JP2002371290A - Grease composition for lubricating resin - Google Patents
Grease composition for lubricating resinInfo
- Publication number
- JP2002371290A JP2002371290A JP2001179768A JP2001179768A JP2002371290A JP 2002371290 A JP2002371290 A JP 2002371290A JP 2001179768 A JP2001179768 A JP 2001179768A JP 2001179768 A JP2001179768 A JP 2001179768A JP 2002371290 A JP2002371290 A JP 2002371290A
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- Prior art keywords
- grease composition
- resin
- grease
- present
- lubricating
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、樹脂潤滑用グリー
ス組成物に関する。さらに詳細には、樹脂製部材間、樹
脂製部材と他の素材製部材例えば、金属製部材との間の
潤滑に使用するのに適した樹脂潤滑用グリース組成物に
関する。[0001] The present invention relates to a grease composition for resin lubrication. More specifically, the present invention relates to a resin lubricating grease composition suitable for use in lubricating between resin members, or between a resin member and another material member such as a metal member.
【０００２】[0002]
【従来の技術】近年、自動車等の軽量化を目的として、
種々の金属製部材に代えて樹脂製部材が使用されること
が多くなってきている。例えば、自動車の電動パワース
テアリング（ＥＰＳ）の減速機構部には、樹脂（ポリア
ミド）製ウォームホイールギヤと、鋼製ウォームギヤが
使用されている。これらの樹脂製部材間、及び樹脂製部
材と金属製部材間の潤滑に使用されるグリース組成物と
して、特開平８−２０９１６７号公報には、水酸基を含
む脂肪酸又は多価アルコールの脂肪酸エステルを含む樹
脂潤滑用グリース組成物が記載されている。このグリー
ス組成物は、自動車の電動パワーステアリングの減速機
構部に使用した場合、長時間使用後にもトルクの変動が
抑制され、長時間運転しても、ハンドル操作に違和感が
ないという点で優れている。しかしながら、このグリー
ス組成物を大型車のＥＰＳに適用すると、潤滑箇所が高
荷重になって使用条件が厳しくなり、静摩擦力の増大か
らハンドルをゆっくり切った時に引っ掛かりを生じた
り、耐久寿命が短い等の問題がある。2. Description of the Related Art In recent years, to reduce the weight of automobiles and the like,
Resin members are increasingly used in place of various metal members. For example, a worm wheel gear made of resin (polyamide) and a worm gear made of steel are used in a reduction mechanism of an electric power steering (EPS) of an automobile. As a grease composition used for lubrication between these resin members and between the resin member and the metal member, JP-A-8-209167 discloses a fatty acid containing a hydroxyl group or a fatty acid ester of a polyhydric alcohol. A grease composition for resin lubrication is described. This grease composition is excellent in that, when used in a deceleration mechanism of an electric power steering of an automobile, fluctuations in torque are suppressed even after long-time use, and even when driving for a long time, there is no uncomfortable feeling in steering operation. I have. However, when this grease composition is applied to the EPS of a large vehicle, the lubricating portion becomes heavy and the operating conditions become severe, and the steering friction is increased. There is a problem.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明の目的
は、潤滑部の静摩擦係数を低くし、潤滑部の耐久寿命を
長くすることができる樹脂潤滑用グリース組成物を提供
することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a grease composition for resin lubrication which can lower the coefficient of static friction of a lubricated portion and extend the durability life of the lubricated portion.
【０００４】[0004]
【課題を解決するための手段】本発明は、増ちょう剤と
基油を含むグリースに、モンタンワックスを含有させた
ことを特徴とする樹脂潤滑用グリース組成物である。The present invention is a grease composition for resin lubrication, characterized in that a grease containing a thickener and a base oil contains montan wax.
