JPH04253796A - High-temperature-durable grease composition - Google Patents
High-temperature-durable grease compositionInfo
- Publication number
- JPH04253796A JPH04253796A JP983891A JP983891A JPH04253796A JP H04253796 A JPH04253796 A JP H04253796A JP 983891 A JP983891 A JP 983891A JP 983891 A JP983891 A JP 983891A JP H04253796 A JPH04253796 A JP H04253796A
- Authority
- JP
- Japan
- Prior art keywords
- grease
- oil
- temperature
- formula
- ether 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
- 239000004519 grease Substances 0.000 title claims abstract description 26
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 24
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 11
- YFMDXYVZWMHAHJ-UHFFFAOYSA-N 1-pentaphen-1-yloxypentaphene Chemical compound C1=CC=CC2=CC3=C(C=C4C(OC=5C6=CC7=C8C=C9C=CC=CC9=CC8=CC=C7C=C6C=CC=5)=CC=CC4=C4)C4=CC=C3C=C21 YFMDXYVZWMHAHJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 16
- 239000002199 base oil Substances 0.000 claims description 13
- 239000002562 thickening agent Substances 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 5
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 abstract description 4
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 abstract description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 abstract description 3
- 125000005442 diisocyanate group Chemical group 0.000 abstract description 3
- XMKLTEGSALONPH-UHFFFAOYSA-N 1,2,4,5-tetrazinane-3,6-dione Chemical compound O=C1NNC(=O)NN1 XMKLTEGSALONPH-UHFFFAOYSA-N 0.000 abstract description 2
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 abstract description 2
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 abstract description 2
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 abstract description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 abstract description 2
- -1 diurea compound Chemical class 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000344 soap Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明はオルタネータ、電磁ク
ラッチ、アイドラプーリその他の自動車用の電装部品ま
たは補機用の軸受を高温条件下で潤滑する高温耐久性グ
リース組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-temperature durable grease composition for lubricating bearings for alternators, electromagnetic clutches, idler pulleys, and other electrical components or auxiliary equipment for automobiles under high-temperature conditions.
【０００２】0002
【従来の技術】近年、自動車用の電装部品またはその補
機は、小型、軽量化される方向に改良が進み、また高級
志向の需要も高まって、これら部品を使用するときの静
粛性の向上も求められた結果、エンジンルーム内は密閉
化される傾向にある。したがってエンジンルーム内は一
層高温となって、そこで使用される電装部品や補機も高
温に耐える必要性が高まってきた。[Background Art] In recent years, electrical components for automobiles and their auxiliary equipment have been improved to become smaller and lighter, and demand for luxury products has also increased, making it necessary to improve quietness when using these components. As a result, the interior of the engine room tends to be sealed. As a result, the inside of the engine room has become even hotter, and the electrical components and auxiliary equipment used there have become increasingly required to withstand high temperatures.
【０００３】上記した自動車用電装部品や補機に使用さ
れる軸受は、グリースを封入した密封軸受であり、この
ような軸受の寿命はグリースの耐久性によって決定され
ることになる。そのため、より高温長寿命型のグリース
の開発が必要になったが、従来広く使用されてまた金属
石けんを増ちょう剤とするグリース、すなわち、増ちょ
う剤と基油との組み合わせがポリウレア・鉱油系、ポリ
ウレア・エステル系またはポリウレア・ポリαオレフィ
ン系であるグリースは、いずれも酸化安定性、熱安定性
および揮発性の点において軸受寿命を延ばすものでない
という問題点がある。The bearings used in the above-described automotive electrical components and auxiliary equipment are sealed bearings filled with grease, and the lifespan of such bearings is determined by the durability of the grease. For this reason, it became necessary to develop a grease with higher temperature and longer life, but conventionally widely used greases that use metallic soap as a thickener, i.e., a combination of thickener and base oil, are based on polyurea and mineral oil. , polyurea-ester-based, or polyurea-poly-α-olefin-based greases have a problem in that they do not extend bearing life in terms of oxidation stability, thermal stability, and volatility.
