U.S. Patents 3,957,854 and 4,234,435 which are hereby incorporated by reference. The following specific examples illustrate the preparation of the esters wherein both alcohols and amines are reacted with the acylating agent.
- Example B-12 A mixture of 1000 parts of polybutene having a number average molecular weight of about 1000 and 108 parts (1.1 moles) of maleic anhydride is heated to about 190°C and 100 parts (1.43 moles) of chlorine are added beneath the surface over a period of about 4 hours while maintain ⁇ ing the temperature at about 185-190°C. The mixture then is blown with nitrogen at this temperature for several hours, and the residue is the desired polybutenyl-substi- tuted succinic acylating agent.
- a solution of 1000 parts of the above-prepared acylating agent in 857 parts of mineral oil is heated to about 150°C with stirring, and 109 parts (3.2 equivalents) of pentaerythritol are added with stirring.
- the mixture is blown with nitrogen and heated to about 200°C over a period of about 14 hours to form an oil solution of the desired carboxylic ester intermediate.
- To the intermediate there are added 19.25 parts (.46 equivalent) of a commercial mixture of ethylene polyamines having an average of about 3 to about 10 nitrogen atoms per molecule.
- the reaction mixture is stripped by heating at 205°C with nitrogen blowing for 3 hours and filtered.
- the filtrate is an oil solution (45% 100 neutral mineral oil) of the desired amine-modified carboxylic ester which contains 0.35% nitrogen.
- the dispersant may also be a Mannich dispersant.
- Mannich dispersants are generally formed by the reaction of at least one aldehyde, at least one of the above described amine and at least one alkyl substituted hydroxyaromatic compound.
- the reaction may occur from room temperature to 225°C, usually from 50° to about 200°C (75°C-150°C most preferred) , with the amounts of the reagents being such that the molar ratio of hydroxyaromatic compound to formal ⁇ dehyde to amine is in the range from about (1:1:1) to about (1:3:3).
- the first reagent is an alkyl substituted hy ⁇ droxyaromatic compound.
- This term includes phenols (which are preferred) , carbon-, oxygen-, sulfur- and nitrogen- bridged phenols and the like as well as phenols directly linked through covalent bonds (e.g. 4,4'-bis(hydroxy)bi- phenyl) , hydroxy compounds derived from fused-ring hydro ⁇ carbon (e.g., naphthols and the like); and polyhydroxy compounds such as catechol, resorcinol and hydroquinone. Mixtures of one or more hydroxyaromatic compounds can be used as the first reagent.
- the hydroxyaromatic compounds are those sub ⁇ stituted with at least one, and preferably not more than two, aliphatic or alicyclic groups having at least about 6 (usually at least about 30, more preferably at least 50) carbon atoms and up to about 400 carbon atoms, preferably 300, more preferably 200. These groups may be derived from the above described polyalkenes.
- the hydroxy aromatic compound is a phenol substituted with an aliphatic or alicyclic hydrocarbon-based group having an Mn of about 420 to about 10,000.
- the second reagent is a hydrocarbon-based alde ⁇ hyde, preferably a lower aliphatic aldehyde.
- Suitable aldehydes include formaldehyde, benzaldehyde, acetaldehyde, the butyraldehydes, hydroxybutyraldehydes and heptanals, as well as aldehyde precursors which react as aldehydes under the conditions of the reaction such as -paraformaldehyde, paraldehyde, formalin and methal.
- Formaldehyde and its precursors e.g., paraformaldehyde, trdoxane
- Mixtures of aldehydes may be used as the second reagent.
- the third reagent is any amine described above.
- the amine is a polyamine as described above.
- Mannnich dispersants are described in the follow ⁇ ing patents: U.S. Patent 3,980,569; U.S. Patent 3,877,899; and U.S. Patent 4,454,059 (herein incorporated by reference for their disclosure to Mannich dispersants) .
- the dispersant may also be a dispersant-viscosity improver.
- the dispersant-viscosity improvers include polymer backbones which are functionalized by reacting with an amine source.
- a true or normal block copolymer or a random block copolymer, or combinations of both are uti ⁇ lized. They are hydrogenated before use in this invention to remove virtually all of their olefinic double bonds. Techniques for accomplishing this hydrogenation are well known to those of skill in the art. Briefly, hydrogenation is accomplished by contacting the copolymers with hydrogen at superatmospheric pressures in the presence of a metal catalyst such as colloidal nickel, palladium supported on charcoal, etc.
- a metal catalyst such as colloidal nickel, palladium supported on charcoal, etc.
- these block copolymers for reasons of oxidative stability, contain no more than about 5 percent and preferably no more than about 0.5 percent residual olefinic unsaturation on the basis of the total number of carbon-to-carbon covalent linkages within the average molecule. Such unsaturation can be measured by a number of means well known to those of skill in the art, such as infrared, NMR, etc. Most preferably, these copolymers contain no discernible unsaturation, as determined by the aforementioned analytical techniques.
- the block copolymers typically have number average molecular weights (Mn) in the range of about 10,000 to about 500,000 preferably about 30,000 to about 200,000.
- the weight average molecular weight (Mw) for these copoly ⁇ mers is generally in the range of about 50,000 to about 500,000, preferably about 30,000 to about 300,000.
- the amine source may be an unsaturated amine compound or an unsaturated carboxylic reagent which is capable of reacting with an amine.
- the unsaturated carbox ⁇ ylic reagents and amines are described above. Examples of saturated amine compounds include
- N-(3,6-dioxahepty1)maleimide N-(3-dimethylaminopropy1)- maleimide, and N-(2-methoxyethoxyethyl)maleimide.
- Pre ⁇ ferred amines are ammonia and primary amine containing compounds.
- Exemplary of such primary amine-containing compounds include ammonia, N,N-dimethylhydrazine, methyl- amine, ethylamine, butylamine, 2-methoxyethylamine, N,N-di- ethyll,3-propanediamine, N-ethyl-N-methyl-1,3-propanedi- amine, N-methyl-l,3-propanediamine, N-(3-aminopropyl)- morpholine, 3-methoxypropylamine, 3-isobutyoxypropylamine and 4,7-dioxyoctylamine, N-(3-aminopropyl)-N-l-methyl- piperazine, N-(2-aminoethyl)piperazine, (2-aminoethyl)pyr- idines, aminopyridines, 2-aminoethylpyridines, 2-amino- methylfuran, 3-amino-2-oxot
- N-(3-aminopropyl)morpholine and N-ethyl- N-methyl-l,3-propanediamine are preferred with N,N-di- methyl-l,3-propanediamine being highly preferred.
- amine terminated polyethers are available commercially from Texaco Chemical Company under the general trade designation "Jeffamine®". Specific examples of these materials include Jeffamine® M-600; M-1000; M-2005; and M-2070 amines.
- the above dispersants may be post-treated with one or more post-treating reagents selected from the group consisting of boron compounds (discussed above) , carbon disulfide, hydrogen sulfide, sulfur, sulfur chlorides, alkenyl cyanides, carboxylic acid acylating agents, alde ⁇ hydes, ketones, urea, thiourea, guanidine, dicyanodiamide, hydrocarbyl phosphates, hydrocarbyl phosphites, hydrocarbyl thiophosphates, hydrocarbyl thiophosphites, phosphorus sulfides, phosphorus oxides, phosphoric acid, hydrocarbyl thiocyanates, hydrocarbyl isocyanates, hydrocarbyl isocyanates, hydrocarbyl isothio- cyanates, epoxides, episulfides, formaldehyde or formalde ⁇ hyde-producing compounds with phenols, and sulfur with phenols.
- U.S. Patents are expressly incor ⁇ porated herein by reference for their disclosure of post- treating processes and post-treating reagents applicable to the carboxylic derivative compositions of this invention: U.S. Patent Nos. 3,087,936; 3,254,025; 3,256,185; 3,278,550; 3,282,955; 3,284,410; 3,338,832; 3,533,945; 3,639,242; 3,708,522; 3,859,318; 3,865,813; 4,234,435; etc.
- U.K. Patent Nos. 1,085,903 and 1,162,436 also describe such processes.
- the dispersants are post- treated with at least one boron compound.
- the reaction of the dispersant with the boron compounds can be effected simply by mixing the reactants at the desired temperature. Ordinarily it is preferably between about 50°C and about 250°C. In some instances it may be 25°C or even lower. The upper limit of the temperature is the decomposition point of the particular reaction mixture and/or product.
- the amount of boron compound reacted with the dispersant generally is sufficient to provide from about 0.1 to about 10 atomic proportions of boron for each mole of dispersant, i.e., the atomic proportion of nitrogen or hydroxyl group contained in the dispersant.
- the preferred amounts of reactants are such as to provide from about 0.5 to about 2 atomic proportions of boron for each mole of dispersant.
- the amount of a boron compound having one boron atom per molecule to be used with one mole of an amine dispersant having five nitrogen atoms per molecule is within the range from about 0.1 mole to about 50 moles, preferably from about 0.5 mole to about 10 moles.