【０００５】[0005]
【０００６】本発明のグリース組成物に使用する基油
は、特に制限されず、全ての基油が使用可能である。例
えば、鉱油、ジエステル、ポリオールエステルに代表さ
れるエステル系合成油、ポリαオレフィン、ポリブテン
に代表される合成炭化水素油、アルキルジフェニルエー
テル、ポリプロピレングリコールに代表されるエーテル
系合成油、シリコーン油、フッ素化油等が挙げられる。
これらのうち、特に好ましいものは、合成炭化水素油で
ある。合成炭化水素油は、各種樹脂との適合性が高く、
耐熱性と低温流動性のバランスが取れているためであ
る。合成炭化水素油の動粘度は６〜１５mm2/s（１００
℃）が望ましい。[0006] The base oil used in the grease composition of the present invention is not particularly limited, and all base oils can be used. For example, mineral synthetic oils such as mineral oils, diesters, ester synthetic oils such as polyol esters, polyalphaolefins, synthetic hydrocarbon oils such as polybutene, alkyl diphenyl ethers, ether synthetic oils such as polypropylene glycol, silicone oils, fluorinated oils Oil and the like.
Of these, particularly preferred are synthetic hydrocarbon oils. Synthetic hydrocarbon oil has high compatibility with various resins,
This is because heat resistance and low-temperature fluidity are balanced. The kinematic viscosity of the synthetic hydrocarbon oil is 6 to 15 mm 2 / s (100
° C) is desirable.
【０００７】本発明のグリース組成物に使用する増ちょ
う剤は、特に制限されず、全ての増ちょう剤が使用可能
である。例えば、Ｌｉ石けんや複合Ｌｉ石けんに代表さ
れる石けん系増ちょう剤、ジウレアに代表されるウレア
系増ちょう剤、有機クレイやシリカに代表される無機系
増ちょう剤、ＰＴＦＥに代表される有機系増ちょう剤等
が挙げられる。これらのうち、特に好ましいものは、ウ
レア系増ちょう剤である。ウレア系増ちょう剤は、高荷
重下の潤滑による発熱に対する耐性に優れ、他の増ちょ
う剤と比較して安価であり、従って実用性が大きい。本
発明のグリース組成物中の増ちょう剤の含有量は、増ち
ょう剤の種類により異なる。本発明のグリース組成物の
ちょう度は、２００〜４００が好適であり、増ちょう剤
の含有量はこのちょう度を得るのに必要な量となる。本
発明のグリース組成物中、増ちょう剤の含有量は、通常
３〜３０質量％、好ましくは５〜２５質量％である。The thickener used in the grease composition of the present invention is not particularly limited, and all thickeners can be used. For example, soap thickeners represented by Li soap and complex Li soap, urea thickeners represented by diurea, inorganic thickeners represented by organic clay and silica, and organic thickeners represented by PTFE And thickeners. Of these, particularly preferred are urea-based thickeners. The urea-based thickener has excellent resistance to heat generated by lubrication under a high load, is inexpensive compared to other thickeners, and is therefore highly practical. The content of the thickener in the grease composition of the present invention varies depending on the type of the thickener. The consistency of the grease composition of the present invention is preferably from 200 to 400, and the content of the thickener is an amount necessary for obtaining the consistency. In the grease composition of the present invention, the content of the thickener is usually 3 to 30% by mass, preferably 5 to 25% by mass.
【０００８】本発明に使用するモンタンワックスは、褐
炭を原料とし、これを精製、酸化して得られるモンタン
酸をベースとするワックスの総称である。市販品として
は、クラリアント社製のモンタンワックス、例えば、Li
cowax Ｕ、Licowax Ｓ等の酸ワックス、Licowax Ｅ、Li
cowax ＫＰＳ等のエステルワックス、Licowax ＯＰ、Li
cowax Ｏ等の部分ケン化エステルワックス等が挙げられ
る。[0008] The montan wax used in the present invention is a general term for a wax based on montanic acid obtained by refining and oxidizing brown coal as a raw material. Commercially available products include Clariant's montan wax, for example, Li
acid wax such as cowax U, Licowax S, Licowax E, Li
ester wax such as cowax KPS, Licowax OP, Li
and partially saponified ester waxes such as cowax O.
