CA1138413A - Lubricant composition - Google Patents
Lubricant compositionInfo
- Publication number
- CA1138413A CA1138413A CA000338310A CA338310A CA1138413A CA 1138413 A CA1138413 A CA 1138413A CA 000338310 A CA000338310 A CA 000338310A CA 338310 A CA338310 A CA 338310A CA 1138413 A CA1138413 A CA 1138413A
- Authority
- CA
- Canada
- Prior art keywords
- oxyethylated
- alkylphenol
- sorbitan
- composition
- oxy
- 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.)
- Expired
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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
- C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
- C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M145/24—Polyethers
- C10M145/26—Polyoxyalkylenes
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/027—Neutral salts thereof
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/144—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings containing hydroxy groups
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/146—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings having carboxyl groups bound to carbon atoms of six-membeered aromatic rings having a hydrocarbon substituent of thirty or more carbon atoms
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
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- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
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- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
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- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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- C10M2215/26—Amines
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- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/042—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds between the nitrogen-containing monomer and an aldehyde or ketone
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- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/043—Mannich bases
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- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/046—Polyamines, i.e. macromoleculars obtained by condensation of more than eleven amine monomers
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- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/06—Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/046—Overbasedsulfonic acid salts
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- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
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- C10M2219/088—Neutral salts
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- C10M2223/12—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of organic compounds, e.g. with PxSy, PxSyHal or PxOy
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- C10M2225/041—Hydrocarbon polymers
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- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- Chemical & Material Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
LUBRICANT COMPOSITION
Abstract Lubricating oil containing the combination of an oxyalkylated sorbitan tri-fatty acid ester and an oxy-ethylated alkylphenol has improved rust and corrosion-inhibiting properties.
Abstract Lubricating oil containing the combination of an oxyalkylated sorbitan tri-fatty acid ester and an oxy-ethylated alkylphenol has improved rust and corrosion-inhibiting properties.
Description
113~41~, LUBRICANT COMPOSITION
This invention relates to improved oil for crank-case service for internal combustion engines. Oils for such service contain various additives which serve differ-ent functions. Ashless dispersants are added to preventdeposition of engine sludge. Zinc dihydrocarbyldithio-phosphate is added to inhibit wear and provide antioxidant protection. Alkaline earth metal alkylbenzene or petroleum sulfonates function as high temperature detergents. Over-based alkaline earth metal sulfonates or salicylatesprovide both detergent action and an alkaline reserve to protect engine parts against corroslon. Use of certain surfactants for lubricating oil is discussed in U. S.
3,509,052 and U. S. 3,928,219. These include certain oxy-alkylated polyols, oxyalkylated ethylenediamine, nonyl-phenyl polyethylene glycol ethers and the like.
According to the present invention the rust and corrosion-inhibiting properties of lubricating oil are significantly improved by addition of the combination of an oxyalkylated sorbitan tri-fatty acid ester and an oxy-alkylated alkylphenol, especially an oxyethylated alkyl-phenol.
A preferred embodiment of the invention is a lubricating oil composition comprising a major amount of lubricating oil and a minor corrosion-inhibiting amount of the combination of (a) an oxyalkylated sorbitan triester of a fatty acid and (b) an oxyethylated C4-12 alkylphenol.
The oxyalkylated sorbitan triester can be made by esterifying one mole of sorbitan with about three moles of fatty acid. Preferred fatty acids contain about 10-20 carbon atoms. Examples of these are decanoic acid, lauric acid, palmitic acid, stearic acid, arachidic acid, tall . j :
' .
113841~
oil acids and the like. The most preferred fatty acid is oleic acid or mixtures of fatty acids containing substan-tial amounts of oleic acid.
Esterification can be conducted by known methods such as by heating a mixture of sorbitan and fatty acid to distill out water. A distillation aid such as xylene can be used. The reaction forms a mixture in which the principal component is the triester although minor amounts of di- and tetraester might form. These will not inter-fere with the effectiveness of the product.
