CN1993775A - Electrical insulation oil - Google Patents
Electrical insulation oil Download PDFInfo
- Publication number
- CN1993775A CN1993775A CNA2005800250504A CN200580025050A CN1993775A CN 1993775 A CN1993775 A CN 1993775A CN A2005800250504 A CNA2005800250504 A CN A2005800250504A CN 200580025050 A CN200580025050 A CN 200580025050A CN 1993775 A CN1993775 A CN 1993775A
- Authority
- CN
- China
- Prior art keywords
- ester
- acid
- electric insulation
- oil
- insulation oil
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Lubricants (AREA)
Abstract
An electrical insulation oil that excels in biodegradability, having low viscosity at low temperature, and that even when a quantity of moisture is mixed therein, is low in the deterioration of insulation performance, ensuring satisfactory electrical characteristics. In particular, there is provided an electrical insulation oil comprising as a main component an ester composed of neopentyl glycol and at least one C<SUB>7</SUB>-C<SUB>10</SUB> linear or branched carboxylic acid and having a kinematic viscosity at 0 DEG C of 10 to 200 mm<SUP>2</SUP>/s, a dielectric breakdown voltage of = 30 kV, a biodegradability of = 60% and a fluid point of = -30 DEG C.
Description
Technical field
The present invention relates to the good electric insulation oil of electrical characteristics and biological degradability.
Technical background
As electric insulation oil, can use multiple oil such as refined mineral oil, alkyl benzene, alkyl naphthalene, silicone oil or ester oil.Recently, environmental problem, the especially biological degradability of the insulating oil of Guo Louing have come into one's own, proposed insulating oil scheme (opening the 2000-90740 communique with reference to the spy) that fatty acid ester that rapeseed oil and isobutanol generate by ester exchange reaction constitutes, also proposed the ester that trimethylolpropane and/or pentaerythrite and specific aliphatic acid makes is the electric insulation oil scheme (opening the 2004-273291 communique with reference to the spy) of main component.
Yet, distribution is with pole type transformer etc., there is not the transformer etc. of the natural circulation type of cooling of circulating pump, even require above-mentioned biological degradability and common insulation property, also require the low viscosity under the low temperature or how much sneak into moisture and the reduction of insulation property is also little etc. simultaneously.
The aspects such as viscosity of electric insulation oil under pour point or low temperature that aforementioned vegetable seed grease constitutes is not exclusively satisfactory, the commercially available in addition various electric insulation oil also viscosity under electrical characteristics, pour point, low temperature and the either side in the biological degradability has problem, the oil that these performances do not occur satisfying fully basically.
Summary of the invention
The present invention is the research that addresses the above problem, and its purpose is to provide biological degradability good, is low viscosity at low temperatures, even how much sneak into moisture the reduction of insulation property is also little, and the electric insulation oil of sufficient electrical characteristics is arranged.
The present invention relates to
(1) electric insulation oil is characterized in that with neopentyl glycol and C
7-10The ester of making more than a kind of straight or branched carboxylic acid be main component, the kinematic viscosity under 0 ℃ is 10-200mm
2/ s, insulation breakdown voltage are that 30kV is above, biological degradability is more than 60%, and pour point is below-30 ℃.
(2) above-mentioned (1) described electric insulation oil is characterized in that aforementioned ester contains at least a kind ester of neopentyl glycol and positive enanthic acid, caprylic acid, pelargonic acid, n-capric acid, 2 ethyl hexanoic acid and 3,5,5 Trimethylhexanoic acid.
(3) above-mentioned (1) described electric insulation oil is characterized in that aforementioned ester contains 5 moles of % above neopentyl glycol and C
8Or C
9The ester of branched carboxylic acids more than a kind.
(4) above-mentioned (3) described electric insulation oil is characterized in that aforementioned ester contains the neopentyl glycol of 5-100 mole % and the ester of 2 ethyl hexanoic acid.