【０００４】また、グリースの酸化安定性、熱安定性お
よび揮発性を改善するために、式（２）[0004] Furthermore, in order to improve the oxidation stability, thermal stability and volatility of grease, formula (2)
【０００５】[0005]
【化２】[Case 2]
【０００６】（式中、Ｒは直鎖アルキル基）で示される
、アルキルジフェニルエーテル油を基油として、ジウレ
ア化合物を増ちょう剤とするもの（特開平１−２５９０
９７号）も知られているが、グリースのちょう度が過大
であり、液状化の温度（滴点）および実機試験による高
温耐久性においても充分に満足できる結果が得られない
。したがって、このような従来のグリースは、高温条件
下で高速回転する軸受用グリースとして充分満足できる
ものでなかった。[0006] (In the formula, R is a straight chain alkyl group), which uses an alkyldiphenyl ether oil as a base oil and a diurea compound as a thickener (JP-A-1-2590)
No. 97) is also known, but the consistency of the grease is excessive, and sufficiently satisfactory results cannot be obtained in terms of liquefaction temperature (dropping point) and high-temperature durability in actual machine tests. Therefore, such conventional greases have not been fully satisfactory as greases for bearings that rotate at high speeds under high temperature conditions.
【０００７】[0007]
【発明が解決しようとする課題】以上述べたように、従
来の技術においては酸化安定性、熱安定性、揮発性が充
分満足できるグリースがなく、最近の電装部品、補機に
用いられる軸受用の封入グリースとして、高温、高速回
転条件下で耐久性のある長寿命のグリースとすることが
課題となっていた。[Problems to be Solved by the Invention] As stated above, in the conventional technology, there is no grease with sufficiently satisfactory oxidation stability, thermal stability, and volatility, and it is necessary to use grease for bearings used in recent electrical components and auxiliary equipment. The challenge was to create a long-life grease that would be durable under high-temperature, high-speed rotation conditions.
【０００８】[0008]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明はアルキルテトラフェニルエーテル油ま
たはペンタフェニルエーテル油を主要成分とする基油に
、増ちょう剤として式（１）[Means for Solving the Problems] In order to solve the above problems, the present invention provides a base oil containing an alkyl tetraphenyl ether oil or a pentaphenyl ether oil as a main component, and a thickener of the formula (1).
【０００９】[0009]
【化３】[Chemical formula 3]
【００１０】（式中、Ｒ１ は炭素数７〜１３の芳香族
炭化水素基、Ｒ２ およびＲ３ はシクロヘキシル基、
芳香族炭化水素基または炭素数８〜２０のアルキル基を
示し、Ｒ２ またはＲ３ の少なくとも一方がシクロヘ
キシル基または芳香族炭化水素基）で示されるジウレア
化合物を２〜４０重量％配合したのである。以下、その
詳細を述べる。(In the formula, R1 is an aromatic hydrocarbon group having 7 to 13 carbon atoms, R2 and R3 are a cyclohexyl group,
2 to 40% by weight of a diurea compound represented by an aromatic hydrocarbon group or an alkyl group having 8 to 20 carbon atoms, in which at least one of R2 or R3 is a cyclohexyl group or an aromatic hydrocarbon group, was blended. The details will be described below.
【００１１】本発明に用いるアルキルテトラフェニルエ
ーテル油は式（３）The alkyl tetraphenyl ether oil used in the present invention has the formula (3)
【００１２】0012
【化４】[C4]
【００１３】（式中、Ｒは炭素数１２〜１８の直鎖アル
キル基）で示されるモノアルキルテトラフェニルエーテ
ル、または式（４）Monoalkyl tetraphenyl ether represented by (wherein R is a linear alkyl group having 12 to 18 carbon atoms) or formula (4)
【００１４】[0014]
【化５】[C5]
【００１５】（式中、Ｒは炭素数１２〜１８の直鎖アル
キル基）で示されるジアルキルテトラフェニルエーテル
が挙げられる。これらは、いずれも前記式（２）で示さ
れたアルキルジフェニルエーテル油よりも芳香族環数に
おいてその構造が異なる。Examples include dialkyl tetraphenyl ethers represented by the formula (wherein R is a straight-chain alkyl group having 12 to 18 carbon atoms). All of these have different structures in terms of the number of aromatic rings than the alkyldiphenyl ether oil shown by the above formula (2).
