EP4200387A1 - Dieselmotorschmierzusammensetzungen und verfahren zur verwendung davon - Google Patents

Dieselmotorschmierzusammensetzungen und verfahren zur verwendung davon

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Publication number
EP4200387A1
EP4200387A1 EP21801682.2A EP21801682A EP4200387A1 EP 4200387 A1 EP4200387 A1 EP 4200387A1 EP 21801682 A EP21801682 A EP 21801682A EP 4200387 A1 EP4200387 A1 EP 4200387A1
Authority
EP
European Patent Office
Prior art keywords
composition
pib
succinimide dispersant
lubricating
alkaline earth
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.)
Pending
Application number
EP21801682.2A
Other languages
English (en)
French (fr)
Inventor
Mary Galic Raguz
Thomas Derevjanik
Alexandra Mayhew
John G. Loop
Paul R. VINCENT
Binbin Guo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lubrizol Corp
Original Assignee
Lubrizol Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lubrizol Corp filed Critical Lubrizol Corp
Publication of EP4200387A1 publication Critical patent/EP4200387A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
    • 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
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/22—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts
    • C10M2205/223—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts used as base material
    • 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
    • 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
    • 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
    • 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
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/28—Amides; Imides
    • 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
    • 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
    • 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
    • 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
    • C10M2219/046—Overbasedsulfonic acid salts
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/54—Fuel economy
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines

Definitions

  • the instant disclosure provides for diesel engine lubricating compositions and methods of lubricating a diesel engine by supplying the engine with a lubricating composition as disclosed herein.
  • the lubricating compositions disclosed herein may be used in diesels engines including, in particular, heavy-duty diesel engines to improve one or more of fuel economy and wear protection.
  • Lubricating oil compositions are used for the smooth operation of internal combustion engines.
  • the engine oils for internal combustion engines in particular serve to (i) lubricate various sliding interfaces between the piston ring and cylinder liner, in bearings of the crank shaft and the connecting rod, and in the valve driving mechanism including cams and valve lifters, (ii) cool the engine, (iii) clean and disperse the combustion products and (iv) prevent corrosion and consequent rust formation.
  • the stringent requirements for high performance engines in recent years has meant greater demand from lubricants used in such engines.
  • the present disclosure relates to diesel engine lubricating compositions for an internal combustion engine (typically a compression ignited engine) to have at least one of reduced soot, improved fuel economy, reduced deposit formation, reduced wear and improved cleanliness.
  • an internal combustion engine typically a compression ignited engine
  • the lubricating compositions include an oil of lubricating viscosity having greater than 50 weight percent (sometimes referred to as “wt. %”) of a Group III base oil, Group IV base oil, Group V base oil, or mixtures thereof.
  • compositions further include a first PIB succinimide dispersant derived from an 1800 to 2500 Mn PIB and a second PIB succinimide dispersant derived from a PIB with an Mn less than 1600, provided that at least one of the first PIB succinimide dispersant and the second PIB succinimide dispersant is boron-free; an alkaline earth metal salicylate, such as a calcium salicylate, detergent; an alkaline earth metal sulfonate, where the alkaline earth metal sulfonate is present to deliver from 0.1 wt % to 1.2 wt % of alkaline earth metal soap to the composition; a phosphorus antiwear agent present in an amount to deliver 300 to 900 ppm phosphorus to the lubricating composition.
  • a first PIB succinimide dispersant derived from an 1800 to 2500 Mn PIB and a second PIB succinimide dispersant derived from
  • the lubricating compositions can have a sulfated ash of between 0.3 to 1.1 wt %; a kinematic viscosity at 100°C of less than 8.3 cSt; a total alkaline earth metal soap of from 0.6 wt % to 2.1 wt %; and a HTHS measured according to ASTM D4683 of less than 2.7 mPa s.
  • the present disclosure provides for diesel engine lubricating compositions and methods for using the same.
  • the lubricating composition includes an oil of lubricating viscosity having greater than 50 weight percent of a Group III base oil, a Group IV base oil, a Group V base oil, or mixtures thereof; a first PIB succinimide dispersant derived from an 1800 to 2500 Mn PIB; a second PIB succinimide dispersant derived from a PIB with an Mn less than 1600, where at least one of the first PIB succinimide dispersant and the second PIB succinimide dispersant is boron- free; a alkaline earth metal salicylate detergent; an alkaline earth metal sulfonate detergent present in an amount to deliver 0.1 wt % to 1.2 wt % of alkaline earth metal soap to the lubricating composition; and a phosphorus antiwear agent present in an amount to deliver 300 to 900 ppm phosphorous to
  • the lubricating compositions disclosed herein further include a total sulfated ash of between 0.3 to 0.9 wt % or 0.3 to 1.1 wt. %, a total alkaline earth metal soap content of from 0.6 wt % to 2.1 wt %, and an HTHS as measured according to ASTM D4683 of less than 2.7 mPa s.
  • the lubricating compositions disclosed herein comprise an oil of lubricating viscosity.
  • oils include natural and synthetic oils, oil derived from hydrocracking, hydrogenation, and hydrofinishing, unrefined, refined, re-refined oils or mixtures thereof.
  • a more detailed description of unrefined, refined and re-refined oils is provided in International Publication W02008/147704, paragraphs [0054] to [0056] (a similar disclosure is provided in US Patent Application 2010/197536, see [0072] to [0073]).
  • Synthetic oils may also be produced by Fischer-Tropsch reactions and typically may be hydroisomerized Fischer-Tropsch hydrocarbons or waxes. In one embodiment, oils may be prepared by a Fischer-Tropsch gas-to-liquid synthetic procedure as well as other gas-to-liquid oils.
  • Oils of lubricating viscosity may also be defined as specified in April 2008 version of "Appendix E - API Base Oil Interchangeability Guidelines for Passenger Car Motor Oils and Diesel Engine Oils", section 1.3 Sub-heading 1.3. "Base Stock Categories”. The API Guidelines are also summarized in US Patent US 7,285,516 (see column 11, line 64 to column 12, line 10).
  • Group IV base oils also known as polyalphaolefins or PAO
  • PAOs are known in the art and are prepared by oligomerization or polymerization of linear alpha olefins.
  • PAOs are characteristically water white oils with superior low temperature viscosity properties (as measured, as well as high viscosity index.
  • Typical PAOs suitable for use in internal combustion engines include polyalphaolefins with a kinematic viscosity of 3 to 10 m 2 /s, such as PAO-4 and PAO-6, i.e. approximately 4 m 2 /s and 6 m 2 /s respectively.
  • Ester base fluids include esters of monocarboxylic acids with monohydric alcohols; diesters of diols with monocarboxylic acids and di-esters of dicarboxylic acids with monohydric alcohols; polyol esters of monocarboxylic acids and polyesters of monohydric alcohols with polycarboxylic acids; and mixtures thereof. Esters may be broadly grouped into two categories: synthetic and natural.
  • Synthetic esters may comprise esters of dicarboxylic acids (e.g., phthalic acid, succinic acid, alkyl succinic acids and alkenyl succinic acids, maleic acid, azelaic acid, suberic acid, sebacic acid, fumaric acid, adipic acid, linoleic acid dimer, malonic acid, alkyl malonic acids, and alkenyl malonic acids) with any of variety of monohydric alcohols (e.g., butyl alcohol, hexyl alcohol, dodecyl alcohol, 2- ethylhexyl alcohol, ethylene glycol, diethylene glycol monoether, and propylene glycol).