(5) above-mentioned (1) described electric insulation oil, it is characterized in that adding respectively 1 quality % following phenol system compound and/or amine compound as antioxidant, as the triazole compounds of antistatic agent, and as more than the carbodiimides of hydrolysis inhibitor and/or epoxy compounds any.
Electric insulation oil of the present invention is because biological degradability is good, even also promptly decomposed by microbe so leak, load to natural environment is little, even and owing to be low viscosity, event at low temperatures at the outdoor natural circulation refrigerating function of also can bringing into play of low temp area etc., even how much sneak into the moisture of rainwater etc. in addition and the reduction of electrical insulation capability is also little, sufficient electrical characteristics are arranged, present the good this significant effect of Practical Performance.
Embodiment
Neopentyl glycol and C as electric insulation oil main component of the present invention
7-10The ester of making more than a kind of straight or branched carboxylic acid, can adopt usual way that aforementioned glycol and carboxylic acid are carried out the esterification manufacturing by catalyst-free or in the presence of the metal chloride catalyst of the strong acid catalyst of sulfuric acid, alkyl sulfonic acid etc. or stannic chloride, titanium chloride etc.In addition, the ester that makes can similarly be made with extra care by a series of processing such as depickling, washing, dehydration, decolouring, filtrations with the occasion of usually refining ester.
In addition, electric insulation oil of the present invention, can use with above-mentioned glycol and various carboxylic acids respectively individually the ester of esterification suitably mix, be that so-called physical mixed makes it to have the ester of setting proterties, can also use the ester of setting proterties that has that the so-called chemical mixing that in advance carboxylic acid more than two kinds suitably cooperated back and above-mentioned glycol to carry out esterification obtains.
Like this, the ester that physical mixed or the chemical mixing by handle and the above-mentioned carboxylic acid more than 2 kinds forms can satisfy the balance as the desired various characteristics of electric insulation oil with flying colors as base material.
Above-mentioned ester of the present invention, though can be the not esterification of a part of hydroxyl of neopentyl glycol and remaining part ester, the ester of whole hydroxy esterifications that preferably should alcohol (glycol).Particularly, below the preferred 50mgKOH/g of the hydroxyl value of above-mentioned ester, below the special preferred 10mgKOH/g.
In addition, as C
7-10The straight or branched carboxylic acid, represent with R-COOH that preferably a carboxyl is arranged, R is C
6-9The carboxylic acid of alkyl of straight or branched, special preferred positive enanthic acid, caprylic acid, pelargonic acid, n-capric acid, 2 ethyl hexanoic acid and 3,5,5 Trimethylhexanoic acid.In addition, as above-mentioned carboxylic acid, more preferably C
8Or C
9Branched carboxylic acids, particularly, preferably use 2 ethyl hexanoic acid or 3,5,5 Trimethylhexanoic acid, preferably this branched carboxylic acids becomes 5 moles more than the % in the total carboxylic acid, special preferred 15 moles more than the %, preferred again 25 moles more than the %.Especially, as carboxylic acid, preferably use to make 2 ethyl hexanoic acid be 5-100 mole % among the total carboxylic acid, special preferred 15-100 mole % is preferably 50-100 mole % again.
So long as it is just passable as the main component of base oil to contain above-mentioned ester, but especially from fully satisfying viscosity, the pour point under the low temperature more reliably, biological degradability and electrical characteristics etc. all require the balanced perspective of performance to consider, preferably contain more than the above-mentioned ester 50 quality % by base oil total amount benchmark, more preferably contain 80 quality % above, further contain more preferably that 90 quality % are above, most preferably above-mentioned ester is 100 quality % of base oil.
Base oil as electric insulation oil of the present invention, except above-mentioned ester, that can also use ester beyond the hydrocarbon system oil of mineral oil, olefin polymer, alkyl benzene etc. or polyethylene glycol, polyvingl ether, ketone, polyphenylene oxide, organosilicon, polysiloxanes, perfluor ether, the above-mentioned ester or ether etc. contains the oxygen artificial oil.
