EP3762466A1 - Utilisation d'un mélange en tant que fluide diélectrique - Google Patents
Utilisation d'un mélange en tant que fluide diélectriqueInfo
- Publication number
- EP3762466A1 EP3762466A1 EP19713531.2A EP19713531A EP3762466A1 EP 3762466 A1 EP3762466 A1 EP 3762466A1 EP 19713531 A EP19713531 A EP 19713531A EP 3762466 A1 EP3762466 A1 EP 3762466A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- composition
- mixture
- relative
- total
- 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.)
- Withdrawn
Links
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- QXEKMBCCXWKAON-UHFFFAOYSA-N 4-butan-2-yloxy-4-oxobutanoic acid Chemical compound CCC(C)OC(=O)CCC(O)=O QXEKMBCCXWKAON-UHFFFAOYSA-N 0.000 description 1
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- XOALFFJGWSCQEO-UHFFFAOYSA-N tridecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCOC(=O)C=C XOALFFJGWSCQEO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
- H01B3/22—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
Definitions
- the present invention relates to the use of a mixture comprising benzyltoluene and dibenzyltoluene as dielectric fluid, to improve the life of a transformer.
- the invention also relates to specific mixtures comprising benzyltoluene and dibenzyltoluene.
- Dielectric fluids are insulating materials conventionally used in electrical equipment, such as high-voltage cables and transformers, in which they are impregnated on a solid material used as an insulator, such as a polypropylene film, paper, possibly a combination of both called “mixed film-paper”.
- the dielectric fluids most commonly used in transformers are mineral oils on the one hand for their physico-chemical properties and on the other hand for their low cost and availability.
- mineral oils have the advantage of being good thermal conductors and of being able to effectively evacuate the heat produced by the current and through the windings and the magnetic circuit of a transformer, in particular a power transformer.
- a power transformer is called a transformer having an apparent power strictly greater than 3 MVA (in three-phase). Transformers with a power of less than or equal to 3 MVA are distribution transformers.
- the use of mineral oils poses problems in environmental matters, especially in case of leakage, and safety in case of fire due to a flash point and an ignition point that may be too low depending on the operating temperature of the transformer.
- the mineral oils have good dielectric and thermal performance but their use requires specific precautions in terms of safety and waste treatment occurring at the end of life of the oil and / or transformer.
- alternative fluids especially based on silicone oils or synthetic and natural esters, such as vegetable oils and fatty acid esters, have been developed. Indeed, the esters are biodegradable and the silicone oils are inert.
- alternative fluids generally have flash and ignition points twice as high as mineral oil, which reduces the potential for ignition or even explosion of the transformer.
- WO 2016/167176 discloses a dielectric fluid comprising at least one fatty acid ester.
- the reciprocating fluids have a low caloric evacuation capacity during heating of the transformer, which may in certain cases lead to a change in the design of the fluid circulation channels inside the transformer, leading in particular to their enlargement.
- their low chemical stability and oxidation resistance generally require the systematic presence of many additives.
- the fluids generally used as insulating materials in transformers, including power gradually lose their dielectric properties with aging, caused by operating conditions, and above all by the temperature.
- the use of fluids having better heat exchange characteristics allows the transformers to operate at lower temperatures, which could increase their service life.
- US 4,523,044 discloses dielectric fluids mainly consisting of oligomers of benzyltoluene and a small proportion of ditolylphenylmethane oligomers.
- a cellulosic insulation (called paper insulation) has also been designed to have an insulating material having better dielectric and thermal performance.
- Such insulation can be achieved using layers of paper and / or polymeric films, such as polypropylene films, superimposed and dried, and then impregnated with dielectric fluids.
- an insulating paper-based material has more affinity with water.
- the thermal degradation of the paper produces water which remains preferentially in the paper, which most often results in a deterioration of the dielectric properties of the insulating material.
- one of the objectives of the present invention is to implement dielectric fluids having increased thermal stability, improved heat exchange characteristics, in particular greater than those of mineral oils, as well as optimized electrical performance. to improve the life of the transformers.
- the invention more particularly aims to provide dielectric fluids having suitable properties to improve the life of the transformers.