  • dicarboxylic acids e.g., phthalic acid, succinic acid, alkyl succinic acids and alkenyl succinic acids, maleic acid, azelaic acid, suberic acid, sebacic acid, fumaric acid, adipic acid, linole
  • esters include dibutyl adipate, di(2-ethylhexyl) sebacate, di-n-hexyl fumarate, dioctyl sebacate, diisooctyl azelate, diisodecyl azelate, dioctyl phthalate, didecyl phthalate, dieicosyl sebacate, the 2-ethylhexyl diester of linoleic acid dimer, and the complex ester formed by reacting one mole of sebacic acid with two moles of tetraethylene glycol and two moles of 2-ethylhexanoic acid.
  • esters include those made from C5 to C12 monocarboxylic acids and polyols and polyol ethers such as neopentyl glycol, trimethylolpropane, pentaerythritol, dipentaerythritol, and tripentaerythritol. Esters can also be monoesters of mono-carboxylic acids and monohydric alcohols.
  • Natural (or bio-derived) esters refer to materials derived from a renewable biological resource, organism, or entity, distinct from materials derived from petroleum or equivalent raw materials. Natural esters include fatty acid triglycerides, hydrolyzed or partially hydrolyzed triglycerides, or transesterified triglyceride esters, such as fatty acid methyl ester (or FAME). Suitable triglycerides include, but are not limited to, palm oil, soybean oil, sunflower oil, rapeseed oil, olive oil, linseed oil, and related materials. Other sources of triglycerides include, but are not limited to, algae, animal tallow, and zooplankton. Methods for producing biolubricants from natural triglycerides are described in, e.g., United States Patent Publication 2011/0009300A1.
  • the lubricant composition of the disclosure contains 0.1 to 10 weight percent of an ester base fluid, or 0.25 to 5 weight percent, or 0.1 to 2 weight percent of an ester base fluid. In one embodiment, the lubricating composition comprises no more than 5 weight percent of an ester base fluid, no more than 2.5 weight percent or no more than 1 weight percent of an ester base fluid. In one embodiment, the lubricant composition is free of or substantially free of, that is contains less than 0.2 weight percent, intentionally added ester base fluid.
  • the oil of lubricating viscosity may be a base oil including API Group I to IV oil, an ester or a synthetic oil, or mixtures thereof. In one embodiment the oil of lubricating viscosity may be an API Group II, Group III, Group IV oil, an ester or a synthetic oil, or mixtures thereof.
  • the oil of lubricating viscosity comprises at least 50 wt %, or at least 60 wt %, or at least 70 wt %, or at least 80 wt %, or at least 90 wt %, or at least 95 wt %, or at least 100 wt % of a Group III or a Group IV base oil, or a mixture of a Group III and Group IV base oil.
  • the amount of the oil of lubricating viscosity present is typically the balance remaining after subtracting from 100 wt % the sum of the amount of the additives of the disclosed compositions and the other performance additives.
  • the lubricating composition may be in the form of a concentrate and/or a fully formulated lubricant. If the lubricating compositions described herein (comprising the additives disclosed herein) is in the form of a concentrate which may be combined with additional oil to form, in whole or in part, a finished lubricant), the ratio of the of these additives to the oil of lubricating viscosity and/or to diluent oil include the ranges of 1 :99 to 99: 1 by weight, or 80:20 to 10:90 by weight.
  • the lubricating composition described herein include at least 50 wt %, or at least 60 wt %, or at least 70 wt %, or at least 80 wt % of an oil of lubricating viscosity.
  • the oil of lubricating viscosity can include a base oil having a kinematic viscosity measured at 100 °C of 2.4 m 2 /s to 6.4 m 2 /s.
  • the kinematic viscosity is from 3.8 m 2 /s to 5.0 m 2 /s or from 5.2 m 2 /s to 5.8 m 2 /s or from 6.0 m 2 /s to 6.5 m 2 /s. In other embodiments, the kinematic viscosity of the base oil is 4.5 m 2 /s or 4.3 m 2 /s or 4.2 m 2 /s.
  • the first polyisobutenyl succinimide and/or the second polyisobutenyl succinimide dispersants can each be prepared (or, as used herein “derived”) from a polyisobutylene (“PIB”) succinimide dispersant that is either a “conventional” PIB or a high vinylidene PIB.
  • PIB polyisobutylene
  • the difference between a conventional polyolefin and a high vinylidene polyolefin can be illustrated by reference to the production of PIB.
  • isobutylene is polymerized in the presence of AlCh to produce a mixture of polymers comprising predominantly tri substituted olefin (III) and tetrasubstituted olefin (IV) end groups, with only a very small amount (for instance, less than 20 percent) of chains containing a terminal vinylidene group (I).
  • isobutylene is polymerized in the presence of BF3 catalyst to produce a mixture of polymers comprising predominantly (for instance, at least 70 percent) terminal vinylidene groups, with smaller amounts of tetrasubstituted end groups and other structures.
  • the polyisobutylene-derived dispersant is a conventional polyisobutylene-derived dispersant.
  • the polyisobutylene-derived dispersant is a high or mid vinylidene succinimide dispersant.
  • the polyisobutylene-derived dispersant used herein is generally known in the art.
  • the polyisobutylene-derived acylating agent may be prepared/obtained/obtainable from reaction with maleic anhydride by an “ene” or “thermal” reaction, also referred to as direct alkylation.
  • ene or “thermal” reaction, also referred to as direct alkylation.
  • the “ene” reaction mechanism and general reaction conditions are summarized in “Maleic Anhydride”, pages, 147-149, Edited by B. C. Trivedi and B. C. Culbertson and Published by Plenum Press in 1982.
  • the polyisobutylene-derived dispersant prepared by a process that includes an “ene” reaction includes a dispersant having a carbocyclic ring present on less than 50 mole %, or 0 to less than 30 mole %, or 0 to less than 20 mole %, or 0 mole % of the dispersant molecules.
  • the “ene” reaction may have a reaction temperature of 180° C. to less than 300° C., or 200° C. to 250° C., or 200° C. to 220° C.
  • the polyisobutylene-derived acylating agent may also be obtained/obtainable from a chlorine-assisted process, often involving Diels-Alder chemistry, leading to formation of carbocyclic linkages.
  • the process is known to a person skilled in the art.
  • the chlorine-assisted process may produce an acylating agent having a carbocyclic ring present on 50 mol % or more, or 60 to 100 mol % of the molecules. Both the thermal and chlorine-assisted processes are described in greater detail in U.S. Pat. No. 7,615,521, columns 4-5 and preparative examples A and B.
  • the polyisobutylene-derived acylating agent may also be prepared/obtained/obtainable from a free radical process, wherein the acylating agent is reacted with polyisobutylene in the presence of a free radical initiator.
  • Free radical processes of this sort are well known in the art and may be carried out in the presence of an additional alpha-olefin.
  • the polyisobutylene-derived acylating agent can be obtained from reacting polyisobutylene with an acylating agent, i.e., an ethylenically unsaturated carbonyl compound, to form an acylated polyisobutylene which may be further functionalized with an amine or alcohol to form a suitable dispersant.
  • Suitable acylating agents include maleic anhydride or a reactive equivalent thereof (such as an acid or ester), i.e., succinic acid, and their reactive equivalents.
  • polyisobutylene may be reacted with maleic anhydride to form acylated product with a conversion between 1 and 2.
  • the monosuccan is reacted with an amine so that the intended product comprises a mixture wherein all of the anhydride present in the acylating agent has been converted to imide.