The kinematic viscosity of electric insulation oil of the present invention under 0 ℃ need be at 10-200mm
2The scope of/s is less than 10mm
2During/s, flash-point reduces and flame resistance is poor, surpasses 200mm
2During/s, the insulating oil circulation in the transformer is insufficient, cools off not exclusively and the reason of heating.Moreover, the kinematic viscosity 10-100mm under preferred 0 ℃
2/ s, special preferred 10-50mm
2The scope of/s.
In addition, electric insulation oil of the present invention, in order to become the oil little to the influence of natural environment, the biodegradation sexual needs are more than 60%, preferred biological degradability is more than 85%.Moreover this biological degradability is the result who adopts after 28 days that the method for OECD 301B regulation measures.
In addition, electric insulation oil of the present invention, pour point are below-30 ℃, and the pour point of electric insulation oil is not below-30 ℃ the time, use that can not the cold resistant area etc.In addition, in order to ensure the electrical characteristics of electric insulation oil excellence, the insulation breakdown voltage of stipulating by JIS C2101 must be more than the 30kV, preferably more than the 50kV.In addition, electric insulation oil of the present invention, the dielectric loss tangent (80 ℃) of pressing JIS C2101 regulation is preferred below 5%, and the spy is preferably below 2%.In addition, electric insulation oil of the present invention, in order to ensure good stable, preferred total acid number is below the 0.1mgKOH/g.
In addition, be the base oil of main component with the ester, compare with the base oil of mineral oil owing to being, so the transformer Miniaturizable than the high-k of dielectric constant near insulating paper.In addition, be the base oil of main component with the ester, because saturated water component height, so insulation breakdown voltage is remained on more than the 30kV even moisture concentration becomes 500ppm.
Electric insulation oil of the present invention, be phenol system compound and/or the amine compound that adds in the base oil of main component as antioxidant preferably at above-mentioned ester, as the carbodiimides and/or the epoxy compounds of hydrolysis inhibitor, and as in the triazole compounds of antistatic agent more than one each below the 1 quality %.
Phenol system compound or amine compound as aforementioned antioxidant, can exemplify out BHT, 4,4 '-methylene-two (2, the 6-DI-tert-butylphenol compounds), bisphenol-A, PA, N, N-two (2-naphthyl)-p-phenylenediamine (PPD), dioctyl diphenylamine etc.In addition, as the triazole compounds of aforementioned antistatic agent, can enumerate BTA, benzotriazole derivatives, thiadiazoles etc.In addition, carbodiimides as aforementioned hydrolysis inhibitor, can enumerate two (alkyl phenyl) carbodiimides of diphenyl carbodiimides or ditolyl base carbodiimides, two (isopropyl phenyl) carbodiimides, two (diisopropyl phenyl) carbodiimides, two (triisopropyl phenyl) carbodiimides, two (butyl phenyl) carbodiimides etc. etc., and, can enumerate phenyl glycidyl ether, phenyl glycidyl ester, C as the epoxy compounds of aforementioned hydrolysis inhibitor
5-18Alkyl glycidyl ether, C
5-18Alkyl glycidyl ester etc.
These antioxidant, hydrolysis inhibitor and antistatic agent can add more than one according to the performance that requires of each, and addition is by the gross mass benchmark of electric insulation oil, and each additive should be below the 1 quality %.When surpassing 1 quality %, generate sludge (sludge) when aging or produce painted.Especially, for antioxidant and hydrolysis inhibitor, preferred 0.05-1 quality %, special preferred 0.1-0.5 quality %, the preferred 5-1000ppm of antistatic agent, the special preferred 5-50ppm that adds.
In addition, in the electric insulation oil of the present invention except that above-mentioned additive, can add the additive of the extreme pressure agent, viscosity index (VI) improving agent, pour point depressant, detergent-dispersant additive, metal inerting agent etc. of the antiwear additive, sulphur compound etc. of zinc dithiophosphate etc. separately, or multiple combination is added.The addition of these additives does not have particular restriction, but presses electric insulation oil total amount benchmark, preferably below the 1 quality %.