The sorbitan triester is then reacted with analkylene oxide such as ethylene oxide, propylene oxide or butylene oxide. The alkylene oxide reacts mainly with the free hydroxyl group on the sorbitan triester to form an oxyalkylene chain with a terminal hydroxyl group. The length of the chain can be varied by adjusting the ratio of alkylene oxide to sorbitan tri-fatty acid ester. Some of the alkylene oxide can react with the ester bond to insert oxyalkylene units between the sorbitan and the fatty acid. Preferably, the reaction is conducted until about 4-50 moles of alkylene oxide are reacted per mole of sor-bitan tri-fatty acid ester. A preferredrange is about 10-30 moles of alkylene oxidé and a most preferred coadditive is formed when an average of about 20 moles of alkylene oxide react per mole of sorbitan tri-fatty acid ester.
The preferred alkylene oxide is ethylene oxide which forms a chain of repeating ethyleneoxy units.
Suitable oxyalkylated sorbitan tri-fatty acidesters are available commercially. Atsurf 2822 (registered trade-mark),a product of ICI United States, Inc., is an oxy-ethylated sorbitan trioleate containing an average of about 20 ethyleneoxy units per molecule. It is made by esteri-fying one mole of sorbitan with three moles of oleic acid followed by reaction with ethylene oxide. It is very effective in the present combination.
11384~3 The other required component in the combination is an ethoxylated alkylphenol. Preferably, the alkylphenol contains about 4-12 carbon atoms in the alkyl group. More prefereably, the alkyl group contains about 7-12 carbon atoms such as heptylphenol, 2-ethylhexylphenol, decylphenol and dodecylphenol. The most preferred alkylphenol is nonyl-phenol.
The coadditive is made by reacting alkylphenol with ethylene oxide until the desired number of ethylenoxy groups are reacted. Preferably there are an average of about 2-10 ethyleneoxy groups per each alkylphenol. More prefereably each alkylphenol has an average ofabout 3-5 ethyleneoxy groups per molecule. The most preferred additive is an ethoxylated nonylphenol containing an average of about 4 oxyethylene groups. Such additives are commercially avail-able. One such additive is marketed by Monsanto Company under the name "Sterox ND" (registered trademark).
The amount of each additive used need only be an amount such that the combination provide adequate corrosion and rust protection in an engine. A useful range is about 0.005-0.3 weight percent of the oxyalkylated sorbitan tri-ester and 0.01-0.5 weight percent of the oxyethylated alkylphenol.
Coadditives are included in the fully~formulated crankcase lubricant. Examples of these are dispersants such as the polyisobutyl succinimide of ethylenepolyamine and polyisobutylphenol Mannich condensates with formalde-hyde and ethylenepolyamine. Metal detergents such as calcium alkylbenzene sulfonate, magnesium petroleum sulfonate, calcium salicylates and calcium alkyphenate are convention-ally included.
Of special importance in preventing rust are the overbased metal detergents. These include overbased alka-line earth metal alkylbenzene sulfonates, ~etroleum sul-fonates, phenates, salicylates and the like. Examples ofthese are overbased calcium alkylbenzene sulfonate, a6 ~
11384~3 overbased calcium petroleum sulfonate, overbased magnesium alkylbenzene sulfonate, overbased calcium salicylate, over-based calcium alkylphenate, overbased magnesium alkyl-phenate sulfide and the like. Overbasing methods are well known. For example, alkylbenzene sulfonic acid having an equivalent weight of about 300-2,000 can be overbased by reaction with excess calcium oxide in the presence of water and methanol followed by carbon dioxide injection. The colloidal alkaline earth metal base in these additives serve to neutralize acids in blow-by gases formed in com-bustion.
Viscosity index improvers are generally added to improve viscosity property of the formulated oil. These include the polyalkylmethacrylate type and the olefin co-polymer type. Examples of the latter are ethylene/propyle~Rcopolymer, styrene/butadiene copolymer and the like.
Phosphosulfurized olefins can be added such as phosphosulfurized terpenes or phosphosulfurized polybutenes.
These may be further reacted by steam blowing or by neutral-ization with alkaline earth metal bases such as bariumoxide.