  • the polyisobutylene-derived dispersant may have a carbonyl to nitrogen ratio (CO:N ratio) of 5: 1 to 1 : 10, 2: 1 to 1 : 10, or 2: 1 to 1 :5, or 2: 1 to 1 :2.
  • the dispersant may have a CO:N ratio of 2: 1 to 1 : 10, or 2: 1 to 1 :5, or 2: 1 to 1 :2, or 1 : 1.4 to 1 :0.6.
  • Polyisobutylene succinimide dispersants of the instant disclosure may be prepared by reaction of the acylated PIB with a suitable amine compound.
  • suitable amines include one or more hydrocarbylamines, aminoalcohols, polyetheramines, or combinations thereof.
  • the hydrocarbyl amine component may comprise at least one aliphatic amine containing at least one amino group capable of condensing with said acyl group to provide a pendant group and at least one additional group comprising at least one nitrogen, oxygen, or sulfur atom.
  • Suitable aliphatic amines include polyethylene polyamines (such as tetraethylene pentamine (TEPA), triethylene tetra amine (TETA), pentaethylene hexamine (PEHA), and polyamine bottoms), N,N-dimethylaminopropylamine (DMAPA), N-(aminopropyl)morpholine, N,N-diIsostearylaminopropylamine, ethanolamine, and combinations thereof .
  • TEPA tetraethylene pentamine
  • TETA triethylene tetra amine
  • PEHA pentaethylene hexamine
  • DMAPA N,N-dimethylaminopropylamine
  • DMAPA N-(aminoprop
  • the polyetheramine compound may comprise an amine-terminated polyether compound.
  • Amine terminated polyether compounds may comprise units derived from ethylene oxides, propylene oxides, butylene oxides, or some combination thereof.
  • Suitable polyether compounds include Jeffamine® line of polyether amines available from Huntsman.
  • the first polyisobutylene succinimide dispersant may be prepared by a thermal direct alkylation process described herein.
  • the second polyisobutylene succinimide dispersant may be prepared by a thermal direct alkylation process described herein.
  • the polyisobutylene-derived dispersant as described herein can further be described as having a TBN.
  • the first polyisobutylene succinimide dispersant has a TBN of from 15 to 25.
  • the first polyisobutylene succinimide dispersant has a TBN of from 15 to 20.
  • the second polyisobutylene succinimide dispersant has a TBN of from 20 to 35.
  • the second polyisobutylene succinimide dispersant has a TBN of from 25 to 30.
  • the second polyisobutylene succinimide dispersant has a TBN of from 27 to 28.
  • the first polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 1720 to 2200. In another embodiment, the first polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 1800 to 2100. In one embodiment, the first polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 1850 to 2150.
  • the second polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 750 to 1600. In another embodiment, the second polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 1000 to 1600. In one embodiment, the second polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 1200 to 1600. In one embodiment, the second polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 800 to 1150. In another embodiment, the second polyisobutylene succinimide dispersant is derived from a PIB having a number average molecular weight ranging from 900 to 1100.
  • the first polyisobutylene succinimide dispersant may include a mixture of two or more dispersants where each of the two or more dispersants falls within the scope, including, without limitation, the PIB Mn, TBN, and treat rates of the first polyisobutylene succinimide dispersant as disclosed herein.
  • the first polyisobutylene succinimide dispersant may include a mixture of two dispersants where each of the two dispersants falls within the scope, including, without limitation, the PIB Mn, TBN, and treat rates of the first polyisobutylene succinimide dispersant as disclosed herein.
  • the first polyisobutylene-derived succinimide dispersant or the second polyisobutylene-derived succinimide dispersant as described herein may be posttreated by conventional methods including a reaction with boron compounds to generate the boron-containing polyisobutylene succinimide dispersant.
  • Suitable boron compounds that may be used to borate the polyisobutylene-derived dispersant include one or more of a variety of agents selected from the group consisting of the various forms of boric acid (including metaboric acid, HBO2, orthoboric acid, H3BO3, and tetraboric acid, H2B4O7), boric oxide, boron trioxide, and alkyl borates.
  • the borating agent is boric acid which may be used alone or in combination with other borating agents. Methods of preparing borated dispersants are known in the art.
  • the borated dispersant may be prepared in such a way that they contain 0.1 weight % to 2.5 weight% boron, or 0.1 weight % to 2.0 weight % boron or 0.2 to 1.5 weight % boron or 0.3 to 1.0 weight % boron.
  • either the borated first polyisobutylene succinimide dispersant or the borated second polyisobutylene succinimide dispersant is present in an amount to deliver from 25 ppm to 400 ppm, or 50 ppm to 200 ppm, or 75 ppm to 150 ppm, or 78 ppm to 100 ppm boron to the lubricating composition.
  • Metal overbased detergents otherwise referred to as overbased detergents, metal-containing overbased detergents or superbased salts, are characterized by a metal content in excess of that which would be necessary for neutralization according to the stoichiometry of the metal and the particular acidic organic compound, i.e. the substrate, reacted with the metal.
  • the overbased detergent may comprise one or more of sulfonates, salicylates, non-sulfur containing phenates, sulfur containing phenates, and mixtures thereof.
  • the amount of excess metal to substrate is commonly expressed in terms of metal ratio.
  • metal ratio is used in the prior art and herein to define the ratio of the total chemical equivalents of the metal in the overbased salt to the chemical equivalents of the metal in the salt which would be expected to result from the reaction between the hydrocarbyl substituted organic acid; the hydrocarbyl- substituted phenol or mixtures thereof to be overbased, and the basic metal compound according to the known chemical reactivity and the stoichiometry of the two reactants.
  • a normal or neutral salt i.e., soap
  • the metal ratio is one and, in an overbased salt, the metal ratio is greater than one, especially greater than 1.3.
  • the overbased metal detergent may have a metal ratio of 5 to 30, or a metal ratio of 7 to 22, or a metal ratio of 11 to 18, or a metal ratio of at least 11.
  • the metal-containing detergent may also include "hybrid" detergents formed with mixed surfactant systems including phenate and/or sulfonate components, e.g., phenate-salicylates, sulfonate-phenates, sulfonate-salicylates, sulfonates-phenates-salicylates, as described, for example, in US Patents 6,429,178; 6,429,179; 6,153,565; and 6,281,179.
  • phenate-salicylates e.g., phenate-salicylates, sulfonate-phenates, sulfonate-salicylates, sulfonates-phenates-salicylates, as described, for example, in US Patents 6,429,178; 6,429,179; 6,153,565; and 6,281,179.
  • hybrid detergent would be considered equivalent to amounts of distinct salicylate and sulfonate detergents introducing like amounts of salicylate and sulfonate soaps, respectively.
  • Overbased phenates and salicylates typically have a total base number of 180 to 450 TBN.
  • Overbased sulfonates typically have a total base number of 250 to 800, or 300 to 600.
  • Overbased detergents are known in the art.
  • Alkylphenols are often used as constituents in and/or building blocks for overbased detergents.
  • Alkylphenols may be used to prepare phenate, salicylate, salixarate, or saligenin detergents or mixtures thereof.
  • Suitable alkylphenols may include para-substituted hydrocarbyl phenols.
  • the hydrocarbyl group may be linear or branched aliphatic groups of 1 to 60 carbon atoms, 8 to 40 carbon atoms, 10 to 24 carbon atoms, 12 to 20 carbon atoms, or 16 to 24 carbon atoms.
  • the alkylphenol overbased detergent is prepared from an alkylphenol or mixture thereof that is free of or substantially free of (i.e., contains less than 0.1 weight percent) p-dodecylphenol.
