EP1046699B1 - L'utilisation des fluides fonctionnels non toxiques et biodégradables pour véhicules automobiles - Google Patents

L'utilisation des fluides fonctionnels non toxiques et biodégradables pour véhicules automobiles Download PDF

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Publication number
EP1046699B1
EP1046699B1 EP00401044A EP00401044A EP1046699B1 EP 1046699 B1 EP1046699 B1 EP 1046699B1 EP 00401044 A EP00401044 A EP 00401044A EP 00401044 A EP00401044 A EP 00401044A EP 1046699 B1 EP1046699 B1 EP 1046699B1
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use according
toxic
biodegradable
agents
weight
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German (de)
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EP1046699A1 (fr
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Bernard Criqui
Tom Linnemann
Gérard Desplanches
Mathias Woydt
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Renault SAS
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Renault SAS
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Definitions

  • the invention relates to the use of non-toxic and biodegradable motor vehicle functional fluids obtained by adding nontoxic and biodegradable functional additives to base fluids of the copolymer type of ethylene oxide and propylene oxide.
  • Each motor vehicle currently contains a variety of fluids that perform various functions such as engine and / or gear lubricating oils, hydraulic oils such as power steering oil, brake fluid or shock absorber fluid, and the coolant.
  • patent application DE A 196 47 554 discloses a refrigerating and lubricating fluid for life of an internal combustion engine consisting of a carrier fluid based on a copolymer of ethylene oxide and propylene oxide having a average molar mass between 300 and 700 and a weight ratio EO / PO between 30/70 and 70/30, and a mixture of additives.
  • the base fluid has a rapid biodegradability greater than 90% and an absence of ecological toxicity.
  • the patent application EP 0 572 866 discloses ecological and biodegradable functional fluids, consisting of a biodegradable base fluid, preferably selected from polyol esters, and non-toxic additives not presenting ecological risks.
  • the patent US 5,401,428 discloses water-soluble and biodegradable fluids for machining ferrous and non-ferrous metals comprising polyaspartic acid as a biodegradable antioxidant.
  • the patent WO 97/30137 (corresponding to DE 196 05 162 ) (Elf Antar) discloses a lubricating composition consisting of at least 70% by weight of at least one C 2-5 monoalkylene glycol , and up to 30% of a mixture of additives. This composition may also contain a small proportion, especially from 0 to 15% by weight, of a polyalkylene glycol having a molar mass of less than 5000.
  • the upper limit of the temperature of use of these lubricants is at most 165 ° C.
  • a large part of the additives contained in these lubricants are also toxic and not very biodegradable.
  • Applicant has now discovered that it is possible to overcome the problems related to the ecotoxicity and recycling of lubricants, hydraulic fluids and coolants of the prior art by using ethylene oxide copolymers and propylene oxide as the sole base fluid for the various functional fluids and adding only nontoxic and rapidly biodegradable additives in a reduced amount.
  • the subject of the present invention is therefore the use of copolymers of ethylene oxide (EO) and of propylene oxide (PO) as the sole and same basic fluid for the manufacture of the various functional fluids of motor vehicles by addition of suitable non-toxic and biodegradable functional additives.
  • EO ethylene oxide
  • PO propylene oxide
  • a functional fluid for a motor vehicle containing a base fluid consisting of copolymers of ethylene oxide (EO) and propylene oxide (PO), and various non-toxic and biodegradable functional additives.
  • EO ethylene oxide
  • PO propylene oxide
  • Copolymers of ethylene oxide and propylene oxide (hereinafter referred to as EO / PO copolymers) used as base fluid for the manufacture of functional liquids are random copolymers containing from 30 to 90% by weight of units derived from ethylene oxide and from 70 to 10% by weight of units derived from propylene oxide and having a weight average molecular weight of between 300 and 1200.
  • the rapid biodegradability (according to CEC L-33-A-94) of these fluids is greater than 70%, and sometimes even greater than 80%.