Phenolic antioxidants are frequently added to the oil compositions. Examples of these are 4,4'-methylenebis-(2,6-di-tert-butylphenol); 2,6-di-tert-butyl-4-dimethyl-aminomethylphenol; 4,4'-thiobis-(2,6-di-tert-butylphenol) and the like Zinc salts of dihycro-arbyldithiophosphoric acid are routinely added to provide both wear and antioxidant protection. A typical example is zinc di-(2-ethylhexyl)-dithiophosphate.
The following example illustrates the preparation ofa typical formulated oil suitable for use in an engine crankcase.
. .
113t~413 Example 1 In a blending vessel place 1,000 gallons 150 SUS
solvent refined mineral oil. To this add 100 gallons l-decene oligomer containing mainly trimers and tetramers.
Add sufficient zinc isobutylamylthiophosphate to provide 0.07 weight percent zinc. Add overbased (TBN 300) calcium alkylbenzene sulfonate in an amount to provide 0.15 weight percent calcium. Add 30 gallons of a poly-laurylmethacrylate VI improver. Add sufficient polyisobutyl succinimide of tetraethylene pentamine to provide 3 weight percent active dispersant. Add 0.03 weight percent Atsurf 2822 and 0.3 weight percent Sterox ND. Blend the oil until homogenous and package for distribution.
In many cases the additive combination of this in-vention is first packaged in an additive concentrate formu-lated for addition to lubricating oil. These concentrates contain conventional additives such as those listed above in addition to the oxyalkylated sorbitan triester and ethoxylated alkylphenol described herein. The various addi-tives are present in a proper ratio such that when a quantityof the concentrate is added to lubricating oil the various additives are all present in the proper concentration. The additive concentrate also contains mineral oil in order to maintain it in liquid form. The following example illustrates formulation of an additive concentrate formulated for addi-tion to lubricating oil to provide an effective crankcase lubricant Example 2 In a blending vessel place 1199.5 lbs.of 100 SUS
mineral oil, 784 lbs. of polyisobutyl succinimide of tetra-ethylene pentamine, 2352 lbs. of ethylene/propylene copoly-mer VI improver, 264.8 lbs. of zinc di-(2-ethylhexyl)dithio-phosphate, 245 lbs. of overbased calcium a~lkylbenzene sul-fonate (300 TBN), 5.88 lbs. of Atsurf 2822~and 58.8 lbs. of Sterox ND. Blend until homogenous and then package. The ~13841~
addition of 2450 lbs. of the above concentrate to 1,000 gallons of 150 SUS mineral oil will provide an effective crankcase lubricant.
Standard multi-cylinder Sequence IId tests were carried out in a fully formulated oil containing a commer-cial succinimide ashless dispersant, a zinc dialkyldithio-phosphate, a commercial viscosity index improver, a com-mercial 300 TBN overbased calcium alkylbenzene sulfonate and 0.3 weight percent Sterox ND and 0.03 weight percent Atsurf 2822. In this test a rust rating of 8.5 or above is a pass. The test was conducted using two different base oils. Ratings of 8.5 and 8.7 were obtained. Both oils passed.
This invention relates to improved oil for crank-case service for internal combustion engines. Oils for such service contain various additives which serve differ-ent functions. Ashless dispersants are added to preventdeposition of engine sludge. Zinc dihydrocarbyldithio-phosphate is added to inhibit wear and provide antioxidant protection. Alkaline earth metal alkylbenzene or petroleum sulfonates function as high temperature detergents. Over-based alkaline earth metal sulfonates or salicylatesprovide both detergent action and an alkaline reserve to protect engine parts against corroslon. Use of certain surfactants for lubricating oil is discussed in U. S.
3,509,052 and U. S. 3,928,219. These include certain oxy-alkylated polyols, oxyalkylated ethylenediamine, nonyl-phenyl polyethylene glycol ethers and the like.
According to the present invention the rust and corrosion-inhibiting properties of lubricating oil are significantly improved by addition of the combination of an oxyalkylated sorbitan tri-fatty acid ester and an oxy-alkylated alkylphenol, especially an oxyethylated alkyl-phenol.