  • the lubricating composition contains less than 0.3 weight percent of alkylphenol, less than 0.1 weight percent of alkylphenol, or less than 0.05 weight percent of alkylphenol.
  • the alkylphenol detergent is a salicylate.
  • Salicylate detergents prepared in this manner may be prepared from linear and/or branched alkylating agents (usually 1 -olefins) containing 6 to 50 carbon atoms, 10 to 30 carbon atoms, or 14 to 24 carbon atoms.
  • the overbased detergent is a salicylate detergent.
  • the salicylate detergent is free of unreacted p-alkylphenol (i.e., contains less than 0.1 weight percent).
  • the salicylate detergent is prepared by alkylation of salicylic acid.
  • the alkaline earth metal salicylate detergent has a TBN (KOH/g) of from 200 to 575 or 200 to 500. In another embodiment, the alkaline earth metal salicylate detergent has a TBN (KOH/g) of from 250 to 350. In one embodiment, the alkaline earth metal salicylate detergent has a metal ratio of from 2 to 7, or from 2 to 4, or from 2.5 to 3.5. In one embodiment, the alkaline earth metal salicylate detergent is present in the lubricating composition in an amount of from 0.1 to 5 wt %. In another embodiment, the alkaline earth metal salicylate detergent is present in the lubricating composition in an amount of from 0.2 to 3 wt %.
  • the alkaline earth metal salicylate detergent is present in the lubricating composition in an amount of from 0.5 to 3 wt %. In one embodiment, the alkaline earth metal salicylate detergent is present in the lubricating composition in an amount of from 0.8 to 2.5 wt %. In one embodiment, the calcium alkaline earth metal detergent is present in the lubricating composition in an amount of from 0.9 to 2.3 wt %.
  • the alkaline earth metal salicylate detergent may be a calcium salicylate, a magnesium salicylate or combinations thereof.
  • the alkaline earth metal salicylate is a calcium salicylate.
  • the alkaline earth metal salicylate is a magnesium salicylate.
  • the calcium salicylate may be present in an amount to deliver 150 to 1500 ppm calcium to the lubricant composition, or 250 to 1100 ppm calcium to the composition.
  • the magnesium salicylate may be present in an amount to deliver 100 to 2000 ppm of magnesium to the lubricant composition, or 250 to 1750 ppm magnesium, or 300 to 1550 ppm to the lubricant composition.
  • the alkaline earth metal sulfonate may be a neutral sulfonate salt (metal ratio less than 1.3), a low overbased detergent (metal ration of 1.5 to 6), or a high overbased detergent (metal ratio of at least 8), or any combination therein, such that at least 0.1 weight percent of alkaline earth metal soap is present in the lubricant composition.
  • Alkaline earth metal sulfonate detergents may be linear alkylbenzene sulfonate detergent as is described in paragraphs [0026] to [0037] of US Patent Publication 2005/065045 (and granted as US 7,407,919).
  • the linear alkylbenzene sulfonate detergent may be particularly useful for assisting in improving fuel economy.
  • the linear alkyl group may be attached to the benzene ring anywhere along the linear chain of the alkyl group, but often in the 2, 3 or 4 position of the linear chain, and in some instances, predominantly in the 2 position, resulting in the linear alkylbenzene sulfonate detergent.
  • the alkaline earth metal sulfonate detergent of the instant disclosure is selected from a calcium sulfonate detergent and a magnesium sulfonate detergent.
  • the alkaline earth metal sulfonate detergent is a calcium sulfonate detergent.
  • the calcium sulfonate detergent has a TBN of less than 250 on an oil free basis.
  • the calcium sulfonate detergent has a TBN of less than 200, or less than 150, or less than 80.
  • the calcium sulfonate detergent has a TBN of from 50 to 90.
  • the calcium sulfonate has a TBN from 120 to 250 mg KOH/g and a metal ratio of 1.5 to 5.
  • the alkaline earth metal sulfonate detergent is a calcium sulfonate detergent present in the lubricating composition in an amount of from 0. 1 wt % to 2.0 wt %. In another embodiment, the calcium sulfonate detergent is present in the lubricating composition in an amount of from 0.3 wt % to 1.5 wt %. [0054] In one embodiment, the alkaline earth metal sulfonate detergent is a magnesium sulfonate detergent. The magnesium sulfonate may have a TBN (mg KOH/g) of from 300 to 800 on an oil-free basis.
  • magnesium sulfonate may have a TBN (mg KOH/g) of from 400 to 750. In other embodiments, the magnesium sulfonate may have a TBN (mg KOH/g) of from 250 to 350. In other embodiments, the magnesium sulfonate may have a TBN (mg KOH/g) of from 350 to 375. In one embodiment, the magnesium sulfonate may have a metal ratio of 8 to 30, 10 to 25, or 12 to 18. [0055] In one embodiment, the magnesium sulfonate detergent is present in the lubricating composition in an amount of from 0.05 wt % to 0.5 wt % or 0.05 to 0.2. In another embodiment, the magnesium sulfonate detergent is present in the lubricating composition in an amount of from 0.06 to 0.1 wt % or 0.06 wt % to 0.2 wt %.
  • the alkaline earth metal sulfonate may be a combination of at least one neutral or low overbased alkaline earth metal sulfonate (i.e., metal ratio less than 6) and at least one high overbased alkaline earth metal sulfonate (metal ratio of at least 8).
  • the alkaline earth metal detergent used herein may be sodium salts, calcium salts, magnesium salts, or mixtures thereof of sulfonates.
  • the alkaline earth metal sulfonate detergent is a calcium sulfonate detergent, a magnesium sulfonate detergent or mixtures thereof.
  • one or more of the calcium sulfonate detergent and the magnesium sulfonate detergent are overbased.
  • the alkaline earth metal detergent is an overbased calcium sulfonate detergent.
  • the alkaline earth metal detergent is an overbased magnesium sulfonate detergent.
  • the alkaline earth metal detergent is mixture of an overbased calcium sulfonate detergent and an overbased magnesium sulfonate detergent.
  • the alkaline earth metal sulfonate detergent is a mixture of 0.6 wt % to 1.5 wt % of a calcium sulfonate detergent having a TBN (mg KOH/g) of from 50 to 200 and 0.04 wt % to 0.1 wt % of an overbased magnesium sulfonate detergent having a TBN (mg KOH/g) of from 400 to 800.
  • the detergents of the disclosed lubricating compositions may include alkaline earth metals contributed from the detergents.
  • the calcium salicylate detergent is present in an amount to deliver 150 to 1500 ppm, or 250 to 1100 ppm, or 300 to 800 ppm of calcium to the lubricating composition.
  • the alkaline earth metal detergent includes a calcium sulfonate detergent the calcium sulfonate detergent may be present in an amount to deliver 100 to 1000 ppm, 150 to 800 ppm, or 250 to 650 ppm calcium to the lubricating compositions.
  • the magnesium sulfonate detergent may be present in an amount to deliver 50 to 500, 100 to 425, or 150 to 350 ppm magnesium to the lubricating composition.
  • the alkaline earth metal detergent includes a calcium sulfonate detergent and the total amount of calcium delivered to the lubricating composition from the calcium salicylate detergent and the calcium sulfonate detergent is 800 to 2500, 900 to 1800, 950 to 1450 ppm calcium to the lubricating composition.
  • Metal -containing detergents contribute sulfated ash to a lubricating composition.
  • Sulfated ash may be determined by ASTM D874.
