FR3130838A1 - lubricating composition - Google Patents

lubricating composition Download PDF

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Publication number
FR3130838A1
FR3130838A1 FR2114103A FR2114103A FR3130838A1 FR 3130838 A1 FR3130838 A1 FR 3130838A1 FR 2114103 A FR2114103 A FR 2114103A FR 2114103 A FR2114103 A FR 2114103A FR 3130838 A1 FR3130838 A1 FR 3130838A1
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FR
France
Prior art keywords
lubricating composition
copolymer
composition according
butadiene
ethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR2114103A
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French (fr)
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FR3130838B1 (en
Inventor
Robert NGO
Julien Thuilliez
Thibaud Souchard
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Compagnie Generale des Etablissements Michelin SCA
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Compagnie Generale des Etablissements Michelin SCA
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Priority to FR2114103A priority Critical patent/FR3130838B1/en
Priority to PCT/EP2022/084954 priority patent/WO2023117456A1/en
Publication of FR3130838A1 publication Critical patent/FR3130838A1/en
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Publication of FR3130838B1 publication Critical patent/FR3130838B1/en
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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
    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/12—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing conjugated diene
    • 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
    • C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
    • C10M143/16—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing cycloaliphatic monomer
    • 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
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen 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
    • C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
    • 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
    • C10M2205/10—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing cycloaliphatic monomers
    • 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
    • C10N2030/02—Pour-point; Viscosity index
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

L’invention concerne une composition lubrifiante qui comprend une huile de base minérale et un copolymère d’éthylène et de 1,3-butadiène qui contient plus de 90% à moins de 97% en mole d’unités éthylène et qui a un taux de cristallinité supérieur à 30% et inférieur à 45%. Elle peut être utilisée en tant qu’huile de moteur.A lubricating composition comprising a mineral base oil and a copolymer of ethylene and 1,3-butadiene which contains greater than 90% to less than 97% by mole of ethylene units and which has a crystallinity greater than 30% and less than 45%. It can be used as motor oil.

Description

composition lubrifiantelubricating composition

Le domaine de la présente invention est celui des compositions lubrifiantes contenant une huile de base minérale et destinées à être utilisés en tant qu’huiles de moteur pour améliorer la performance des moteurs.The field of the present invention is that of lubricating compositions containing a mineral base oil and intended for use as engine oils to improve the performance of engines.

Les huiles de moteur, compositions lubrifiantes contenant des huiles de base minérales, sont utilisées dans un moteur pour minimiser à froid les pertes énergétiques causées par des frottements dans le moteur et pour maintenir à chaud un film continu de lubrifiant sur les éléments lubrifiés du moteur. Il est important que la viscosité de la composition lubrifiante diminue le moins possible pendant le fonctionnement à chaud pour éviter la rupture du film lubrifiant. Pour assurer à la fois ces deux fonctions à froid et à chaud, il est souhaitable de disposer d’une composition lubrifiante qui présente la plus faible variation de viscosité avec la température. Comme un indice de viscosité élevé garantit une baisse moindre de la viscosité lorsque la température augmente, il est donc recherché des compositions lubrifiantes possédant un indice de viscosité élevé.Motor oils, lubricating compositions containing mineral base oils, are used in an engine to minimize the energy losses caused by friction in the engine when cold and to maintain a continuous film of lubricant on the lubricated elements of the engine when hot. It is important that the viscosity of the lubricating composition decreases as little as possible during hot operation to avoid the breakdown of the lubricating film. To perform these two functions both cold and hot, it is desirable to have a lubricating composition which has the smallest variation in viscosity with temperature. As a high viscosity index guarantees a lesser drop in viscosity when the temperature increases, lubricating compositions having a high viscosity index are therefore sought after.

Les huiles de base minérales représentent un constituant majeur des compositions lubrifiantes telles que les huiles de moteur. La viscosité d’une huile de base minérale diminue avec une augmentation de la température et augmente avec une diminution de la température. Il s’ensuit que la viscosité d’une composition lubrifiante contenant majoritairement une huile de base minérale voit également sa viscosité varier avec la température.Mineral base oils represent a major constituent of lubricating compositions such as motor oils. The viscosity of a mineral base oil decreases with an increase in temperature and increases with a decrease in temperature. It follows that the viscosity of a lubricating composition mainly containing a mineral base oil also sees its viscosity vary with temperature.