- compositions of the present invention also contain (C) at least one metal dihydrocarbyl dithio ⁇ phosphate characterized by the formula
- R 3 and R 4 are each independently hydrocarbyl groups containing from 3 to about 13 carbon atoms, preferably from 3 to about 8, M is a metal, and z is an integer equal to the valence of M.
- the hydrocarbyl groups R 3 and R 4 in the dithio ⁇ phosphate may be alkyl, cycloalkyl, aralkyl or alkaryl groups.
- Illustrative alkyl groups include isopropyl, isobutyl, n-butyl, sec-butyl, the various amyl groups, n-hexyl, methylisobutyl carbinyl, heptyl, 2-ethylhexyl, diisobutyl, isooctyl, nonyl, behenyl, decyl, dodecyl, tridecyl, etc.
- Illustrative lower alkylphenyl groups include butylphenyl, amylphenyl, heptylphenyl, etc. Cyclo ⁇ alkyl groups likewise are useful and these include chiefly cyclohexyl and the lower alkyl-cyclohexyl radicals. Many substituted hydrocarbon groups may also be used, e.g., chloropentyl, dichlorophenyl, and dichlorodecyl.
- the phosphorodithioic acids from which the metal salts useful in this invention are prepared are well known. Examples of dihydrocarbyl phosphorodithioic acids and metal salts, and processes for preparing such acids and salts are found in, for example, U.S. Patents 4,263,150; 4,289,635; 4,308,154; and 4,417,990. These patents are hereby incor ⁇ porated by reference for such disclosures.
- the phosphorodithioic acids are prepared by the reaction of phosphorus pentasulfide with an alcohol or phenol or mixtures of alcohols.
- the reaction involves four moles of the alcohol or phenol per mole of phosphorus pentasulfide, and may be carried out within the temperature range from about 50°C to about 200°C.
- the preparation of 0,0-di-n-hexyl phosphorodithioic acid involves the reaction of phosphorus pentasulfide with four moles of n-hexyl alcohol at about 100°C for about two hours. Hydrogen sulfide is liberated and the residue is the defined acid.
- the preparation of the metal salt of this acid may be effected by reaction with metal oxide. Simply mixing and heating these two reactants is sufficient to cause the reaction to take place and the resulting product is sufficiently pure for the purposes of this invention.
- the metal salts of dihydrocarbyl dithiophosphates which are useful in this invention include those salts containing Group I metals.
- Group I and Group II are defined in the Periodic Table of the Elements in the Merck Index, 9th Edition (1976) .
- the Group II metals, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel and copper are among the preferred metals. Zinc and copper are especially useful metals.
- the lubricating composi- tions contain a zinc dihydrocarbyl dithiophosphate and a copper dihydrocarbyl dithiophosphate.
- metal compounds which may be reacted with the acid include lithium oxide, lithium hydroxide, sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, silver oxide, magnesium oxide, magnesium hydroxide, calcium oxide, zinc hydroxide, strontium hydroxide, cadmium oxide, cadmium hydroxide, barium oxide, aluminum oxide, iron carbonate, copper hydroxide, copper oxide, lead hydroxide, tin butyl- ate, cobalt hydroxide, nickel hydroxide, nickel carbonate, zinc oxide, etc.
- the incorporation of certain ingredients such as small amounts of the metal acetate or acetic acid in conjunction with the metal reactant will facilitate the reaction and result in an improved product.
- certain ingredients such as small amounts of the metal acetate or acetic acid in conjunction with the metal reactant will facilitate the reaction and result in an improved product.
- the alkyl groups R 3 and R 4 are derived from secondary alcohols such as isopropyl alcohol, secondary butyl alcohol, 2-pentanol, 2-methyl-4- pentanol, 2-hexanol, 3-hexanol, etc.
- Especially useful metal phosphorodithioates can be prepared from phosphorodithioic acids which in turn are prepared by the reaction of phosphorus pentasulfide with mixtures of alcohols.
- the use of such mix ⁇ tures enables the utilization of cheaper alcohols which in themselves may not yield oil-soluble phosphorodithioic acids or salts thereof.
- a mixture of isopropyl and hexyl alcohols can be used to produce a very effective, oil-soluble metal phosphorodithioate.
- mixtures of phosphorodithioic acids can be reacted with the metal compounds to form less expensive, oil-soluble salts.
- the mixtures of alcohols may be mixtures of dif ⁇ ferent primary alcohols, mixtures of different secondary alcohols or mixtures of primary and secondary alcohols.
- useful mixtures include: n-butanol and n-oc- tanol; n-pentanol and 2-ethyl-l-hexanol; isobutanol and n-hexanol; isobutanol and isoamyl alcohol; isopropanol and 2-methyl-4-pentanol; isopropanol and sec-butyl alcohol; isopropanol and isooctyl alcohol; etc.
- Particularly useful alcohol mixtures are mixtures of secondary alcohols con ⁇ taining at least about 20 mole percent of isopropyl alco ⁇ hol, and in a preferred embodiment, at least 40 mole percent of isopropyl alcohol.
- the oil compositions of the present invention will contain varying amounts of one or more of the above-identified metal dithiophosphates such as from about 0.01 to about 2% by weight, and more generally from about 0.01 to about 1% by weight based on the weight of the total oil composition.
- the metal dithiophosphates are added to the lubricating oil compositions of the invention to improve the anti-wear and antioxidant properties of the oil compositions.
- Example C-l A phosphorodithioic acid is prepared by reacting a mixture of alcohols comprising 6 moles of 4-methyl-2- pentanol and 4 moles of isopropyl alcohol with phosphorus pentasulfide. The phosphorodithioic acid then is reacted with an oil slurry of zinc oxide. The amount of zinc oxide in the slurry is about 1.08 times the theoretical amount required to completely neutralize the phosphorodithioic acid. The oil solution of the zinc phosphorodithioate obtained in this manner (10% oil) contains 9.5% phosphorus, 20.0% sulfur and 10.5% zinc.
- metal phosphoro ⁇ dithioates useful in the lubricating oils of the present invention are listed in the following table. These metal dithiophosphates are prepared by the general procedure of Example C-l.
- Another class of the phosphorodithioate additives contemplated for use in the lubricating composition of this invention comprises the adducts of the metal phosphorodi ⁇ thioates described above with an epoxide.
- the metal phosphorodithioates useful in preparing such adducts are for the most part the zinc phosphorodithioates.
- the epox- ides may be alkylene oxides or arylalkylene oxides.
- the arylalkylene oxides are exemplified by styrene oxide, p-ethylstyrene oxide, alpha-methylstyrene oxide, 3-beta- naphthyl-l,l,3-butylene oxide, m-dodecylstyrene oxide, and p-chlorostyrene oxide.
- the alkylene oxides include princi ⁇ pally the lower alkylene oxides in which the alkylene radical contains 8 or less carbon atoms.
- lower alkylene oxides examples include ethylene oxide, propylene oxide, 1,2-butene oxide, trimethylene oxide, tetramethylene oxide, butadiene monoepoxide, 1,2-hexene oxide, and epichlorohy- drin.
- epoxides useful herein include, for example, butyl 9,10-epoxy-stearate, epoxidized soya bean oil, epoxidized tung oil, and epoxidized copolymer of styrene with butadiene.
- the adduct may be obtained by simply mixing the metal phosphorodithioate and the epoxide.
- the reaction is usually exothermic and may be carried out within wide temperature limits from about 0°C to about 300 ⁇ C. Because the reaction is exothermic, it is best carried out by adding one reactant, usually the epoxide, in small incre ⁇ ments to the other reactant in order to obtain convenient control of the temperature of the reaction.
- the reaction may be carried out in a solvent such as benzene, toluene, xylene, mineral oil, naphtha, or n-hexene.
- the preparation of such adducts is more speci ⁇ fically illustrated by the following examples.
- a reactor is charged with 2365 parts (3.33 moles) of the zinc isopropyl-isooctyl phosphorodithioate (wherein the molar ratio of isopropyl to isooctyl is (1:0.7)), and while stirring at room temperature, 38.6 parts (0.67 mole) of propylene oxide are added with an exotherm of from
- Another class of the phosphorodithioate additives contemplated as useful in the lubricating compositions of the invention comprises mixed metal salts of (a) at least one phosphorodithioic acid as defined above and (b) at least one aliphatic or alicyclic carboxylic acid.
- the carboxylic acid may be a monocarboxylic or polycarboxylic acid, usually containing from 1 to about 3 carboxy groups, preferably one. It may contain from about 2 to about 40, preferably from about 2 to about 20 carbon atoms, and advantageously about 5 to about 20 carbon atoms.
- the carboxylic acid may be any of the above-described carbox ⁇ ylic acids.
- the preferred carboxylic acids are those having the formula R 5 COOH, wherein R 5 is an aliphatic or alicyclic hydrocarbon-based radical preferably free from acetylenic unsaturation.