  • the total sulfated ash delivered to the lubricating composition from the alkaline earth metal salicylate detergent and the alkaline earth metal detergent is from 0.25 to 0.95 weight percent.
  • the alkaline earth salicylate detergent is present in an amount to deliver 0.05 to 0.5 weight percent, or 0.1 to 0.35 weight percent sulfated ash to the lubricating compositions.
  • the alkaline earth metal detergent is present in an amount to deliver 0.05 to 0.75, or 0.1 to 0.6 weight percent sulfated ash to the lubricating composition.
  • overbased detergents contribute detergent soap, also referred to as neutral detergent salt, to the lubricating composition.
  • Soap being a metal salt of the substrate, may act as a surfactant in the lubricating composition.
  • the alkaline earth metal sulfonate detergents are present in an amount to deliver 0.1 wt % to 1.5 wt %, or 0.15 to 1.2 wt %, or 0.2 wt % to 0.9 wt % sulfonate soap to the lubricant composition.
  • the alkaline earth metal salicylate detergents are present in an amount to deliver 0.3 wt % to 1.4 wt %, or 0.35 wt % to 1.2 wt %, or 0.4 wt % to 1.0 wt % salicylate soap to the lubricant composition.
  • the alkaline earth metal soap may be calcium, magnesium, or any mixture thereof.
  • alkaline earth metal sulfonate soap is present in an amount 0.2 wt % to 0.8 wt % of the lubricant composition
  • the alkaline earth metal salicylate soap is present in an amount 0.3 wt % to 1.0 wt % of the lubricant composition.
  • the total of all alkaline earth metal detergent soap may be present in an amount 0.6 wt % to 2.1 wt %, or 0.7 wt % to 1.4 wt % of the lubricant composition.
  • the lubricating composition of the instant disclosure further includes one or more phosphorus-containing antiwear agents.
  • Phosphorus-containing anti-wear agents are well known to one skilled in the art and include metal dialkyl(dithio)phosphate salts, hydrocarbyl phosphites, hydrocarbyl phosphines, hydrocarbyl phosphonates, alkylphosphate esters, amine or ammonium (alkyl)phosphate salts, and combinations thereof.
  • the compositions include secondary zinc dialkyldithiophosphates. In some embodiments, the compositions include a mixture of primary and secondary zinc dialkyldithiophosphates. In some embodiments component (b) is a mixture of primary and secondary zinc dialkyldithiophosphates where the ratio of primary zinc dialkyldithiophosphates to secondary zinc dialkyldithiophosphates (one a weight basis) is at least 1 : 1, or even at least 1 : 1.2, or even at least 1 : 1.5 or 1 :2, or 1 : 10.
  • suitable metal dialkyldithiophosphate include metal salts of the formula: where R 1 and R 2 are independently hydrocarbyl groups containing 3 to 24 carbon atoms, or 3 to 12 carbon atoms, or 3 to 8 carbon atoms; M is a metal having a valence n and generally incudes zinc, copper, iron, cobalt, antimony, manganese, and combinations thereof.
  • R 1 and R 2 are secondary aliphatic hydrocarbyl groups containing 3 to 8 carbon atoms, and M is zinc.
  • the phosphorus-containing anti-wear agent may be a zinc free phosphorus compound.
  • the zinc-free phosphorus anti-wear agent may contain sulfur or may be sulfur-free.
  • Sulfur-free phosphorus-containing antiwear agents include hydrocarbyl phosphites, hydrocarbyl phosphines, hydrocarbyl phosphonates, alkylphosphate esters, amine or ammonium phosphate salts, or mixtures thereof.
  • the phosphorus-containing antiwear agent is present in the lubricating composition in an amount to deliver from 300 ppm to 900 ppm phosphorus to the lubricating composition.
  • the antiwear agent is ZDDP and is present in the composition in an amount to deliver 400 ppm to 850 ppm, or 450 ppm to 800 ppm, or 500 ppm to 800 ppm, or 550 ppm to 780 ppm, or 650 ppm to 780 ppm phosphorus to the lubricating composition.
  • the phosphorus-containing anti-wear agent is present in an amount 0.2 to 2 wt %, or 0.3 to 1.3 wt %, or 0.5 to 0.95 wt % of the lubricant composition.
  • a lubricating composition may be prepared by blending the oil of lubricating viscosity, the first PIB succinimide dispersant, the second succinimide dispersant, the calcium salicylate detergent, the alkaline earth metal detergent, the phosphorous antiwear agent and, optionally one or more performance additives (as described herein below).
  • the other performance additives include at least one of metal deactivators, viscosity modifiers, friction modifiers, antiwear agents, corrosion inhibitors, extreme pressure agents, antioxidants, foam inhibitors, demulsifiers, pour point depressants, seal swelling agents and mixtures thereof.
  • metal deactivators include at least one of metal deactivators, viscosity modifiers, friction modifiers, antiwear agents, corrosion inhibitors, extreme pressure agents, antioxidants, foam inhibitors, demulsifiers, pour point depressants, seal swelling agents and mixtures thereof.
  • fully formulated lubricating oil will contain one or more of these performance additives.
  • the lubricating composition in a further embodiment comprises an antioxidant, wherein the antioxidant comprises a phenolic or an aminic antioxidant or mixtures thereof.
  • the antioxidants include diarylamines, alkylated diarylamines, hindered phenols, or mixtures thereof. When present the individual antioxidants are independently present at 0.1 wt % to 3 wt %, or 0.5 wt % to 2.75 wt %, or 1 wt % to 2.5 wt % of the lubricating composition.
  • the diarylamine or alkylated diarylamine may be a phenyl-a-naphthylamine (PANA), an alkylated diphenylamine, or an alkylated phenylnapthylamine, or mixtures thereof.
  • the alkylated diphenylamine may include di-nonylated diphenylamine, nonyl diphenylamine, octyl diphenylamine, di-octylated diphenylamine, di-decylated diphenylamine, decyl diphenylamine and mixtures thereof.
  • the diphenylamine may include nonyl diphenylamine, dinonyl diphenylamine, octyl diphenylamine, dioctyl diphenylamine, or mixtures thereof.
  • the alkylated diphenylamine may include nonyl diphenylamine, or dinonyl diphenylamine.
  • the alkylated diarylamine may include octyl, di-octyl, nonyl, di-nonyl, decyl or di-decyl phenylnapthylamines.
  • the hindered phenol antioxidant often contains a secondary butyl and/or a tertiary butyl group as a sterically hindering group.
  • the phenol group may be further substituted with a hydrocarbyl group (typically linear or branched alkyl) and/or a bridging group linking to a second aromatic group.
  • hindered phenol antioxidants examples include 2,6-di-tert-butylphenol, 4-methyl-2,6-di-tert- butylphenol, 4-ethyl-2,6-di-tert-butylphenol, 4-propyl-2,6-di-tert-butylphenol or 4- butyl-2,6-di-tert-butylphenol, or 4-dodecyl-2,6-di-tert-butylphenol.
  • the hindered phenol antioxidant may be an ester and may include, e.g., IrganoxTM L-135 from Ciba.
  • Suitable hindered phenol esters include hydrocarbyl esters of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoic acid, such as hydrocarbyl esters containing 3 to 18 carbon atoms, or 4 to 12 carbon atoms, or 6 to 10 carbon atoms.
  • hydrocarbyl esters containing 3 to 18 carbon atoms, or 4 to 12 carbon atoms, or 6 to 10 carbon atoms is found in US Patent 6,559,105.
  • the lubricating compositions contains a friction modifier.
