EP1046699A1 - Non-toxic, biodegradable functional fluids for motor vehicles - Google Patents

Non-toxic, biodegradable functional fluids for motor vehicles Download PDF

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Publication number
EP1046699A1
EP1046699A1 EP00401044A EP00401044A EP1046699A1 EP 1046699 A1 EP1046699 A1 EP 1046699A1 EP 00401044 A EP00401044 A EP 00401044A EP 00401044 A EP00401044 A EP 00401044A EP 1046699 A1 EP1046699 A1 EP 1046699A1
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EP
European Patent Office
Prior art keywords
toxic
biodegradable
functional
fluid
base fluid
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
EP00401044A
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German (de)
French (fr)
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EP1046699B1 (en
Inventor
Bernard Criqui
Tom Linnemann
Gérard Desplanches
Mathias Woydt
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Renault SAS
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Renault SAS
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    • 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
    • C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
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    • C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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Definitions

  • the invention relates to non-toxic functional fluids and biodegradable for motor vehicles obtained by addition non-toxic and biodegradable functional additives to base type copolymer of ethylene oxide and propylene oxide or esters with fatty chains of neopolyols.
  • Each motor vehicle currently contains a variety fluids fulfilling different functions such as lubricating oils engine and / or gear, hydraulic oils such as oil for power steering, brake fluid or shock absorber fluid, and coolant.
  • Patent application DE A 196 47 554 discloses a refrigeration fluid and lifetime lubrication of an internal combustion engine consisting of a fluid carrier based on a copolymer of ethylene oxide and propylene oxide having an average molar mass of between 300 and 700 and a EO / PO weight ratio between 30/70 and 70/30, and a mixture additives.
  • WO 97/30137 (corresponding to DE 196 05 162) (Elf Antar) describes a lubricating composition consisting of at least 70% by weight of at least one C 2-5 monoalkylene glycol , and up to 30% d '' a mixture of additives. This composition may also contain a small proportion, in particular from 0 to 15% by weight, of a polyalkylene glycol having a molar mass of less than 5000.
  • the upper temperature limit for the use of these lubricants is at most equal to 165 ° C.
  • a large part of the additives contained in these lubricants are also toxic and not very biodegradable.
  • This use of the same basic fluid allows, when putting out of final use of the vehicle, to landfill with a single waste number or jointly reprocess all fluids functional made from it.
  • the present invention therefore relates to the use of copolymers ethylene oxide (EO) and propylene oxide (PO) or esters with fatty neopolyol chains as one and the same base fluid for the manufacture of various functional fluids for motor vehicles by adding suitable non-toxic and biodegradable functional additives.
  • EO ethylene oxide
  • PO propylene oxide
  • esters with fatty neopolyol chains as one and the same base fluid for the manufacture of various functional fluids for motor vehicles by adding suitable non-toxic and biodegradable functional additives.
  • a functional fluid for vehicle automotive containing a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) or fatty chain esters neopolyols above, and various non-toxic functional additives and biodegradable.
  • EO oxide copolymers ethylene
  • PO propylene oxide
  • fatty chain esters neopolyols neopolyols
  • Copolymers of ethylene oxide and propylene oxide (hereinafter called EO / PO copolymers) used as base fluid for the production of functional liquids are random copolymers containing 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 molar mass of between 300 and 1,200.
  • the rapid biodegradability (according to CEC L-33-A-94) of these fluids is greater than 70%, or even sometimes greater than 80%.
  • copolymers have a good lubricity which can be attribute to the formation of solidly adsorbed films on the surface of the parts subject to friction. They also have a very pour point low, below -20 ° C or even below -30 ° C. Their cooling power is better than that of mineral oils.
  • the other group of compounds used according to the present invention as base fluid for motor vehicle functional liquids includes various fatty chain esters of neopolyols.
  • neopolyols means alcohols containing at least three hydroxyl functions and having a neopentyl structure, that is to say a structure characterized by the absence of a hydrogen atom on the carbon atom in the ⁇ position of the carbons bearing hydroxyl functions. This absence of a hydrogen atom in position has alcoholic functions is of paramount importance because it gives the esters of these polyols a very high chemical stability, in particularly high stability to hydrolysis.
  • neopolyols at the base of fatty chain esters include for example neopentylglycol (diol), trimethylolpropane (triol), pentaerythritol (tetraol) and dipentaerythritol (hexaol).