＜embodiment 〉
Below, illustrate in greater detail the present invention according to embodiment.Moreover the present invention is not subjected to any restriction of following embodiment.
(embodiment 1)
Use neopentyl glycol (NPG), use positive enanthic acid (nC7), caprylic acid (nC8), pelargonic acid (nC9), n-capric acid (nC10), 2 ethyl hexanoic acid (bC8), 3 as alcohol as carboxylic acid, 5,5-tri-methyl hexanoic acid (bC9), n-butyric acie (nC4), dodecanoic acid (nC12), and in order to compare, use trimethylolpropane (TMP) or pentaerythrite (PE) as alcohol, prepare ester in the ratio shown in the table 1, as the oil that is for experiment.Moreover, be to use the ester of carboxylic acid more than 2 kinds to carry out chemical mixing, promptly, carry out the ester that esterification prepares with alcohol by setting than the mixed carboxylic acid.
Table 1
| For test oil No. | Alcohol | Carboxylic acid (mole %) | |||||||
| nC7 | nC8 | nC9 | nC10 | bC8 | bC9 | nC4 | nC12 | ||
| 1 | NPG | 100 | - | - | - | - | - | - | - |
| 2 | NPG | - | 100 | - | - | - | - | - | - |
| 3 | NPG | - | - | 100 | - | - | - | - | - |
| 4 | NPG | - | - | 50 | 50 | - | - | - | - |
| 5 | NPG | 30 | 35 | - | 35 | - | - | - | - |
| 6 | NPG | - | - | - | - | 100 | - | - | - |
| 7 | NPG | - | - | - | 70 | - | 30 | - | - |
| 8 | NPG | - | 20 | - | - | - | - | 80 | - |
| 9 | NPG | - | - | - | - | 10 | - | - | 90 |
| 10 | TMP | - | - | - | - | - | 100 | - | - |
| 11 | TMP | - | 70 | - | - | 30 | - | - | - |
| 12 | PE | - | - | - | - | - | 100 | - | - |
| 13 | PE | - | - | 20 | - | 80 | - | - | - |
| 14 | PE | - | - | - | - | 50 | - | - | 50 |
To the above-mentioned oil that is for experiment, measure rerum natura respectively, Practical Performance is estimated.Adopt following method to carry out physical property measurement and performance evaluation.These be the results are shown in table 2.
(1) kinematic viscosity, the method that adopts JISK2283 to stipulate is measured at 0 ℃.
(2) biological degradability: adopt the method (after 28 days) of OECD 301B regulation to measure.
(3) pour point: adopt the method for JIS K2269 regulation to measure.
(4) total acid number: adopt the method for JIS K2514 regulation to measure.
(5) insulation breakdown voltage: adopt the method for JIS C2101 regulation to measure.
(6) dielectric loss angle tangent: adopt the method for JIS C2101 regulation to measure at 80 ℃.
(7) flash-point: adopt the method (it is open to restrain sharp Fleder) of JIS K2265 regulation to measure.