【０００９】モンタンワックスを初めとするワックス
を、樹脂の滑剤として使用することは既知である。滑剤
は、ポリマー（樹脂）への溶解度によって、内部滑剤と
外部滑剤に分類されるが、いずれも樹脂内部へ添加して
使用するものである。この使用法は、系外の潤滑剤であ
るグリース組成物に添加して使用する方法とは大きく異
なる。また、モンタンワックスをグリース組成物に添加
することは、特公昭６３−２６７９９号公報に記載され
ている。しかし、このグリース組成物は金属製部材間、
具体的には鋼製部材間の潤滑性の向上を目的とするもの
であって、本発明のように樹脂製部材の潤滑を目的とし
たものではない。The use of waxes, including montan wax, as lubricants for resins is known. Lubricants are classified into internal lubricants and external lubricants according to their solubility in the polymer (resin), and both are used by adding them to the interior of the resin. This method of use is significantly different from the method of adding and using a grease composition which is a lubricant outside the system. The addition of montan wax to the grease composition is described in JP-B-63-26799. However, this grease composition is used between metal members,
Specifically, the purpose is to improve the lubricity between steel members, and not to lubricate resin members as in the present invention.
【００１０】本発明のグリース組成物中、モンタンワッ
クスの含有量は、好ましくは０．５〜２０質量％、より
好ましくは１〜１０質量％である。０．５質量％未満で
は、目的とする効果の発現が不十分であり、２０質量％
を超えると、グリース組成物が硬くなりすぎて、使用が
困難になる。In the grease composition of the present invention, the content of montan wax is preferably 0.5 to 20% by mass, more preferably 1 to 10% by mass. If the amount is less than 0.5% by mass, the desired effect is not sufficiently exhibited, and 20% by mass.
If it exceeds 3, the grease composition becomes too hard, making it difficult to use.
【００１１】本発明のグリース組成物には必要に応じて
種々の添加剤を添加することができる。このような添加
剤としては、例えば、酸化防止剤、錆止め剤、金属腐食
防止剤、油性剤、耐摩耗剤、極圧剤、固体潤滑剤等が挙
げられる。本発明のグリース組成物は、基油、増ちょう
剤、モンタンワックス及びその他の添加剤を所望の配合
割合で混合することにより容易に製造することができ
る。Various additives can be added to the grease composition of the present invention as needed. Examples of such additives include antioxidants, rust inhibitors, metal corrosion inhibitors, oil agents, antiwear agents, extreme pressure agents, and solid lubricants. The grease composition of the present invention can be easily produced by mixing a base oil, a thickener, a montan wax and other additives at a desired mixing ratio.
【００１２】本発明のグリース組成物により潤滑される
樹脂の種類は特に限定されない。例えば、自動車の電動
パワーステアリングの減速機構部のウォームホイールギ
ヤに使用されているポリアミド樹脂（ナイロン）の他、
ポリアミドイミド樹脂、ポリアセタール樹脂、ポリブチ
レンテレフタレート樹脂、ポリエーテルエーテルケトン
樹脂、ポリフェニレンスルフィド樹脂等が挙げられる。
これらのうち、酸または酸誘導体の基、すなわち極性基
を有する樹脂が好ましい。The type of resin lubricated by the grease composition of the present invention is not particularly limited. For example, in addition to polyamide resin (nylon) used for the worm wheel gear of the reduction mechanism of the electric power steering of automobiles,
Polyamide imide resin, polyacetal resin, polybutylene terephthalate resin, polyether ether ketone resin, polyphenylene sulfide resin and the like can be mentioned.
Among these, a resin having a group of an acid or an acid derivative, that is, a polar group is preferable.
【００１３】本発明のグリース組成物が、樹脂製部材の
静摩擦係数を低くし、耐久寿命を長くする理由は明らか
ではないが、モンタンワックスも極性基を有しているこ
とから、樹脂製部材表面上でこれらの極性基が相互作用
を及ぼし、本発明のグリース組成物が樹脂製部材表面に
吸着することによって、より強固な潤滑膜を形成するこ
とが考えられる。Although it is not clear why the grease composition of the present invention lowers the static friction coefficient of the resin member and prolongs the durable life, since the montan wax also has a polar group, the surface of the resin member can be reduced. It is conceivable that these polar groups interact to form a stronger lubricating film by the grease composition of the present invention adsorbing on the surface of the resin member.