  • copolymers have a good lubricating power that can be attributed to the formation of strongly adsorbed films on the surface of the parts subjected to friction. They also have a very low pour point, below -20 ° C or even below -30 ° C. Their cooling capacity is better than that of mineral oils.
  • the above-described molecules used according to the present invention as the base fluid for automotive functional liquids should have low volatility. In the field of engines, this volatility is evaluated by measuring the loss of mass by evaporation at high temperature. This loss of mass is determined in Europe by means of the Noack test, of German origin (NF T 60-161, CEC L-40-A-93, DIN 51-581), which consists in heating 65 g of oil at 250 ° C for 1 hour under a vacuum of 20 mm of water.
  • the base fluids namely the EO / PO copolymers used according to the present invention must have a volatility (Noack) of less than 7% and preferably less than 4%.
  • the base fluids according to the invention must have a sufficiently low pour point.
  • Flow point in English: for point ) means the lowest temperature at which the oil still flows when it is cooled, without agitation, under standardized conditions (NF). T 60-105 / ASTM D 97 / ISO 3016).
  • the EO / PO copolymers and the neopolyol fatty-chain esters forming the base fluids used according to the present invention must have a pour point of less than -20 ° C, and preferably less than -30 ° C, or even lower at -40 ° C.
  • the object of the present invention is to solve the problems of ecotoxicity and recycling posed by the functional liquids of motor vehicles of the prior art. For this it proposes the use of non-toxic and biodegradable base fluids described above in combination with additives also non-toxic and biodegradable.
  • the additives used for the production of the various functional fluids are chosen from antioxidants, anti-corrosion / anti-rust agents, pH-regulating agents (buffers), anti-wear agents, anti-hydrolysis agents, agents dispersants and anti-foam agents, all non-toxic and biodegradable.
  • the non-toxic and biodegradable anti-oxidizing agents are chosen from zinc dialkyldithiocarbamates, alkyl dithiocarbamates such as methyl dithiocarbamate, vitamin E (tocopherol) and derivatives thereof, sterically hindered phenols such as 2,6-di- tert -butyl-4-methylphenol or similar hindered phenols wherein the methyl group at the 4-position is replaced by a higher aliphatic alkyl group, and the dialkyl trisulfides.
  • the non-toxic and biodegradable anti-corrosion / anti-rust agents are chosen from succinic acid derivatives such as alkylsuccinic and partial esters of succinic acid, and neutral alkylbenzenesulfonates calcium.
  • Polyaspartic acid is a peptide polymer of aspartic acid capable of fulfilling both the functions of dispersing agent, buffering agent (pH regulator) and antiwear agent. It is preferable to use a polyaspartic acid having a weight average molecular weight of between 1000 and 10,000.
  • Non-toxic and biodegradable anti-foam agents are for example chosen from polydimethylsiloxanes.
  • antiwear agents are, for example, zinc dialkyldithiocarbamates, sulphurized olefins, sulfurized unsaturated fatty acid esters, sulphured jojoba oil and vegetable oils which can be sulphidated by trapping and transfer of sulfur from fuel.
  • the amounts of these various additives will of course depend on the nature of the base fluid and the role of the additive.
  • the oxidizing agent (s) are used in a proportion of 0.2 to 3% by weight
  • the anti-corrosion / anti-rust agent (s) are present in a proportion of 0.05 to 1% by weight
  • on or anti-wear agents, if present, are added at the rate of 0.1 to 2% by weight
  • the polyaspartic acid is present in a proportion of 0.3 to 3% by weight
  • the anti-foaming agent (s) are present in an amount of less than 0.02% by weight
  • the Anti-hydrolysis agents are present in a proportion of 0.2 to 2% by weight, all these values being related to the base fluid.
  • the total amount of functional additives added will depend on the chemical nature of the base fluid and the application of the final functional fluid. It is generally between 1 and 20% by weight, preferably between 2 and 12% by weight relative to the base fluid.