- the Applicant has discovered that this need could be satisfied through the use of a particular mixture as a dielectric fluid. More particularly, the Applicant has discovered that this need could be satisfied through the use of a particular mixture as a dielectric fluid in a transformer.
- the present invention relates to the use of a mixture, as a dielectric fluid, comprising a composition A comprising dibenzyltoluene and benzyltoluene, to improve the shelf life of a transformer, preferably a power transformer.
- the invention relates to the use of a mixture as described above to increase the life of a transformer.
- the invention relates to the use of a dielectric fluid comprising a composition A as described above to increase the life of a transformer.
- the use of such a mixture improves the thermal performance, the heat exchange characteristics, in particular through a better efficiency with respect to the removal of calories during heating of the transformer. Indeed, this evacuation of calories is fast thanks to the use of such a mixture, which also reduces the temperature of the transformer, especially at full load.
- the mixture allows to evacuate more calories in free convection and forced convection.
- Another advantage of the use according to the present invention is that said mixture also slows the aging of the paper.
- the fluid advantageously solubilizes water, especially more than mineral oils.
- the use of such a mixture improves the electrical performance, in particular thanks to improved permittivity and dielectric strength.
- the dielectric strength expressed in V / m, is the minimum electric field that causes the breakdown of a material, as mentioned in "Engineering Techniques d2470: Insulating liquids in electrical engineering, presentation general ", by No ⁇ lle Berger, May 2002.
- the mixture thus has thermal and electrical advantages while respecting the requirements in terms of environmental protection and safety.
- composition A comprises dibenzyltoluene and benzyltoluene.
- dibenzyltoluene and benzyltoluene include their respective partially or fully hydrogenated counterparts.
- composition A dibenzyltoluene and benzyltoluene may be replaced in whole or in part, preferably in part, by one or more of their partially and / or fully hydrogenated homologues, preferably their partially hydrogenated counterparts.
- the composition A may also optionally comprise water within the meaning of the present invention. The water is nevertheless present in trace amounts when the composition A comprises, such that at a content less than or equal to 100 ppm relative to the total content of the composition A. The water may be present if however, preferably not added during the preparation of composition A but may correspond to the residual water provided by the mixed ingredients.
- the traces of water that may possibly be present in the composition A may also come from other sources of trace water that are found in the dielectric fluid during its use in a transformer
- the water may be derived from the degradation of the paper present in said transformer and mix with the dielectric fluid.
- composition A can be made from commercial compounds taken separately or obtained by a method of coupling benzyl chloride on toluene in the presence of a Friedel and Crafts catalyst, and then distillation.
- the composition A is prepared according to a process as described in document EP0435737, which uses ferric chloride as a catalyst.
- the reaction can be conducted at a temperature of 50 ° C to 150 ° C.
- the reaction mixture obtained is generally treated to remove, on the one hand, the excess toluene by distillation, and on the other hand, the organic chlorine products formed (for example by contacting, with heat and stirring, with an alcoholate ).
- the partially and / or fully hydrogenated homologues explained above can be easily obtained by partial or total hydrogenation of the mixture present in the composition A or by partial or total hydrogenation of each of the components of the composition A, and then mixed.
- the hydrogenation reactions and the operating conditions are now well known to those skilled in the art, and these hydrogenation reactions are advantageously catalytic reactions carried out under hydrogen pressure according to known and accessible procedures.
- the benzyltoluene may be in the form of any isomer, especially chosen from ortho- (CAS 713-36-0), para- (CAS 620-83-7), meta-benzyltoluene, and mixtures thereof (in particular CAS 27776-01 -8). Any isomer of dibenzyltoluene and mixtures thereof can be used (CAS 26898-17-9, CAS 53585-53-8).
- composition A comprises:
- composition A from 2% to 30% by weight of dibenzyltoluene, relative to the total weight of composition A; and from 70% to 98% by weight of benzyltoluene, relative to the total weight of composition A.
- the composition A comprises from 10% to 30% by weight of dibenzyltoluene, preferably from 12% to 28% by weight, more preferably from 22% to 25% by weight, relative to the total weight of the composition. AT.