- Suitable acids include the butanoic, pentanoic, hexanoic, octanoic, nonanoic, deca- noic, dodecanoic, octadecanoic and eicosanoic acids, as well as olefinic acids such as oleic, linoleic, and lino- lenic acids and linoleic acid dimer.
- R 5 is a saturated aliphatic group and especially a branched alkyl group such as the isopropyl or 3-heptyl group.
- Illustrative polycarboxylic acids are succinic, alkyl- and alkenylsuccinic, adipic, sebacic and citric acids.
- the mixed metal salts may be prepared by merely blending a metal salt of a phosphorodithioic acid with a metal salt of a carboxylic acid in the desired ratio.
- the ratio of equivalents of phosphorodithioic to carboxylic acid salts is between about 0.5:1 to about 400:1.
- the ratio is between about 0.5:1 and about 200:1.
- the ratio can be from about 0.5:1 to about 100:1, preferably from about 0.5:1 to about 50:1, and more preferably from about 0.5:1 to about 20:1.
- the ratio can be from about 0.5:1 to about 4.5:1, preferably about 2.5:1 to about 4.25:1.
- the equiva ⁇ lent weight of a phosphorodithioic acid is its molecular weight divided by the number of -PSSH groups therein, and that of a carboxylic acid is its molecular weight divided by the number of carboxy groups therein.
- a second and preferred method for preparing the mixed metal salts useful in this invention is to prepare a mixture of the acids in the desired ratio and to react the acid mixture with one of the above described metal com- pounds.
- this method of preparation it is frequently possible to prepare a salt containing an excess of metal with respect to the number of equivalents of acid present; thus, mixed metal salts containing as many as 2 equivalents and especially up to about 1.5 equivalents of metal per equivalent of acid may be prepared.
- the equiv ⁇ alent of a metal for this purpose is its atomic weight divided by its valence.
- Variants of the above-described methods may also be used to prepare the mixed metal salts useful in this invention.
- a metal salt of either acid may be blended with an acid of the other, and the resulting blend reacted with additional metal base.
- the temperature at which the mixed metal salts are prepared is generally between about 30°C and about 150°C, preferably up to about 125°C. If the mixed salts are prepared by neutralization of a mixture of acids with a metal base, it is preferred to employ temperatures above about 50°C and especially above about 75°C. It is fre ⁇ quently advantageous to conduct the reaction in the pres- ence of a substantially inert, normally liquid organic diluent such as naphtha, benzene, xylene, mineral oil or the like. If the diluent is mineral oil or is physically and chemically similar to mineral oil, it frequently need not be removed before using the mixed metal salt as an additive for lubricants or functional fluids.
- U.S. Patents 4,308,154 and 4,417,990 describe procedures for preparing these mixed metal salts and disclose a number of examples of such mixed salts. Such disclosures of these patents are hereby incorporated by reference.
- Example C-15 A mixture of 67 parts (1.63 equivalents) of zinc oxide and 48 parts of mineral oil is stirred at room temperature and a mixture of 401 parts (1 equivalent) of di-(2-ethylhexyl) phosphorodithioic acid and 36 parts (0.25 equivalent) of 2-ethylhexanoic acid is added over 10 minutes. The temperature increases to 40°C during the addition. When addition is complete, the temperature is increased to 80°C for 3 hours. The mixture is then vacuum stripped at 100 ⁇ C to yield the desired mixed metal salt as a 91% solution in mineral oil. P.
- compositions of the present invention also include an antioxidant (D) , with the proviso that (D) the antioxidant and (C) the metal dithiophosphate are not the same.
- (C) and (D) may both be metal dithio ⁇ phosphates provided that the metal of (C) is not the same as the metal of (D) .
- the antioxidants are selected from the group consisting of: sulfur-containing compositions, alkylated aromatic amines, phenols, and oil-soluble transi ⁇ tion metal containing compounds.
- the antioxidant also may be one -or more sulfur- containing compositions.
- Materials which may be sulfurized to form the sulfurized organic compositions of the present invention include oils, fatty acids or esters, olefins or polyolefins made thereof or Diels-Alder adducts.
- Oils which may be sulfurized are natural or synthetic oils including mineral oils, lard oil, carboxylic acid esters derived from aliphatic alcohols and fatty acids or aliphatic carboxylic acids (e.g., myristyl oleate and oleyl oleate) sperm whale oil, synthetic sperm whale oil substitutes and synthetic unsaturated esters or glycerides.
- Fatty acids generally contain from about 8 to about 30 carbon atoms.
- the unsaturated fatty acids gener ⁇ ally contained in the naturally occurring vegetable or animal fats and such acids include palmitoleic acid, oleic acid, linoleic acid, linolenic acid, and erucic acid.
- the fatty acids may comprise mixtures of acids, such as those obtained from naturally occurring animal and vegetable oils, including beef tallow, depot fat, lard oil, tall oil, peanut oil, corn oil, safflower oil, sesame oil, poppy-seed oil, soybean oil, cottonseed oil, sunflower seed oil, or wheat germ oil.
- Tall oil is a mixture of rosin acids, mainly abietic acid, and unsaturated fatty acids, mainly oleic and linoleic acids.
- Tall oil is a by-product of the sulfate process for the manufacture of wood pulp.
- the fatty acid esters also may be prepared from aliphatic olefinic acids of the type described above by reaction with any of the above-described alcohols and poly- ols.
- aliphatic alcohols include monohydric alcohols such as methanol, ethanol; n- or isopropanol; n-, iso-, sec-, or tertbutanol, etc.; and polyhydric alcohols including ethylene glycol, propylene glycol, trimethylene glycol, neopentyl glycol, glycerol, etc.
- the olefinic compounds which may be sulfurized are diverse in nature. They contain at least one olefinic double bond, which is defined as a non-aromatic double bond; that is, one connecting two aliphatic carbon atoms.
- R * groups in the above formula which are not hydrogen may be satisfied by such groups as -C(R *5 ) 3 , -COOR *5 , -CON(R *5 ) 2 , -COON(R *5 ) 4 , -COOM, -CN, -X, -YR *5 or -Ar, wherein: each R" 5 is independently hydrogen, alkyl, alke- nyl, aryl, substituted alkyl, substituted alkenyl or substituted aryl, with the proviso that any two R *5 groups can be alkylene or substituted alkylene whereby a ring of up to about 12 carbon atoms is formed;
- M is one equivalent of a metal cation (preferably Group I or II, e.g., sodium, potassium, barium, calcium);
- X is halogen (e.g., chloro, bromo, or iodo) ;
- Y is oxygen or divalent sulfur
- Ar is an aryl or substituted aryl group of up to about 12 carbon atoms.
- R *1 , R *2 , R *3 and R *4 may also together form an alkylene or substituted alkylene group; i.e., the olefinic compound may be alicyclic.
- the olefinic compound is usually one in which each R group which is not hydrogen is independently alkyl, alkenyl or aryl group. Monoolefinic and diolefinic com- pounds, particularly the former, are preferred, and espe ⁇ cially terminal monoolefinic hydrocarbons; that is, those compounds in which R *3 and R *4 are hydrogen and R *1 and R *2 are alkyl or aryl, especially alkyl (that is, the olefin is aliphatic) having 1 to about 30, preferably 1 to about 16, more preferably 1 to about 8, and more preferably 1 to about 4 carbon atoms. Olefinic compounds having about 3 to 30 and especially about 3 to 16 (most often less than 9) carbon atoms are particularly desirable.
- Isobutene, propylene and their dimers, trimers and tetramers, and mixtures thereof are especially pre ⁇ ferred olefinic compounds.
- isobutylene and diisobutylene are particularly desirable because of their availability and the particularly high sulfur con ⁇ taining compositions which can be prepared therefrom.
- the sulfurized organic compound is a sulfurized terpene compound.
- terpene compound as used in the specification and claims is intended to include the various isomeric terpene hydro- carbons having the empirical formula C 10 H ⁇ 6 , such as con ⁇ tained in turpentine, pine oil and dipentenes, and the various synthetic and naturally occuring oxygen-containing derivatives.
- Pine oil for example, comprises a mixture of alpha-terpineol, beta-terpineol, alpha-fenchol, camphor, borneol/isoborneol, fenchone, estragole, dihydro alpha-terpineol, anethole, and other mono-terpene hydrocarbons.
- the specific ratios and amounts of the various components in a given pine oil will depend upon the particular source and the degree of purification. A group of pine oil-derived products are available commer ⁇ cially from Hercules Incorporated.
- pine oil products generally known as terpene alcohols available from Hercules Incorporated are particularly useful in the preparation of the sulfurized products of the invention.
- Pine oil products are available from Hercules under such designations as alpha-Terpineol, Terpineol 318 Prime, Yarmor 302, Herco pine oil, Yarmor 302W, Yarmor F and Yarmor 60.
- the sulfurized organic composition is at least one sulfur-containing material which comprises the reaction product of a sulfur source and at least one Diels-Alder adduct.
- the molar ratio of sulfur source to Diels-Alder adduct is in a range of from about 0.75 to about 4.0, preferably about 1 to about 2.0, more preferably about 1 to about 1.8. In one embodiment the molar ratio of sulfur to adduct is from about 0.8:1 to 1.2:1.
- the Diels-Alder adducts are a well-known, art- recognized class of compounds prepared by the diene synthe ⁇ sis or Diels-Alder reaction.
- the diene synthesis involves the reaction of at least one conjugated diene with at least one ethylenically or acetylenically unsaturated compound, these latter compounds being known as dienophiles.
- Piperylene, isoprene, methylisoprene, chloro- prene, and 1,3-butadiene are among the preferred dienes for use in preparing the Diels-Alder adducts.
- cyclic dienes examples include the cyclopentadienes, fulvenes, 1,3-cy- clohexadienes, 1,3-cycloheptadienes, 1,3,5-cycloeptatri- enes, cyclooctatetraene, and 1,3,5-cyclononatrienes.
- a preferred class of dienophiles are those having at least one electron-accepting groups selected from groups such as formyl, cyano, nitro, carboxy, carbohydrocarbyloxy, etc.
- the hydrocarbyl and substituted hydrocarbyl groups if not present, will not contain more than 10 carbon atoms each.
- One preferred class of dienophiles are those wherein at least one carboxylic ester group represented by -C(0)0-R_ where R 0 is the residue of a saturated aliphatic alcohol of up to about 40 carbon atoms, the aliphatic alcohol from which -R fre is derived can be any of the above- described mono or polyhydric alcohols.
- the alcohol is a lower aliphatic alcohol, more preferably methanol, ethanol, propanol, or butanol.
- acetylenically unsatu ⁇ rated dienophiles such as propiolaldehyde, methyl-ethynyl- ketone, propylethynylketone, propenylethynylketone, propio- lie acid, propiolic acid nitrile, ethyl-propiolate, tetro- lic acid, propargylaldehyde, acetylene-dicarboxylic acid, the dimethyl ester of acetylenedicarboxylic acid, diben- zoylacetylene, and the like.
- the adducts involve the reaction of equimolar amounts of diene and dienophile.
- dienophile has more than one ethylenic linkage, it is possible for additional diene to react if present in the reaction mixture.
- materials useful as sulfurization promoters may be acidic, basic or neutral.
- Useful neutral and acidic materials include acidified clays such as "Super Filtrol" (sulfuric acid treated diatomaceous earth) , p-toluenesulfonic acid, phosphorus-containing re- agents such as phosphorus acids (e.g., dialkyl-phosphorodi- thioic acids, phosphorus acid esters (e.g., triphenyl phos ⁇ phate) , phosphorus sulfides such as phosphorus pentasulfide and surface active agents such as lecithin.
- phosphorus acids e.g., dialkyl-phosphorodi- thioic acids
- phosphorus acid esters e.g., triphenyl phos ⁇ phate
- phosphorus sulfides such as phosphorus pentasulfide and surface active agents such as lecithin.
- the preferred promoters are basic materials. These may be inorganic oxides and salts such as sodium hydroxide, calcium oxide and sodium sulfide.
- the most desirable basic promoters are nitrogen bases including ammonia and amines.
- the amount of promoter material used is generally about 0.0005-2.0% of the combined weight of the terpene and olefinic compounds. In the case of the preferred ammonia and amine catalysts, about 0.0005-0.5 mole per mole of the combined weight is preferred, and about 0.001-0.1 is espe ⁇ cially desirable.
- Water is also present in the reaction mixture either as a promoter or as a diluent for one or more of the promoters recited hereinabove. The amount of water, when present, is usually about 1-25% by weight of the olefinic compound. The presence of water is, however, not essential and when certain types of reaction equipment are used it may be advantageous to conduct the reaction under substan ⁇ tially anhydrous conditions.
- reaction mixture When promoters are incorporated into the reaction mixture as described hereinabove, it is generally observed that the reaction can be conducted at lower temperatures, and the product generally is lighter in color.
- the sulfur source or reagent used for preparing any of the sulfur-containing materials of this invention may be, for example, sulfur, a sulfur halide such as sulfur monochloride or sulfur dichloride, a mixture of hydrogen sulfide and sulfur or sulfur dioxide, or the like. Sulfur, or mixtures of sulfur and hydrogen sulfide often are preferred. However, it will be understood that other sulfurization reagents may, when appropriate, be substitut ⁇ ed therefor. Commercial sources of all the sulfurizing reagents are normally used for the purpose of this inven ⁇ tion, and impurities normally associated with these commer ⁇ cial products may be present without adverse results.
- the reaction is effected by merely heating the reagents with the sulfur at temperatures of from about 50 to 250°C, usually, from about 150 to about 210°C.
- the weight ratio of the materials to be sulfurized to sulfur is between about 5:1 and about 15:1, generally between about 5:1 and about 10:1.
- the sulfurization reaction is conducted with efficient agitation and general ⁇ ly in an inert atmosphere (e.g., nitrogen). If any of the components or reagents are appreciably volatile at the reaction temperature, the reaction vessel may be sealed and maintained under pressure. It is frequently advantageous to add the sulfur portionwise to the mixture of the other components.
- the amounts of sulfur and hydrogen sulfide per mole of component(s) to be sulfurized are, respectively, usually about 0.3 to about 3 gram-atoms and about 0.1 to about 1.5 moles.
- a preferred range is from about 0.5 to about 2.0 gram-atoms and about 0.4 to about 1.25 moles, respectively, and the most desir ⁇ able ranges are about 0.8 to about 1.8 gram-atoms, and about 0.4 to about 0.8 mole, respectively.
- the components are introduced at levels to provide these ranges.
- reaction vessels In semi-continuous operations, they may be admixed at any ratio, but on a mass balance basis, they are present so as to be consumed in amounts within these ratios.
- the reaction vessel is initially charged with sulfur alone, the terpene and/or olefinic compound and hydrogen sulfide are added incrementally at a rate such that the desired ratio is obtained.
- the temperature range of the sulfurization reaction is generally from about 50 to about 350°C.
- the preferred range is about 100° to about 200°C with about 120° to about 180°C being especially suitable.
- the reaction often is conducted under super atmospheric pressure which may be and usually is autogenous pressure (i.e., pressure which naturally developed during the course of the reaction) , but may also be externally applied pressure.
- the exact pressure developed during the reaction is dependent upon such factors as design and operation of the system, the reaction temperature, and the vapor pressure of the reactants and products, and it may vary during the course of the reaction.
- reaction mixture consists entirely of the components and reagents described above
- reaction also may be effected in the presence of an inert solvent (e.g., an alcohol, ether, ester, aliphatic hydrocarbon, halogenated aromatic hydro ⁇ carbon, etc.) which is liquid within the temperature range employed.
- an inert solvent e.g., an alcohol, ether, ester, aliphatic hydrocarbon, halogenated aromatic hydro ⁇ carbon, etc.
- the reaction temperature is relatively high, for example, at about 200°C, there may be some evolu ⁇ tion of sulfur from the product which is avoided is a lower reaction temperature such as from about 150-170 ⁇ C is used.
- active sulfur includes sulfur in a form which can cause staining of copper and similar materials, and stan ⁇ dard tests are available to determine sulfur activity.
- metal deactivators can be used with the lubricants contain ⁇ ing sulfurized compositions. The following examples relate to sulfurized compositions of the present invention.
- Example D-l A reaction vessel is charged with 780 parts isopropyl alcohol, 752 parts water, 35 parts of a 50% by weight aqueous solution of sodium hydroxide, 60 parts of sulfuric acid treated diatomaceous earth (Super Filtrol available from Engelhard Corporation, Menlo Park, New Jersey) and 239 parts of sodium sulfide. The mixture is stirred and heated to 77-80°C. The reaction temperature is maintained for two hours.
- the mixture is cooled to 71°C where 1000 parts of the sulfurized olefin prepared by reacting 337 parts of sulfur monochloride with 1000 parts of a mixture of 733 parts of 1-dodecene and 1000 parts of Neodene 1618, a C ⁇ g olefin mixture available from Shell Chemical, is added to the mixture.
- the reaction mixture is heated to 77-80°C and the temperature is maintained until the chlorine content is a maximum of 0.5.
- the reaction mixture is vacuum stripped to 80°C and 20 millimeters of mercury.
- the residue is filtered through diatomaceous earth.
- the filtrate has 19.0% sulfur and a specific gravity of 0.95.
- Example D-2 A mixture of 100 parts of soybean oil and 50 parts of commercial C 16 ⁇ -olefins is heated to 175 ⁇ C. under nitrogen and 17.4 parts of sulfur is added gradually, whereupon an exothermic reaction causes the temperature to rise to 205°C. The mixture is heated at 188°-200°C. for 5 hours, allowed to cool gradually to 90°C. and filtered to yield the desired product containing 10.13% sulfur.
- Example D-3 A mixture of 100 parts of soybean oil and 50 parts of commercial C 16 ⁇ -olefins is heated to 175 ⁇ C. under nitrogen and 17.4 parts of sulfur is added gradually, whereupon an exothermic reaction causes the temperature to rise to 205°C. The mixture is heated at 188°-200°C. for 5 hours, allowed to cool gradually to 90°C. and filtered to yield the desired product containing 10.13% sulfur.
- Example D-3 A mixture of 100 parts of soybean oil and 50 parts of commercial C 16 ⁇ -olefins is heated to 175 ⁇ C. under
- a mixture of 100 parts of soybean oil, 3.7 parts of tall oil acid and 46.3 parts of commercial Ci 5 _ Ig ⁇ -olefins is heated to 165°C. under nitrogen and 17.4 parts of sulfur is added. The temperature of the mixture rises to 191°C. It is maintained at 165°-200°C. for 7 hours and is then cooled to 90°C. and filtered. The product contains 10.13% sulfur.
- Example D-4 A mixture of 93 parts (0.5 equivalent) of pine oil and 48 parts (1.5 equivalents) of sulfur is charged to a reaction vessel equipped with condenser, thermometer and stirrer. The mixture is heated to about 140°C with nitro ⁇ gen blowing and maintained at this temperature for about 28 hours. After cooling. 111 parts of a C 16 alpha-olefin (available from Gulf Oil Chemicals Company under the general trade name Gulftene 16) are added through an addition funnel, and after addition is complete, the addition funnel is replaced with a nitrogen tube. The reaction mixture is heated to 170°c with nitrogen blowing and maintained at the temperature for about 5 hours. The ixture is cooled and filtered through a filter aid. The filtrate is the desired product having a sulfur content of 19.01% (theory 19.04%).
- a C 16 alpha-olefin available from Gulf Oil Chemicals Company under the general trade name Gulftene 16
- Example D-5 (a) A mixture comprising 400 grams of toluene and 66.7 grams of aluminum chloride is charged to a two- liter flask fitted with a stirrer, nitrogen inlet tube, and a solid carbon dioxide-cooled reflux condenser. A second mixture comprising 640 grams (5 moles) of butylacrylate and 240.8 grams of toluene is added to the A1C1 3 slurry over a 0.25-hour period while maintaining the temperature within the range of 37-58°C. Thereafter, 313 grams (5.8 moles) of butadiene are added to the slurry over a 2.75-hour period while maintaining the temperature of the reaction mass at 60-61°C by means of external cooling.
- reaction mass is blown with nitrogen for about 0.33-hour and then trans ⁇ ferred to a four-liter separatory funnel and washed with a solution of 150 grams of concentrated hydrochloric acid in 1100 grams of water. Thereafter, the product is subjected to two additional water washings using 1000 ml of water for each wash. The washed reaction product is subsequently distilled to remove unreacted butylacrylate and toluene. The residue of this first distillation step is subjected to further distillation at a pressure of 9-10 millimeters of mercury whereupon 785 grams of the desired adduct are collected over the temperature of 105-115°C.
- Component (D) may also be an alkylated aromatic amine.
- Alkylated aromatic amines include compounds repre- sented by the formula
- Ar 3 and Ar 4 are independently mononuclear or polynu ⁇ clear, substituted or unsubstituted aromatic groups; and R 6 is hydrogen, halogen, OH, NH 2 , SH, N0 2 or a hydrocarbyl group of from 1 to about 50 carbon atoms.
- Ar 3 and Ar 4 may be any of the above-described aromatic groups.
- the number of substituents on Ar 3 and/or Ar 4 range independently up to the number of positions available on Ar 3 and/or Ar 4 for substi ⁇ tution.
- substituents are independently selected from the group consisting of halogen (e.g. , chlorine, bromine, etc.), OH, NH 2 , SH, N0 2 or hydrocarbyl groups of from 1 to about 50 carbon atoms.
- component (D) is represented by the formula
- R 7 n or hydrocarbyl groups of from 1 to about 50 carbon atoms, preferably hydrocarbyl groups of from about 4 to about 20 carbon atoms.
- aromatic amines include P,P'-dioctyldi- phenylamine; octylphenyl-beta-naphthylamine; octylphenyl- alpha-naphthylamine, phenyl-alpha-naphthylamine; phenyl- beta-naphthylamine; p-octylphenyl-alpha-naphthylamine and 4-octylphenyl-l-octyl-beta-naphthylamine and di(nonyl- phenyl)amine, with di(nonylphenyl)amine preferred.
- the antioxidants (D) of the present invention may contain one or more of several types of phenolic compounds which may be metal-free phenolic compounds.
- the antioxidant of the present invention includes at least one metal-free hindered phenol.
- Alkylene coupled derivatives of said hindered phenols also can be used.
- Hindered phenols are defined (in the specifi- cation and claims) as those containing a sterically hinder ⁇ ed hydroxyl group, and these include those derivatives of dihydroxy aryl compounds wherein the hydroxyl groups are in the o- or p-position to each other.
- the metal-free hindered phenols may be represent- ed by the following Formulae I, II and III.
- each R 9 is independently an alkyl group containing from 3 to about 9 carbon atoms
- each R 10 is hydrogen or an alkyl group
- R 11 is hydrogen or an alkyl group containing from 1 to about 9 carbon atoms
- each R 12 is independent- ly hydrogen or a methyl group.
- R 10 is an alkyl group containing from about 3 to about 50 carbon atoms, preferably about 6 to about 20, more preferably from about 6 to about 12. Examples of such groups include hexyl, heptyl, octyl, decyl, dodecyl, tripropenyl, tetrapropenyl, etc.
- R 9 , R 10 and R 11 groups include propyl, isopropyl, butyl, secondary butyl, tertiary butyl, heptyl, octyl, and nonyl.
- each R 9 and R u are tertiary groups such as tertiary butyl, tertiary amyl, etc.
- the phenolic compounds of the type represented by Formula I may be prepared by various tech ⁇ niques, and in one embodiment, such phenols are prepared in stepwise manner by first preparing the para-substituted alkyl phenol, and thereafter alkylating the para-substi ⁇ tuted phenol in the 2- and/or 6-position as desired.
- the second step alkyla- tion is conducted under conditions which result in the alkylation of only one of the positions ortho to the hydroxyl group.
- useful phenolic materials of the type represented by Formula I include: 2-t-butyl- 4-heptyl phenol; 2-t-butyl-4-octyl phenol; 2-t-butyl-4- dodecyl phenol; 2,6-di-t-butyl-4-butylphenol; 2,6-di- t-butyl-4-heptyl phenol; 2,6-di-t-butyl-4-dodecyl phenol; 2-methyl-6-di-t-butyl-4-heptyl phenol; 2 ,4-dimethyl-6-t- butyl phenol; 2,6-t-butyl-4-ethyl phenol; 4-t-butyl cate- chol; 2,4-di-t-butyl cate- chol; 2,4-di-t-butyl cate-
- Examples of the ortho coupled phenols of the type represented by Formula II include: 2,2'-bis(6-t- butyl-4- heptyl phenol); 2,2'-bis(6-t-butyl-4-octyl phenol); 2,6- bis-(l / -methylcyclohexyl)-4-methyl phenol; and 2,2'-bis(6- t-butyl-4rdodecyl phenol) .
- Alkylene-coupled phenolic compounds of the type represented by Formula III can be prepared from the phenols represented by Formula I wherein R 11 is hydrogen by reaction of the phenolic compound with an aldehyde such as formalde ⁇ hyde, acetaldehyde, etc. or a ketone such as acetone.
- aldehyde such as formalde ⁇ hyde, acetaldehyde, etc.
- ketone such as acetone
- the phenolic compound of the type represented by Formula I wherein R 11 is hydrogen is heated with a base in a diluent such as toluene or xylene, and this mixture is then contacted with the aldehyde or ketone while heating the mixture to reflux and removing water as the reaction progresses.
- a diluent such as toluene or xylene
- phenolic compounds of the type represented by Formula III include 2,2'-methylene-bis(6-t-buty1-4-heptylphenol) ; 2,2'-methyl- ene-bis(6-t-butyl-4-octyl phenol); 2,2'-methylene-bis-(4- dodecyl-6-t-butyl phenol); 2,2'-methylene-bis-(4-octy1-6- t-butyl phenol); 2,2'-methylene-bis-(4-octyl phenol); 2,2'-methylene-bis-(4-dodecyl phenol) ; 2,2'-methylene-bis- (4-heptyl phenol); 2,2'-methylene-bis(6-t-butyl-4-dodecyl phenol) ; 2,2'-methylene-bis(6-t-buty1-4-tetrapropenyl phenol); and 2,2'methylene-bis(6-t-butyl
- the alkylene-coupled phenols may be obtained by reacting a phenol (2 equivalents) with 1 equivalent of an aldehyde or ketone.
- Lower molecular weight aldehydes are preferred and particularly preferred examples of useful aldehydes include formaldehyde, a reversible polymer thereof such as paraformaldehyde, trioxane, acetaldehyde, etc.
- formaldehyde a reversible polymer thereof
- formaldehyde a reversible polymer thereof
- trioxane acetaldehyde
- acetaldehyde etc.
- the word "formaldehyde” shall be deemed to include such reversible polymers.
- the alkylene-coupled phenols can be derived from phenol or substituted alkyl phenols, and substitued alkyl phenols are preferred. The phenol must have an ortho or para position available for reaction with the aldehyde.
- the phenol will contain one or more alkyl groups which may or may not result in a steri- cally hindered hydroxyl group.
- hindered phenols which can be used in the formation of the alkylene- coupled phenols include: 2,4-dimethylphenol; 2,4-di-t- butyl phenol, 2,6-di-t-butyl phenol; 4-octyl-6-t-butyl phenol; etc.
- the phenol from which the alkylene-coupled phenols are prepared are phenols substituted in the para position with aliphatic groups containing at least 6 carbon atoms as described above. Generally, the alkyl groups contain from 6 to 12 carbon atoms.
- Preferred alkyl groups are derived from polymers of ethylene, propylene, 1-butene and isobutene, preferably propylene tetramer or trimer.
- the reaction between the phenol and the aldehyde, polymer thereof or ketone is usually carried out between room temperature and about 150°C, preferably about 50-125°C.
- the reaction preferably is carried out in the presence of an acidic or basic material such as hydrochlo ⁇ ric acid, acetic acid, ammonium hydroxide, sodium hydroxide or potassium hydroxide.
- an acidic or basic material such as hydrochlo ⁇ ric acid, acetic acid, ammonium hydroxide, sodium hydroxide or potassium hydroxide.
- the relative amounts of the reagents used are not critical, but it is generally conve ⁇ nient to use about 0.3 to about 2.0 moles of phenol per equivalent of formaldehyde or other aldehyde.
- Example D-6 A reaction vessel is charged with 3192 parts (12 moles) of a 4-tetrapropenyl phenol. The phenol is heated to 80°C in 30 minutes and 21 parts (0.2 mole) of a 93% sulfuric acid solution is added to the vessel. The mixture is heated to 85°C and 1344 parts (24 moles) of isobutylene is added over 6 hours. The temperature is maintained between 85-91°C. After introduction of isobutylene, the reaction is blown with nitrogen at 2 standard cubic feet per hour for 30 minutes at 85°C. Calcium hydroxide (6 parts, 0.2 mole) along with 12 parts of water is added to the reaction vessel.
- the mixture is heated to 130°C under nitrogen for 1.5 hours.
- the reaction is vacuum stripped at 130°C and 20 millimeters of mercury for 30 minutes.
- the residue is cooled to 90°C and the residue is filtered through diatomaceous earth to give the desired product.
- the desired product has a specific gravity of 0.901 and a percent hydroxyl (Grignard) equals 4.25 (theoretical 4.49).
- Example D-7 A reaction vessel is charged with 798 parts (3 moles) of 4-tetrapropenyl phenol. The phenol is heated to 95-100°C where 5 parts of a 93% solution of sulfuric acid is added to the vessel. 168 parts (3 moles) of isobutylene is added to the vessel over 1.7 hours at 100°C. After introduction of the isobutylene the reaction is blown with nitrogen at 2 standard cubic feet per hour for one-half hour at 100°C. 890 parts of the above-described phenol (2.98 moles) is added to a reaction vessel and heated to 34-40°C. A 37% aqueous formaldehyde solution (137 grams, 1.7 moles) is added to the vessel. The mixture is heated to 135°C with removal of water.
- Nitrogen blowing at 1.5 scfh begins at 105-110°C.
- the reaction is held at 120°C for 3 hours under nitrogen.
- the reaction is cooled to 83°C where 4 parts (0.05 mole) of a 50% aqueous sodium hydroxide solution is added to the vessel.
- the reaction is heated to 135°C under nitrogen.
- the reaction is vacuum stripped to 135 q C and 20 millimeters of mercury for 10 minutes.
- the reaction is cooled to 95°C and the residue is filtered through diatomaceous earth.
- the product has a percent hydroxyl (Grignard) of 5.47 (theoretical 5.5) and a molecu ⁇ lar weight (vapor phase osmometry) of 682 (theoretical 667) .
- Example D-8 The general procedure of Example D-6 is repeated except that the 4-heptyl phenol is replaced by an equiva ⁇ lent amount of tri-propylene phenol.
- the substituted phenol obtained in this manner contains 5.94% hydroxyl.
- Example D-9 The general procedure of Example D-7 is repeated except that the phenol of Example D-6 is replaced by the phenol of Example D-8.
- the methylene coupled phenol prepared in this manner contains 5.74% hydroxyl.
- the lubricant compositions of the present invention may contain a metal-free (or ash- less) alkyl phenol sulfide.
- alkyl phenols from which the sulfides are prepared also may comprise phenols of the type discussed above and represented by Formula I wherein R 11 is hydrogen.
- alkyl phenols which can be converted to alkyl phenol sulfides include: 2-t-butyl- 4-heptyl phenol;
- alkylphenol sulfides is meant to include di-(alkylphenol)monosulfides, disulfides, poly- sulfides, and other products obtained by the reaction of the alkylphenol with sulfur monochloride, sulfur dichloride or elemental sulfur.
- One mole of phenol is reacted with about 0.5-1.5 moles, or higher, or sulfur compound.
- the alkyl phenol sulfides are readily obtained by mixing, one mole of an alkylphenol and 0.5-2.0 moles of sulfur dichloride.
- the reaction mixture is usually main- tained at about 100°C for about 2-5 hours, after which time the resulting sulfide is dried and filtered.
- temperatures of about 150-250°C or higher are typically used. It is also desirable that the drying operation be conducted under nitrogen or a similar inert gas.
- Suitable basic alkyl phenol sulfides are dis ⁇ closed, for example, in U.S. Patents 3,372,116; 3,410,798; and 4,021,419, which are hereby incorporated by reference.
- These sulfur-containing phenolic compositions described in U.S. Patent 4,021,419 are obtained by sulfu- rizing a substituted phenol with sulfur or a sulfur halide and thereafter reacting the sulfurized phenol with formal ⁇ dehyde or a reversible polymer thereof.
- the substituted phenol can be first reacted with formaldehyde and thereafter reacted with sulfur or a sulfur halide to produce the desired alkyl phenol sulfide.
- the disclosure of U.S. Patent 4,021,419 is hereby incorporated by refer ⁇ ence for its disclosure of such compounds, and methods for preparing such compounds.
- a synthetic oil of the type described below is used in place of any mineral or natural oils used in the preparation of the salts for use in this invention.
- the antioxidant (D) may be phenothiazine, substituted phenothiazines, or derivatives such as represented by Formula IV
- R 14 is selected from the group consisting of higher alkyl groups, or an alkenyl, aryl, alkaryl or aralkyl group and mixtures thereof;
- R 13 is an alkylene, alkenylene or an aralkylene group, or mixtures thereof; each R 15 is indepen ⁇ dently alkyl, alkenyl, aryl, alkaryl, arylalkyl, halogen, hydroxyl, alkoxy, alkylthio, arylthio, or fused aromatic rings, or mixtures thereof;
- a and b are each independently 0 or greater.
- the phenothiazine deriva ⁇ tives may be represented by Formula V
- R 13 , R 14 , R 15 , a and b are as defined with respect to Formula IV.
- a dialkyldi- phenylamine is treated with sulfur at an elevated tempera ⁇ ture such as in the range of 145°C to 205°C for a suffi ⁇ cient time to complete the reaction.
- a catalyst such as iodine may be utilized to establish the sulfur bridge.
- Phenothiazine and its various derivatives can be converted to compounds of Formula IV by contacting the phenothiazine compound containing the free NH group with a thio alcohol of the formula R 1 SR 13 OH where R 14 and R 13 are defined with respect to Formula IV.
- the thio alcohol may be obtained by the reaction of a mercaptan R 1 SH with an alkylene oxide under basic conditions.
- the thio alcohol may be obtained by reacting a terminal olefin with mercaptoethanol under free radical conditions.
- the reaction between the thio alcohol and the phenothiazine compound generally is conducted in the presence of an inert solvent such as toluene, benzene, etc.
- a strong acid catalyst such as sulfuric acid or para-toluene sulfonic acid at about 1 part to about 50 parts of catalyst per 1000 parts of phenothiazine is preferred.
- the reaction is conducted generally at reflux temperature with removal of water as it is formed. Conveniently, the reaction tempera ⁇ ture may be maintained between 80°C and 170 Q C.
- phenothiazine is placed in a one- liter, round bottom flask with 300 ml. of toluene. A nitrogen blanket is maintained in the reactor.
- To the mixture of phenothiazine and toluene is added 0.05 mole of sulfuric acid catalyst.
