JPH051567B2 - - Google Patents
Info
- Publication number
- JPH051567B2 JPH051567B2 JP16534284A JP16534284A JPH051567B2 JP H051567 B2 JPH051567 B2 JP H051567B2 JP 16534284 A JP16534284 A JP 16534284A JP 16534284 A JP16534284 A JP 16534284A JP H051567 B2 JPH051567 B2 JP H051567B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pour point
- dibasic acid
- ester
- aliphatic dibasic
- 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 - Lifetime
Links
- 150000002148 esters Chemical class 0.000 claims description 10
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 9
- 239000008158 vegetable oil Substances 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 8
- 125000001931 aliphatic group Chemical group 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 6
- 235000019198 oils Nutrition 0.000 claims description 6
- -1 aliphatic ester Chemical class 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 235000019484 Rapeseed oil Nutrition 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 235000019438 castor oil Nutrition 0.000 claims description 4
- 239000004359 castor oil Substances 0.000 claims description 4
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 4
- 235000012343 cottonseed oil Nutrition 0.000 claims description 3
- 239000002385 cottonseed oil Substances 0.000 claims description 3
- 235000012424 soybean oil Nutrition 0.000 claims description 3
- 239000003549 soybean oil Substances 0.000 claims description 3
- 125000004185 ester group Chemical group 0.000 claims 1
- 239000004743 Polypropylene Substances 0.000 description 5
- YKGYQYOQRGPFTO-UHFFFAOYSA-N bis(8-methylnonyl) hexanedioate Chemical compound CC(C)CCCCCCCOC(=O)CCCCC(=O)OCCCCCCCC(C)C YKGYQYOQRGPFTO-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 150000004996 alkyl benzenes Chemical class 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lubricants (AREA)
- Organic Insulating Materials (AREA)
Description
産業上の利用分野
本発明はコンデンサ、変圧器などの電気機器に
用いられる電気絶緑油に関するものである。
従来の技術とその問題点
従来、電気絶緑油として鉱油、アルキルベンゼ
ン、アルキルジフエニ−ルエタンなどの炭化水素
系絶緑油が用いられていたが、誘電率が低いため
誘電率の高い植物油が使用されているが、一般に
植物油は流動点が高い欠点がある。比較的流動点
の低いものの例としては、第１表に示すものであ
るが、いずれも−30℃以上であり、ヒマシ油が−
30℃で他は−５〜−20℃ないしはそれ以上で、従
来の炭化水素油に比べ高く、電気機器の低温特性
が問題となつていた。
INDUSTRIAL APPLICATION FIELD The present invention relates to an electrically insulating oil used in electrical equipment such as capacitors and transformers. Conventional technology and its problems Traditionally, hydrocarbon-based oils such as mineral oil, alkylbenzene, and alkyldiphenyl ethane have been used as electricity-proofing oils, but because of their low dielectric constants, vegetable oils with high dielectric constants have been used. However, vegetable oils generally have a drawback of having a high pour point. Examples of relatively low pour points are shown in Table 1, all of which are -30°C or higher, and castor oil has a -30°C or higher pour point.
30℃, while others are -5 to -20℃ or higher, which is higher than conventional hydrocarbon oils, and the low-temperature characteristics of electrical equipment have been a problem.
【表】
問題点を解決するための手段
植物油の流動点を降下する方法として、アルキ
ルベンゼン、アルキルジフエニ−ルエタン、アル
キルナフタレンおよびアルキルジフエニ−ルなど
混合する方法（特願昭58−144241）があるが、こ
れらは油浸絶緑材料として一般に使用されている
ポリプロピレンフイルム（PPフイルム）の膨潤
料が大きいため、植物油の膨潤と同程度である脂
肪族二塩基酸エステルを混合してまた誘電率を低
下させることなく、上述の欠点を排除することに
有効であることを見出した。
実施例
以下、本発明を実験データーによつて説明す
る。
脂肪族二塩基酸エステルには、第２表に示すも
のが代表として挙げられる。[Table] Means for solving the problem As a method of lowering the pour point of vegetable oil, there is a method of mixing alkylbenzene, alkyl diphenyl ethane, alkyl naphthalene, and alkyl diphenyl (Japanese Patent Application 144241/1982). Because polypropylene film (PP film), which is commonly used as an oil-impregnated green material, has a large swelling agent, it is necessary to mix an aliphatic dibasic acid ester, which has the same degree of swelling as vegetable oil, to lower the dielectric constant. It has been found that this method is effective in eliminating the above-mentioned drawbacks. EXAMPLES The present invention will be explained below using experimental data. Representative aliphatic dibasic acid esters include those shown in Table 2.
