JPH0140441B2 - - Google Patents
Info
- Publication number
- JPH0140441B2 JPH0140441B2 JP55125841A JP12584180A JPH0140441B2 JP H0140441 B2 JPH0140441 B2 JP H0140441B2 JP 55125841 A JP55125841 A JP 55125841A JP 12584180 A JP12584180 A JP 12584180A JP H0140441 B2 JPH0140441 B2 JP H0140441B2
- Authority
- JP
- Japan
- Prior art keywords
- electrical
- insulating
- phenyl
- insulating oil
- oxidation stability
- 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.)
- Expired
Links
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Organic Insulating Materials (AREA)
- Lubricants (AREA)
- Transformer Cooling (AREA)
Description
本発明は電気絶縁油に関するものである。コン
デンサ、ケーブル、変圧器などの電気機器につい
ては、近年高圧化および小型化の傾向が著しく、
それに伴つて、絶縁材料として従来の絶縁紙の代
りに、あるいは絶縁紙と併用する形式で、合成樹
脂フイルムが使用されるようになつてきた。その
結果、電気絶縁油に要求される性能が益々厳しく
なつている。
従来から、油含浸電気機器用の絶縁油として、
鉱油、アルキルベンゼン、ポリブテン、アルキル
ナフタレン、アルキルビフエニル、ジアリールア
ルカンなどが提案され使用されている。しかし、
これらは上記のような電気機器の発展に伴う要求
に充分対応し得ていない。
すなわち、前述の電気機器の高圧化や小型化に
伴つて、使用する絶縁油に要求される性能は、絶
縁破壊電圧が高いこと、誘電損失の原因となる誘
電正接が低いことの他、酸化安定性が優れている
ことである。
絶縁油含浸電気機器、例えば油含浸のケーブ
ル、コンデンサ、変圧器、開閉器などにおいて
は、絶縁油の酸化安定性がこれら電気機器の性
能、特に長期安定性に大きな影響を与える。すな
わち、含浸した電気絶縁油の酸化安定性が優れて
いる程、これら電気機器の性能の経時劣化が少な
く、長時間安定した性能を示すので実用上望まし
い。従つて、電気絶縁油については、酸化安定性
が優れていることが強く望まれている。
しかしながら、前述の各絶縁油は、絶縁破壊電
圧および誘電損失はある程度満足し得るものであ
るが、酸化安定性は充分満足できるものではな
い。
本発明は、このような要望に応え得る新規な電
気絶縁油に関するものである。
すなわち、本発明は、１−フエニル−１−（３，
４−ジメチルフエニル）エタンを含む１−フエニ
ル−１−ジメチルフエニルエタン異性体混合物に
おいて、下記式（）で表わされる１−フエニル
−１−（２，４−ジメチルフエニル）エタンおよ
び下記式（）で表わされる１−フエニル−１−
（２，５−ジメチルフエニル）エタンの合計量が、
１−フエニル−１−（３，４−ジメチルフエニル）
エタンの100（重量比）に対して20以上であること
を特徴とする電気絶縁油組成物に係るものであ
る。
（ここで、R1およびR2はいずれもメチル基であ
る）
これらの化合物はいずれもｍ−キシレンまたは
ｐ−キシレンとスチレンとを酸触媒の存在下に反
応させて得ることができる。
前記一般式（）および（）で表わされる化
合物は、これらと類似の化合物である１−フエニ
ル−１−（３，４−ジアルキルフエニル）エタン、
１−フエニル−１−モノアルキルフエニルエタン
などと比較して、酸化安定性が特異的に優れてい
る。
式（）のごとくR1、R2が２，４の位置およ
び式（）のごとくR1、R2が２，５の位置にあ
る化合物がその構造に起因して特異的に酸化安定
性に優れていることは従来到底予想できないこと
であつた。また、式（）および（）の化合物
を他の電気絶縁油に混合するときには、単なる混
合による効果以上の酸化安定性改良の効果が発揮
されることもまた予想外のことである。
一般式（）あるいは（）で表わされるアリ
ールフエニルエタンは単独で用いることもできる
が、これらの化合物の２種以上の混合物として用
いることもできる。さらに、他の絶縁油、例え
ば、１−フエニル−１−（３，４−ジアルキルフ
エニル）エタン、１−アルキル−３−フエニルイ
ンダン類、および１，４−ジフエニルブタン類、
１，４−ジフエニルブテン類などのアリールフエ
ニルアルカンあるいはジアリールアルカン系の絶
縁油との混合物として用いることも好ましく行な
い得る。
この場合、一般式（）あるいは（）で表わ
されるアリールフエニルエタンの合計含有量は、
他の絶縁油100に対して20以上あることが、得ら
れる絶縁油の酸化安定性向上の観点から望まし
い。
このようにして得られる本発明の電気絶縁油
は、酸化安定性が極めて優れ、さらに他の諸特
性、すなわち、絶縁破壊電圧、体積抵抗率、誘電
損失なども優れたものである。また高い誘電率を
有する。
本発明の電気絶縁油は上記のような諸特性を有
しているので、コンデンサ、ケーブル、変圧器そ
の他各種の電気機器に好適に使用し得る。
本発明の電気絶縁油は、上記組成の化合物ある
いはその混合物からなるものであるが、これのみ
に限定されるものではない。すなわち、その一般
的電気的性能を損わずに、所望の電気的性能を改
善する目的で、前記アリールフエニルアルカンや
ジアリールアルカンなど以外に、ポリブテンや鉱
油系絶縁油、アルキルベンゼン系絶縁油、アルキ
ルナフタレン系やアルキルビフエニル系絶縁油な
どの他の芳香族系絶縁油を加えて使用することが
できる。ポリブテンは体積固有抵抗、誘電正接を
改善し、鉱油系絶縁油は破壊電圧を向上させ、ア
ルキルベンゼン系絶縁油および他の芳香族系絶縁
油は破壊電圧、誘電正接、流動点等を向上させる
が、いずれも誘電率を低下させる傾向があるので
50％以上加えることは好ましくない。また、必要
に応じて酸化安定剤を微量添加することは差し支
えない。
また、リン酸エステル系化合物エポキシ系化合
物などの電気絶縁油用の添加剤として公知の化合
物を併用することもできる。
以下に実施例により本発明の電気絶縁油を更に
詳細に説明する。
実施例および比較例
(1) 電気的特性試験
電気的特性を、表１に示す各種の絶縁油につ
いて測定した。その結果を表２に示す。表１
中、絶縁油４は本発明の実施例であり、絶縁油
１，２，３および５は比較例である。
The present invention relates to electrical insulating oil. In recent years, electrical equipment such as capacitors, cables, and transformers have seen a remarkable trend toward higher voltage and smaller size.
Along with this, synthetic resin films have come to be used as insulating materials in place of conventional insulating paper or in combination with insulating paper. As a result, the performance requirements for electrical insulating oils are becoming increasingly strict. Traditionally, it has been used as an insulating oil for oil-impregnated electrical equipment.
Mineral oil, alkylbenzene, polybutene, alkylnaphthalene, alkylbiphenyl, diarylalkane, etc. have been proposed and used. but,
These have not been able to sufficiently meet the demands accompanying the development of electrical equipment as described above. In other words, with the increase in voltage and miniaturization of electrical equipment mentioned above, the performance required of the insulating oil used is high dielectric breakdown voltage, low dielectric dissipation factor that causes dielectric loss, and oxidation stability. It is important to have excellent characteristics. In electrical equipment impregnated with insulating oil, such as oil-impregnated cables, capacitors, transformers, switchgears, etc., the oxidation stability of the insulating oil has a great influence on the performance of these electrical equipment, especially the long-term stability. That is, the better the oxidation stability of the impregnated electrical insulating oil is, the less the performance of these electrical devices will deteriorate over time and the more stable the performance will be for a long period of time, which is practically desirable. Therefore, it is strongly desired that electrical insulating oils have excellent oxidation stability. However, although each of the above-mentioned insulating oils has satisfactory dielectric breakdown voltage and dielectric loss to some extent, oxidation stability is not fully satisfactory. The present invention relates to a novel electrical insulating oil that can meet such demands. That is, the present invention provides 1-phenyl-1-(3,
In the 1-phenyl-1-dimethylphenylethane isomer mixture containing 4-dimethylphenyl)ethane, 1-phenyl-1-(2,4-dimethylphenyl)ethane represented by the following formula () and the following formula 1-phenyl-1- represented by ()
The total amount of (2,5-dimethylphenyl)ethane is
1-phenyl-1-(3,4-dimethylphenyl)
This relates to an electrical insulating oil composition characterized in that the ratio is 20 or more to 100 (weight ratio) of ethane. (Here, R 1 and R 2 are both methyl groups.) All of these compounds can be obtained by reacting m-xylene or p-xylene with styrene in the presence of an acid catalyst. The compounds represented by the above general formulas () and () include 1-phenyl-1-(3,4-dialkyl phenyl)ethane, which is a similar compound to these;
It has uniquely superior oxidation stability compared to 1-phenyl-1-monoalkyl phenylethane and the like. Compounds in which R 1 and R 2 are in the 2, 4 position as in formula () and compounds in which R 1 and R 2 are in the 2, 5 position as in formula () have specific oxidative stability due to their structure. Its superiority was something that could never have been predicted in the past. It is also unexpected that when the compounds of formulas () and () are mixed with other electrical insulating oils, the effect of improving oxidation stability is greater than the effect of mere mixing. The arylphenylethane represented by the general formula () or () can be used alone, but it can also be used as a mixture of two or more of these compounds. Additionally, other insulating oils, such as 1-phenyl-1-(3,4-dialkyl phenyl)ethane, 1-alkyl-3-phenylindanes, and 1,4-diphenylbutanes,
It can also be preferably used as a mixture with an arylphenylalkane or diarylalkane-based insulating oil such as 1,4-diphenylbutenes. In this case, the total content of arylphenylethanes represented by general formula () or () is:
From the viewpoint of improving the oxidation stability of the obtained insulating oil, it is desirable that the ratio is 20 or more to 100 of other insulating oils. The electrical insulating oil of the present invention thus obtained has extremely excellent oxidation stability and is also excellent in other properties, such as dielectric breakdown voltage, volume resistivity, and dielectric loss. It also has a high dielectric constant. Since the electrical insulating oil of the present invention has the above-mentioned properties, it can be suitably used in capacitors, cables, transformers, and various other electrical equipment. The electrical insulating oil of the present invention is composed of a compound having the above composition or a mixture thereof, but is not limited thereto. That is, in order to improve the desired electrical performance without impairing the general electrical performance, in addition to the arylphenyl alkanes and diaryl alkanes, polybutene, mineral oil-based insulating oil, alkylbenzene-based insulating oil, alkyl Other aromatic insulating oils such as naphthalene-based and alkyl biphenyl-based insulating oils can be used in addition. Polybutene improves volume resistivity and dielectric loss tangent, mineral oil-based insulating oil improves breakdown voltage, and alkylbenzene-based insulating oil and other aromatic insulating oils improve breakdown voltage, dielectric loss tangent, pour point, etc. Both tend to lower the dielectric constant, so
It is not preferable to add more than 50%. Further, a trace amount of an oxidation stabilizer may be added as necessary. Furthermore, compounds known as additives for electrical insulating oils, such as phosphate ester compounds and epoxy compounds, can also be used in combination. The electrical insulating oil of the present invention will be explained in more detail with reference to Examples below. Examples and Comparative Examples (1) Electrical Characteristics Test Electrical characteristics were measured for various insulating oils shown in Table 1. The results are shown in Table 2. Table 1
Among them, insulating oil 4 is an example of the present invention, and insulating oils 1, 2, 3, and 5 are comparative examples.
【表】【table】
【表】【table】
【表】
(2) 酸素吸収試験
次に酸素吸収特性を前記の各絶縁油について
測定した。試験温度115℃で銅触媒の存在下に
おける酸素吸収速度を測定した。その結果は添
付図面の通りであつた。図面中、曲線に付した
番号は表１に示した絶縁油の番号である。
(3) 酸化安定性試験
前記の各絶縁油を空気中で加熱し、加熱前後
の電気特性値を測定し、酸化安定性を比較し
た。試験はASTM−Ｄ−1934の方法に準拠し
た。その結果を表３に示す。
これらの結果より、本発明の電気絶縁油は、そ
の構造に起因して、他の絶縁油と比べて酸化安定
性が極めて優れていることが解る。また、酸化安
定性に劣る絶縁油１と混合するときには、両者の
平均値以上の酸化安定性を示すことが解る。[Table] (2) Oxygen absorption test Next, the oxygen absorption characteristics of each of the above-mentioned insulating oils were measured. The oxygen absorption rate in the presence of copper catalyst was measured at a test temperature of 115°C. The results were as shown in the attached drawing. In the drawings, the numbers attached to the curves are the numbers of the insulating oils shown in Table 1. (3) Oxidation stability test Each of the above-mentioned insulating oils was heated in air, the electrical property values before and after heating were measured, and the oxidation stability was compared. The test was based on the method of ASTM-D-1934. The results are shown in Table 3. These results show that the electrical insulating oil of the present invention has extremely superior oxidation stability compared to other insulating oils due to its structure. Furthermore, it can be seen that when mixed with insulating oil 1, which has poor oxidation stability, the oxidation stability is higher than the average value of both.
図面は電気絶縁油の酸化安定性の試験結果を示
すグラフである。曲線に付した符号は実施例およ
び比較例の絶縁油の番号を表わす。
The drawing is a graph showing test results of oxidation stability of electrical insulating oil. The symbols attached to the curves represent the numbers of the insulating oils of Examples and Comparative Examples.