  • the functional fluid produced by adding nontoxic and biodegradable functional additives to copolymers of ethylene oxide and propylene oxide may be for example a motor oil, a gear oil, an oil for automatic transmission, an oil for power steering, a hydraulic fluid for dampers, a brake fluid or a coolant.

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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)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Lubricants (AREA)

Description

  • L'invention concerne l'utilisation des fluides fonctionnels non toxiques et biodégradables pour véhicules automobiles obtenus par adjonction d'additifs fonctionnels non toxiques et biodégradables à des fluides de base de type copolymère d'oxyde d'éthylène et d'oxyde de propylène.
  • Chaque véhicule automobile contient actuellement une variété de fluides remplissant différentes fonctions telles que les huiles lubrifiantes de moteur et/ou d'engrenage, les huiles hydrauliques telles que l'huile pour direction assistée, le liquide de freins ou le fluide d'amortisseurs, et le liquide de refroidissement.
  • Lors de la mise hors d'usage définitive d'un véhicule, tous ces fluides doivent être retirés à 95 % et mis en décharge dans des conteneurs séparés ou recyclés séparément ce qui entraîne des coûts importants.
  • Parmi ces fluides fonctionnels, le plus problématique d'un point de vue écologique est sans doute l'huile moteur. En effet, les lubrifiants actuels utilisent majoritairement des huiles de base minérales (paraffiniques ou naphténiques) ou synthétiques peu ou pas biodégradables. Pour satisfaire les exigences d'un cahier de charges ou d'une norme de lubrifiant, on ajoute à cette huile de base un ensemble d'additifs ayant des fonctions bien précises. On peut indiquer à titre d'exemple de tels additifs
    • les inhibiteurs de la corrosion/rouille des pièces métalliques du moteur,
    • les agents anti-usure (AW) et extrême-pression (EP) réduisant le frottement par réaction chimique avec la surface métallique,
    • les agents dispersants assurant la dispersion et l'évacuation de contaminants solides insolubles,
    • les agents détergents évitant la formation de dépôt à la surface des pièces métalliques par dissolution des produits secondaires d'oxydation ou de la combustion,
    • les agents augmentant l'indice de viscosité (VI), c'est-à-dire réduisant la diminution de la viscosité du lubrifiant en fonction de la température,
    • les agents anti-oxydation inhibant la dégradation par oxydation du lubrifiant, et
    • les agents abaissant le point d'écoulement.
  • La plupart de ces additifs présentent des problèmes de toxicité et ne sont pas biodégradables ou sont cancérigènes.
  • Ainsi, les huiles moteur actuelles posent un sérieux problème pour la protection de l'environnement car les fuites d'huile, l'émission avec les gaz d'échappement et la non maîtrise de la collecte et du recyclage d'un tonnage élevé d'huiles de vidange (en Allemagne, jusqu'à 20 à 30 % du volume des ventes) sont à l'origine d'une pollution importante.
  • Une approche pour surmonter ces problèmes a consisté à utiliser des fluides de base non écotoxiques et rapidement biodégradables.
  • Ainsi, la demande de brevet DE A 196 47 554 (Daimler Benz et Fragol Industrieschmierstoffe) divulgue un fluide de réfrigération et de lubrification à vie d'un moteur à combustion interne constitué d'un fluide porteur à base d'un copolymère d'oxyde d'éthylène et d'oxyde de propylène ayant une masse molaire moyenne comprise entre 300 et 700 et un rapport en poids EO/PO compris entre 30/70 et 70/30, et d'un mélange d'additifs.
  • Cependant, dans cette demande, seul le fluide de base présente une biodégradabilité rapide supérieure à 90 % et une absence de toxicité écologique.
  • La demande de brevet EP 0 572 866 divulgue des fluides fonctionnels écologiques et biodégradables, constitués d'un fluide de base biodégradable, de préférence choisi parmi les esters de polyols, et d'additifs non-toxiques ne présentant pas de risques écologiques.
