EP1213340A1 - Fluide fonctionnel pour véhicules automobiles comprenant de l'urée - Google Patents
Fluide fonctionnel pour véhicules automobiles comprenant de l'urée Download PDFInfo
- Publication number
- EP1213340A1 EP1213340A1 EP01403164A EP01403164A EP1213340A1 EP 1213340 A1 EP1213340 A1 EP 1213340A1 EP 01403164 A EP01403164 A EP 01403164A EP 01403164 A EP01403164 A EP 01403164A EP 1213340 A1 EP1213340 A1 EP 1213340A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- functional fluid
- fluid
- urea
- motor vehicles
- functional
- 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
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 73
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000004202 carbamide Substances 0.000 title claims abstract description 20
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000001603 reducing effect Effects 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 6
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 3
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 15
- 230000001050 lubricating effect Effects 0.000 claims description 13
- 239000010705 motor oil Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 6
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 2
- 229920001521 polyalkylene glycol ether Polymers 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 15
- 239000000314 lubricant Substances 0.000 description 14
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 235000006408 oxalic acid Nutrition 0.000 description 5
- 238000005886 esterification reaction Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 231100000584 environmental toxicity Toxicity 0.000 description 3
- 231100000053 low toxicity Toxicity 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001868 water Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 125000003827 glycol group Chemical group 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000010718 automatic transmission oil Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
- C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
-
- 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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/20—Compounds containing nitrogen
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/061—Carbides; Hydrides; Nitrides
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
- C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/16—Carbon dioxide
-
- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/18—Ammonia
-
- 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/101—Condensation polymers of aldehydes or ketones and phenols, e.g. Also polyoxyalkylene ether derivatives thereof
- C10M2209/1013—Condensation polymers of aldehydes or ketones and phenols, e.g. Also polyoxyalkylene ether derivatives thereof 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/102—Polyesters
- C10M2209/1023—Polyesters 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/251—Alcohol-fuelled engines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
- C10N2040/28—Rotary engines
Definitions
- the invention relates to functional fluids for vehicles. automobiles and more particularly functional fluids allowing lasting lubrication of engines.
- Each motor vehicle currently contains a variety fluids with different functions such as oils engine and / or gear lubricants, hydraulic oils such as power steering oils, brake fluid or shock absorber fluid and coolant.
- nitrogen oxides NO x These nitrogen oxides which form during combustion can dissolve in the PAG lubricant film existing on the jacket. In fact, the PAG naturally contains or attracts a certain amount of water, which can increase during engine operation. Thus, the nitrogen acids, formed by dissolution of the nitrogen oxides, oxidize the ethylene glycol and the propylene glycol of the PAGs to form oxalic acid, then, at a later stage. dicarboxylic acids such as maleic or malonic acid.
- Oxalic acid is a crystalline acid which is deposited on parts of the engine whose temperature is lower than its temperature decomposition (around 189 ° C) and fouls them.
- polyalkylene glycols Polyalkylene glycols
- Polyalkylene glycol chains contain groups terminal hydroxyls which are liable to react by esterification with a dicarboxylic acid to form water and polyesters.
- the polyester formation is manifested by volatile loss of oil base lubricant and an increase in the total acid number and the viscosity of the lubricating fluid thus degrading the qualities of this latest.
- reducing agents present directly in the functional fluid has proven particularly effective in ensuring thermal and oxidative stability of lubricating fluids including as base fluids of polyalkylene glycols.
- reducing agent or additive a compound capable reduce the nitrogen oxides emitted during combustion, the acids nitric and nitrous present in the engine under the conditions of normal operation of the latter.
- the present invention therefore relates to a new type of functional fluids for motor vehicles characterized in that it includes a reducing additive.
- the invention also relates to the use of an agent reducing agent to reduce, limit and / or eliminate oxidation in motor vehicle functional fluids.
- the fluid functional includes, as base fluid, at least one polyalkylene glycol and / or a polyalkylene glycol ether such as those described in patent applications EP 0570 121 and EP 0 355 977. More particularly, the functional fluid can be a lubricant for engine.