【００１４】[0014]
【実施例】実施例１〜３及び比較例１〜５ 表１及び表２に示す成分を表１及び表２に示す割合で配
合し、実施例１〜３、比較例１〜４のグリース組成物を
調製した。比較例５のグリース組成物は、従来（低荷
重）条件下での実績グリースである。Examples 1 to 3 and Comparative Examples 1 to 5 The components shown in Tables 1 and 2 were blended in the proportions shown in Tables 1 and 2, and the grease compositions of Examples 1 to 3 and Comparative Examples 1 to 4 were added. Was prepared. The grease composition of Comparative Example 5 is a proven grease under conventional (low load) conditions.
【００１５】・増ちょう剤 ジウレアＡ…ジフェニルメタン−４，４´−ジイソシア
ネートと、オクチルアミンから得られたジウレアグリー
ス ジウレアＢ…ジフェニルメタン−４，４´−ジイソシア
ネートと、オクチルアミンとオクタデシルアミンのモル
比３：1の混合アミンから得られたジウレアグリース ・基油 ＰＡＯ…ポリαオレフィン油 ・添加剤 モンタンワックスＡ…モンタン酸エステルワックツス 滴点：78−85℃、ケン化価：130−140 モンタンワックスＢ…モンタン酸部分ケン化エステルワ
ックス 滴点：96−192℃、ケン化価：102−122 パラフィンワックツス…石油ワックスから精製されたワ
ックス、融点：69℃、 平均分子量：472 アミドミワックス …ビスアミドワックス、融点143
℃Thickener diurea A: diphenylmethane-4,4'-diisocyanate, diurea grease obtained from octylamine diurea B: diphenylmethane-4,4'-diisocyanate, and a molar ratio of octylamine to octadecylamine of 3 : Diurea grease obtained from a mixed amine of 1: base oil PAO: polyalphaolefin oil-additive: montan wax A: montanic acid ester wax Dropping point: 78-85 ° C, saponification value: 130-140 montan wax B … Montanic acid partially saponified ester wax Drop point: 96-192 ° C, saponification value: 102-122 Paraffin wax… Wax refined from petroleum wax, melting point: 69 ° C, average molecular weight: 472 Amido wax… Bisamide wax , Melting point 143
° C
【００１６】試験・評価方法 ・静摩擦係数 実機ＥＰＳの「ハンドルをゆっくり切った時の引っ掛か
り」に相関する評価方法として実施する。摩擦係数が
０．１以下を合格とする。 （試験法）ASTM D2714 に規定される Falex Block on R
ing試験機を使用する。試験片にグリースを約０．１ｇ
塗布し、荷重を掛け、試験リングを手でゆっくり回し、
そのとき発生する静摩擦係数を測定する。 試験片 試験リング…規格品のFalex Type S10 (鋼
製) 試験ブロック…実際のＥＰＳに使用される樹脂材料（ポ
リアミド）を成形して作成した。 荷重 4.9ＮTest / Evaluation Method Static Friction Coefficient This is implemented as an evaluation method that correlates to the "trapping when the steering wheel is slowly turned" of the actual machine EPS. A coefficient of friction of 0.1 or less is considered acceptable. (Test method) Falex Block on R specified in ASTM D2714
Use an ing tester. About 0.1 g of grease on the test piece
Apply, apply load, slowly rotate the test ring by hand,
The static friction coefficient generated at that time is measured. Test piece Test ring: Standard Falex Type S10 (made of steel) Test block: A resin material (polyamide) used for actual EPS was formed by molding. Load 4.9N
【００１７】・ＥＰＳ耐久寿命 実機ＥＰＳを用いた台上耐久試験。ポリアミド樹脂製ウ
ォームホイールギヤの摩耗による耐久寿命を求める。な
お、耐久寿命試験は、静摩擦試験で合格したグリース組
成物についてのみ行った。 （試験法）実機ＥＰＳのポリアミド樹脂製ウォームホイ
ール部に試験グリースを塗布し、運転を行う。一定時間
ごとにポリアミド樹脂製ギヤの摩耗(バックラッシ)を計
測し、これが急激に増大した時間を耐久寿命時間とし
た。試験は、負荷であるＰ値を従来条件（Ｐ：１）、従
来条件の１．６倍（Ｐ：１．６）の２水準で実施した。
合格基準：Ｐ：１．６の条件下での耐久寿命が、基準の
耐久寿命に対して５以上のものを合格とする。ここで
「基準の耐久寿命」とは、従来のグリース（比較例５）
を、従来のＰ値（Ｐ：１）条件下で試験したときの耐久
寿命を１としたときの相対寿命時間を意味する。試験結