  • Le brevet US 5 401 428 divulgue des fluides hydrosolubles et biodégradables pour l'usinage de métaux ferreux et non-ferreux comprenant du poly(acide aspartique) en tant qu'agent anti-oxydant, biodégradable.
  • Le brevet WO 97/30137 (correspondant à DE 196 05 162 ) (Elf Antar) décrit une composition lubrifiante constituée d'au moins 70 % en poids d'au moins un monoalkylèneglycol en C2-5, et jusqu'à 30 % d'un mélange d'additifs. Cette composition peut contenir en outre une faible proportion, notamment de 0 à 15 % en poids, d'un polyalkylèneglycol ayant une masse molaire inférieure à 5000.
  • Cependant, en raison de la volatilité élevée des monoalkylène-glycols, la limite supérieure de température d'utilisation de ces lubrifiants est au plus égale à 165 °C. Une grande partie des additifs contenus dans ces lubrifiants sont par ailleurs toxiques et peu biodégradables.
  • La demanderesse a découvert à présent qu'il était possible de surmonter les problèmes liés à l'écotoxicité et au recyclage des lubrifiants, des fluides hydrauliques et des liquides de refroidissement de l'art antérieur en utilisant des copolymères d'oxyde d'éthylène et d'oxyde de propylène en tant qu'unique fluide de base pour les différents fluides fonctionnels et en y ajoutant uniquement des additifs non toxiques et rapidement biodégradables en une quantité réduite.
  • Cette utilisation d'un même fluide de base permet, lors de la mise hors d'usage définitive du véhicule, de mettre en décharge avec un seul numéro de déchet ou de retraiter conjointement l'ensemble des fluides fonctionnels fabriqués à partir de celui-ci.
  • Par ailleurs, l'utilisation d'additifs exclusivement non toxiques et biodégradables résout par ailleurs le problème des nuisances écologiques en cas de fuites accidentelles ou de négligences de récupération des fluides.
  • La présente invention a donc pour objet l'utilisation de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) en tant que seul et même fluide de base pour la fabrication des différents fluides fonctionnels de véhicules automobiles par adjonction d'additifs fonctionnels appropriés non toxiques et biodégradables.
  • Elle a également pour objet un fluide fonctionnel pour véhicule automobile contenant un fluide de base constitué de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO), et différents additifs fonctionnels non toxiques et biodégradables.
  • Les copolymères d'oxyde d'éthylène et d'oxyde de propylène (appelés ci-après copolymères EO/PO) utilisés en tant que fluide de base pour la fabrication de liquides fonctionnels sont des copolymères statistiques contenant de 30 à 90 % en poids de motifs dérivés d'oxyde d'éthylène et de 70 à 10 % en poids de motifs dérivés d'oxyde de propylène et ayant une masse molaire moyenne en poids comprise entre 300 et 1200.
  • Ces fluides de base, du fait de leur structure macromoléculaire, ont des indices de viscosité élevés, généralement compris entre 140 et 220, qui rendent superflue l'addition d'additifs ayant pour fonction l'augmentation de l'indice de viscosité.
  • La bonne miscibilité avec l'eau de ces fluides permet de se passer d'additifs dispersants et/ou détergents lors de la formulation de lubrifiants.
  • La biodégradabilité rapide (selon CEC L-33-A-94) de ces fluides est supérieure à 70 %, voire même parfois supérieure à 80 %.
  • Ces copolymères ont un bon pouvoir lubrifiant que l'on peut attribuer à la formation de films solidement adsorbés à la surface des pièces soumises au frottement. Ils ont également un point d'écoulement très bas, inférieur à -20 °C voire même inférieur à -30 °C. Leur pouvoir réfrigérant est meilleur que celui des huiles minérales.