Table 2
| Oily No. is for experiment | Kinematic viscosity (mm 2/s) | Biological degradability (%) | Pour point (℃) | Total acid number (mgKOH/g) | Insulation breakdown voltage (kV) | Dielectric loss tangent (%) | Flash-point (℃) |
| 1 | 21 | 92 | Less than-50 | 0.01 | 62 | 1.2 | 178 |
| 2 | 29 | 90 | -50.0 | 0.01 | 66 | 1.2 | 190 |
| 3 | 37 | 90 | -40.0 | 0.01 | 66 | 0.8 | 224 |
| 4 | 42 | 88 | -37.5 | 0.01 | 64 | 0.6 | 230 |
| 5 | 38 | 88 | -50.0 | 0.01 | 60 | 0.8 | 184 |
| 6 | 40 | 68 | Less than-50 | 0.01 | 60 | 0.6 | 190 |
| 7 | 55 | 62 | -40.0 | 0.01 | 62 | 0.8 | 234 |
| 8 | Less than 10 | 88 | Less than-50 | 0.01 | 68 | 1.9 | 136 |
| 9 | 96 | 72 | -15.0 | 0.01 | 62 | 1.0 | 236 |
| 10 | 730 | 28 | -40.0 | 0.02 | 68 | 0.8 | 246 |
| 11 | 84 | 52 | Less than-50 | 0.02 | 74 | 0.8 | 230 |
| 12 | 2970 | 23 | -15.0 | 0.02 | 60 | 0.8 | 250 |
| 13 | 446 | 46 | -20.0 | 0.02 | 66 | 1.1 | 256 |
| 14 | 855 | 64 | -7.5 | 0.01 | 64 | 1.2 | 260 |
Find out by table 2, according to the oil that is for experiment-17 of the present invention, kinematic viscosity, biological degradability, low temperature flow, flammability, Heat stability is good.Think the performance balance of electric insulation oil.By contrast, relatively be for experiment oily 8 kinematic viscosity and the flash-point of usefulness are low, the oil 9 stream pour points that are for experiment are too high, oily 10 kinematic viscosity height are for experiment, and biological degradability is low, and oily 11 biological degradabilities that are for experiment are low, and the oily 12-13 pour point height that is for experiment, biological degradability are low, the oily 14 pour point height that are for experiment are as the electric insulation oil inequality.
(embodiment 2)
In the above-mentioned oil 6 that is for experiment, by the oil quality benchmark that always is for experiment, add as 2 of antioxidant as the amount of table 3 expression respectively, 6-BHT (DBPC) or PA (PNA), as the BTA (BTA) of antistatic agent, as two (butyl phenyl) carbodiimides (BBPC) or the phenyl glycidyl ether (PGE) of hydrolysis inhibitor.
This oil that is for experiment is carried out oxidation stability degree test (adopting the method for JIS C2101 regulation, 120 ℃, 75 hours).The results are shown in table 3.
Table 3
| Oily No. is for experiment | DBPC(％) | PNA(％) | BTA(ppm) | BBPC(％) | PGE(％) | Oxidation stability test | |
| Total acid number (mgKOH/g) | Sludge (%) | ||||||
| 15 | - | - | - | - | - | 0.24 | 0.16 |
| 16 | - | - | 10 | - | - | 0.09 | 0.05 |
| 17 | 0.3 | - | - | - | - | 0.04 | 0.03 |
| 18 | - | 0.1 | 10 | - | - | 0.06 | 0.03 |
| 19 | - | - | - | 0.1 | - | 0.08 | 0.05 |
| 20 | - | - | 10 | - | 0.1 | 0.05 | 0.04 |
| 21 | - | - | 10 | 0.1 | - | 0.03 | 0.03 |
| 22 | 0.3 | - | 10 | - | - | 0.03 | 0.03 |
Can improve oxidation stability by this presentation of results by adding antioxidant, antistatic agent or hydrolysis inhibitor etc.
The possibility of utilizing on the industry
Electric insulation oil of the present invention is because biological degradability is good, low viscosity under the low temperature, even how much sneak into moisture the reduction of insulating properties is also little, sufficient electrical characteristics are arranged, so especially extremely useful with the electric insulation oil of pole type transformer as distribution, the insulating oil that also can be used as various electrical equipment such as other transformer, cable, capacitor, derailing switch etc. etc. uses.
Claims (5)
1. electric insulation oil is characterized in that with neopentyl glycol and C
7-10The ester of making more than a kind of straight or branched carboxylic acid be main component, the kinematic viscosity under 0 ℃ is 10-200mm
2/ s, insulation breakdown voltage are that 30kV is above, biological degradability is more than 60%, pour point is below-30 ℃.
2. the described electric insulation oil of claim 1 is characterized in that aforementioned ester contains at least a kind ester of neopentyl glycol and positive enanthic acid, caprylic acid, pelargonic acid, n-capric acid, 2 ethyl hexanoic acid and 3,5,5 Trimethylhexanoic acid.