【表】
脂肪族二塩基酸エステルのエステルに結合する
アルキル基（以下単にアルキル基という。例とし
て第２表アンダーライン部を示す。）の炭素数が
４であるDBSなどは、融点が−11℃と高いため、
植物油の流動点降下に有効ではない。
第１図は菜種油にDOA、DIDAおよびDOMの
脂肪族二塩基酸エステルの混合比に対する流動点
を示したものである。流動点はJIS Ｃ−2101の測
定方法によつて求めた。
第２図は綿実油、大豆油およびヒマシ油それぞ
れにDIDAを混合した油の混合比に対する流動点
を示している。各々の植物油に炭素数が８〜10の
アルキル基である脂肪族二塩基酸エステルを混合
すると流動点が下がる。しかし20％以上混合しな
いと効果が出にくいことが判明した。
発明の効果
以上のように綿実油、大豆油、菜種油ヒマシ油
などの植物油に８〜10の炭素数からなるアルキル
基を有する脂肪族二塩基酸エステルを20％以上混
合すると流動点を降下させる効果が得られる。し
かも第３表に示す試験結果の通り油浸絶緑材料と
して幅広く用いられているポリプロピレンフイル
ム（以下PPフイルムという）の膨潤を同程度に
おさえることができる。[Table] DBS, etc., in which the alkyl group bonded to the ester of aliphatic dibasic acid ester (hereinafter simply referred to as an alkyl group; the underlined part in Table 2 is shown as an example) has 4 carbon atoms, has a melting point of -11 Because the temperature is as high as ℃,
Not effective in lowering the pour point of vegetable oils. FIG. 1 shows the pour point for the mixing ratio of aliphatic dibasic acid esters of DOA, DIDA, and DOM in rapeseed oil. The pour point was determined by the measuring method of JIS C-2101. Figure 2 shows the pour points of cottonseed oil, soybean oil, and castor oil with respect to the mixing ratio of DIDA. When an aliphatic dibasic acid ester, which is an alkyl group having 8 to 10 carbon atoms, is mixed with each vegetable oil, the pour point is lowered. However, it was found that it was difficult to obtain an effect unless the mixture was mixed at 20% or more. Effects of the invention As described above, when 20% or more of an aliphatic dibasic acid ester having an alkyl group of 8 to 10 carbon atoms is mixed with vegetable oil such as cottonseed oil, soybean oil, rapeseed oil, or castor oil, it has the effect of lowering the pour point. can get. Furthermore, as shown in the test results shown in Table 3, the swelling can be suppressed to the same extent as polypropylene film (hereinafter referred to as PP film), which is widely used as an oil-impregnated green material.
【表】
ここで膨潤率は90℃におけるPPフイルムの厚
さ変化率の飽和値を示している。
また肪族二塩基酸エステルDOA、DIDAおよ
びDOMの誘電率が20℃においてそれぞれ4.3、
3.9および4.8であるため、本発明の電気絶緑油の
誘電率がほとんど下がることなく目的を達成する
ことができる。
したがつて、低温での電気機器の信頼度を著し
く向上させることができ、産業界に対する貢献度
は大なるものである。[Table] Here, the swelling rate indicates the saturation value of the rate of change in thickness of the PP film at 90°C. Furthermore, the dielectric constants of aliphatic dibasic acid esters DOA, DIDA, and DOM are 4.3 and 4.3, respectively, at 20°C.
Since they are 3.9 and 4.8, the objective can be achieved with almost no decrease in the dielectric constant of the electric insulating oil of the present invention. Therefore, the reliability of electrical equipment at low temperatures can be significantly improved, making a great contribution to industry.
第１図は、菜種油へのエステルの混合比−流動
点特性図、第２図は植物油へのDIDA混合比−流
動点特性である。
FIG. 1 is a graph showing the mixing ratio of ester to rapeseed oil vs. pour point characteristics, and FIG. 2 is the mixing ratio of DIDA to vegetable oil vs. pour point characteristics.
Claims (1)
物油に、脂肪族エステルのエステル基に結合する
アルキル基の炭素数が８〜10である脂肪族二塩基
酸エステルを20％以上混合したことを特徴とする
電気絶緑油。1 Characterized by mixing 20% or more of an aliphatic dibasic acid ester in which the alkyl group bonded to the ester group of the aliphatic ester has 8 to 10 carbon atoms in a vegetable oil such as cottonseed oil, soybean oil, rapeseed oil, or castor oil. Electric Zetsugreen Oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16534284A JPS6142816A (en) | 1984-08-06 | 1984-08-06 | Electrically insulating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16534284A JPS6142816A (en) | 1984-08-06 | 1984-08-06 | Electrically insulating oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6142816A JPS6142816A (en) | 1986-03-01 |
| JPH051567B2 true JPH051567B2 (en) | 1993-01-08 |
Family
ID=15810517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16534284A Granted JPS6142816A (en) | 1984-08-06 | 1984-08-06 | Electrically insulating oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6142816A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398986B1 (en) | 1995-12-21 | 2002-06-04 | Cooper Industries, Inc | Food grade vegetable oil based dielectric fluid and methods of using same |
| EP1304704B1 (en) * | 1995-12-21 | 2005-06-15 | Cooper Industries, Inc. | Vegetable oil based dielectric coolant |
| US6037537A (en) * | 1995-12-21 | 2000-03-14 | Cooper Industries, Inc. | Vegetable oil based dielectric coolant |
| PT912981E (en) * | 1996-06-18 | 2004-04-30 | Abb Inc | ELECTRIC INSULATION FLUIDS OF HIGH OLEIC ACID CONTENT AND PROCESS FOR THEIR PRODUCTION |
| US5949017A (en) | 1996-06-18 | 1999-09-07 | Abb Power T&D Company Inc. | Electrical transformers containing electrical insulation fluids comprising high oleic acid oil compositions |
| US5958851A (en) * | 1998-05-11 | 1999-09-28 | Waverly Light And Power | Soybean based transformer oil and transmission line fluid |
| CN106479621B (en) * | 2016-08-26 | 2019-10-18 | 重庆大学 | A kind of preparation method of mixed vegetable insulating oil |
-
1984
- 1984-08-06 JP JP16534284A patent/JPS6142816A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6142816A (en) | 1986-03-01 |
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