  • Les molécules décrites ci-dessus utilisées selon la présente invention comme fluide de base pour liquides fonctionnels de véhicules automobiles doivent avoir une volatilité faible. Dans le domaine des moteurs, cette volatilité est évaluée par mesure de la perte de masse par évaporation à haute température. Cette perte de masse est déterminée en Europe au moyen de l'essai Noack, d'origine allemande (NF T 60-161, CEC L-40-A-93, DIN 51-581), qui consiste à chauffer 65 g d'huile à 250 °C pendant 1 heure sous dépression d'air de 20 mm d'eau.
  • Les fluides de base, à savoir les copolymères EO/PO, utilisés selon la présente invention doivent avoir une volatilité (Noack) inférieure à 7 % et de préférence inférieure à 4 %.
  • Par ailleurs, comme indiqué ci-dessus à propos des copolymères EO/PO, les fluides de base selon l'invention doivent avoir un point d'écoulement suffisamment bas. On entend par point d'écoulement (en anglais : pour point) la plus basse température à laquelle l'huile coule encore lorsqu'elle est refroidie, sans agitation, dans des conditions normalisées (NF T 60-105/ASTM D 97/ISO 3016).
  • Les copolymères EO/PO et les esters à chaînes grasses de néopolyols formant les fluides de base utilisés selon la présente invention doivent avoir un point d'écoulement inférieur à -20 °C, et de préférence inférieur à -30 °C, voire même inférieure à -40 °C.
  • La présente invention s'est fixé pour but de résoudre les problèmes d'écotoxicité et de recyclage que posent les liquides fonctionnels de véhicules automobiles de l'art antérieur. Pour cela elle propose l'utilisation des fluides de base non toxiques et biodégradables décrits ci-dessus en association avec des additifs également non toxiques et biodégradables.
  • Les propriétés physico-chimiques intéressantes des fluides de base non additivés décrits ci-dessus, telles que leur indice de viscosité élevé, leur bas point d'écoulement et leur bon pouvoir lubrifiant permettent d'éviter l'utilisation d'additifs ayant pour fonction l'amélioration dedites propriétés (additifs anti-usure/extrême pression, abaisseurs de point d'écoulement et agent augmentant l'indice de viscosité).
  • Les additifs utilisés pour la fabrication des différents fluides fonctionnels sont choisis parmi les agents antioxydants, les agents anti-corrosion/anti-rouille, les agents régulateurs de pH (tampon), les agents anti-usure, les agents anti-hydrolyse, les agents dispersants et les agents anti-mousse, tous non toxiques et biodégradables.
  • Les agents anti-oxydants non toxiques et biodégradables sont choisis parmi les dialkyldithiocarbamates de zinc, les dithiocarbamates d'alkyle tels que le dithiocarbamate de méthyle, la vitamine E (tocophérol) et les dérivés de celle-ci, les phénols stériquement encombrés tels que le 2,6-di-tert-butyl-4-méthyl-phénol ou des phénols encombrés similaires dans lesquels le groupe méthyle en position 4 est remplacé par un groupe alkyle aliphatique supérieur, et les trisulfures de dialkyle.
  • Les agents anti-corrosion/anti-rouille non toxiques et biodégradables sont choisis parmi les dérivés d'acide succinique tels que les acides alkylsucciniques et les esters partiels d'acide succinique, et les alkylbenzènesulfonates de calcium neutres.
  • Le poly(acide aspartique) est un polymère peptidique d'acide aspartique capable de remplir à la fois les fonctions d'agent dispersant, d'agent tampon (régulateur de pH) et d'agent anti-usure. On utilisera de préférence un poly(acide aspartique) ayant une masse molaire moyenne en poids comprise entre 1000 et 10 000.
  • Les agents anti-mousse non toxiques et biodégradables sont par exemple choisis parmi les polydiméthylsiloxanes.