  • the friction modifier may be chosen from long chain fatty acid derivatives of amines, long chain fatty esters, or derivatives of long chain fatty epoxides; fatty imidazolines; amine salts of alkylphosphoric acids; fatty alkyl tartrates; fatty alkyl tartrimides; fatty alkyl tartramides; fatty glycolates; fatty glycolamides; and combinations thereof.
  • the term “fatty alkyl” or “fatty” in relation to friction modifiers means a carbon chain having 10 to 24 carbon atoms, typically a straight carbon chain, which may be saturated or unsaturated.
  • Suitable friction modifiers include long chain fatty acid derivatives of amines, fatty esters, or fatty epoxides; fatty imidazolines such as condensation products of carboxylic acids and polyalkylene-polyamines; amine salts of alkylphosphoric acids; fatty alkyl tartrates; fatty alkyl tartrimides; fatty alkyl tartramides; fatty phosphonates; fatty phosphites; borated phospholipids, borated fatty epoxides; glycerol esters; borated glycerol esters; fatty amines; alkoxylated fatty amines; borated alkoxylated fatty amines; hydroxyl and polyhydroxy fatty amines including tertiary hydroxy fatty amines; hydroxy alkyl amides; metal salts of fatty acids; metal salts of alkyl salicylates; fatty oxazolines; fatty ethoxylated alcohol
  • Friction modifiers may also encompass materials such as sulfurized fatty compounds and olefins, molybdenum compounds such as molybdenum dialkyldithiophosphates, molybdenum dithiocarbamates, amine salted molybdenum acid compounds, and molybdenum post-treated succinimide dispersants.
  • Molybdenum dithiocarbamates may be mono-nuclear, di-nuclear, or even tri-nuclear complexes.
  • Suitable molybdenum compounds may be present as Mo(IV) complexes, or Mo(V) complexes, or Mo(VI) complexes, or combinations thereof and include commercial materials such as Sakura-lube 525 from Adeka Co. Ltd and Molyvan® 855 from Vanderbilt Chemicals LLC.
  • the friction modifier may be a long chain fatty acid ester.
  • the long chain fatty acid ester may be a monoester and in another embodiment the long chain fatty acid ester may be a triglyceride.
  • Suitable triglycerides include vegetable oils, such as soybean oil or sunflower oil.
  • the ashless friction modifier may be present in the lubricating composition in an amount of from 0.01 to 2.5 wt %, or 0.1 to 0.5 wt %, or 0.3 to 2.0 wt %, or 0.5 to 0.9 wt %.
  • the lubricating composition optionally further includes at least one antiwear agent other than the phosphorus-containing antiwear agent described above.
  • antiwear agents examples include titanium compounds, tartaric acid esters, tartrimides, thiocarbamate-containing compounds, such as thiocarbamate esters, thiocarbamate amides, thiocarbamic ethers, alkylene-coupled thiocarbamates, and bis(S-alkyldithiocarbamyl) disulphides.
  • the antiwear agent may in one embodiment include a tartrate, or tartrimide as disclosed in International Publication WO 2006/044411 or Canadian Patent CA 1 183 125.
  • the tartrate or tartrimide may contain alkyl-ester groups, where the sum of carbon atoms on the alkyl groups is at least 8.
  • the antiwear agent may in one embodiment include a citrate as is disclosed in US Patent Application 20050198894.
  • Another class of additives includes oil-soluble titanium compounds as disclosed in US 7,727,943 and US2006/0014651.
  • the oil-soluble titanium compounds may function as antiwear agents, friction modifiers, antioxidants, deposit control additives, or more than one of these functions.
  • the oil soluble titanium compound is a titanium (IV) alkoxide.
  • the titanium alkoxide is formed from a monohydric alcohol, a polyol or mixtures thereof.
  • the monohydric alkoxides may have 2 to 16, or 3 to 10 carbon atoms.
  • the titanium alkoxide is titanium (IV) isopropoxide.
  • the titanium alkoxide is titanium (IV) 2-ethylhexoxide.
  • the titanium compound comprises the alkoxide of a vicinal 1 ,2-diol or polyol.
  • the 1,2- vicinal diol comprises a fatty acid mono-ester of glycerol, often the fatty acid is oleic acid.
  • the oil soluble titanium compound is a titanium carboxylate.
  • the titanium (IV) carboxylate is titanium neodecanoate.
  • EP agents that are soluble in the oil include sulfur- and chlorosulfur-containing EP agents, dimercaptothiadiazole or CS2 derivatives of dispersants (typically succinimide dispersants), derivative of chlorinated hydrocarbon EP agents and phosphorus EP agents.
  • EP agents include chlorinated wax; sulfurized olefins (such as sulfurized isobutylene), a hydrocarbyl-substituted 2,5-dimercapto-l,3,4-thiadiazole, or oligomers thereof, organic sulphides and polysulphides such as dibenzyldisulphide, bis-(chlorobenzyl) disulphide, dibutyl tetrasulphide, sulfurized methyl ester of oleic acid, sulfurized alkylphenol, sulfurized dipentene, sulfurized terpene, and sulfurized Diels-Alder adducts; phosphosulfurized hydrocarbons such as the reaction product of phosphorus sulphide with turpentine or methyl oleate; phosphorus esters such as the dihydrocarbon and trihydrocarbon phosphites, e.g., dibutyl phosphite, diheptyl phosphite, dicyclo
  • Foam inhibitors that may be useful in the instant compositions and include polysiloxanes, copolymers of ethyl acrylate and 2-ethylhexylacrylate and optionally vinyl acetate; demulsifiers including fluorinated polysiloxanes, trialkyl phosphates, polyethylene glycols, polyethylene oxides, polypropylene oxides and (ethylene oxidepropylene oxide) polymers.
  • Polymeric viscosity index improvers also referred to as viscosity modifiers (VM) or dispersant viscosity modifiers (DVM, may be useful in the compositions disclosed herein.
  • the dispersant viscosity modifier may be generally understood to be a functionalized, i.e. derivatized, form of a polymer similar to that of the polymeric viscosity modifier.
  • the polymeric viscosity modifier may be an olefin (co)polymer, a poly(meth)acrylate (PMA), or mixtures thereof.
  • the polymeric viscosity modifier is an olefin (co)polymer or dispersant viscosity modifier derived therefrom.
  • the olefin polymer may be derived from isobutylene or isoprene.
  • the olefin polymer is prepared from ethylene and a higher olefin within the range of C3-C10 alpha-mono-olefins, for example, the olefin polymer may be prepared from ethylene and propylene.
  • Useful olefin polymers, in particular, ethylene-a-olefin copolymers have a number average molecular weight ranging from 4500 to 500,000, for example, 5000 to 100,000, or 7500 to 60,000, or 8000 to 45,000.
  • the formation of functionalized ethylene-a-olefin copolymer is well known in the art, for instance those described in U.S. Patent US 7,790,661 column 2, line 48 to column 10, line 38. Additional detailed descriptions of similar functionalized ethylene-a-olefin copolymers are found in International Publication W02006/015130 or U.S. Patents 4,863,623; 6, 107,257; 6,107,258; 6,117,825; and US 7,790,661.
  • the functionalized ethylene-a-olefin copolymer may include those described in U.S. Patent 4,863,623 (see column 2, line 15 to column 3, line 52) or in International Publication W02006/015130 (see page 2, paragraph [0008] and preparative examples are described paragraphs [0065] to [0073]).
  • the lubricating composition comprises a dispersant viscosity modifier (DVM).
  • DVM dispersant viscosity modifier
  • the DVM may comprise an olefin polymer that has been modified by the addition of a polar moiety.