- the composition A comprises from 70% to 90% by weight of benzyltoluene, preferably from 72% to 88% by weight, more preferably from 75% to 78% by weight, relative to the total weight of the composition A.
- composition A consists of 25% by weight of dibenzyltoluene and 75% by weight of benzyltoluene, relative to the total weight of composition A.
- An example of composition A is especially commercially available. from ARKEMA under the trade name Jarythem ® BT06.
- the invention relates to the use of a dielectric fluid comprising a composition A as described above to increase the life of a transformer.
- the dielectric fluid that can be used in the context of the present invention and comprising composition A may contain one or more other components, among which may be mentioned, esters, oils, for example mineral oils, as well as all types of additives. well known to those skilled in the art of transformers.
- the dielectric fluid used in the context of the present invention comprises a composition A as defined above, and at least one ester, preferably at least one organic acid ester.
- the mixtures comprising a composition A as defined above and at least one ester are new and as such also form part of the present invention.
- Said at least one organic acid ester that may be present in the dielectric fluid that may be used in the context of the present invention may be of any type that is well known to those skilled in the art and is preferably chosen from natural fatty esters. , artificial or synthetic, and more preferably from mono-, di-, tri- or tetraesters, obtained by reaction between at least one mono- or di-carboxylic fatty acid having from 5 to 30 carbon atoms with an alcohol , a diol, a triol or a linear or branched tetrol.
- said at least one ester is chosen from the group consisting of the esters of formulas (I) and (II) following:
- R 1 denotes a linear or branched, saturated or unsaturated carbon chain comprising from 5 to 30 carbon atoms, and preferably 5 to 20 carbon atoms;
- R 2 denotes a linear or branched, saturated or unsaturated carbon chain comprising from 1 to 10 carbon atoms, for example methyl, ethyl, propyl, butyl, 2-ethylhexyl, 2-octyl, decyl,
- R 3 , R 4 and R 5 denote, independently of each other, a carbon chain, linear or branched, saturated or unsaturated, comprising from 5 to 20 carbon atoms.
- R 1 comprises from 7 to 20 carbon atoms.
- R 2 comprises from 1 to 5 carbon atoms.
- R 3 , R 4 and R 5 denote an identical carbon chain.
- said at least one ester is selected from the group consisting of plant esters, vegetable oils and mixtures thereof.
- methyl glutarate ethyl glutarate, methyl oleate, butyl oleate, methyl succinate , 1-methylpropyl succinate, castor oil methyl esters, animal fat esters such as tallow methyl esters.
- Said esters may also be glycerides, for example those present in vegetable oils, such as olive oil, rapeseed oil, cocoa oil, peanut oil, coconut oil and the like. mustard, castor oil, cottonseed oil, sunflower oil, corn oil, safflower oil, palm oil, coconut oil, sesame oil, rice oil, linseed oil, grapeseed oil and soybean oil.
- vegetable oils such as olive oil, rapeseed oil, cocoa oil, peanut oil, coconut oil and the like. mustard, castor oil, cottonseed oil, sunflower oil, corn oil, safflower oil, palm oil, coconut oil, sesame oil, rice oil, linseed oil, grapeseed oil and soybean oil.
- the ester (s) that may be present in the dielectric fluid that can be used in the context of the present invention are those having a viscosity of less than or equal to 0.1 Pa.s. at 20 ° C, more preferably less than or equal to 0.06 Pa.s at 20 ° C, even more preferably less than or equal to 0.04 Pa.s at 20 ° C.
- the viscosity is measured using a Ubbelholde glass capillary viscometer according to the ISO 3104 standard.
- An example of such an ester is commercially available from the company ARKEMA under the trade name Esterai ® F.
- the mixture comprises from 72% to 96% by weight of composition A, preferably from 72% to 85% by weight, relative to the total weight of the mixture.
- the content by weight of ester ranges from 2% to 26% by weight, preferably from 10% to 20% by weight, relative to the total weight of the mixture.
- the dielectric fluid that can be used in the context of the present invention also comprises at least one additive chosen from the group consisting of antioxidants, passivators, pour point depressants and inhibitors. decomposition and mixtures thereof.