  • polyols are esterified with long chain monoacids, that is to say C 8-36 fatty acids, with linear or branched chain, saturated or unsaturated, but preferably saturated, or with mixtures of such fatty acids .
  • the esterification can be partial or complete. However, for obtain sufficient kinematic viscosity and a flash point fairly high, at least two hydroxyl functions must be esterified by fatty acids.
  • Suitable saturated fatty acids caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, and branched isomeric forms of these.
  • Fatty acids can also have one or more double bonds, but these unsaturations are potential oxidation sites and affect the chemical stability of base fluids.
  • the number of ethylenic unsaturations of the esters can be characterized by the iodine index, that is to say by the number of grams of iodine (I 2 ) which can be fixed per 100 g of material.
  • the iodine index must be less than 10 and preferably less than 1.
  • the fatty chain esters of neopolyols used as the base fluid in the present invention have a viscosity index at least 140.
  • the basic fluids namely EO / PO copolymers or esters with fatty chains of neopolyols, used according to the present invention must have a volatility (Noack) of less than 7% and preferably less at 4%.
  • pour point in English: for point
  • pour point is meant the lowest temperature at which the oil still flows when it is cooled, without stirring, under standardized conditions (NF T 60-105 / ASTM D 97 / ISO 3016).
  • EO / PO copolymers and fatty chain esters of neopolyols forming the basic fluids used according to the present invention must have a pour point below -20 ° C, and preferably below at -30 ° C, or even lower than -40 ° C.
  • the present invention aims to solve the problems ecotoxicity and recycling posed by functional liquids prior art motor vehicles. For this it offers the use non-toxic and biodegradable base fluids described above in combination with additives that are also non-toxic and biodegradable.
  • Additives used for the production of different fluids functional are chosen from antioxidants, anti-corrosion / anti-rust agents, pH regulating agents (buffer), agents anti-wear, anti-hydrolysis agents, dispersing agents and agents anti-foam, all non-toxic and biodegradable.
  • the non-toxic and biodegradable antioxidants 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-methyl-phenol or similar hindered phenols in which the methyl group in position 4 is replaced by a higher aliphatic alkyl group, and the dialkyl trisulphides.
  • Non-toxic and biodegradable anti-corrosion / anti-rust agents are chosen from succinic acid derivatives such as acids alkyl succinics and partial esters of succinic acid, and alkyl benzenesulfonates neutral calcium.
  • Poly (aspartic acid) is a peptide polymer of acid aspartic capable of performing both the functions of dispersing agent, buffer agent (pH regulator) and antiwear agent.
  • a poly (aspartic acid) having an average molar mass in weight between 1000 and 10 000.
  • the basic fluid is a neopolyol ester
  • an agent to protect it against hydrolysis.
  • Such agents non-toxic and biodegradable are for example the carbodiimides sterically crowded.
  • Non-toxic and biodegradable defoaming agents are example chosen from polydimethylsiloxanes.
  • anti-wear agents are for example zinc dialkyldithiocarbamates, sulfurized olefins, esters of sulfurized unsaturated fatty acids, sulfurized jojoba oil and vegetable oils capable of being sulfurized by trapping and transfer sulfur from the fuel.
  • the quantities of these various additives will of course depend the nature of the base fluid and the role of the additive.
  • the oxidizing agent (s) are used in an amount of 0.2 to 3% by weight
  • the or anti-corrosion / anti-rust agents are present at 0.05 to 1% by weight
  • the anti-wear agent (s), if present, are added at a rate of 0.1 to 2% by weight
  • the polypartic acid is present at a rate of 0.3 to 3% by weight
  • the anti-foaming agent (s) are present in a lower amount at 0.02% by weight
  • the anti-hydrolysis agent (s) are present at 0.2 to 2% by weight, all these values being related to the fluid basic.
  • 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 fluid based.
  • the functional fluid produced by adding functional additives non-toxic and biodegradable to oxide copolymers ethylene and propylene oxide or neopolyol esters can be e.g. engine oil, gear oil, gear oil automatic transmission, power steering oil, fluid hydraulic for shock absorbers, brake fluid or coolant.
  • the functional fluid of the present invention when it is an engine oil, is preferably used in engines whose parts friction - based on new ceramic or composite materials or surface treated with triboactive coatings - are less subject to wear by friction than metallic mechanical parts conventional internal combustion engines.
  • the functional fluids used as engine oil allow lifetime or long term lubrication engine term because of functions conventionally assumed by additives gradually consumed (increase in the viscosity index and anti-wear) are now filled with the base liquid which is available in unlimited quantity.