Claims (1)
ニル）エタンを含む１−フエニル−１−ジメチル
フエニルエタン異性体混合物において、１−フエ
ニル−１−（２，４−ジメチルフエニル）エタン
および１−フエニル−１−（２，５−ジメチルフ
エニル）エタンの合計量が、１−フエニル−１−
（３，４−ジメチルフエニル）エタンの100（重量
比）に対して20以上であることを特徴とする電気
絶縁油組成物。1 In a 1-phenyl-1-dimethylphenylethane isomer mixture containing 1-phenyl-1-(3,4-dimethylphenyl)ethane, 1-phenyl-1-(2,4-dimethylphenyl)ethane and 1-phenyl-1-(2,5-dimethylphenyl)ethane.
An electrical insulating oil composition characterized in that the ratio is 20 or more to 100 (weight ratio) of (3,4-dimethylphenyl)ethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12584180A JPS5750708A (en) | 1980-09-10 | 1980-09-10 | Electric insulating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12584180A JPS5750708A (en) | 1980-09-10 | 1980-09-10 | Electric insulating oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5750708A JPS5750708A (en) | 1982-03-25 |
| JPH0140441B2 true JPH0140441B2 (en) | 1989-08-29 |
Family
ID=14920262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12584180A Granted JPS5750708A (en) | 1980-09-10 | 1980-09-10 | Electric insulating oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5750708A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5951407A (en) * | 1982-09-16 | 1984-03-24 | 日本石油化学株式会社 | Novel electrically insulating oil |
| JP4689203B2 (en) * | 2004-07-13 | 2011-05-25 | ヤンマー株式会社 | Work vehicle cabin |
| JP5814637B2 (en) | 2011-06-07 | 2015-11-17 | Ｊｘ日鉱日石エネルギー株式会社 | Electrical insulating oil composition with excellent low-temperature characteristics |
| CN104081469A (en) | 2012-02-03 | 2014-10-01 | 吉坤日矿日石能源株式会社 | Electrically insulating oil composition having excellent performance in wide temperature range |
| BR112014022569B1 (en) | 2012-03-13 | 2021-04-06 | Jx Nippon Oil & Energy Corporation | 1,1-DIPHENYLETANE AND BENZYLTOLUENE CAPACITOR OIL AND CAPACITOR |
| JP2013196913A (en) * | 2012-03-21 | 2013-09-30 | Jx Nippon Oil & Energy Corp | Electric insulating oil composition |
| JP6240444B2 (en) | 2013-09-12 | 2017-11-29 | Ｊｘｔｇエネルギー株式会社 | Electrical insulating oil composition and oil-impregnated electrical equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6030298B2 (en) * | 1977-04-27 | 1985-07-16 | 日本石油化学株式会社 | Aralkylation method of alkylbenzene |
| JPS54154742A (en) * | 1978-05-24 | 1979-12-06 | Kureha Chem Ind Co Ltd | Preparation of diarylethane derivative |
| JPS5536979A (en) * | 1978-09-07 | 1980-03-14 | Kureha Chemical Ind Co Ltd | Capacitor |
-
1980
- 1980-09-10 JP JP12584180A patent/JPS5750708A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5750708A (en) | 1982-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0158809B1 (en) | Electrical insulating oil and oil-filled electrical appliances | |
| US4053941A (en) | Oil impregnated electric device | |
| US4019996A (en) | Dielectric compositions | |
| US4142983A (en) | Phthalate mixtures useful as liquid dielectrics | |
| JPS6364213A (en) | Insulating oil composition | |
| US2033612A (en) | Chlorine derivatives of dibenzyl and process of preparing them | |
| US4108789A (en) | Dielectric compositions containing benzyl esters | |
| US2019338A (en) | Dielectric composition | |
| JPS634284B2 (en) | ||
| US2122278A (en) | Fluorinated paraffin wax | |
| FR2514935A1 (en) | Dielectric fluid contg. methyl di:phenyl pentene - useful e.g. in capacitors, transformers etc. | |
| JPS6391904A (en) | Perchloroethylene dielectric fluid containing fatty hydrocarbon | |
| JPS6329765B2 (en) | ||
| US4081393A (en) | Electrical insulating oils containing trialkyl benzenes | |
| GB2062671A (en) | Electric device comprising electrical insulating material | |
| US2012301A (en) | Halogenated polyphenyl ketone | |
| IE61206B1 (en) | An electrical insulator composition | |
| JPS634285B2 (en) | ||
| US4772428A (en) | Impregnating agents and the use thereof | |
| JPS5820081B2 (en) | Denkizetsuenyu | |
| US2198473A (en) | Diphenylene oxide compositions | |
| JPH0560201B2 (en) | ||
| JPS61165906A (en) | Insulation oil for medium or high voltage equipment | |
| US3420778A (en) | Voltage stabilized liquid dielectrics | |
| JPS58214206A (en) | electrical insulation oil |