  • the acylating agent grafts onto the olefin polymer to give two carboxylic acid functionalities.
  • useful acylating agents include maleic anhydride, chlormaleic anhydride, itaconic anhydride, or the reactive equivalents thereof, for example, the corresponding dicarboxylic acids, such as maleic acid, fumaric acid, cinnamic acid, (meth)acrylic acid, the esters of these compounds and the acid chlorides of these compounds.
  • the functionalized ethylene-a-olefin copolymer comprises an olefin copolymer grafted with the acyl group, which is further functionalized with a hydrocarbyl amine, a hydrocarbyl alcohol group, amino- or hydroxy- terminated polyether compounds, and mixtures thereof.
  • lubricating composition may comprise a poly(meth)acrylate polymeric viscosity modifier.
  • (meth)acrylate and its cognates means either methacrylate or acrylate, as will be readily understood.
  • the poly(meth)acrylate polymer is prepared from a monomer mixture comprising (meth)acrylate monomers having alkyl groups of varying length.
  • the (meth)acrylate monomers may contain alkyl groups that are straight chain or branched chain groups.
  • the alkyl groups may contain 1 to 24 carbon atoms, for example, 1 to 20 carbon atoms.
  • the poly(meth)acrylate polymer comprises a dispersant monomer; dispersant monomers include those monomers which may copolymerize with (meth)acrylate monomers and contain one or more heteroatoms in addition to the carbonyl group of the (meth)acrylate.
  • the dispersant monomer may contain a nitrogen-containing group, an oxygen-containing group, or mixtures thereof.
  • Dispersant monomers may be present in an amount up to 5 mol percent of the monomer composition of the (meth)acrylate polymer. In one embodiment, the poly(meth)acrylate is present in an amount 0 to 5 mol percent, 0.5 to 4 mol percent, or 0.8 to 3 mol percent of the polymer composition. In one embodiment, the poly(meth)acrylate is free of or substantially free of dispersant monomers.
  • the poly(meth)acrylate polymers may have an architecture selected from linear, branched, hyper-branched, cross-linked, star (also referred to as “radial”), or combinations thereof.
  • Star or radial refers to multi -armed polymers.
  • Such polymers include (meth)acrylate-containing polymers comprising 3 or more arms or branches, which, in some embodiments, contain at least about 20, or at least 50 or 100 or 200 or 350 or 500 or 1000 carbon atoms.
  • Linear poly(meth)acrylates may have weight average molecular weight (Mw) of 1000 to 400,000 Daltons, 1000 to 150,000 Daltons, or 15,000 to 100,000 Daltons.
  • the poly(meth)acrylate may be a linear block copolymer with a Mw of 5,000 to 40,000 Daltons, or 10,000 to 30,000 Daltons.
  • Radial, cross-linked or star copolymers may be derived from linear random or di-block copolymers with molecular weights as described above.
  • a star polymer may have a weight average molecular weight of 10,000 to 1,500,000 Daltons, or 40,000 to 1,000,000 Daltons, or 300,000 to 850,000 Daltons.
  • polymeric viscosity modifiers is styrene-diene (SD) copolymers, such as styrene isoprene (SI) and styrene butadiene (SBR).
  • SD styrene-diene
  • SI styrene isoprene
  • SBR styrene butadiene
  • Styrenediene copolymers may be linear or radial (star-shaped), and generally contain one or more distinct blocks of styrene attached to one or more distinct blocks of hydrogenated diene.
  • the lubricating compositions may comprise 0.05 weight % to 2 weight %, or 0.08 weight % to 1.2 weight %, or 0.1 to 0.8 weight % of the one or more polymeric viscosity modifiers and/or dispersant viscosity modifiers.
  • pour point depressants that may be useful in the compositions disclosed herein include polyalphaolefins, esters of maleic anhydride-styrene copolymers, poly(meth)acrylates, polyacrylates or polyacrylamides.
  • Demulsifiers include trialkyl phosphates, and various polymers and copolymers of ethylene glycol, ethylene oxide, propylene oxide, or mixtures thereof.
  • Metal deactivators include derivatives of benzotriazoles (typically tolyltriazole), 1,2,4-triazoles, benzimidazoles, 2-alkyldithiobenzimidazoles or 2- alkyldithiobenzothiazoles. The metal deactivators may also be described as corrosion inhibitors.
  • Seal swell agents include sulfolene derivatives Exxon Necton-37TM (FN 1380) and Exxon Mineral Seal OilTM (FN 3200).
  • the lubricating composition may further include one or more dispersants different from that of the first PIB succinimide dispersant and the second PIB succinimide dispersant of the compositions disclosed herein.
  • dispersants include succinimide dispersants different from that of described compositions, Mannich dispersants, polyolefin succinic acid esters, amides, or ester-amides, or mixtures thereof.
  • the additional dispersant may be a PIBsuccinimide similar to the dispersants of the described compositions, derived from polyisobutylene with a number average molecular weight of 800 Daltons to 2600 Daltons. Additional dispersants may be present to provide a boost to soot handling or as sources of ashless TBN. Soot dispersants may be functionalized with an aromatic (poly)amine. Dispersants used as TBN boosters typically have high TBN, such as greater than 80 mg KOH/g, greater than 95 mg KOH/g, or even greater than 110 mg KOH/g.
  • the additional dispersant may be present in an amount 0.05 to 2 wt %, or 0.1 to 1.1 wt %, or 0.2 to 0.8 wt % of the lubricant composition.
  • the lubricating compositions disclosed herein are suitable for use in diesel engines. Diesel engines are classified by their Gross Vehicle Weight Rating (GVWR). The GVWR includes the maximum rated weight of the vehicle and cargo, including passengers. The GVWR is applied to trucks or trailers, but not the two combined, which is a separate rating referred to as the Gross Combined Weight Rating (GCWR).
  • GVWR Gross Vehicle Weight Rating
  • the GVWR’s for various classes of diesel engines are set forth in the table below:
  • Light duty vehicles are classified as those falling in Class 1 to 3. Class 2A vehicles are typically called “light duty” and class 2B vehicles are often called “light heavy duty” vehicles.
  • Medium duty vehicles refer to those falling into Classes 4 to 6. Heavy- Duty vehicles are those classified in Class 7 and Class 8.
  • the internal combustion engine is a heavy-duty diesel compression ignited (or spark assisted compression ignited) internal combustion engine.
  • the sulfur content of the lubricating composition may be 1 wt % or less, or 0.8 wt % or less, or 0.5 wt % or less, or 0.3 wt % or less. In one embodiment, the sulfur content may be in the range of 0.001 wt % to 0.5 wt %, or 0.01 wt % to 0.3 wt %.
  • the sulfated ash content may be 0.2 to 1.2 wt % of the lubricating composition.
  • the lubricating compositions disclosed herein may have a sulfated ash content of from 0.2 to 1.2 wt %, or from 0.3 to 1.1 wt %, or 0.4 to 0.8 wt %.
  • the lubricating composition may be characterized as having a total base number (TBN) content of at least 3, or at least 4, or at least 5 mg KOH/g.
  • TBN total base number
  • the lubricating composition may be characterized as having a total base number (TBN) content of 5 to 10 mg KOH/g, or 5 to 8.5 mg KOH/g.
  • TBN total base number
  • the lubricating compositions disclosed herein have a kinematic viscosity as measured by ASTM D-445 at 100°C of from 2.5 to 8.3, or 3.5 to 6.5 cSt (mm 2 /s) and a kinematic viscosity at 40°C of from 15 to 30 cSt (mm 2 /s).