  • Bien que, pour la plupart des applications, l'addition d'agents anti-usure ne soit pas nécessaire, elle peut s'avérer utile dans la formulation d'huiles de moteur ou d'engrenage. Des agents anti-usure appropriés sont par exemple les dialkyldithiocarbamates de zinc, des oléfines sulfurées, des esters d'acides gras insaturés sulfurés, l'huile de jojoba sulfurée et des huiles végétales susceptibles d'être sulfurées par piégeage et transfert de soufre en provenance du carburant.
  • Cette liste d'additifs n'est bien entendu pas exhaustive et peut être allongée selon les cahiers de charge des différents fluides fonctionnels que l'on souhaite fabriquer à condition d'utiliser uniquement des additifs fonctionnels non toxiques et biodégradables.
  • Les quantités de ces différents additifs dépendront bien entendu de la nature du fluide de base et du rôle de l'additif. De manière générale, le ou les agents oxydants sont utilisés à raison de 0,2 à 3 % en poids, le ou les agents anti-corrosion/anti-rouille sont présents à raison de 0,05 à 1 % en poids, le ou les agents anti-usure, si présents, sont ajoutés à raison de 0,1 à 2 % en poids, le polyacide aspartique est présent à raison de 0,3 à 3 % en poids, le ou les agents anti-mousses sont présents en une quantité inférieure à 0,02 % en poids et le ou les agents anti-hydrolyse sont présents à raison de 0,2 à 2 % en poids, toutes ces valeurs étant rapportées au fluide de base.
  • De la même façon, la quantité totale d'additifs fonctionnels ajoutés dépendra de la nature chimique du fluide de base et de l'application du fluide fonctionnel final. Elle est généralement comprise entre 1 et 20 % en poids, de préférence entre 2 et 12 % en poids rapporté au fluide de base.
  • Le fluide fonctionnel fabriqué par adjonction d'additifs fonctionnels non toxiques et biodégradables à des copolymères d'oxyde d'éthylène et d'oxyde de propylène, peut être par exemple une huile moteur, une huile d'engrenage, une huile pour transmission automatique, une huile pour direction assistée, un fluide hydraulique pour amortisseurs, un liquidé de frein ou un liquide de refroidissement.

Claims (11)

  1. Utilisation, pour l'ensemble des fluides fonctionnels d'un véhicule automobile, d'un seul et même fluide de base comprenant un copolymère d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) de masse molaire moyenne en poids comprise entre 300 et 1200 et ayant un rapport en poids EO/PO compris entre 30/70 et 90/10 une volatilité (volatilité Noack mesurée selon DIN 51581) inférieure à 7 %, un indice de viscosité supérieur à 140, un point d'écoulement inférieur à -20 °C et une biodégradabilité selon CEC L-33-A-94 supérieure à 70 %, additionné d'un ou de plusieurs additifs fonctionnels non toxiques et biodégradables appropriés à la fonction spécifique.
  2. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que lesdits copolymères EO/PO ont une volatilité (volatilité Noack mesurée selon DIN 51581) inférieure à 4 %.
  3. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que lesdits copolymères EO/PO ont un point d'écoulement inférieur à -30 °C, et tout particulièrement inférieur à -40 °C.
  4. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que lesdits additifs fonctionnels sont choisis parmi les agents antioxydants, les agents anti-corrosion/anti-rouille, les agents régulateurs de pH (tampon), les agents anti-usure, les agents anti-hydrolyse, les agents anti-mousse et les agents dispersants, tous non toxiques et biodégradables.
  5. Utilisation selon la revendication 4, caractérisée par le fait que les agents anti-oxydants non toxiques et biodégradables sont choisis parmi les dialkyldithiocarbamates de zinc, les thiocarbamates d'alkyle tels que le dithiocarbamate de méthyle, la vitamine E (tocophérol) et les dérivés de celle-ci, les phénols stériquement encombrés tels que le 2,6-di-tert-butyl-4-méthyl-phénol ou des phénols encombrés similaires dans lesquels le groupe méthyle en position 4 est remplacé par un groupe alkyle aliphatique supérieur, et les trisulfures de dialkyle.