【００１６】また、ペンタフェニルエーテル油は、式（
５）Further, pentaphenyl ether oil has the formula (
5)
【００１７】[0017]
【化６】[C6]
【００１８】で示される。It is shown as follows.
【００１９】つぎに、この発明において増ちょう剤とし
て使用される式（１）で示されるジウレア化合物は、ジ
イソシアネートとモノアミンの反応によって得られるも
ので、反応後、式（１）におけるＲ１ となるジイソシ
アネートとしては、４，４’−ジフェニルメタンジイソ
シアネート、トリレンジイソシアネートなどの芳香族イ
ソシアネートが挙げられる。式（１）中、Ｒ２ 、Ｒ３
となるモノアミンとしてはアニリン、シクロヘキシル
アミン、ステアリルアミン、セチルアミン、ラウリルア
ミンなどが挙げられる。このようなジウレア化合物の前
記基油に対する添加量は、２〜４０重量％である。なぜ
なら、２重量％未満の少量のジウレア化合物を添加して
得たグリースは、粘性の乏しい液状となり、４０重量％
を越える多量では固体状となって、軸受封入用グリース
の性状として不適となるからである。Next, the diurea compound represented by the formula (1) used as a thickener in the present invention is obtained by the reaction of a diisocyanate and a monoamine, and after the reaction, the diurea compound represented by R1 in the formula (1) is Examples include aromatic isocyanates such as 4,4'-diphenylmethane diisocyanate and tolylene diisocyanate. In formula (1), R2, R3
Examples of monoamines include aniline, cyclohexylamine, stearylamine, cetylamine, and laurylamine. The amount of such a diurea compound added to the base oil is 2 to 40% by weight. This is because grease obtained by adding a small amount of diurea compound, less than 2% by weight, becomes a liquid with poor viscosity;
This is because if the amount exceeds 100%, it becomes solid and the properties of the grease for sealing in a bearing are unsuitable.
【００２０】[0020]
【作用】この発明の耐熱性グリース組成物は、その基油
が４〜５個の芳香族環を有するアルキルテトラフェニル
エーテル油またはペンタフェニルエーテル油を主要成分
とするので、従来の基油である鉱油、合成油としてのポ
リαオレフィン油、ジエステル油、ポリオールエステル
油、アルキルジフェニルエーテル油より酸化安定性、熱
安定性において優れ、高温での揮発量も少ない。また、
このような基油に添加される増ちょう剤として、熱安定
性、酸化安定性、付着性がリチウム石けん、ナトリウム
石けんなどの金属石けんより優れたジウレア化合物を使
用したものであるから耐熱性があり、高温で長寿命とな
るのでる。[Operation] The heat-resistant grease composition of the present invention has a base oil containing an alkyl tetraphenyl ether oil or a pentaphenyl ether oil having 4 to 5 aromatic rings as a main component, so it is different from conventional base oils. It has better oxidation stability and thermal stability than mineral oil, synthetic oil such as poly-α-olefin oil, diester oil, polyol ester oil, and alkyldiphenyl ether oil, and also has less volatilization at high temperatures. Also,
As a thickener added to such base oils, diurea compounds are used, which have better thermal stability, oxidation stability, and adhesion than metal soaps such as lithium soap and sodium soap, so they are heat resistant. , it has a long life at high temperatures.
【００２１】[0021]
実施例１〜３
１ｍｏｌの４，４’−ジフェニルメタンジイソシアネー
トを表１に示す基油の半量に溶かした液に、同じく表１
に示す２ｍｏｌのモノアミンを残りの半量の基油に溶か
した液を撹拌しながら加えた後、１００〜１２０℃で３
０分間撹拌を続けて反応させ、グリース状にした。その
グリースに酸化防止剤を０．５ｇ加えて、さらに１００
〜１２０℃で１０分間撹拌した。その後、三本ロールで
均質化したグリースのちょう度、滴点および高温耐久試
験を行ない、その結果を表１に示した。Examples 1 to 3 In a solution in which 1 mol of 4,4'-diphenylmethane diisocyanate was dissolved in half of the base oil shown in Table 1,
After adding a solution of 2 mol of the monoamine shown in the remaining half of the base oil with stirring,
Stirring was continued for 0 minutes to allow reaction, resulting in a grease-like consistency. Add 0.5g of antioxidant to the grease and add 100g of antioxidant.