3. the described electric insulation oil of claim 1 is characterized in that aforementioned ester contains 5 moles of % above neopentyl glycol and C
8Or C
9The ester of branched carboxylic acids more than a kind.
4. the described electric insulation oil of claim 3 is characterized in that aforementioned ester contains the ester 5-100 mole % of neopentyl glycol and 2 ethyl hexanoic acid.
5. the described electric insulation oil of claim 1, it is characterized in that adding respectively 1 quality % following phenol system compound and/or amine compound, as the triazole compounds of antistatic agent and as more than the carbodiimides of hydrolysis inhibitor and/or epoxy compounds any as antioxidant.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP298427/2004 | 2004-10-13 | ||
| JP2004298427 | 2004-10-13 | ||
| PCT/JP2005/016312 WO2006040888A1 (en) | 2004-10-13 | 2005-09-06 | Electrical insulation oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1993775A true CN1993775A (en) | 2007-07-04 |
| CN1993775B CN1993775B (en) | 2012-09-05 |
Family
ID=36148190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800250504A Active CN1993775B (en) | 2004-10-13 | 2005-09-06 | Electrical insulation oil |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4994846B2 (en) |
| KR (1) | KR101230701B1 (en) |
| CN (1) | CN1993775B (en) |
| WO (1) | WO2006040888A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105296051A (en) * | 2015-10-20 | 2016-02-03 | 中国石油化工股份有限公司 | Biodegradable insulation oil and preparation method thereof |
| CN106504816A (en) * | 2015-09-04 | 2017-03-15 | M&I材料有限公司 | Ester compositionss for dielectric fluid |
| CN107903985A (en) * | 2017-10-23 | 2018-04-13 | 中国科学院长春应用化学研究所 | A kind of synthesizing ester tractive transformer fluid composition and preparation method thereof |
| CN110079276A (en) * | 2014-02-20 | 2019-08-02 | Ａｇｃ株式会社 | Heat circulating system composition and heat circulating system |
| CN115449418A (en) * | 2022-09-29 | 2022-12-09 | 国网湖南省电力有限公司 | Fireproof insulating oil |
| CN116478754A (en) * | 2022-01-13 | 2023-07-25 | 中国石油天然气股份有限公司 | Ester type transformer oil composition with high hydrolytic stability |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5165307B2 (en) * | 2007-08-23 | 2013-03-21 | Ｊｘ日鉱日石エネルギー株式会社 | Electrical insulating oil and method for producing the same |
| JP5613395B2 (en) * | 2009-09-18 | 2014-10-22 | Ｊｘ日鉱日石エネルギー株式会社 | Electric motor oil composition |
| EP2920794A1 (en) * | 2012-11-13 | 2015-09-23 | E. I. du Pont de Nemours and Company | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same |
| GB201402571D0 (en) * | 2014-02-13 | 2014-04-02 | M & I Materials Ltd | Improvements in and relating to dielectric fluids |
| GB201502874D0 (en) * | 2015-02-20 | 2015-04-08 | M & I Materials Ltd | Low temperature dielectric fluid compositions |
| JP6430319B2 (en) * | 2015-04-15 | 2018-11-28 | 株式会社日立製作所 | Electrical insulating paper and static induction machine using the same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH088012B2 (en) * | 1987-06-12 | 1996-01-29 | 日本油脂株式会社 | Electrical insulating oil |
| JP2522307B2 (en) * | 1987-06-12 | 1996-08-07 | 日本油脂株式会社 | Electrical insulating oil |
| JP2967574B2 (en) * | 1990-11-16 | 1999-10-25 | 株式会社日立製作所 | Refrigeration equipment |
| KR100293318B1 (en) * | 1998-08-27 | 2001-10-26 | 이종훈 | Manufacture method of reagent for simple measurement of computational value of electric insulating oil and measurement method using measurement instrument and method |
| JP2003073681A (en) * | 2001-09-03 | 2003-03-12 | Hitachi Ltd | Working medium composition for refrigerator and refrigerator using the composition |
| JP3849482B2 (en) * | 2001-10-10 | 2006-11-22 | 新日本理化株式会社 | Lubricant |
| JP4502680B2 (en) | 2004-03-26 | 2010-07-14 | 株式会社ジャパンエナジー | Electrical insulation oil |