- urea as a reducing agent.
- urea Another advantage of urea is its solubility in PAGs.
- urea in polyalkylene glycol-based fluids contributes, due to its biodegradability and low toxicity (LD 50 of approximately 8,500 mg / kg, oral administration to rats), to the efforts in terms of ecotoxicity which led to the use of polyalkylene glycols as base fluids.
- Polyalkylene glycols used as base fluid for the manufacture of functional fluids and more particularly of engine lubricants are generally random copolymers containing from 30 to 90% by weight of unit derived from ethylene oxide and from 70 to 10% by weight of unit derived from propylene oxide, having a weight average molecular weight of between 300 and 1,200.
- the lubricating fluid is added a reducing agent capable of reducing the nitrogen oxides emitted during combustion, and the nitrous acid and nitric acid dissolved in the lubricating fluid under normal operating conditions of the engine.
- the reducing action of the additive thus makes it possible to overcome the oxidation reaction by nitric and nitrous acids of PAG which leads to the formation of crystalline oxalic acid responsible for fouling or deposits observed on "cold" parts, including temperature does not exceed that of decomposition of oxalic acid.
- this reducing agent also makes it possible to level to the esterification reaction initiated by dicarboxylic acids on the hydroxyl terminal groups of the polyalkylene glycol chains. This esterification reaction was responsible for a thickening of the lubricating fluid.
- urea is more particularly preferred to use urea as an agent antioxidant in particular due to a selective reducing action.
- urea is a natural, biodegradable substance of low toxicity (urea is classified in Germany as a compound with low polluting power, it i.e. in pollution class 1 ( Wassergefährdungstre 1 )) and is not corrosive to aluminum alloys or gray cast iron.
- the lubricant can comprise, in addition to the base fluid, a mixture of very varied additives.
- urea mixed with the lubricant, preferably reacts with nitrogen oxides, nitrous acid and acid nitric by transforming them into water, carbon dioxide and nitrogen.
- urea reacts selectively with the compounds responsible for the oxidative degradation of the lubricating fluid and acts as well as a consumer of free radicals.
- Urea is generally used in concentrations less than or equal to 10% by weight relative to the total weight of the lubricant. More particularly, urea is present in the fluid lubricant in lower concentrations between 0.01 and 5% by weight compared to the total weight of the lubricant, even more particularly between 0.5 and 2% by weight relative to the total weight of the lubricant.
- the functional fluid according to the invention when it is a lubricant, allows long-term lubrication of the engine, because even a small amount of urea slows phenomena considerably fouling and increasing the viscosity of the lubricating fluid.
- the functional fluid produced by addition of reducing agents to basic fluids such as polyalkylene glycols can be for example, a motor oil, a gear oil, automatic transmission oil, oil for power steering, a hydraulic fluid for shock absorbers, a brake fluid or coolant.
- additives can be added to the functional fluid final according to the nature of the functional fluid. These are common additives preferably biodegradable and of low toxicity.
Landscapes
- 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)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
- Detergent Compositions (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims (11)
- Fluide fonctionnel pour véhicules automobiles, caractérisé en ce qu'il comprend un additif réducteur.
- Fluide fonctionnel pour véhicules automobiles selon la revendication 1, caractérisé en ce qu'il comprend, comme fluide de base, au moins un polyalkylèneglycol et/ou un éther de polyalkylèneglycol.
- Fluide fonctionnel pour véhicules automobiles selon la revendication 2, caractérisé en ce que le fluide de base est un copolymère d'oxyde d'éthylène (OE) et d'oxyde de propylène (OP) avec un rapport en poids OE/OP compris entre 30/70 et 90/10 et ayant une masse moléculaire moyenne en poids entre 300 et 1200.
- Fluide fonctionnel pour véhicules automobiles selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il s'agit d'un fluide lubrifiant de moteur.
- Fluide fonctionnel pour véhicules automobiles selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'additif réducteur est l'urée.