Stir for 10 minutes at ~120°C. Thereafter, the consistency, dropping point and high temperature durability tests of the grease homogenized with three rolls were conducted, and the results are shown in Table 1.
【００２２】ちょう度：ＪＩＳ Ｋ２２２０ ５．
３により測定した。
滴 点：グリースが融解して自重で落下し始める
温度（℃）をグリース類滴点試験方法ＪＩＳ Ｋ２２
２０ ５．４により測定した。[0022] Consistency: JIS K2220 5.
3. Dropping point: The temperature (°C) at which the grease begins to melt and drop under its own weight, according to the Grease Dropping Point Test Method JIS K22.
20 Measured according to 5.4.
【００２３】高温耐久試験：軸受６２０４にグリースを
封入し、鉄製の非接触型シールを両側面に備え付け、こ
れを軸受運転装置に装着し、雰囲気温度を１８０℃に保
ち、ラジアル荷重６７Ｎ、アキシャル荷重６７Ｎの条件
下毎分１００００回転の速度で内輪を回転し、軸受内グ
リースが劣化したことによって軸受の回転トルクが過大
になり、この主軸の回転を駆動している電動機の入力電
流が制限電流を超過して電動機が停止するまでの時間を
寿命とした。High temperature durability test: Bearing 6204 was filled with grease, iron non-contact seals were installed on both sides, this was attached to the bearing operating device, the ambient temperature was maintained at 180°C, radial load was 67N, axial load was The inner ring rotates at a speed of 10,000 revolutions per minute under the condition of 67N, and the grease inside the bearing deteriorates, causing the bearing rotational torque to become excessive, and the input current of the electric motor that drives the rotation of this main shaft to exceed the limiting current. The time until the motor stops due to excess is defined as the service life.
【００２４】[0024]
【表１】[Table 1]
【００２５】比較例１〜８
基油および増ちょう剤が知られた市販のグリースについ
て、実施例１〜３と全く同様の試験を行ない、その結果
を表２に示した。Comparative Examples 1 to 8 The same tests as in Examples 1 to 3 were conducted on commercially available greases with known base oils and thickeners, and the results are shown in Table 2.
【００２６】[0026]
【表２】[Table 2]
【００２７】表１および表２の試験結果からも明らかな
ように、基油にアルキルテトラフェニルエーテル油また
はペンタフェニルエーテル油を用い、増ちょう剤にジイ
ソシアネートとモノアミンとの反応で得たジウレア化合
物を用いた実施例１〜３のグリースは、ちょう度が２０
３〜２２５であって、比較例１〜８のちょう度（２３０
〜２８０）に比べて低く、滴点においても２８６〜２８
８℃という高い値を示し、耐熱性があり、高温下での性
状が安定したグリースであることが判明した。また、高
温耐久試験では比較例１〜８が１６〜４０５時間に止ま
るのに対し、実施例は４２３〜７１４時間という優れた
耐久性が認められた。As is clear from the test results in Tables 1 and 2, alkyl tetraphenyl ether oil or pentaphenyl ether oil was used as the base oil, and a diurea compound obtained by the reaction of diisocyanate and monoamine was used as the thickener. The greases used in Examples 1 to 3 had a consistency of 20.
3 to 225, and the consistency of Comparative Examples 1 to 8 (230
-280), and the dropping point is also 286-28
The grease showed a high value of 8°C and was found to be heat resistant and stable in properties at high temperatures. Further, in the high temperature durability test, Comparative Examples 1 to 8 only lasted for 16 to 405 hours, whereas the examples showed excellent durability of 423 to 714 hours.