- a most preferred dielectric fluid comprises a decomposition inhibitor.
- antioxidants which can be advantageously used in the dielectric fluid, mention may be made, by way of non-limiting examples:
- phenolic antioxidants such as dibutylhydroxytoluene, butylhydroxyanisole, phenyl- ⁇ -naphthylamine, N, N-di- (2-naphthyl) -para-phenylene;
- amine-type antioxidants for example of the diamine type, such as tocopherol, -tocopherol, DL- ⁇ -tocopherol, ⁇ -tocopherol acetate, DL- ⁇ -tocopherol acetate, acetate of tocopherol, ⁇ -tocopherol, ascorbic acid, ascorbic acid salts, esters of ascorbic acid, singly or in mixtures of two or more of them or with other components, as example green tea extracts, coffee extracts.
- diamine type such as tocopherol, -tocopherol, DL- ⁇ -tocopherol, ⁇ -tocopherol acetate, DL- ⁇ -tocopherol acetate, acetate of tocopherol, ⁇ -tocopherol, ascorbic acid, ascorbic acid salts, esters of ascorbic acid, singly or in mixtures of two or more of them or with other components, as example green tea extracts, coffee extracts.
- the passivators that can be used as additives in the dielectric fluid that can be used in the context of the present invention are of any type known to those skilled in the art and are advantageously chosen from triazole derivatives, benzimidazoles, imidazoles, thiazole, benzothiazole.
- triazole derivatives benzimidazoles, imidazoles, thiazole, benzothiazole.
- dioctylaminomethyl-2,3-benzotriazolele and 2-dodecyldithioimidazole may be mentioned.
- the preferred acrylic polymers are those whose molecular weight is between 50000 g mol 1 and 500000 g mol 1 .
- Examples of these polymers acrylics include polymers which may contain linear alkyl groups having from 1 to 20 carbon atoms.
- heptyl poly (nonyl acrylate), poly (nonyl methacrylate), poly (undecyl acrylate), poly (undecyl methacrylate), poly (tridecyl acrylate), poly (methacrylate) tridecyl), poly (pentadecyl acrylate), poly (pentadecyl methacrylate), poly (heptadecyl acrylate), and poly (heptadecyl methacrylate).
- pour point depressant is commercially available from Sanyo Chemical Industries under the trade name ACLUBE.
- the dielectric fluid that can be used in the context of the present invention comprises at least one decomposition inhibitor, as an additive.
- the decomposition inhibitor may be of any type well known to those skilled in the art and in particular may be chosen from:
- carbodi-imide derivatives such as diphenyl carbodiimide, di-tolyl carbodiimide, bis (isopropylphenyl) carbodiimide, bis (butylphenyl) carbodiimide;
- alkyl glycidyl ethers, or esters alkyl glycidyl ethers, or esters
- epoxidized derivatives such as vinylcyclohexene diepoxides, 3,4-epoxy-6-methylcyclohexylmethyl (3,4-epoxy-6-methyl-hexane) carboxylate, phenol novolak type epoxy resins, bisphenol epoxy diglycidyl ether A, such as DGEBA or CEL 2021 P, available especially from the company WHYTE CHEMICAL.
- the mixture comprises a composition A and at least one decomposition inhibitor.
- the mixture comprises a composition A, at least one ester and at least one decomposition inhibitor.
- the content by weight of the additive, or additives optionally present in the dielectric fluid used in the context of the present invention may range from 0.0001% to 2% by weight, preferably 0.001%. at 1% by weight, more preferably from 0.01% to 0.5% by weight, relative to the total weight of the mixture.