Pour amoindrir cette influence de la température sur la viscosité d’une composition lubrifiante, il est connu d’ajouter des additifs à une huile de base minérale. Ces additifs dits améliorants d’indice de viscosité (en anglais « viscosity improver » ou « viscosity index improver) ont un rôle d’épaississement sélectif de la composition lubrifiante lorsque la température augmente pour remédier partiellement à la chute de la viscosité notée à chaud. Ils augmentent généralement la viscosité à haute température pour contrer la diminution de viscosité de l’huile de base minérale sans l’augmenter significativement à basse température. Les améliorants d’indice de viscosité sont généralement des polymères. Les deux grandes familles de polymères commercialisés comme améliorants d’indice de viscosité sont les polymères à fonction ester comme les poly(méth)acrylates et les polymères hydrocarbonés comme les polyisobutylènes, les copolymères d’éthylène et de propylène également appelés OCP, les copolymères de diène et de styrène hydrogénés, ainsi que les polydiènes hydrogénés. Néanmoins, il existe toujours un besoin d’améliorer encore l’indice de viscosité des compositions lubrifiantes contenant une huile de base minérale telles que les huiles de moteur.To reduce this influence of temperature on the viscosity of a lubricating composition, it is known to add additives to a mineral base oil. These so-called viscosity index improver additives have a role of selective thickening of the lubricating composition when the temperature increases to partially remedy the drop in viscosity noted when hot. They generally increase the viscosity at high temperature to counter the decrease in viscosity of the mineral base oil without increasing it significantly at low temperature. Viscosity index improvers are generally polymers. The two main families of polymers marketed as viscosity index improvers are polymers with an ester function such as poly(meth)acrylates and hydrocarbon polymers such as polyisobutylenes, copolymers of ethylene and propylene also called OCP, copolymers of hydrogenated diene and styrene, as well as hydrogenated polydienes. Nevertheless, there is still a need to further improve the viscosity index of lubricating compositions containing a mineral base oil such as motor oils.

La Demanderesse a découvert une nouvelle composition lubrifiante qui présente un indice de viscosité amélioré.The Applicant has discovered a new lubricating composition which has an improved viscosity index.

Ainsi, un premier objet de l’invention est une composition lubrifiante qui comprend une huile de base minérale et un copolymère d’éthylène et de 1,3-butadiène qui contient plus de 90% à moins de 97% en mole d’unités éthylène et qui a un taux de cristallinité supérieur à 30% et inférieur à 45%.Thus, a first object of the invention is a lubricating composition which comprises a mineral base oil and a copolymer of ethylene and 1,3-butadiene which contains more than 90% to less than 97% by mole of ethylene units. and which has a degree of crystallinity greater than 30% and less than 45%.

Claims (15)

Composition lubrifiante qui comprend une huile de base minérale et un copolymère d’éthylène et de 1,3-butadiène qui contient plus de 90% à moins de 97% en mole d’unités éthylène et qui a un taux de cristallinité supérieur à 30% et inférieur à 45%.A lubricating composition which comprises a mineral base oil and a copolymer of ethylene and 1,3-butadiene which contains more than 90% to less than 97% by mole of ethylene units and which has a degree of crystallinity greater than 30% and less than 45%. Composition lubrifiante selon la revendication 1 dans laquelle le taux de cristallinité du copolymère d’éthylène et de 1,3-butadiène est supérieur à 35%.Lubricating composition according to Claim 1, in which the degree of crystallinity of the copolymer of ethylene and 1,3-butadiene is greater than 35%. Composition lubrifiante selon la revendication 1 ou 2 dans laquelle le taux de cristallinité du copolymère d’éthylène et de 1,3-butadiène est inférieur à 43%.Lubricating composition according to Claim 1 or 2, in which the degree of crystallinity of the copolymer of ethylene and 1,3-butadiene is less than 43%. Composition lubrifiante selon l’une quelconque des revendications 1 à 3 dans laquelle le copolymère d’éthylène et de 1,3-butadiène contient de 92% à 95% en mole d’unités éthylène.Lubricating composition according to any one of Claims 1 to 3, in which the copolymer of ethylene and 1,3-butadiene contains from 92% to 95% by mole of ethylene units. Composition lubrifiante selon l’une quelconque des revendications 1 à 4 dans laquelle le copolymère d’éthylène et de 1,3-butadiène contient des unités 1,2-butadiène de formule –CH2-CH(CH=CH2)-.Lubricating composition according to any one of Claims 1 to 4, in which the copolymer of ethylene and 1,3-butadiene contains 1,2-butadiene units of the formula –CH 2 -CH(CH=CH 2 )-. Composition lubrifiante selon l’une quelconque des revendications 1 à 5 dans laquelle le copolymère d’éthylène et de 1,3-butadiène contient des unités 1,2-cyclohexane, motifs cycliques de formule (I), de préférence à un taux molaire supérieur à 1%, de manière plus préférentielle à un taux molaire supérieur ou égal à 2%.
Lubricating composition according to any one of Claims 1 to 5, in which the copolymer of ethylene and 1,3-butadiene contains 1,2-cyclohexane units, cyclic units of formula (I), preferably at a higher molar rate at 1%, more preferably at a molar rate greater than or equal to 2%.
Composition lubrifiante selon la revendication 6 dans laquelle le taux molaire des unités 1,2-cyclohexane dans le copolymère est inférieur à 4%.Lubricating composition according to Claim 6, in which the molar rate of 1,2-cyclohexane units in the copolymer is less than 4%. Composition lubrifiante selon l’une quelconque des revendications 1 à 7 dans laquelle le copolymère contient plus de 1% en mole d’unités butadiène, préférentiellement au moins 2% en mole d’unités butadiène.Lubricating composition according to any one of Claims 1 to 7, in which the copolymer contains more than 1% by mole of butadiene units, preferably at least 2% by mole of butadiene units. Composition lubrifiante selon l’une quelconque des revendications 1 à 8 dans laquelle le copolymère contient moins de 5% en mole d’unités butadiène.A lubricating composition according to any one of claims 1 to 8 wherein the copolymer contains less than 5 mol% butadiene units. Composition lubrifiante selon l’une quelconque des revendications 1 à 9 dans laquelle le copolymère a une masse molaire moyenne en nombre supérieure à 8000 g/mol, préférentiellement supérieure à 10000 g/mol.Lubricating composition according to any one of Claims 1 to 9, in which the copolymer has a number-average molar mass greater than 8,000 g/mol, preferably greater than 10,000 g/mol. Composition lubrifiante selon l’une quelconque des revendications 1 à 10 dans laquelle le copolymère a une masse molaire moyenne en nombre inférieure à 200 000 g/mol, préférentiellement inférieure à 150 000 g/mol, plus préférentiellement inférieure à 130 000 g/mol, encore plus préférentiellement inférieure à 100 000 g/mol.Lubricating composition according to any one of Claims 1 to 10, in which the copolymer has a number-average molar mass of less than 200,000 g/mol, preferably less than 150,000 g/mol, more preferably less than 130,000 g/mol, even more preferably less than 100,000 g/mol. Composition lubrifiante selon l’une quelconque des revendications 1 à 11 dans laquelle le copolymère est un copolymère statistique.A lubricating composition according to any of claims 1 to 11 wherein the copolymer is a random copolymer. Composition lubrifiante selon l’une quelconque des revendications 1 à 12 dans laquelle l’huile de base minérale est une huile du groupe I, une huile du groupe II ou une huile du groupe III.A lubricating composition according to any of claims 1 to 12 wherein the mineral base oil is a Group I oil, a Group II oil or a Group III oil. Composition lubrifiante selon l’une quelconque des revendications 1 à 13, laquelle composition est une huile de moteur.A lubricating composition according to any of claims 1 to 13, which composition is motor oil. Composition lubrifiante selon l’une quelconque des revendications 1 à 14 dans laquelle le taux massique du copolymère d’éthylène et de 1,3-butadiène varie dans un domaine allant de 0.01 à 5% en poids de la composition lubrifiante.Lubricating composition according to any one of Claims 1 to 14, in which the mass content of the copolymer of ethylene and 1,3-butadiene varies within a range ranging from 0.01 to 5% by weight of the lubricating composition.
FR2114103A 2021-12-21 2021-12-21 lubricating composition Active FR3130838B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2114103A FR3130838B1 (en) 2021-12-21 2021-12-21 lubricating composition
PCT/EP2022/084954 WO2023117456A1 (en) 2021-12-21 2022-12-08 Lubricant composition