【００２８】[0028]
【効果】この発明の高温耐久性グリース組成物は、以上
説明したように、基油および増ちょう剤が酸化安定性、
熱安定性に優れたものからなり、高温条件下で高速回転
する軸受に封入されるグリースとして、ちょう度、滴点
においても非常に安定した性質を示し、高温で耐久性あ
るグリースとして、産業上の利用価値が極めて高いもの
であるといえる。[Effects] As explained above, the high temperature durable grease composition of the present invention has a base oil and a thickener that have oxidative stability and
It is made of a material with excellent thermal stability, and as a grease sealed in bearings that rotate at high speed under high-temperature conditions, it exhibits extremely stable properties in terms of consistency and dropping point, and is used industrially as a grease that is durable at high temperatures. It can be said that the utility value is extremely high.
Claims (1)
たはペンタフェニルエーテル油を主要成分とする基油に
、増ちょう剤として式（１） 【化１】 （式中、Ｒ１ は炭素数７〜１３の芳香族炭化水素基、
Ｒ２ 及びＲ３ はシクロヘキシル基、芳香族炭化水素
基または炭素数８〜２０のアルキル基を示し、Ｒ２ ま
たはＲ３ の少なくとも一方がシクロヘキシル基または
芳香族炭化水素基）で示されるジウレア化合物を２〜４
０重量％配合してなる高温耐久性グリース組成物。Claim 1: A base oil containing alkyl tetraphenyl ether oil or pentaphenyl ether oil as a main component, as a thickener of the formula (1) [Chemical formula 1] (wherein, R1 is an aromatic group having 7 to 13 carbon atoms) hydrocarbon group,
R2 and R3 represent a cyclohexyl group, an aromatic hydrocarbon group, or an alkyl group having 8 to 20 carbon atoms, and at least one of R2 or R3 is a cyclohexyl group or an aromatic hydrocarbon group).
A high temperature durable grease composition containing 0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP983891A JP2912713B2 (en) | 1991-01-30 | 1991-01-30 | High temperature durable grease composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP983891A JP2912713B2 (en) | 1991-01-30 | 1991-01-30 | High temperature durable grease composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04253796A true JPH04253796A (en) | 1992-09-09 |
| JP2912713B2 JP2912713B2 (en) | 1999-06-28 |
Family
ID=11731273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP983891A Expired - Fee Related JP2912713B2 (en) | 1991-01-30 | 1991-01-30 | High temperature durable grease composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2912713B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707944A (en) * | 1994-10-17 | 1998-01-13 | Nsk Ltd. | Grease composition |
| DE19749979A1 (en) * | 1997-11-05 | 1999-05-06 | Schering Ag | New bis-ureido-diphenylalkane derivative interleukin-4 antagonists |
| US6214774B1 (en) * | 1997-01-27 | 2001-04-10 | Ntn Corporation | Grease for fan bearing |
| WO2010035826A1 (en) | 2008-09-26 | 2010-04-01 | 協同油脂株式会社 | Grease composition and bearing |
| US8918664B2 (en) | 2010-06-25 | 2014-12-23 | Panasonic Corporation | Integrated circuit, computer system, and control method, including power saving control to reduce power consumed by execution of a loop |
-
1991
- 1991-01-30 JP JP983891A patent/JP2912713B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707944A (en) * | 1994-10-17 | 1998-01-13 | Nsk Ltd. | Grease composition |
| US6214774B1 (en) * | 1997-01-27 | 2001-04-10 | Ntn Corporation | Grease for fan bearing |
| DE19749979A1 (en) * | 1997-11-05 | 1999-05-06 | Schering Ag | New bis-ureido-diphenylalkane derivative interleukin-4 antagonists |
| DE19749979C2 (en) * | 1997-11-05 | 2000-01-13 | Schering Ag | Medicaments containing N, N'-substituted ureas and their derivatives |
| WO2010035826A1 (en) | 2008-09-26 | 2010-04-01 | 協同油脂株式会社 | Grease composition and bearing |
| US10336964B2 (en) | 2008-09-26 | 2019-07-02 | Kyodo Yushi Co., Ltd. | Grease composition and bearing |
| US8918664B2 (en) | 2010-06-25 | 2014-12-23 | Panasonic Corporation | Integrated circuit, computer system, and control method, including power saving control to reduce power consumed by execution of a loop |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2912713B2 (en) | 1999-06-28 |
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