- Fluide fonctionnel pour véhicules automobiles selon la revendication 5, caractérisé en ce que la quantité d'urée est inférieure ou égale à 10 % en poids par rapport au poids total de fluide fonctionnel.
- Fluide fonctionnel pour véhicules automobiles selon la revendication 6, caractérisé en ce que la quantité d'urée est comprise entre 0,01 et 5 % en poids par rapport au poids total de fluide fonctionnel, et de préférence entre 0,5 et 2 % en poids par rapport au poids total de fluide fonctionnel.
- Utilisation d'un agent réducteur pour diminuer, limiter ou supprimer l'oxydation par les oxydes d'azote, l'acide nitrique et l'acide nitreux dans un fluide fonctionnel d'un véhicule automobile.
- Utilisation selon la revendication 8, caractérisée en ce que le fluide fonctionnel comprend des polyalkylèneglycols comme fluide de base.
- Utilisation selon la revendication 8 ou 9, caractérisée en ce que le fluide fonctionnel est un lubrifiant de moteur.
- Utilisation selon la revendication 8 ou 10, caractérisée en ce que l'agent réducteur est l'urée.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0015956A FR2817874B1 (fr) | 2000-12-08 | 2000-12-08 | Fluide fonctionnel pour vehicules automobiles comprenant de l'uree |
| FR0015956 | 2000-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1213340A1 true EP1213340A1 (fr) | 2002-06-12 |
| EP1213340B1 EP1213340B1 (fr) | 2010-11-17 |
Family
ID=8857398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01403164A Expired - Lifetime EP1213340B1 (fr) | 2000-12-08 | 2001-12-07 | Fluide fonctionnel pour véhicules automobiles comprenant de l'urée |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1213340B1 (fr) |
| AT (1) | ATE488563T1 (fr) |
| DE (1) | DE60143467D1 (fr) |
| ES (1) | ES2353954T3 (fr) |
| FR (1) | FR2817874B1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX324478B (es) | 2008-04-28 | 2014-10-14 | Dow Global Technologies Inc | Composicion lubricante de polialquilenglicol. |
| FR2968011B1 (fr) | 2010-11-26 | 2014-02-21 | Total Raffinage Marketing | Composition lubrifiante pour moteur |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB348642A (en) * | 1930-02-10 | 1931-05-11 | Ig Farbenindustrie Ag | Improvements in liquids used for lubricating and hydraulic purposes |
| GB802941A (en) * | 1956-07-10 | 1958-10-15 | Exxon Research Engineering Co | Lubricating composition |
| GB1002434A (en) * | 1960-12-16 | 1965-08-25 | Union Carbide Corp | Improvements in and relating to lubricants |
-
2000
- 2000-12-08 FR FR0015956A patent/FR2817874B1/fr not_active Expired - Fee Related
-
2001
- 2001-12-07 AT AT01403164T patent/ATE488563T1/de not_active IP Right Cessation
- 2001-12-07 ES ES01403164T patent/ES2353954T3/es not_active Expired - Lifetime
- 2001-12-07 DE DE60143467T patent/DE60143467D1/de not_active Expired - Lifetime
- 2001-12-07 EP EP01403164A patent/EP1213340B1/fr not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB348642A (en) * | 1930-02-10 | 1931-05-11 | Ig Farbenindustrie Ag | Improvements in liquids used for lubricating and hydraulic purposes |
| GB802941A (en) * | 1956-07-10 | 1958-10-15 | Exxon Research Engineering Co | Lubricating composition |
| GB1002434A (en) * | 1960-12-16 | 1965-08-25 | Union Carbide Corp | Improvements in and relating to lubricants |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2353954T3 (es) | 2011-03-08 |
| FR2817874A1 (fr) | 2002-06-14 |
| ATE488563T1 (de) | 2010-12-15 |
| EP1213340B1 (fr) | 2010-11-17 |
| DE60143467D1 (de) | 2010-12-30 |
| FR2817874B1 (fr) | 2005-02-11 |
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