果を表１及び表２に示す。EPS endurance life A bench endurance test using an actual machine EPS. Determine the durability life due to the wear of the worm wheel gear made of polyamide resin. The durability life test was performed only on the grease composition that passed the static friction test. (Test method) A test grease is applied to a polyamide resin worm wheel portion of the actual machine EPS, and the operation is performed. Wear (backlash) of the polyamide resin gear was measured at regular intervals, and the time during which this increased sharply was taken as the endurance life time. The test was carried out at two levels of the P value, which is the load, under the conventional condition (P: 1) and 1.6 times the conventional condition (P: 1.6).
Acceptance criteria: P: A specimen whose durability life under the condition of 1.6 is 5 or more with respect to the standard durability life is accepted. Here, the "standard durability life" is a conventional grease (Comparative Example 5).
Means the relative life time when the durable life when tested under the conventional P value (P: 1) conditions is 1. The test results are shown in Tables 1 and 2.
【００１８】[0018]
【表１】＜実施例＞ [Table 1] <Example>
【００１９】[0019]
【表２】＜比較例＞ [Table 2] <Comparative example>
【００２０】試験結果 モンタンワックスを含有する本発明の実施例１〜３のグ
リース組成物はすべて静摩擦係数は０．０７、ＥＰＳ耐
久寿命はＰ：１で１０、Ｐ：１．６で５以上であった。
これに対して、モンタンワックス及び他の添加剤を含ま
ない比較例１のグリース組成物は、静摩擦係数が０．２
５と高く、不合格であった。モンタンワックス以外のワ
ックスを含有する比較例２及び３のグリース組成物は、
静摩擦係数がそれぞれ０．２５及び０．２０と高く、こ
れらのワックスは静摩擦係数を低減させる効果がないこ
とがわかる。鋼の潤滑作用が顕著であることが知られて
いるＺｎＤＴＰを含有する比較例４のグリース組成物の
静摩擦係数は０．２５であり、ＺｎＤＴＰは樹脂潤滑効
果を示さないことがわかる。現行実績品である比較例５
のグリース組成物は、静摩擦係数は０．０７と合格であ
るが、ＥＰＳ耐久寿命が０．０５と低く、本発明の目的
を達成し得ないことがわかる。Test Results All of the grease compositions of Examples 1 to 3 of the present invention containing montan wax had a static friction coefficient of 0.07, an EPS durability life of 10 at P: 1 and a durability of 5 or more at P: 1.6. there were.
On the other hand, the grease composition of Comparative Example 1 containing no montan wax and other additives had a coefficient of static friction of 0.2.
5 was high and was rejected. The grease compositions of Comparative Examples 2 and 3, which contain waxes other than montan wax,
The coefficient of static friction is as high as 0.25 and 0.20, respectively, indicating that these waxes have no effect of reducing the coefficient of static friction. The grease composition of Comparative Example 4 containing ZnDTP, which is known to have a remarkable lubricating effect on steel, has a static friction coefficient of 0.25, which indicates that ZnDTP has no resin lubricating effect. Comparative example 5 which is the current actual product
The grease composition has a static friction coefficient of 0.07, which is acceptable, but has a low EPS durable life of 0.05, indicating that the object of the present invention cannot be achieved.