- Another object of the present invention is a mixture comprising: a composition A as defined above;
- the mixture comprises:
- composition A comprising:
- composition A from 2% to 30% by weight of dibenzyltoluene, advantageously from 10% to 30% by weight of dibenzyltoluene, preferably from 12% to 28% by weight, more preferably from 22% to 25% by weight, relative to the weight total of composition A; and
- composition A from 70% to 98% by weight of benzyltoluene, advantageously from 70% to 90% by weight, preferably from 72% to 88% by weight, more preferably from 75% to 78% by weight, relative to the total weight of composition A;
- At least one organic acid ester preferably chosen from natural, artificial or synthetic fatty esters, and more preferably from mono-, di-, tri- or tetra-esters, obtained by reaction between at least one fatty acid; mono- or di-carboxylic acid having from 5 to 30 carbon atoms with an alcohol, a diol, a triol or a linear or branched tetrol. ; and
- the mixture described above comprises:
- composition A from 72% to 96% by weight of composition A, preferably from 72% to 85% by weight of composition A, relative to the total weight of the mixture;
- the total content of additives (when present) ranging from 0.0001% to 2% by weight, preferably from 0.001% to 1% by weight, more preferably from 0.01% to 0.5% % by weight, based on the total weight of the mixture.
- the mixture described above comprises:
- composition A from 72% to 96% by weight of composition A, preferably from 72% to 85% by weight, relative to the total weight of the mixture, said composition A comprising:
- dibenzyltoluene from 2% to 30% by weight of dibenzyltoluene, advantageously from 10% to 30% by weight of dibenzyltoluene, preferably from 12% to 28% by weight, more preferably from 22% to 25% by weight, relative to the weight total of composition A; and from 70% to 98% by weight of benzyltoluene, advantageously from 70% to 90% by weight, preferably from 72% to 88% by weight, more preferably from 75% to 78% by weight, relative to the total weight of composition A;
- additives selected from the group consisting of antioxidants, passivators, pour point depressants, decomposition inhibitors and mixtures thereof, the total content of additives (where present) ranging from 0.0001% to 2% by weight, preferably from 0.001% to 1% by weight, more preferably from 0.01% to 0.5% by weight, relative to the total weight of the mixture.
- the mixture according to the invention comprises at least one ester chosen from the group consisting of the esters of formulas (I) and (II) described above.
- the mixture described as described above, used as a dielectric fluid can improve the life of a transformer.
- the mixture according to the invention is used to improve the service life of distribution, power or measurement transformers, or high-voltage transformers, preferably distribution and power transformers. More preferably, the mixture according to the invention is used to improve the life of power transformers.
- the present invention relates to a transformer, preferably a power transformer, comprising a composition A as defined above, preferably comprising a mixture as defined above.
- a dielectric fluid, by way of comparison (B), and two dielectric fluids that can be used in the context of the invention (C and D), are prepared according to the compositions as indicated in the Table. 1 below:
- Composition A Jarytherm ® BT06, marketed by Arkema, and consisting of 25% by weight of dibenzyl toluene, based on the total weight of the composition A and 75% by weight of benzyltoluene, based on the total weight of composition A
- the water content of fluids B and C was measured before impregnation of paper in each of these fluids. It is respectively 20.8 ppm for the fluid B and 81.4 ppm for the fluid C. Then paper was impregnated with fluid B and fluid C. The aging of the paper in each of these fluids was studied. at different temperatures and durations.
- the fluids B and C are tested at 70 ° C, 100 ° C 130 ° C for periods of 250 hours and 500 hours respectively.
- the water content was measured at room temperature.
- the degree of polymerization was measured for the experiments conducted at 100 ° C. and 130 ° C. The results are summarized in Table 2 below. - Table 2 -
- the water content in the fluids is high. Water, being more soluble in paper, will migrate into the paper during impregnation at room temperature.
- the water content in the fluid C is always greater, regardless of the temperature and the duration of the tests. This indicates that the water will migrate faster in the fluid C which will keep the paper drier relative to the fluid B, thanks to its greater solubility of the water in the fluid C, at a given temperature, compared to fluid B.
- Table 3 clearly shows a greater temperature difference between the output of the transformer and the refrigerant outlet when the fluids C and D are used with respect to the fluid B.
- dielectric fluids C or D are used.
- the use of dielectric fluids C or D therefore allows a more efficient heat exchange.