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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)

Abstract

Base fluids which are non-toxic and biodegradable are proposed to fulfill the properties of functional fluids used in automobiles, including engine and gear lubrication, hydraulic oils and coolants, with appropriate biodegradable additives. The use of one base fluid comprising an ethylene oxide(EO)/propylene oxide(PO) copolymer of mean molecular weight 300-1200 an EO/PO ratio of 30-70 to 90-10 for different functional automobile fluids is claimed. One or more non-toxic and biodegradable additives appropriate to the function required, are included. An alternative fluid based on neopolyol fatty esters is also propo An Independent claim is also included for functional fluid compositions based on these materials.

Description

L'invention concerne 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 ou de type esters à chaínes grasses de néopolyols.The invention relates to non-toxic functional fluids and biodegradable for motor vehicles obtained by addition non-toxic and biodegradable functional additives to base type copolymer of ethylene oxide and propylene oxide or esters with fatty chains of neopolyols.

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.Each motor vehicle currently contains a variety fluids fulfilling different functions such as lubricating oils engine and / or gear, hydraulic oils such as oil for power steering, brake fluid or shock absorber fluid, and coolant.

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 entraíne des coûts importants.When a vehicle is permanently put out of use, all of these fluids should be 95% removed and landfilled in containers separated or recycled separately which leads to significant costs.

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.
Among these functional fluids, the most problematic from an ecological point of view is undoubtedly engine oil. Indeed, current lubricants mainly use mineral base oils (paraffinic or naphthenic) or synthetic little or not biodegradable. To meet the requirements of a specification or a lubricant standard, a set of additives with very specific functions are added to this base oil. By way of example, such additives can be indicated
  • corrosion / rust inhibitors of metallic engine parts,
  • anti-wear (AW) and extreme pressure (EP) agents reducing friction by chemical reaction with the metal surface,
  • dispersing agents ensuring the dispersion and removal of insoluble solid contaminants,
  • detergent agents preventing the formation of deposits on the surface of metal parts by dissolution of secondary oxidation or combustion products,
  • agents increasing the viscosity index (VI), that is to say reducing the decrease in the viscosity of the lubricant as a function of the temperature,
  • anti-oxidation agents inhibiting degradation by oxidation of the lubricant, and
  • agents lowering the pour point.

La plupart de ces additifs présentent des problèmes de toxicité et ne sont pas biodégradables ou sont cancérigènes.Most of these additives have toxicity problems and are not biodegradable or are carcinogenic.

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 maítrise 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.Today's engine oils are a serious problem for environmental protection because oil leaks, the emission with exhaust gases and lack of control over collection and recycling a high tonnage of waste oil (in Germany, up to 20 to 30% sales volume) are the source of significant pollution.

Une approche pour surmonter ces problèmes a consisté à utiliser des fluides de base non écotoxiques et rapidement biodégradables.One approach to overcome these problems has been to use non-ecotoxic and rapidly biodegradable base fluids.

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.Patent application DE A 196 47 554 (Daimler Benz and Fragol Industrieschmierstoffe) discloses a refrigeration fluid and lifetime lubrication of an internal combustion engine consisting of a fluid carrier based on a copolymer of ethylene oxide and propylene oxide having an average molar mass of between 300 and 700 and a EO / PO weight ratio between 30/70 and 70/30, and a mixture additives.

Cependant, dans cette demande, seul le fluide de base présente une biodégradabilité rapide supérieure à 90 % et une absence de toxicité écologique.However, in this application, only the base fluid has rapid biodegradability greater than 90% and no toxicity ecological.

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.WO 97/30137 (corresponding to DE 196 05 162) (Elf Antar) describes a lubricating composition consisting of at least 70% by weight of at least one C 2-5 monoalkylene glycol , and up to 30% d '' a mixture of additives. This composition may also contain a small proportion, in particular from 0 to 15% by weight, of a polyalkylene glycol having a molar mass of less than 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.However, due to the high volatility of monoalkylene glycols, the upper temperature limit for the use of these lubricants is at most equal to 165 ° C. A large part of the additives contained in these lubricants are also toxic and not very biodegradable.

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 ou des esters à chaínes grasses de néopolyols 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.The Applicant has now discovered that it is possible to overcoming the problems linked to the ecotoxicity and recycling of lubricants, art hydraulic fluids and coolants previous using copolymers of ethylene oxide and propylene or fatty chain esters of neopolyols as a single base fluid for the various functional fluids and adding only non-toxic and rapidly biodegradable additives in one reduced quantity.

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.This use of the same basic fluid allows, when putting out of final use of the vehicle, to landfill with a single waste number or jointly reprocess all fluids functional made from it.

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.In addition, the use of exclusively non-toxic additives and biodegradable also solves the problem of ecological pollution in the event of accidental leaks or negligence in recovering fluids.

La présente invention a donc pour objet l'utilisation de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) ou d'esters à chaínes grasses de néopolyols 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. The present invention therefore relates to the use of copolymers ethylene oxide (EO) and propylene oxide (PO) or esters with fatty neopolyol chains as one and the same base fluid for the manufacture of various functional fluids for motor vehicles by adding suitable non-toxic and biodegradable functional additives.

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) ou d'esters à chaínes grasses de néopolyols ci-dessus, et différents additifs fonctionnels non toxiques et biodégradables.It also relates to a functional fluid for vehicle automotive containing a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) or fatty chain esters neopolyols above, and various non-toxic functional additives and biodegradable.

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.Copolymers of ethylene oxide and propylene oxide (hereinafter called EO / PO copolymers) used as base fluid for the production of functional liquids are random copolymers containing 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 molar mass of between 300 and 1,200.

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.These basic fluids, because of their macromolecular structure, have high viscosity indices, generally between 140 and 220, which make the addition of additives having the function of increasing viscosity index.

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.The good miscibility with water of these fluids makes it possible to do without dispersant and / or detergent additives during the formulation of lubricants.

La biodégradabilité rapide (selon CEC L-33-A-94) de ces fluides est supérieure à 70 %, voire même parfois supérieure à 80 %.The rapid biodegradability (according to CEC L-33-A-94) of these fluids is greater than 70%, or even sometimes greater than 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.These copolymers have a good lubricity which can be attribute to the formation of solidly adsorbed films on the surface of the parts subject to friction. They also have a very pour point low, below -20 ° C or even below -30 ° C. Their cooling power is better than that of mineral oils.

L'autre groupe de composés utilisés selon la présente invention comme fluide de base pour liquides fonctionnels de véhicules automobiles, englobe différents esters à chaínes grasses de néopolyols.The other group of compounds used according to the present invention as base fluid for motor vehicle functional liquids, includes various fatty chain esters of neopolyols.

On entend par néopolyols selon la présente invention des alcools contenant au moins trois fonctions hydroxyle et ayant une structure néopentylique, c'est-à-dire une structure caractérisée par l'absence d'un atome d'hydrogène sur l'atome de carbone en position α des carbones portant les fonctions hydroxyle. Cette absence d'atome d'hydrogène en position a des fonctions alcools est d'une importance primordiale car elle confère aux esters de ces polyols une très grande stabilité chimique, en particulier une grande stabilité à l'hydrolyse.The term “neopolyols” according to the present invention means alcohols containing at least three hydroxyl functions and having a neopentyl structure, that is to say a structure characterized by the absence of a hydrogen atom on the carbon atom in the α position of the carbons bearing hydroxyl functions. This absence of a hydrogen atom in position has alcoholic functions is of paramount importance because it gives the esters of these polyols a very high chemical stability, in particularly high stability to hydrolysis.

Les néopolyols à la base des esters à chaínes grasses englobent par exemple le néopentylglycol (diol), le triméthylolpropane (triol), le pentaérythritol (tétraol) et le dipentaérythritol (hexaol).The neopolyols at the base of fatty chain esters include for example neopentylglycol (diol), trimethylolpropane (triol), pentaerythritol (tetraol) and dipentaerythritol (hexaol).

Ces polyols sont estérifiés avec des monoacides à longue chaíne, c'est-à-dire des acides gras en C8-36, à chaíne linéaire ou ramifiée, saturée ou insaturée, mais de préférence saturée, ou avec des mélanges de tels acides gras.These polyols are esterified with long chain monoacids, that is to say C 8-36 fatty acids, with linear or branched chain, saturated or unsaturated, but preferably saturated, or with mixtures of such fatty acids .

L'estérification peut être partielle ou complète. Cependant, pour obtenir une viscosité cinématique suffisante et un point d'inflammation assez élevé, au moins deux fonctions hydroxyle doivent être estérifiées par des acides gras.The esterification can be partial or complete. However, for obtain sufficient kinematic viscosity and a flash point fairly high, at least two hydroxyl functions must be esterified by fatty acids.

On peut citer à titre d'exemples d'acides gras saturés appropriés l'acide caprylique, l'acide pélargonique, l'acide caprique, l'acide laurique, l'acide myristique, l'acide palmitique, l'acide stéarique, l'acide arachidique, l'acide béhénique, l'acide lignocérique, l'acide cérotique, et les formes isomères ramifiées de ceux-ci.There may be mentioned as examples of suitable saturated fatty acids caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, and branched isomeric forms of these.

Les acides gras peuvent également comporter une ou plusieurs doubles liaisons, mais ces insaturations sont des sites d'oxydation potentiels et affectent la stabilité chimique des fluides de base.Fatty acids can also have one or more double bonds, but these unsaturations are potential oxidation sites and affect the chemical stability of base fluids.

Le nombre d'insaturations éthyléniques des esters peut être caractérisé par l'indice d'iode, c'est-à-dire par le nombre de grammes d'iode (I2) pouvant être fixés par 100 g matière. Pour garantir une bonne stabilité des esters à chaínes grasses de néopolyols, l'indice d'iode doit être inférieur à 10 et de préférence inférieur à 1. The number of ethylenic unsaturations of the esters can be characterized by the iodine index, that is to say by the number of grams of iodine (I 2 ) which can be fixed per 100 g of material. To guarantee good stability of the fatty chain esters of neopolyols, the iodine index must be less than 10 and preferably less than 1.

La longueur de chaíne, le taux de ramification et le taux d'insaturation des acides gras utilisés influent sur les propriétés physico-chimiques des fluides de base obtenus. Ainsi, un taux de ramification important réduit le point d'écoulement et augmente la résistance à l'hydrolyse.Chain length, branching rate and unsaturation rate fatty acids used influence the physico-chemical properties basic fluids obtained. Thus, a significant branching rate reduces the pour point and increases resistance to hydrolysis.

Des chaínes longues et peu ramifiées conduisent à des indices de viscosité élevés. Les esters à chaínes grasses de néopolyols utilisés comme fluide de base dans la présente invention ont un indice de viscosité au moins égal à 140.Long and little branched chains lead to clues of high viscosity. The fatty chain esters of neopolyols used as the base fluid in the present invention have a viscosity index at least 140.

Comme indiqué ci-dessus, le taux d'insaturation joue un rôle dans la stabilité à l'oxydation. Le choix approprié de l'ensemble de ces paramètres devra se faire en fonction des différents cahiers de charge.As noted above, the rate of unsaturation plays a role in oxidation stability. The appropriate choice of all of these parameters must be done according to the different specifications.

La biodégradabilité rapide (selon CEC L-33-A-94) de ces esters d'acides gras et de néopolyols utilisés comme fluides de base est supérieure à 90 %.The rapid biodegradability (according to CEC L-33-A-94) of these esters fatty acids and neopolyols used as base fluids is superior 90%.

Les deux types de molécules décrits ci-dessus utilisés 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.The two types of molecules described above used according to the present invention as a base fluid for functional liquids of Motor vehicles should have low volatility. In the motors, this volatility is assessed by measuring the loss of mass by high temperature evaporation. 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 of heating 65 g of oil at 250 ° C for 1 hour under air depression of 20 mm of water.

Les fluides de base, à savoir les copolymères EO/PO ou les esters à chaínes grasses de néopolyols, utilisés selon la présente invention doivent avoir une volatilité (Noack) inférieure à 7 % et de préférence inférieure à 4 %.The basic fluids, namely EO / PO copolymers or esters with fatty chains of neopolyols, used according to the present invention must have a volatility (Noack) of less than 7% and preferably less at 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).Furthermore, as indicated above with regard to the EO / PO copolymers, the basic fluids according to the invention must have a sufficiently low pour point. By pour point (in English: for point ) is meant the lowest temperature at which the oil still flows when it is cooled, without stirring, under standardized conditions (NF T 60-105 / ASTM D 97 / ISO 3016).

Les copolymères EO/PO et les esters à chaínes 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.EO / PO copolymers and fatty chain esters of neopolyols forming the basic fluids used according to the present invention must have a pour point below -20 ° C, and preferably below at -30 ° C, or even lower than -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.The present invention aims to solve the problems ecotoxicity and recycling posed by functional liquids prior art motor vehicles. For this it offers the use non-toxic and biodegradable base fluids described above in combination with additives that are also non-toxic and biodegradable.

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).The interesting physico-chemical properties of base non-additives described above, such as their viscosity index high, their low pour point and good lubricity allow avoid the use of additives with the function of improving properties (anti-wear / extreme pressure additives, pressure reducers pour point and agent increasing the viscosity index).

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.Additives used for the production of different fluids functional are chosen from antioxidants, anti-corrosion / anti-rust agents, pH regulating agents (buffer), agents anti-wear, anti-hydrolysis agents, dispersing agents and agents anti-foam, all non-toxic and biodegradable.

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.The non-toxic and biodegradable antioxidants 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-methyl-phenol or similar hindered phenols in which the methyl group in position 4 is replaced by a higher aliphatic alkyl group, and the dialkyl trisulphides.