  6. Utilisation selon la revendication 4, caractérisée par le fait que le ou les agents anti-corrosion/anti-rouille non toxiques et biodégradables sont choisis parmi les dérivés d'acide succinique tels que les acides alkylsucciniques et les esters partiels d'acide succinique, et les alkylbenzènesulfonates de calcium neutres.
  7. Utilisation selon la revendication 4, caractérisée par le fait que l'on utilise comme agent dispersant, agent tampon (régulateur de pH) et agent anti-usure un poly(acide aspartique) ayant une masse molaire moyenne en poids comprise entre 1000 et 10 000.
  8. Utilisation selon la revendication 4, caractérisée par le fait que l'on utilise comme agent anti-usure des dialkyldithiocarbamates de zinc, des oléfines sulfurées, des esters d'acides gras insaturés sulfurées, l'huile de jojoba sulfurée et des huiles végétales susceptibles d'être sulfurées par piégeage et transfert de soufre en provenance du carburant.
  9. Utilisation selon la revendication 4, caractérisée par le fait que le ou les agents anti-mousse non toxiques et biodégradables sont choisis parmi les polydiméthylsiloxanes.
  10. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que la teneur en additifs fonctionnels non toxiques et biodégradables des liquides fonctionnels préparés à partir du liquide de base est comprise entre 1 et 20 % en poids, de préférence entre 2 et 12 % en poids rapporté au fluide de base.
  11. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que lesdits fluides fonctionnels préparés sont choisis parmi l'huile moteur, l'huile d'engrenage, l'huile pour transmission automatique, l'huile pour direction assistée, le fluide hydraulique pour amortisseurs, le liquide de frein et le liquide de refroidissement.
EP00401044A 1999-04-19 2000-04-14 L'utilisation des fluides fonctionnels non toxiques et biodégradables pour véhicules automobiles Expired - Lifetime EP1046699B1 (fr)

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FR9904900A FR2792326B1 (fr) 1999-04-19 1999-04-19 Fluides fonctionnels non toxiques et biodegradables a base de copolymeres d'oxyde d'ethylene et d'oxyde de propylene pour vehicules automobiles
FR9904900 1999-04-19

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WO2009074664A1 (fr) * 2007-12-12 2009-06-18 Shell Internationale Research Maatschappij B.V. Composition d'huile de graissage
CA2722431C (fr) 2008-04-28 2016-08-02 Dow Global Technologies Inc. Composition de lubrifiant a base de polyalkyleneglycol
JP2014511913A (ja) 2011-03-23 2014-05-19 ダウ グローバル テクノロジーズ エルエルシー ポリアルキレングリコール系伝熱流体及び単一流体のエンジンオイル
BR112013033745A2 (pt) 2011-03-29 2017-02-07 Dow Global Technologies Inc composição lubrificante e método para lubrificar um motor de combustão interna
CN103525531A (zh) * 2013-09-27 2014-01-22 奥克化学扬州有限公司 一种用于蓝宝石晶体掏棒的冷却液

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US3876550A (en) * 1974-04-15 1975-04-08 Lubrizol Corp Lubricant compositions
DE4217961A1 (de) * 1992-05-30 1993-12-02 Fuchs Petrolub Ag Oel & Chemie Umweltverträgliche und biologisch schnell aubbaubare Betriebsstoffe zur Umlaufschmierung von Motoren und sonstigen Aggregaten in Fahrzeugen und Arbeitsmaschinen
US5401428A (en) * 1993-10-08 1995-03-28 Monsanto Company Water soluble metal working fluids
DE19647554A1 (de) * 1996-11-16 1998-05-28 Daimler Benz Ag Funktionsflüssigkeit für lebensdauergeschmierte Verbrennungsmotoren

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