- a more efficient heat exchange helps to slow the aging of the paper, in which the dielectric fluids are impregnated, therefore to improve the life of a transformer.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1852028A FR3078711B1 (fr) | 2018-03-08 | 2018-03-08 | Utilisation d'un melange en tant que fluide dielectrique |
| PCT/FR2019/050497 WO2019171001A1 (fr) | 2018-03-08 | 2019-03-06 | Utilisation d'un mélange en tant que fluide diélectrique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3762466A1 true EP3762466A1 (fr) | 2021-01-13 |
Family
ID=62167551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19713531.2A Withdrawn EP3762466A1 (fr) | 2018-03-08 | 2019-03-06 | Utilisation d'un mélange en tant que fluide diélectrique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20210005345A1 (fr) |
| EP (1) | EP3762466A1 (fr) |
| CN (1) | CN112088200A (fr) |
| FR (1) | FR3078711B1 (fr) |
| WO (1) | WO2019171001A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3101476B1 (fr) * | 2019-10-01 | 2021-09-24 | Arkema France | Fluide diélectrique pour rétrofilling de transformateur |
| FR3101477B1 (fr) * | 2019-10-01 | 2021-09-24 | Arkema France | Augmentation de la puissance d’un transformateur |
| FR3117113B1 (fr) * | 2020-12-09 | 2024-04-12 | Arkema France | Formulation liquide pour stockage d’hydrogène |
| CN114639546A (zh) * | 2022-01-20 | 2022-06-17 | 上海琪瑜光电科技股份有限公司 | 一种适用于自愈式脉冲电容器的浸渍剂 |
| CN116554951B (zh) * | 2023-05-19 | 2024-09-10 | 中国南方电网有限责任公司超高压输电公司大理局 | 电容器绝缘油及其制备方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2552423B1 (fr) * | 1983-09-23 | 1985-10-25 | Ugine Kuhlmann | Compositions d'oligomeres de polyarylalcanes et leur procede de fabrication |
| FR2656603B1 (fr) * | 1989-12-28 | 1993-05-21 | Atochem | Procedes de synthese de benzyltoluene et dibenzyltoluene a faible teneur en chlore. |
| FR2658812B1 (fr) * | 1990-02-27 | 1992-05-15 | Atochem | Compositions dielectriques a base de benzyltoluene et de (methylbenzyl) xylene. |
| FR2734392B1 (fr) * | 1995-05-19 | 1997-06-20 | Atochem Elf Sa | Composition dieletrique reticulable |
| FR2794567A1 (fr) * | 1999-06-07 | 2000-12-08 | Atofina | Composition dielectrique ayant une absorption de gaz amelioree |
| EP2210259A1 (fr) * | 2007-10-18 | 2010-07-28 | Cooper Technologies Company | Fluide diélectrique pour une performance de condensateur améliorée |
| FR3008708B1 (fr) * | 2013-07-19 | 2016-09-23 | Arkema France | Composition de fluide dielectrique ou caloporteur |
| CN105315969A (zh) * | 2014-07-07 | 2016-02-10 | 上海久星导热油股份有限公司 | 一种高温改性导热油及其制备方法 |
| WO2016167176A1 (fr) * | 2015-04-13 | 2016-10-20 | ライオン・スペシャリティ・ケミカルズ株式会社 | Huile de base pour huile électriquement isolante destinée à un dispositif électrique rempli d'huile, huile électriquement isolante la contenant, et dispositif électrique rempli d'huile |
| GB2541929B (en) * | 2015-09-04 | 2018-05-09 | M&I Mat Limited | Ester compositions for dielectric fluids |
-
2018
- 2018-03-08 FR FR1852028A patent/FR3078711B1/fr not_active Expired - Fee Related
-
2019
- 2019-03-06 CN CN201980030643.1A patent/CN112088200A/zh active Pending
- 2019-03-06 EP EP19713531.2A patent/EP3762466A1/fr not_active Withdrawn
- 2019-03-06 WO PCT/FR2019/050497 patent/WO2019171001A1/fr not_active Ceased
- 2019-03-06 US US16/976,990 patent/US20210005345A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| FR3078711B1 (fr) | 2020-07-31 |
| CN112088200A (zh) | 2020-12-15 |
| WO2019171001A1 (fr) | 2019-09-12 |
| US20210005345A1 (en) | 2021-01-07 |
| FR3078711A1 (fr) | 2019-09-13 |
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