A preferred embodiment of the invention is a lubricating oil composition comprising a major amount of lubricating oil and a minor corrosion-inhibiting amount of the combination of (a) an oxyalkylated sorbitan triester of a fatty acid and (b) an oxyethylated C4-12 alkylphenol.
The oxyalkylated sorbitan triester can be made by esterifying one mole of sorbitan with about three moles of fatty acid. Preferred fatty acids contain about 10-20 carbon atoms. Examples of these are decanoic acid, lauric acid, palmitic acid, stearic acid, arachidic acid, tall . j :
' .
113841~
oil acids and the like. The most preferred fatty acid is oleic acid or mixtures of fatty acids containing substan-tial amounts of oleic acid.
Esterification can be conducted by known methods such as by heating a mixture of sorbitan and fatty acid to distill out water. A distillation aid such as xylene can be used. The reaction forms a mixture in which the principal component is the triester although minor amounts of di- and tetraester might form. These will not inter-fere with the effectiveness of the product.
The sorbitan triester is then reacted with analkylene oxide such as ethylene oxide, propylene oxide or butylene oxide. The alkylene oxide reacts mainly with the free hydroxyl group on the sorbitan triester to form an oxyalkylene chain with a terminal hydroxyl group. The length of the chain can be varied by adjusting the ratio of alkylene oxide to sorbitan tri-fatty acid ester. Some of the alkylene oxide can react with the ester bond to insert oxyalkylene units between the sorbitan and the fatty acid. Preferably, the reaction is conducted until about 4-50 moles of alkylene oxide are reacted per mole of sor-bitan tri-fatty acid ester. A preferredrange is about 10-30 moles of alkylene oxidé and a most preferred coadditive is formed when an average of about 20 moles of alkylene oxide react per mole of sorbitan tri-fatty acid ester.
The preferred alkylene oxide is ethylene oxide which forms a chain of repeating ethyleneoxy units.
Suitable oxyalkylated sorbitan tri-fatty acidesters are available commercially. Atsurf 2822 (registered trade-mark),a product of ICI United States, Inc., is an oxy-ethylated sorbitan trioleate containing an average of about 20 ethyleneoxy units per molecule. It is made by esteri-fying one mole of sorbitan with three moles of oleic acid followed by reaction with ethylene oxide. It is very effective in the present combination.
11384~3 The other required component in the combination is an ethoxylated alkylphenol. Preferably, the alkylphenol contains about 4-12 carbon atoms in the alkyl group. More prefereably, the alkyl group contains about 7-12 carbon atoms such as heptylphenol, 2-ethylhexylphenol, decylphenol and dodecylphenol. The most preferred alkylphenol is nonyl-phenol.
The coadditive is made by reacting alkylphenol with ethylene oxide until the desired number of ethylenoxy groups are reacted. Preferably there are an average of about 2-10 ethyleneoxy groups per each alkylphenol. More prefereably each alkylphenol has an average ofabout 3-5 ethyleneoxy groups per molecule. The most preferred additive is an ethoxylated nonylphenol containing an average of about 4 oxyethylene groups. Such additives are commercially avail-able. One such additive is marketed by Monsanto Company under the name "Sterox ND" (registered trademark).
The amount of each additive used need only be an amount such that the combination provide adequate corrosion and rust protection in an engine. A useful range is about 0.005-0.3 weight percent of the oxyalkylated sorbitan tri-ester and 0.01-0.5 weight percent of the oxyethylated alkylphenol.
Coadditives are included in the fully~formulated crankcase lubricant. Examples of these are dispersants such as the polyisobutyl succinimide of ethylenepolyamine and polyisobutylphenol Mannich condensates with formalde-hyde and ethylenepolyamine. Metal detergents such as calcium alkylbenzene sulfonate, magnesium petroleum sulfonate, calcium salicylates and calcium alkyphenate are convention-ally included.