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.Non-toxic and biodegradable anti-corrosion / anti-rust agents are chosen from succinic acid derivatives such as acids alkyl succinics and partial esters of succinic acid, and alkyl benzenesulfonates neutral calcium.

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.Poly (aspartic acid) is a peptide polymer of acid aspartic capable of performing both the functions of dispersing agent, buffer agent (pH regulator) and antiwear agent. We will use preferably a poly (aspartic acid) having an average molar mass in weight between 1000 and 10 000.

Lorsque le fluide de base est un ester de néopolyol, il est nécessaire d'y ajouter un agent le protégeant contre l'hydrolyse. De tels agents non toxiques et biodégradables sont par exemple les carbodiimides stériquement encombrés.When the basic fluid is a neopolyol ester, it is necessary add an agent to protect it against hydrolysis. Such agents non-toxic and biodegradable are for example the carbodiimides sterically crowded.

Les agents anti-mousse non toxiques et biodégradables sont par exemple choisis parmi les polydiméthylsiloxanes.Non-toxic and biodegradable defoaming agents are example chosen from polydimethylsiloxanes.

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.Although, for most applications, the addition of agents anti-wear is not necessary, it can be useful in the formulation engine or gear oils. Appropriate anti-wear agents are for example zinc dialkyldithiocarbamates, sulfurized olefins, esters of sulfurized unsaturated fatty acids, sulfurized jojoba oil and vegetable oils capable of being sulfurized by trapping and transfer sulfur from the fuel.

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.This list of additives is of course not exhaustive and may be extended according to the specifications of the various functional fluids that we wish to manufacture provided that we only use non-toxic and biodegradable functional additives.

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.The quantities of these various additives will of course depend the nature of the base fluid and the role of the additive. Generally, the oxidizing agent (s) are used in an amount of 0.2 to 3% by weight, the or anti-corrosion / anti-rust agents are present at 0.05 to 1% by weight, the anti-wear agent (s), if present, are added at a rate of 0.1 to 2% by weight, the polypartic acid is present at a rate of 0.3 to 3% by weight, the anti-foaming agent (s) are present in a lower amount at 0.02% by weight and the anti-hydrolysis agent (s) are present at 0.2 to 2% by weight, all these values being related to the fluid basic.

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.Likewise, 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 fluid based.

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 ou à des esters de néopolyols, 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 liquide de frein ou un liquide de refroidissement.The functional fluid produced by adding functional additives non-toxic and biodegradable to oxide copolymers ethylene and propylene oxide or neopolyol esters, can be e.g. engine oil, gear oil, gear oil automatic transmission, power steering oil, fluid hydraulic for shock absorbers, brake fluid or coolant.

Le fluide fonctionnel de la présente invention, lorqu'il s'agit d'une huile moteur, est utilisé de préférence dans des moteurs dont les pièces de friction - à base de nouveaux matériaux de type céramiques ou composites ou traitées en surface avec des revêtements triboactifs - sont moins sujettes à une usure par frottement que des pièces mécaniques métalliques de moteurs à combustion interne habituels.The functional fluid of the present invention, when it is an engine oil, is preferably used in engines whose parts friction - based on new ceramic or composite materials or surface treated with triboactive coatings - are less subject to wear by friction than metallic mechanical parts conventional internal combustion engines.

Dans de tels types de moteurs, les fluides fonctionnels utilisés en tant qu'huile de moteur permettent une lubrification à vie ou à long terme du moteur car des fonctions assumées classiquement par des additifs progressivement consommés (augmentation de l'indice de viscosité et anti-usure) sont remplies à présent par le liquide de base qui est disponible en quantité illimité.In such types of engines, the functional fluids used as engine oil allow lifetime or long term lubrication engine term because of functions conventionally assumed by additives gradually consumed (increase in the viscosity index and anti-wear) are now filled with the base liquid which is available in unlimited quantity.

Claims (17)