-
2005
- 2005-09-06 CN CN2005800250504A patent/CN1993775B/en active Active
- 2005-09-06 WO PCT/JP2005/016312 patent/WO2006040888A1/en active Application Filing
- 2005-09-06 JP JP2006540849A patent/JP4994846B2/en active Active
- 2005-09-06 KR KR1020077003563A patent/KR101230701B1/en active IP Right Grant
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110079276A (en) * | 2014-02-20 | 2019-08-02 | Ａｇｃ株式会社 | Heat circulating system composition and heat circulating system |
| CN110079276B (en) * | 2014-02-20 | 2022-01-14 | Ａｇｃ株式会社 | Composition for heat cycle system and heat cycle system |
| CN106504816A (en) * | 2015-09-04 | 2017-03-15 | M&I材料有限公司 | Ester compositionss for dielectric fluid |
| CN105296051A (en) * | 2015-10-20 | 2016-02-03 | 中国石油化工股份有限公司 | Biodegradable insulation oil and preparation method thereof |
| CN105296051B (en) * | 2015-10-20 | 2018-08-24 | 中国石油化工股份有限公司 | A kind of biodegradable insulating oil and preparation method thereof |
| CN107903985A (en) * | 2017-10-23 | 2018-04-13 | 中国科学院长春应用化学研究所 | A kind of synthesizing ester tractive transformer fluid composition and preparation method thereof |
| CN116478754A (en) * | 2022-01-13 | 2023-07-25 | 中国石油天然气股份有限公司 | Ester type transformer oil composition with high hydrolytic stability |
| CN115449418A (en) * | 2022-09-29 | 2022-12-09 | 国网湖南省电力有限公司 | Fireproof insulating oil |
| CN115449418B (en) * | 2022-09-29 | 2023-12-01 | 国网湖南省电力有限公司 | Fireproof insulating oil |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006040888A1 (en) | 2006-04-20 |
| CN1993775B (en) | 2012-09-05 |
| KR101230701B1 (en) | 2013-02-07 |
| JPWO2006040888A1 (en) | 2008-05-15 |
| JP4994846B2 (en) | 2012-08-08 |
| KR20070064587A (en) | 2007-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1993775A (en) | Electrical insulation oil | |
| RU2418847C2 (en) | Composition of electrically insulating oil | |
| US20080033201A1 (en) | Polyol Ester for Transformers | |
| BRPI0611906A2 (en) | oxidation stable oil formulation, and process for preparing the formulation, and use of the formulation | |
| EP2157159A1 (en) | Hydraulic fluid and hydraulic system | |
| KR101971135B1 (en) | Genetically-engineered microbial oil dielectric fluid | |
| CA2492565A1 (en) | Dielectric coolants for use in electrical equipment | |
| JP4266676B2 (en) | Electrical insulation oil | |
| CN1869177A (en) | Refrigeration lubricant composition | |
| US20140131642A1 (en) | Blended oil compositions useful as dielectric fluid compsotions and methods of preparing same | |
| WO2014078164A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| JP2002348586A (en) | Lubricating oil composition and precision component and bearing each using the same | |
| JP4502680B2 (en) | Electrical insulation oil | |
| US11292978B2 (en) | Low pour point trimethylolpropane esters | |
| US20140131637A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| US20140131639A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| CN1029006C (en) | Lubricant compositions for autotraction | |
| WO2014078156A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| US20140131640A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| US20140135522A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| US20140131638A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| US20140131641A1 (en) | Blended oil compositions useful as dielectric fluid compositions and methods of preparing same | |
| KR101641157B1 (en) | Insulatin oil composition for oil immersed type transformer | |
| EP4321592A1 (en) | Efficient and environmentally friendly coolant for direct cooling of electric accumulators | |
| CN116286149A (en) | Total synthesis vacuum pump oil composition and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |