JP2911528B2 - Lubricant - Google Patents
LubricantInfo
- Publication number
- JP2911528B2 JP2911528B2 JP4363590A JP4363590A JP2911528B2 JP 2911528 B2 JP2911528 B2 JP 2911528B2 JP 4363590 A JP4363590 A JP 4363590A JP 4363590 A JP4363590 A JP 4363590A JP 2911528 B2 JP2911528 B2 JP 2911528B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- metal oxide
- perfluoropolyether
- alkaline earth
- lubricating 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.)
- Expired - Lifetime
Links
Landscapes
- Lubricants (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、潤滑油に関する。更に詳しくは、パーフル
オロポリエーテル油を基油とする放射線照射条件下で使
用される潤滑油に関する。Description: TECHNICAL FIELD The present invention relates to a lubricating oil. More particularly, it relates to a lubricating oil used under irradiation conditions using a perfluoropolyether oil as a base oil.
パーフルオロポリエーテル油は、そのすぐれた耐熱
性、耐薬品性、多くの素材に対する不活性性などによ
り、長期間にわたりメンテナンスフリーとなる個所な
ど、苛酷な使用条件下でも使用されている。Due to its excellent heat resistance, chemical resistance, and inertness to many materials, perfluoropolyether oil is used even under severe use conditions such as a place where it is maintenance-free for a long time.
しかしながら、例えば原子炉中のポンプの潤滑油とし
て使用される場合など、放射線の照射条件下で使用され
る場合には、フェニルエーテル系の潤滑油などと違っ
て、放射線照射時における分解反応の生成物として、腐
食性のフッ化水素ガスを発生させ、それを潤滑油中ばか
りではなく、その多くを気相中に拡散させるため、放射
線照射条件下でのパーフルオロポリエーテル系潤滑油の
使用を不可能としている。However, when used under irradiation conditions, such as when used as a lubricating oil for pumps in nuclear reactors, unlike phenyl ether-based lubricating oils, the generation of decomposition reactions during irradiation In order to generate corrosive hydrogen fluoride gas as a substance and diffuse it not only in the lubricating oil but also in the gas phase, use of perfluoropolyether-based lubricating oil under irradiation conditions It is impossible.
一方、放射線照射に対して耐性のあるフェニルエーテ
ル系の潤滑油は、低温性、温度−粘度特性、耐熱性、化
学的安定性などの点において、要求される性能より劣っ
ている。On the other hand, phenyl ether-based lubricating oils that are resistant to irradiation are inferior to required performance in terms of low-temperature properties, temperature-viscosity properties, heat resistance, chemical stability, and the like.
本発明の目的は、それ自体すぐれた性質を有している
パーフルオロポリエーテル油を基油とする潤滑油におい
て、放射線照射条件下で使用されたとき、それの放射線
による分解ガスの拡散を抑制することにある。SUMMARY OF THE INVENTION An object of the present invention is to suppress the diffusion of a decomposition gas due to radiation of a lubricating oil based on a perfluoropolyether oil having excellent properties when used under irradiation conditions. Is to do.
かかる本発明の目的は、パーフルオロポリエーテル油
中に微細化されたアルカリ土類金属またはアルカリ金属
の酸化物を分散せしめた潤滑油によって達成される。The object of the present invention is achieved by a lubricating oil in which finely divided alkaline earth metal or alkali metal oxide is dispersed in perfluoropolyether oil.
パーフルオロポリエーテル油としては、粘度が約10〜
1000cst（40℃）程度のものが用いられる。これにミキ
サーなどを用いて添加される金属酸化物としては、例え
ば酸化マグネシウム、酸化カルシウムなどのアルカリ土
類金属酸化物または酸化リチウムのアルカリ金属酸化物
であって、一定量に対する表面積をある程度確保するた
めに、平均粒径が約1000μｍ以下、特に好ましくは約３
μｍ以下のものが、パーフルオロポリエーテル油100重
量部当り約10-8〜100重量部、特に好ましくは約10-2〜
３重量部の割合で用いられる。これ以下の添加割合で
は、本発明の目的とするフッ化水素ガスの拡散抑制効果
がみられず、一方これ以上の割合で用いると、液状では
なく半固形状となるため、オイル潤滑を不能とさせる。As a perfluoropolyether oil, the viscosity is about 10 to
A material of about 1000 cst (40 ° C.) is used. The metal oxide to be added thereto using a mixer or the like is, for example, an alkaline earth metal oxide such as magnesium oxide or calcium oxide or an alkali metal oxide of lithium oxide, and has a certain surface area for a given amount. Therefore, the average particle size is about 1000 μm or less, particularly preferably about 3 μm
μm or less, about 10 −8 to 100 parts by weight, particularly preferably about 10 −2 to 100 parts by weight per 100 parts by weight of perfluoropolyether oil.
Used in a proportion of 3 parts by weight. At an addition ratio lower than this, the effect of suppressing diffusion of hydrogen fluoride gas aimed at by the present invention is not observed.On the other hand, when used at a higher ratio, it becomes semi-solid rather than liquid, so that oil lubrication becomes impossible. Let it.
〔作用〕および〔発明の効果〕 パーフルオロポリエーテル油は、その構造上エネルギ
ー照射などによる分解反応に伴い、COF2を発生させる
が、このCOF2は不安定な物質であって、H2O分子などの
存在下で容易にHFに変化するおそれがある。[Function] and [Effect of the Invention] Perfluoropolyether oil generates COF 2 due to its decomposition reaction due to energy irradiation or the like due to its structure, but this COF 2 is an unstable substance, and H 2 O In the presence of molecules and the like, it may easily change to HF.
本発明においては、パーフルオロポリエーテル油中に
アルカリ土類金属またはアルカリ金属の酸化物を添加す
ることにより、HFを吸収し、それにより油中あるいは気
相中へのHFの拡散を有効に抑制させる。In the present invention, by adding an alkaline earth metal or an alkali metal oxide to perfluoropolyether oil, HF is absorbed, thereby effectively suppressing the diffusion of HF into the oil or gas phase. Let it.
しかも、微細化されたアルカリ土類金属またはアルカ
リ金属の酸化物の添加は、それによって懸念される摩耗
の増加をもたらさず、酸化マグネシウムなどはかえって
摩耗を減少させるという効果をも奏する。Moreover, the addition of the finely divided alkaline earth metal or alkali metal oxide does not cause an increase in abrasion, which is a concern therewith, while magnesium oxide and the like also have an effect of reducing abrasion.
また、潤滑油に増粘剤としてポリテトラフルオロエチ
レン粉末などを添加してグリース化することは周知であ
り、本発明の金属酸化物添加パーフルオロポリエーテル
油にポリテトラフルオロエチレン粉末などを添加してグ
リース化した場合にも、摩耗試験での良好な結果が得ら
れる。It is well known that grease is formed by adding polytetrafluoroethylene powder or the like as a thickening agent to a lubricating oil, and polytetrafluoroethylene powder or the like is added to a metal oxide-added perfluoropolyether oil of the present invention. Good grease results in good wear test results.
次に、実施例について本発明を説明する。 Next, the present invention will be described with reference to examples.
実施例１〜４、比較例１〜２ パーフルオロポリエーテル油 98重量部 NOKクリューバ製品BARRIERTA J100F:平均分子量約3500 粘度約100cst（40℃） J400F:平均分子量約7500 粘度約400cst（40℃） 微細化アルカリ土類金属またはアルカリ金属の酸化物
（平均粒径約1.4μｍ） ２重量部 上記組成の均一混合物を、直径25mm、長さ250mmの硝
子製アンプル管内に密封し、これを立ち掛けた状態で、
1Mrad/hrの60Coを16時間（計16Mrad）照射した。Examples 1-4, Comparative Examples 1-2 Perfluoropolyether oil 98 parts by weight NOK Cruba product BARRIERTA J100F: average molecular weight about 3500 viscosity about 100 cst (40 ° C) J400F: average molecular weight about 7500 viscosity about 400 cst (40 ° C) Fine 2 parts by weight of alkaline earth metal oxide or alkali metal oxide (average particle size of about 1.4 μm) A homogeneous mixture of the above composition was sealed in a glass ampoule tube having a diameter of 25 mm and a length of 250 mm, and the mixture was allowed to stand. so,
Irradiation was performed with 60 Co at 1 Mrad / hr for 16 hours (total 16 Mrad).
照射後、フッ化水素ガスの拡散状態を確認するため、
アンプル管内の気相をガスセル（直径35mm、長さ100m
m）にとり、赤外線分光光度計でCOF2の吸収（1895c
m-1）を測定し、次式に示されるLambert−Beerの理論に
より、logI0/Iの計算を行った。After irradiation, to check the diffusion state of hydrogen fluoride gas,
The gas phase in the ampoule tube is passed through a gas cell (35 mm in diameter, 100 m in length).
m), the absorption of COF 2 with an infrared spectrophotometer (1895c
m -1 ) was measured, and logI 0 / I was calculated according to the Lambert-Beer theory shown in the following equation.
logI0/I＝ε・ｃ・ｌ I0:ピークのベースライン I:ピーク先端の透過率（％） ε：吸光度計数 c:濃度 l:厚さ εおよびｌは、同一のセルによる同一のピークに着目
することで、常に一定となる。そのことから、logI0/I
は濃度を表わす指数となる。logI 0 / I = ε · cl · I 0 : peak baseline I: transmittance at peak tip (%) ε: absorbance count c: concentration l: thickness ε and l are the same peak in the same cell By paying attention to, it is always constant. From that, logI 0 / I
Is an index representing the concentration.
得られた結果は、パーフルオロポリエーテル油および
アルカリ土類金属またはアルカリ金属の酸化物の種類と
共に、次の表１に示される。The results obtained are shown in the following Table 1, together with the type of perfluoropolyether oil and the oxide of the alkaline earth metal or alkali metal.
また、アルカリ土類金属またはアルカリ金属の酸化物
の添加による摩耗をチェックするために、放射線照射前
の混合物について、曽田式四球試験機による摩耗試験
（JIS K−2519）を、次の条件下で行った。 In addition, in order to check wear due to the addition of alkaline earth metals or oxides of alkali metals, the mixture before irradiation was subjected to a wear test (JIS K-2519) with a Soda four-ball tester under the following conditions. went.
油 圧:4.0kg/cm2 回転数 :200rpm 試験時間:30分間 試験温度：室温 得られた結果は、次の表２に示される。Oil pressure: 4.0 kg / cm 2 Number of revolutions: 200 rpm Test time: 30 minutes Test temperature: room temperature The results obtained are shown in Table 2 below.
表２ 例 摩耗痕径（mm） 実施例１ 0.95 〃 ２ 1.42 〃 ３ 1.43 〃 ４ 0.79 比較例１ 1.40 〃 ２ 1.10Table 2 Example Wear scar diameter (mm) Example 1 0.95 〃2 1.42 ３3 1.43 ４4 0.79 Comparative example 1 1.40 表 2 1.10
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ１０Ｎ 30:00 30:06 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C10N 30:00 30:06
Claims (1)
たアルカリ土類金属またはアルカリ金属の酸化物を分散
せしめてなる、放射線照射条件下で使用される潤滑油。1. A lubricating oil used under irradiation conditions comprising a dispersion of finely divided alkaline earth metal or alkali metal oxide in perfluoropolyether oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4363590A JP2911528B2 (en) | 1990-02-23 | 1990-02-23 | Lubricant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4363590A JP2911528B2 (en) | 1990-02-23 | 1990-02-23 | Lubricant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03244694A JPH03244694A (en) | 1991-10-31 |
| JP2911528B2 true JP2911528B2 (en) | 1999-06-23 |
Family
ID=12669328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4363590A Expired - Lifetime JP2911528B2 (en) | 1990-02-23 | 1990-02-23 | Lubricant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2911528B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003213251A (en) * | 2001-10-23 | 2003-07-30 | Ausimont Spa | Use of fluorinated liquid as heat exchange or hydraulic fluid in presence of ionizing radiation and/or neutron irradiation |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009004607A (en) * | 2007-06-22 | 2009-01-08 | Meidensha Corp | Insulation vacuum equipment |
| JP5199498B2 (en) | 2011-04-27 | 2013-05-15 | 株式会社日立製作所 | Grease for electrical contacts and sliding energization structure, power switchgear, vacuum circuit breaker, vacuum insulation switchgear, and vacuum insulation switchgear assembly method |
| JP6244933B2 (en) * | 2014-01-21 | 2017-12-13 | Ｎｏｋクリューバー株式会社 | Lubricant composition |
-
1990
- 1990-02-23 JP JP4363590A patent/JP2911528B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003213251A (en) * | 2001-10-23 | 2003-07-30 | Ausimont Spa | Use of fluorinated liquid as heat exchange or hydraulic fluid in presence of ionizing radiation and/or neutron irradiation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03244694A (en) | 1991-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 11 Free format text: PAYMENT UNTIL: 20100409 |
|
| EXPY | Cancellation because of completion of term |