Of special importance in preventing rust are the overbased metal detergents. These include overbased alka-line earth metal alkylbenzene sulfonates, ~etroleum sul-fonates, phenates, salicylates and the like. Examples ofthese are overbased calcium alkylbenzene sulfonate, a6 ~
11384~3 overbased calcium petroleum sulfonate, overbased magnesium alkylbenzene sulfonate, overbased calcium salicylate, over-based calcium alkylphenate, overbased magnesium alkyl-phenate sulfide and the like. Overbasing methods are well known. For example, alkylbenzene sulfonic acid having an equivalent weight of about 300-2,000 can be overbased by reaction with excess calcium oxide in the presence of water and methanol followed by carbon dioxide injection. The colloidal alkaline earth metal base in these additives serve to neutralize acids in blow-by gases formed in com-bustion.
Viscosity index improvers are generally added to improve viscosity property of the formulated oil. These include the polyalkylmethacrylate type and the olefin co-polymer type. Examples of the latter are ethylene/propyle~Rcopolymer, styrene/butadiene copolymer and the like.
Phosphosulfurized olefins can be added such as phosphosulfurized terpenes or phosphosulfurized polybutenes.
These may be further reacted by steam blowing or by neutral-ization with alkaline earth metal bases such as bariumoxide.
Phenolic antioxidants are frequently added to the oil compositions. Examples of these are 4,4'-methylenebis-(2,6-di-tert-butylphenol); 2,6-di-tert-butyl-4-dimethyl-aminomethylphenol; 4,4'-thiobis-(2,6-di-tert-butylphenol) and the like Zinc salts of dihycro-arbyldithiophosphoric acid are routinely added to provide both wear and antioxidant protection. A typical example is zinc di-(2-ethylhexyl)-dithiophosphate.
The following example illustrates the preparation ofa typical formulated oil suitable for use in an engine crankcase.
. .
113t~413 Example 1 In a blending vessel place 1,000 gallons 150 SUS
solvent refined mineral oil. To this add 100 gallons l-decene oligomer containing mainly trimers and tetramers.
Add sufficient zinc isobutylamylthiophosphate to provide 0.07 weight percent zinc. Add overbased (TBN 300) calcium alkylbenzene sulfonate in an amount to provide 0.15 weight percent calcium. Add 30 gallons of a poly-laurylmethacrylate VI improver. Add sufficient polyisobutyl succinimide of tetraethylene pentamine to provide 3 weight percent active dispersant. Add 0.03 weight percent Atsurf 2822 and 0.3 weight percent Sterox ND. Blend the oil until homogenous and package for distribution.
In many cases the additive combination of this in-vention is first packaged in an additive concentrate formu-lated for addition to lubricating oil. These concentrates contain conventional additives such as those listed above in addition to the oxyalkylated sorbitan triester and ethoxylated alkylphenol described herein. The various addi-tives are present in a proper ratio such that when a quantityof the concentrate is added to lubricating oil the various additives are all present in the proper concentration. The additive concentrate also contains mineral oil in order to maintain it in liquid form. The following example illustrates formulation of an additive concentrate formulated for addi-tion to lubricating oil to provide an effective crankcase lubricant Example 2 In a blending vessel place 1199.5 lbs.of 100 SUS
mineral oil, 784 lbs. of polyisobutyl succinimide of tetra-ethylene pentamine, 2352 lbs. of ethylene/propylene copoly-mer VI improver, 264.8 lbs. of zinc di-(2-ethylhexyl)dithio-phosphate, 245 lbs. of overbased calcium a~lkylbenzene sul-fonate (300 TBN), 5.88 lbs. of Atsurf 2822~and 58.8 lbs. of Sterox ND. Blend until homogenous and then package. The ~13841~
addition of 2450 lbs. of the above concentrate to 1,000 gallons of 150 SUS mineral oil will provide an effective crankcase lubricant.
Standard multi-cylinder Sequence IId tests were carried out in a fully formulated oil containing a commer-cial succinimide ashless dispersant, a zinc dialkyldithio-phosphate, a commercial viscosity index improver, a com-mercial 300 TBN overbased calcium alkylbenzene sulfonate and 0.3 weight percent Sterox ND and 0.03 weight percent Atsurf 2822. In this test a rust rating of 8.5 or above is a pass. The test was conducted using two different base oils. Ratings of 8.5 and 8.7 were obtained. Both oils passed.