- the mixture is then heated to reflux temperature and 1.1 moles of n-dodecylthioethanol is added dropwise over a period of approximately 90 minutes. Water is continuously removed as it is formed in the reaction process.
- the reaction mixture is continuously stirred under reflux until substantially no further water is evolved.
- the reaction mixture is then allowed to cool to 90°C.
- the sulfuric acid catalyst is neutralized with sodium hydroxide.
- the solvent is then removed under a vacuum of 2 KPa at 110 ⁇ C. The residue is filtered giving a 95% yield of the desired product.
- the antioxidant (D) is a transition metal-containing composition.
- the transition metal-containing antioxidant is oil-soluble.
- the composi ⁇ tions generally contain at least one transition metal selected from titanium, manganese, cobalt, nickel, copper, and zinc, preferably manganese, copper, and zinc, more preferably copper.
- the metals may be in the form of nitrates, nitrites, halides, oxyhalides, carboxylates, borates, phosphates, phosphites, sulfates, sulfites, carbonates and oxides.
- the transition metal-containing composition is generally in the form of a metal-organic compound complex.
- the organic compounds include carboxylic acids and esters, mono- and dithiophosphoric acids, dithio- carbamic acids and dispersants.
- the transition metal-containing compositions contain at least about 5 carbon atoms to render the compositions oil-soluble.
- the organic compound is a carboxylic acid.
- the carboxylic acid may be a mono- or polycarboxylic acid containing from 1 to about 10 carboxyl ⁇ ic groups and 2 to about 75 carbon atoms, preferably 2 to about 30, more preferably 2 to about 24.
- monocarboxylic acids include 2-ethylhexanoic acid, octanoic acid, decanoic acid, oleic acid, linoleic acid, stearic acid and gluconic acid.
- Examples of polycarboxylic acids include succinic, malonic, citraconic acids as well as substituted versions of these acids.
- the carboxylic acid may be one of the above-described hydrocarbyl-substituted carboxylic acylating agents.
- the organic compound is a mono- or dithiophosphoric acid.
- the dithiophosphoric acids may be any of the above-described phosphoric acids (see dihydrocarbyl dithiophosphate) .
- a monothiophosphoric acid is prepared by treating a dithiophosphoric acid with steam or water.
- the organic compound is a mono- or dithiocarbamic acid.
- Mono- or dithiocarbamic acid is prepared by reacting carbon disulfide or carbon oxy- sulfide with a primary or secondary amine.
- the amines may be any of the amines described above.
- the organic compound may be any of the phenols, aromatic amines, or dispersants described above.
- the transition metal-containing composition is a lower carboxylic acid- transition metal-dispersant complex.
- the lower alkyl carboxylic acids contain from 1 to about 7 carbon atoms and include formic acid, acetic, propionic, butanoic, 2-ethyl- hexanoic, benzoic acid, adn salicylic acid.
- the dispersant may be any of the dispersants described above, preferably the dispersant is a nitrogen-containing carboxylic disper ⁇ sant.
- the transition metal complex is prepared by blending a lower carboxylic acid salt of a transition metal with a dispersant at a temperature from about 25°C up to the decomposition temperature of the reaction mixture, usually from about 25°C up to about 100°C.
- a solvent such as a xylene, toluene, naphtha or mineral oil may be used.
- Example D-ll The metal complex is obtained by heating at 160°C for 32 hours 50 parts of copper diacetate monohydrate, 283 parts of 100 neutral mineral oil, 250 milliliters of xylene and 507 parts of an acylated nitrogen intermediate prepared by reacting 4,392 parts of a polybutene-substituted succin ⁇ ic anhydride (prepared by the reaction of a chlorinated polybutene having a number average molecular weight of 1000 and a chlorine content of 4.3% and 20% molar excess of maleic anhydride) with 540 parts of an alkylene amine polyamine mixture of 3 parts by weight of triethylene tetramine and 1 part by weight of diethylene triamine, and 3240 parts of 100 neutral mineral oil at 130°C-240°C for 3.5 hours.
- the reaction is vacuum stripped to 110°C and 5 millimeters of mercury.
- the reaction is filtered through diatomaceous earth to yield a filtrate which has 59% by weight oil, 0.3% by weight copper and 1.2% by weight nitrogen.
- the lubricating compositions of the present invention also contain at least one magnesium overbased sulfonic, carboxylic, or phosphorus acid or derivative thereof, preferably sulfonic acid.
- the acids have been described above.
- the magnesium salts have th same metal ratios as described for alkali metal salt.
- the magnesium salts are prepared by a manne similar to the alkali metal salts except basic magnesiu compounds, preferably magnesium oxide or magnesium hydrox ide, are used instead of basic alkali metal compounds.
- reaction mixture comprising 906 grams (1. equivalents) of an oil solution of alkylphenylsulfonic aci having (average molecular weight 450) , 564 grams of minera oil, 600 grams of toluene, 95.7 grams of magnesium oxid
- the carbonation is stopped and the reactio product stripped by heating to 165°C at a pressure of 20 mm. (Hg.).
- the stripped product is filtered.
- the fil- trate is an oil-solution of the desired basic magnesiu sulfonate having a metal ratio of about 3.
- a reaction mixture comprising 135 parts mineral oil (all "parts" are parts by weight unless otherwise indicated), 330 parts xylene, 200 parts (0.235 equivalent) of a mineral oil solution of an alkylphenylsulfonic acid
- the carbonated mixture is cooled to about 60°-65°C and 208 parts xylene, 60 parts magnesium oxide, 83 parts methanol and 62 parts water are added thereto. Carbonation is resumed at a rate of 15 parts per hour for two hours at the methanol reflux temperature. The carbon dioxide addition rate is reduced to 7 parts per hour and the methanol is removed by raising the temperature to about 95°C over a three hour period. An additional 41.5 parts of water are added and carbonation is continued at 7 parts per hour at a temperature of about 90°-95°C for 3.5 hours. The carbonated mass is then heated to about 150°-160°C over a 3.5 hour period and then further stripped by reducing the pressure to 20 mm. (Hg.) at this temperature. The carbon ⁇ ated reaction product is then filtered. The filtrate is an oil-solution of the desired basic magnesium salt character ⁇ ized by a metal ratio of 20. Lubricating Compositions
- Lubricating compositions of the present invention are effective in lubricating compression and spark-ignited engines, preferably spark-ignited.
- the compositions of the present invention provide effective protection to engines under operating conditions.
- the lubricating compositions comprise a major amount of an oil of lubricating viscosity and (A) at least one alkali metal overbased salt of a sulfonic, carboxylic or phosphorus acid or derivatives thereof, (B) at least one dispersant, (C) at least one metal dihydrocarbyl dithiophosphate, (D) at least one antioxidant and (E) at least one magnesium overbased metal salt of a sulfonic, carboxylic or phosphorus acid or derivative thereof.
- the lubricating compositions and methods of this invention employ an oil of lubricating viscosity, including natural or synthetic lubricating oils and mixtures thereof.
- Natural oils include animal oils, vegetable oils, mineral lubricating oils, solvent or acid treated mineral oils, and oils derived from coal or shale.
- Synthetic lubricating oils include hydrocarbon oils, halo-substituted hydrocarbon oils, alkylene oxide polymers, esters of dicarboxylic acids and polyols, esters of phosphorus-containing acids, poly- meric tetrahydrofurans and silcon-based oils.
- oils of lubricating viscosity are described in U.S. Patent 4,326,972 and European Patent Publication 107,282, both herein incorpo ⁇ rated by reference for their disclosures relating to lubricating oils.
- a basic, brief description of lubricant base oils appears in an article by D. V. Brock. "Lubricant Oils", Lubricant Engineering, volume 43, pages 184-185, March, 1987. This article is herein incorporated by reference for its disclosures relating to lubricating oils.
- a description of oils of lubricating viscosity occurs in U.S. Patent 4,582,618 (column 2, line 37 through column 3, line 63, inclusive) , herein incorporated by reference for its disclosure to oils of lubricating viscosity.
- the above components are generally present in amounts to provide effective protection to the engines.
- the alkal metal salt (A) is present in an amount to provide at least about 0.0019 equivalent of alkali metal per 100 grams of lubricating composition, preferably about 0.0025, more preferably about 0.0031, and still more preferably about 0.0037.
- the alkali metal salt (A) is present in an amount to provide up to about 0.0075 equiva ⁇ lent of alkali metal per 100 grams of lubricating composi ⁇ tion, preferably up to about 0.0050.
- the alkali metal salt (A) is present in an amount from about 0.15% by weight of the composition, preferably about 0.20%, more preferably about 0.25%, still more preferably about 0.30%. Generally, the alkali metal salt (A) is present in an amount up to about 0.60% by weight of the composition, preferably up to about 0.40%.
- the disper- sant (B) is generally present in an amount of at least about 1.60%, preferably about 1.8%, more preferably about 2.25% by weight of the composition.
- the dispersant (B) is generally present in an amount up to about 5.0%, preferably about 4.0%, more preferably 3.5% by weight of the composi- tion.