  • the lubricating composition has a kinematic viscosity at 100°C of from 2.5 to 6.5 or 3 to 5.5 cSt (mm 2 /s) and a kinematic viscosity at 40°C of from 15 to 25 cSt (mm 2 /s).
  • the lubricating composition disclosed herein have a high temperature, high shear viscosity (HTHS) as measured by ASTM D4683 at 150° C of less than 2.6 mPa-s, or less than 2.5 mPa-s, or less than 2.3 mPa-s, or less than 2.1 mPa-s.
  • the HTHS of the lubricating composition is from 1.4 to 2.5 mPa-s, or from 1.6 to 2.1 mPa-s, or from 1.8 to 2.1 mPa-s, or from 1.9 to 2.0 mPa-s.
  • the lubricating composition may have a SAE viscosity grade of 0W-Y, wherein Y may be 12, 16, or 20. In one embodiment, the lubricating composition has an SAE viscosity grade of OW-12.
  • the internal combustion engine disclosed herein may have a steel surface on a cylinder bore, cylinder block, or piston ring.
  • the internal combustion engine may have a surface of steel, or an aluminum alloy, or an aluminum composite.
  • the compression-ignition internal combustion engine has a maximum laden mass over 3,500 kg.
  • the instant disclosure is further directed to a method of lubricating a diesel engine by supplying to the diesel engine any one of the lubricating compositions disclosed herein.
  • the method includes lubricating a diesel engine by supplying to said engine a lubricating composition having an oil of lubricating viscosity having greater than 50 weight percent of a Group III base oil, a Group IV base oil, or mixtures thereof; a first PIB succinimide dispersant derived from an 1800 to 2500 Mn PIB; a second PIB succinimide dispersant derived from a PIB with an Mn less than 1600, where at least one of the first PIB succinimide dispersant and the second PIB succinimide dispersant is boron-free; a calcium salicylate detergent; an alkaline earth metal sulfonate detergent present in an amount to deliver 0.3 wt % to 2.1 wt % of alkaline earth metal soap to the
  • the lubricating composition disclosed herein may have a composition as described in the following table:
  • a series of OW-12 engine lubricants in Group III base oil of lubricating viscosity are prepared containing the additives described above as well as conventional additives including polymeric viscosity modifiers, corrosion inhibitors, pourpoint depressants, as well as other performance additives as follows (Table 1).
  • Additives include pourpoint depressant, foam inhibitor, and low levels of corrosion inhibitors and compatibilizers.
  • Lubricating examples of Table 1 are evaluated for fuel economy improvement and ability to prevent/reduce wear. Results are summarized, along with other chemical and physical properties related to performance (Table 2). Fuel economy improvement is measured according to the Volvo D13TC fuel economy test. In this test, improvement is determined relative to a pre-selected reference oil; in these data, Example 8 (EX8) was selected as the reference oil.
  • HFRR high frequency reciprocating rig
  • Lubricant compositions of the described herein also provide cleanliness, deposit control, and oxidation control in suitable bench tests. Deposit performance can be measured according to the Thermo-Oxidation Engine Oil Simulation Test (TEOST 33) as presented in ASTM D6335. The results of the TEOST 33 test show the milligrams of deposit after an engine oil is run at elevated temperatures. Lower TEOST 33 results are indicative of improved resistance to deposit formation.
  • the lubricating compositions can be tested for deposit control in a Panel Coker heated to 325° C., with a sump temperature of 105° C., and a splash/bake cycle of 120 s/45 s.
  • the airflow is 350 ml/min, with a spindle speed of 1000 rpm and the test lasts for 4 hours.
  • the oil is splashed onto an aluminum panel which is then optically rated by computer. Performance ranges from 0% (black panel) to 100% (clean panel).
  • Fuel economy of the disclosed lubricating compositions can be tested and may have improvements pursuant to any one of the Mi l l Fuel Economy Test (CEC L-54-96), Daimler OM501LA Fuel Economy Test, NEDC MB Fuel Economy Tests, and ILSAC Sequence VI Engine Test. Friction performance may also be evaluated in any of several high frequency reciprocating rig (HFRR) bench test, e.g., ASTM D6079.
  • HFRR high frequency reciprocating rig
  • hydrocarbyl substituent or “hydrocarbyl group” is used in its ordinary sense, which is well-known to those skilled in the art. Specifically, it refers to a group having a carbon atom directly attached to the remainder of the molecule and having predominantly hydrocarbon character including one or more double bonds.
  • hydrocarbyl groups include: hydrocarbon substituents, that is, aliphatic (e.g., alkyl or alkenyl), alicyclic (e.g., cycloalkyl, cycloalkenyl) substituents, and aromatic-, aliphatic-, and alicyclic- substituted aromatic substituents, as well as cyclic substituents wherein the ring is completed through another portion of the molecule (e.g., two substituents together form a ring); substituted hydrocarbon substituents, that is, substituents containing non- hydrocarbon groups which, in the context of this invention, do not alter the predominantly hydrocarbon nature of the substituent (e.g., halo (especially chloro and fluoro), hydroxy, alkoxy, mercapto, alkylmercapto, nitro, nitroso, and sulfoxy); hetero substituents, that is, substituents which, while having a predominantly hydrocarbon character, in the context of this invention, contain other than
  • Heteroatoms include sulfur, oxygen, and nitrogen.
  • no more than two, or no more than one, non- hydrocarbon substituent will be present for every ten carbon atoms in the hydrocarbyl group; alternatively, there may be no non-hydrocarb on substituents in the hydrocarbyl group.
  • compositions, methods, and devices are described in terms of “comprising” various components or steps (interpreted as meaning “including, but not limited to”), the compositions, methods, and devices can also “consist essentially of” or “consist of” the various components and steps, and such terminology should be interpreted as defining essentially closed-member groups.
  • a range includes each individual member.
  • a group having 1-3 wt. % refers to groups having 1, 2, or 3 wt.%.
  • a group having 1-5 wt. % refers to groups having 1, 2, 3, 4, or 5 wt. %, and so forth, including all points therebetween.
  • a recited range for a treat rate shall include treat rates for individual components and/or a mixture of components.
  • a range of 1 to 3 wt % contemplates that a given component may be present in a range of 1 to 3 wt % or that a mixture of similar components can be present in a range from 1 to 3 wt %.
  • the term "about” means that a value of a given quantity is within ⁇ 20% of the stated value. In other embodiments, the value is within ⁇ 15% of the stated value. In other embodiments, the value is within ⁇ 10% of the stated value. In other embodiments, the value is within ⁇ 5% of the stated value. In other embodiments, the value is within ⁇ 2.5% of the stated value. In other embodiments, the value is within ⁇ 1% of the stated value. [00145] Unless otherwise stated, “wt %” as used herein shall refer to the weight percent based on the total weight of the composition on an oil-free basis.
  • the number average molecular weight of the dispersant viscosity modifier and viscosity modifier has been determined using known methods, such as GPC analysis using polystyrene standards. Methods for determining molecular weights of polymers are well known. The methods are described for instance: (i) P.J. Flory, “Principles of Polymer Chemistry”, Georgia University Press 91953), Chapter VII, pp 266-315; or (ii) “Macromolecules, an Introduction to Polymer Science”, F. A. Bovey and F. H. Winslow, Editors, Academic Press (1979), pp 296-312.
EP21801682.2A 2020-09-22 2021-09-22 Dieselmotorschmierzusammensetzungen und verfahren zur verwendung davon Pending EP4200387A1 (de)

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