Utilisation, pour différents 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, additionné d'un ou de plusieurs additifs fonctionnels non toxiques et biodégradables appropriés à la fonction spécifique.Use, for different functional fluids of a vehicle automotive, of a single base fluid comprising a copolymer ethylene oxide (EO) and propylene oxide (PO) molar mass weight average between 300 and 1200 and having a weight ratio EO / PO between 30/70 and 90/10, added with one or more additives non-toxic and biodegradable functional suitable for the function specific. 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 7 %, de préférence inférieure à 4 %.Use according to any one of the preceding claims, characterized by the fact that said EO / PO copolymers have a volatility (Noack volatility measured according to DIN 51581) less than 7%, preferably less than 4%. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que lesdits copolymères EO/PO ont un indice de viscosité supérieur à 140.Use according to any one of the preceding claims, characterized by the fact that said EO / PO copolymers have a viscosity index greater than 140. Utilisation selon l'une quelconque des revendications précédentes, caractérisée par le fait que lesdits copolymères EO/PO ont un point d'écoulement inférieur à -20 °C, de préférence inférieur à -30 °C, et tout particulièrement inférieur à -40 °C.Use according to any one of the preceding claims, characterized by the fact that said EO / PO copolymers have a pour point below -20 ° C, preferably below -30 ° C, and especially below -40 ° C. 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.Use according to any one of the preceding claims, characterized by the fact that said functional additives are chosen among the antioxidants, anti-corrosion / anti-rust agents, pH regulating agents (buffer), antiwear agents, anti-hydrolysis, anti-foaming agents and dispersing agents, all not toxic and biodegradable. Utilisation selon la revendication 5, 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.Use according to claim 5, characterized in that the non-toxic and biodegradable antioxidants are chosen from zinc dialkyldithiocarbamates, alkyl thiocarbamates such as methyl dithiocarbamate, vitamin E (tocopherol) and derivatives of the latter, sterically hindered phenols such as 2,6-di- tert -butyl-4-methyl-phenol or similar hindered phenols in which the methyl group in position 4 is replaced by a higher aliphatic alkyl group, and the dialkyl trisulphides. Utilisation selon la revendication 5, 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.Use according to claim 5, characterized in that that the non-toxic and biodegradable anti-corrosion / anti-rust agent (s) are chosen from succinic acid derivatives such as acids alkyl succinics and partial esters of succinic acid, and alkyl benzenesulfonates neutral calcium. Utilisation selon la revendication 5, 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.Use according to claim 5, characterized in that used as a dispersing agent, buffering agent (pH regulator) and antiwear agent a poly (aspartic acid) having a molecular weight weight average between 1,000 and 10,000. Utilisation selon la revendication 5, 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.Use according to claim 5, characterized in that which are used as antiwear agent dialkyldithiocarbamates of zinc, sulfurized olefins, sulfurized unsaturated fatty acid esters, sulfurized jojoba oil and vegetable oils likely to be sulfurized by trapping and transfer of sulfur from the fuel. Utilisation selon la revendication 5, caractérisée par le fait que le ou les agents anti-mousse non toxiques et biodégradables sont choisis parmi les polydiméthylsiloxanes.Use according to claim 5, characterized in that that the non-toxic and biodegradable anti-foaming agent (s) are chosen among polydimethylsiloxanes. 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.Use according to any one of the preceding claims, characterized in that the content of functional additives not toxic and biodegradable functional liquids prepared from base liquid is between 1 and 20% by weight, preferably between 2 and 12% by weight based on the base fluid. 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.Use according to any one of the preceding claims, characterized by the fact that said functional fluids prepared are selected from engine oil, gear oil, transmission oil automatic, power steering oil, hydraulic fluid for shock absorbers, brake fluid and coolant. Fluide fonctionel pour véhicule automobile, caractérisé par le fait qu'il contient un fluide de base constitué de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) selon l'une quelconque des revendications 1 à 4, et des additifs fonctionnels non toxiques et biodégradables, dont au moins un agent anti-oxydant choisi parmi le dibutyldithiocarbamate de zinc, les thiocarbamates d'alkyle, la vitamine E (tocophérol) et les dérivés de celle-ci, les phénols stériquement encombrés et les trisulfures de dialkyle, lequel agent antioxydant est présent à raison de 0,2 à 3 % en poids rapporté au fluide de base.Functional fluid for motor vehicle, characterized by the fact that it contains a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) according to any one of claims 1 to 4, and non-toxic and biodegradable functional additives, including at least one antioxidant agent chosen from dibutyldithiocarbamate zinc, alkyl thiocarbamates, vitamin E (tocopherol) and derivatives thereof, sterically hindered phenols and trisulfides dialkyl, which antioxidant is present at 0.2 to 3% by weight based on the base fluid. Fluide fonctionel pour véhicule automobile, caractérisé par le fait qu'il contient un fluide de base constitué de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) selon l'une quelconque des revendications 1 à 4, et des additifs fonctionnels non toxiques et biodégradables, dont au moins un agent anti-corrosion choisi parmi les dérivés d'acide succinique et les alkylbenzènesulfonates de calcium neutres, lequel agent anti-corrosion est présent à raison de 0,05 à 1 % en poids rapporté au fluide de base.Functional fluid for motor vehicle, characterized by the fact that it contains a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) according to any one of claims 1 to 4, and non-toxic and biodegradable functional additives, including at least one anti-corrosion agent chosen from derivatives succinic acid and neutral calcium alkylbenzenesulfonates, which anti-corrosion agent is present in an amount of 0.05 to 1% by weight reported to the base fluid. Fluide fonctionel pour véhicule automobile, caractérisé par le fait qu'il contient un fluide de base constitué de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) selon l'une quelconque des revendications 1 à 6, et des additifs fonctionnels non toxiques et biodégradables, dont un poly(acide aspartique) ayant une masse molaire moyenne en poids comprise entre 1000 et 10 000, et qui est présent à raison de 0,3 à 3 % en poids rapporté au fluide de base.Functional fluid for motor vehicle, characterized by the fact that it contains a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) according to any one of claims 1 to 6, and non-toxic and biodegradable functional additives, of which a poly (aspartic acid) having an average molar mass by weight between 1000 and 10 000, and which is present at a rate of 0.3 to 3 % by weight based on the base fluid. Fluide fonctionel pour véhicule automobile, caractérisé par le fait qu'il contient un fluide de base constitué de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) selon l'une quelconque des revendications 1 à 6, et des additifs fonctionnels non toxiques et biodégradables, dont au moins un agent anti-usure choisi parmi 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, lequel agent anti-usure est présent à raison de 0,1 à 2,0 % en poids rapporté au fluide de base.Functional fluid for motor vehicle, characterized by the fact that it contains a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) according to any one of claims 1 to 6, and non-toxic and biodegradable functional additives, including at least one anti-wear agent chosen from dialkyldithiocarbamates zinc, sulfurized olefins, esters of unsaturated fatty acids sulfur, jojoba oil sulfur and vegetable oils likely to be sulfurized by trapping and transfer of sulfur from the fuel, which antiwear agent is present at 0.1 to 2.0% by weight reported to the base fluid. Fluide fonctionel pour véhicule automobile, caractérisé par le fait qu'il contient un fluide de base constitué de copolymères d'oxyde d'éthylène (EO) et d'oxyde de propylène (PO) selon l'une quelconque des revendications 1 à 4, et des additifs fonctionnels non toxiques et biodégradables, dont au moins un agent anti-mousse choisi parmi les polydiméthylsiloxanes, présent en une quantité inférieure à 0,02 % en poids rapporté au fluide de base.Functional fluid for motor vehicle, characterized by the fact that it contains a base fluid consisting of oxide copolymers ethylene (EO) and propylene oxide (PO) according to any one of claims 1 to 4, and non-toxic and biodegradable functional additives, including at least one anti-foaming agent chosen from polydimethylsiloxanes, present in an amount less than 0.02% by weight reported to the base fluid.
EP00401044A 1999-04-19 2000-04-14 Use of non-toxic, biodegradable functional fluids for motor vehicles Expired - Lifetime EP1046699B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9904900 1999-04-19
FR9904900A FR2792326B1 (en) 1999-04-19 1999-04-19 NON-TOXIC AND BIODEGRADABLE FUNCTIONAL FLUIDS BASED ON COPOLYMERS OF ETHYLENE OXIDE AND PROPYLENE OXIDE FOR MOTOR VEHICLES