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FR2114103A FR3130838B1 (en) 2021-12-21 2021-12-21 lubricating composition
FR2114103 2021-12-21

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FR3130838A1 true FR3130838A1 (en) 2023-06-23
FR3130838B1 FR3130838B1 (en) 2023-12-22

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050003974A1 (en) * 2003-07-01 2005-01-06 Stuart Briggs Viscosity index improvers for lubricating oil compositions
WO2007054224A2 (en) 2005-11-09 2007-05-18 Societe De Technologie Michelin Borohydride metallocene complex of a lanthanide, catalytic system including said complex, polymerisation method using same and ethylene/butadiene copolymer obtained using said method
US20120101017A1 (en) * 2010-10-25 2012-04-26 Akhilesh Duggal Lubricant additive
WO2017093654A1 (en) 2015-12-03 2017-06-08 Compagnie Generale Des Etablissements Michelin Catalytic preform system comprising a rare earth metallocene
WO2018020122A1 (en) 2016-07-25 2018-02-01 Compagnie Generale Des Etablissements Michelin Preformed catalytic system comprising a rare-earth metallocene

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050003974A1 (en) * 2003-07-01 2005-01-06 Stuart Briggs Viscosity index improvers for lubricating oil compositions
WO2007054224A2 (en) 2005-11-09 2007-05-18 Societe De Technologie Michelin Borohydride metallocene complex of a lanthanide, catalytic system including said complex, polymerisation method using same and ethylene/butadiene copolymer obtained using said method
US20120101017A1 (en) * 2010-10-25 2012-04-26 Akhilesh Duggal Lubricant additive
WO2017093654A1 (en) 2015-12-03 2017-06-08 Compagnie Generale Des Etablissements Michelin Catalytic preform system comprising a rare earth metallocene
WO2018020122A1 (en) 2016-07-25 2018-02-01 Compagnie Generale Des Etablissements Michelin Preformed catalytic system comprising a rare-earth metallocene

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LLAURO ET AL., MACROMOLECULES, vol. 34, 2001, pages 6304 - 6311

Also Published As

Publication number Publication date
FR3130838B1 (en) 2023-12-22
WO2023117456A1 (en) 2023-06-29

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