- the metal hydrocarbyl dithiophosphate (C) is gener ⁇ ally present in an amount from about 0.1%, preferably from about 0.5%, more preferably from about 0.7% up to about 2.0%, preferably up to about 1.75%, more preferably up to about 1.5% by weight of the composition.
- the antioxidant (D) is generally present in an amount from about 0.01%, preferably from about 0.03% up to about 2.0%, preferably up to about 1.0% by weight of the composition. In another embodiment, the antioxidant is present in an amount to provide from about 50, preferably from about 100, more preferably from about 125 up to about 2000, generally up to about 1000, preferably up to about 500, preferably up to about 200, more preferably up to about 150 ppm transition metal to the lubricating composition.
- the magnesium overbased sulfonate (E) is present in an amount from at least about 0.15%, preferably from about 0.20%, more preferably from about 0.25% by weight of the composition.
- the magnesium sulfonate (E) is generally present in an amount up to about 2.0%, preferably up to about 1.5%, more preferably up to about 1.0% by weight of the composition.
- the lubricating compositions of the present invention are free of calcium overbased sulfonate.
- the use of the term "free of” refers to compositions which are substantially free of calcium overbased sulfonate.
- the metal ratio of calcium overbased sulfonates is typically 1.5 to 40.
- compositions are free of calcium overbased phenates, including calcium overbased alkylene-coupled phenates and calcium overbased sulfur-coupled phenates.
- the lubricating compositions of the present invention generally contain less than about 0.08% by weight calcium, preferably less than about 0.07%, more preferably less than about 0.05% by weight calcium metal. Some calcium may be present in some of the addi ⁇ tives of the present invention as a contaminant. These small quantities of calcium are acceptable provided they do not adversely affect the compositions of the present invention.
- the lubricating compositions of the present invention may be used, by themselves or in combination with any other known additive which includes, but is not limited to anti-wear agents, extreme pressure agents, emulsifiers, demulsifiers, friction modifiers, anti-rust agents, corro ⁇ sion inhibitors, viscosity improvers, pour point depres ⁇ sants, dyes, and foam inhibitors. These additives may be present in various amounts depending on the needs of the final product.
- Corrosion inhibitors, extreme pressure and anti- wear agents include but are not limited to metal salts of a phosphorus acid, chlorinated aliphatic hydrocarbons; phosphorus esters including dihydrocarbyl and trihydrocar- byl phosphites; boron-containing compounds including borate esters; dimercaptothiadiazole derivatives; benzotriazole derivatives; amino-mercaptothiadiazole derivatives; and molybdenum compounds.
- Viscosity improvers include but are not limited to polyisobutenes, polymethyacrylate acid esters, poly- acrylate acid esters, diene polymers, polyalkyl styrenes, alkenyl aryl conjugated diene copolymers (preferably styrene-maleic anyhydride copolymer esters) , polyolefins and multifunctional viscosity improvers.
- Anti-foam agents used to reduce or prevent the formation of stable foam include silicones or organic polymers. Examples of these and additional anti-foam compositions are described in "Foam Control Agents", by Henry T. Kerner (Noyes Data Corporation, 1976) , pages 125- 162.
- the lubricating compositions of the present invention are prepared by blending components (A)-(D) above with or without additional optional additives in an oil of lubricating viscosity. Blending is accomplished by mixing
- the ingredients from room temperature up to the decomposition temperature of the mixture or individual components.
- the ingredients are blended at a temperature from about 25°C up to about 250°C, preferably up to about 200°C, more preferably up to about
- Lubricating oil compositions of the present invention exhibit a reduced tendency to deteriorate under conditions of use and thereby reduce wear and the formation of such undesirable deposits as varnish, sludge, carbona ⁇ ceous materials and resinous materials which tend to adhere to the various engine parts and reduce the efficiency of the engines.
- Lubricating oils also can be formulated in accordance with this invention which result in improved fuel economy when used in the crankcase of a passenger automobile.
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Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US69017991A | 1991-04-19 | 1991-04-19 | |
US690179 | 1991-04-19 | ||
PCT/US1992/001574 WO1992018588A1 (en) | 1991-04-19 | 1992-02-27 | Lubricating compositions |
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EP0535217A1 true EP0535217A1 (de) | 1993-04-07 |
EP0535217B1 EP0535217B1 (de) | 1996-12-11 |
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EP (1) | EP0535217B1 (de) |
JP (1) | JPH05508186A (de) |
AT (1) | ATE146215T1 (de) |
AU (1) | AU657333B2 (de) |
BR (1) | BR9205241A (de) |
CA (1) | CA2085615A1 (de) |
DE (1) | DE69215819T2 (de) |
ES (1) | ES2097912T3 (de) |
FI (1) | FI925775A (de) |
MX (1) | MXPA92001751A (de) |
NO (1) | NO924902L (de) |
WO (1) | WO1992018588A1 (de) |
Cited By (1)
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AU657333B2 (en) * | 1991-04-19 | 1995-03-09 | Lubrizol Corporation, The | Lubricating compositions |
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US5202036A (en) * | 1990-06-28 | 1993-04-13 | The Lubrizol Corporation | Diesel lubricants and methods |
US5562864A (en) * | 1991-04-19 | 1996-10-08 | The Lubrizol Corporation | Lubricating compositions and concentrates |
US5614480A (en) * | 1991-04-19 | 1997-03-25 | The Lubrizol Corporation | Lubricating compositions and concentrates |
JPH05186789A (ja) * | 1992-01-09 | 1993-07-27 | Tonen Corp | 潤滑油組成物 |
JPH07500375A (ja) * | 1992-05-15 | 1995-01-12 | ザ ルブリゾル コーポレイション | 潤滑組成物および濃縮物 |
AU2891592A (en) * | 1992-05-15 | 1993-12-13 | Lubrizol Corporation, The | Lubricating compositions and concentrates |
CA2186286C (en) * | 1994-04-28 | 2004-01-27 | Ricardo Alfredo Bloch | Crankcase lubricant for modern heavy duty diesel and gasoline fueled engines |
US6004910A (en) * | 1994-04-28 | 1999-12-21 | Exxon Chemical Patents Inc. | Crankcase lubricant for modern heavy duty diesel and gasoline fueled engines |
US6235688B1 (en) | 1996-05-14 | 2001-05-22 | Chevron Chemical Company Llc | Detergent containing lithium metal having improved dispersancy and deposit control |
US5719107A (en) * | 1996-08-09 | 1998-02-17 | Exxon Chemical Patents Inc | Crankcase lubricant for heavy duty diesel oil |
CN109679728B (zh) * | 2017-10-18 | 2022-06-24 | 中国石油化工股份有限公司 | 汽油发动机润滑油组合物及其制备方法 |
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EP0323088A1 (de) * | 1987-12-29 | 1989-07-05 | Exxon Chemical Patents Inc. | Herstellung von überbasschem Magnesium-Sulfonat |
CA1336902C (en) * | 1988-02-26 | 1995-09-05 | Jacob Emert | Friction modified oleaginous concentrates of improved stability |
CA2030481C (en) * | 1990-06-20 | 1998-08-11 | William B. Chamberlin, Iii | Lubricating oil compositions for meoh-fueled diesel engines |
DE69114059T2 (de) * | 1990-06-29 | 1996-04-11 | Exxon Chemical Patents Inc | Schmierölzusätze. |
US5084197A (en) * | 1990-09-21 | 1992-01-28 | The Lubrizol Corporation | Antiemulsion/antifoam agent for use in oils |
JPH05508186A (ja) * | 1991-04-19 | 1993-11-18 | ザ ルブリゾル コーポレイション | 潤滑組成物 |
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- 1992-02-27 EP EP92911546A patent/EP0535217B1/de not_active Expired - Lifetime
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- 1992-02-27 WO PCT/US1992/001574 patent/WO1992018588A1/en active IP Right Grant
- 1992-02-27 DE DE69215819T patent/DE69215819T2/de not_active Expired - Fee Related
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- 1992-12-18 FI FI925775A patent/FI925775A/fi not_active Application Discontinuation
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Publication number | Publication date |
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CA2085615A1 (en) | 1992-10-20 |
JPH05508186A (ja) | 1993-11-18 |
NO924902L (no) | 1993-02-10 |
ATE146215T1 (de) | 1996-12-15 |
ES2097912T3 (es) | 1997-04-16 |
AU1918992A (en) | 1992-11-17 |
BR9205241A (pt) | 1993-07-27 |
AU657333B2 (en) | 1995-03-09 |
WO1992018588A1 (en) | 1992-10-29 |
MXPA92001751A (es) | 2007-08-20 |
FI925775A0 (fi) | 1992-12-18 |
NO924902D0 (no) | 1992-12-17 |
EP0535217B1 (de) | 1996-12-11 |
FI925775A (fi) | 1992-12-18 |
DE69215819D1 (de) | 1997-01-23 |
DE69215819T2 (de) | 1997-07-10 |
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