Claims (10)
1. A lubricating oil composition comprising a major amount of lubricating oil and a minor corrosion-inhibiting amount of the combination of (a) an oxyalkylated sorbitan triester of a fatty acid and (b) an oxyethylated C4-12 alkylphenol.
2. A composition of Claim 1 wherein said oxy-alkylated sorbitan triester is an oxyethylated sorbitan trioleate.
3. A composition of Claim 2 wherein said oxyethyl-ated alkylphenol contains about 3-5 ethyleneoxy units.
4. A composition of Claim 2 wherein said oxyethyl-ated sorbitan trioleate contains about 4-50 ethyleneoxy units.
5. A composition of Claim 4 wherein said oxy-ethylated sorbitan trioleate contains about 20 ethyleneoxy units.
6. A composition of Claim 5 wherein said oxy-ethylated alkylphenol is an oxyethylated nonylphenol con-taining an average of about 4 ethyleneoxy units.
7. In an additive concentrate formulated for addi-tion to engine lubricating oil said concentrate containing an overbased alkaline earth metal detergent and an ashless dispersant, the improvement of including in said concen-tratea corrosion-inhibiting amount of the combination of (a) an oxyalkylated sorbitan triester of a fatty acid and (b) an oxyethylated C4-12 alkylphenol.
8. An additive concentrate of Claim 7 wherein said oxyalkylated sorbitan triester is an oxyethylated sorbitan trioleate.
9. An additive concentrate of Claim 8 wherein said oxyethylated sorbitan trioleate contains about 20 ethylene-oxy units.
10. An additive concentrate of Claim 9 wherein said oxyethylated alkylphenol is an oxyethylated nonylphenol containing an average of about 4 ethyleneoxy units.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US96076478A | 1978-11-15 | 1978-11-15 | |
US960,764 | 1978-11-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1138413A true CA1138413A (en) | 1982-12-28 |
Family
ID=25503593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000338310A Expired CA1138413A (en) | 1978-11-15 | 1979-10-24 | Lubricant composition |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0011497B1 (en) |
JP (1) | JPS5569695A (en) |
CA (1) | CA1138413A (en) |
DE (1) | DE2964853D1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4278555A (en) * | 1978-11-15 | 1981-07-14 | Ethyl Corporation | Lubricant composition |
GB2065148A (en) * | 1979-12-14 | 1981-06-24 | Cooper & Co Ltd Edwin | Lubricating composition |
JP2544560B2 (en) * | 1992-01-22 | 1996-10-16 | エヌティエヌ株式会社 | Grease composition for bearing encapsulation |
ES2160892T3 (en) * | 1996-05-30 | 2001-11-16 | Nalco Chemical Co | USE OF A TENSIOACTIVE MIX TO INHIBIT CORROSION. |
US6136760A (en) * | 1999-09-21 | 2000-10-24 | Exxon Research And Engineering Company | Reducing low temperature scanning brookfield gel index value in engine oils (LAW798) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2968621A (en) * | 1955-06-28 | 1961-01-17 | Sinclair Refining Co | Acid-tolerating soluble oil composition |
US2921027A (en) * | 1957-07-26 | 1960-01-12 | Pure Oil Co | Anti-rust lubricating oil |
US3872048A (en) * | 1970-09-28 | 1975-03-18 | Us Navy | Hydraulic and lubricating oil composition |
GB1501868A (en) * | 1974-05-30 | 1978-02-22 | Cooper Ltd Ethyl | Corrosion inhibitors |
CA1083756A (en) * | 1975-08-07 | 1980-08-19 | George P. Koch | Prevention of water staining of aluminum |
-
1979
- 1979-10-24 CA CA000338310A patent/CA1138413A/en not_active Expired
- 1979-11-14 JP JP14757979A patent/JPS5569695A/en active Pending
- 1979-11-15 EP EP79302596A patent/EP0011497B1/en not_active Expired
- 1979-11-15 DE DE7979302596T patent/DE2964853D1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5569695A (en) | 1980-05-26 |
EP0011497B1 (en) | 1983-02-16 |
EP0011497A1 (en) | 1980-05-28 |
DE2964853D1 (en) | 1983-03-24 |
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