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EP1046699A1 true EP1046699A1 (en) 2000-10-25
EP1046699B1 EP1046699B1 (en) 2008-05-07

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CN103525531A (en) * 2013-09-27 2014-01-22 奥克化学扬州有限公司 Cooling liquid for carrying out crystal bar taking on sapphire

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CN103842488A (en) * 2011-03-29 2014-06-04 陶氏环球技术有限责任公司 Lubricant compositions comprising polylkylene glycol diether with low Noack volatility

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WO2009074664A1 (en) * 2007-12-12 2009-06-18 Shell Internationale Research Maatschappij B.V. Lubricating oil composition
WO2009134716A1 (en) 2008-04-28 2009-11-05 Dow Global Technologies Inc. Polyalkylene glycol lubricant composition
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WO2012129056A1 (en) * 2011-03-23 2012-09-27 Dow Global Technologies Llc Polyalkylene glycol based heat transfer fluids and monofluid engine oils
CN103525531A (en) * 2013-09-27 2014-01-22 奥克化学扬州有限公司 Cooling liquid for carrying out crystal bar taking on sapphire

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FR2792326B1 (en) 2007-08-24
EP1046699B1 (en) 2008-05-07
FR2792326A1 (en) 2000-10-20
DE60038759D1 (en) 2008-06-19

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