【００２１】[0021]
【発明の効果】本発明のグリース組成物は、モンタンワ
ックスを含有しているため、従来より高荷重の条件下
で、樹脂製部材の静摩擦係数を低くし、従来のグリース
組成物と比較して耐久寿命をはるかに長くすることがで
きる。従って、大型車のＥＰＳに適用した場合には、ハ
ンドルをゆっくり切っても引っ掛かりを生じたりするこ
とはなく、また、樹脂製ギヤの耐摩耗性を顕著に向上さ
せ、耐久寿命を長くする。Since the grease composition of the present invention contains montan wax, the coefficient of static friction of the resin member is reduced under a condition of a higher load than in the past, and compared with the conventional grease composition. The durability life can be much longer. Accordingly, when the present invention is applied to the EPS of a large vehicle, the steering wheel does not catch even if the steering wheel is slowly turned, and the wear resistance of the resin gear is remarkably improved, and the durability life is extended.
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｃ１０Ｎ 30:06 Ｃ１０Ｎ 30:06 40:02 40:02 40:04 40:04 50:10 50:10 (72)発明者 瀧澤 孝 神奈川県藤沢市辻堂神台１丁目４番地１号 協同油脂株式会社社辻堂工場内 (72)発明者 山崎 聡 神奈川県藤沢市辻堂神台１丁目４番地１号 協同油脂株式会社社辻堂工場内 (72)発明者 山本 武士 群馬県前橋市鳥羽町78番地 日本精工株式 会社内 (72)発明者 岩野 敏行 群馬県前橋市鳥羽町78番地 日本精工株式 会社内 (72)発明者 恵田 広 群馬県前橋市鳥羽町78番地 日本精工株式 会社内 Ｆターム(参考） 4H104 BA07 BB08 BB17 BB33 BB34 BE13 CA04 CA05 CB16 CD04 CJ03 DA02 DA05 FA01 LA03 PA01 PA02 QA18 RA01 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) // C10N 30:06 C10N 30:06 40:02 40:02 40:04 40:04 50:10 50:10 (72 Inventor Takashi Takizawa 1-4-1, Tsujido Jindai, Fujisawa-shi, Kanagawa Prefecture Inside the Kyodo Yushi Corporation Tsujido Plant (72) Inventor Takeshi Yamamoto 78 Toba-cho, Maebashi-shi, Gunma Nippon Seiko Co., Ltd. (72) Inventor Toshiyuki Iwano 78-Toba-cho, Maebashi-shi, Gunma Nippon Seiko Co., Ltd. (72) Inventor Hiroshi Eda Maebashi, Gunma 78 Ichiba, Nippon Seiko Company F-term (reference) 4H104 BA07 BB08 BB17 BB33 BB34 BE13 CA04 CA05 CB16 CD04 CJ03 DA02 DA05 FA01 LA03 PA01 PA02 QA18 RA01
Claims (4)
ンタンワックスを含有させたことを特徴とする樹脂潤滑
用グリース組成物。1. A grease composition for resin lubrication, characterized in that a grease containing a thickener and a base oil contains montan wax.
特徴とする請求項１記載の樹脂潤滑用グリース組成物。2. The grease composition for resin lubrication according to claim 1, wherein the thickener is a urea compound.
とする請求項１又は２記載の樹脂潤滑用グリース組成
物。3. The grease composition for resin lubrication according to claim 1, wherein the base oil is a synthetic hydrocarbon oil.
を特徴とする請求項１〜３のいずれか１項記載の樹脂潤
滑用グリース組成物。4. The grease composition for resin lubrication according to claim 1, wherein the resin to be lubricated is a polyamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001179768A JP4037067B2 (en) | 2001-06-14 | 2001-06-14 | Grease composition for resin lubrication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001179768A JP4037067B2 (en) | 2001-06-14 | 2001-06-14 | Grease composition for resin lubrication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002371290A true JP2002371290A (en) | 2002-12-26 |
| JP4037067B2 JP4037067B2 (en) | 2008-01-23 |
Family
ID=19020291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001179768A Expired - Lifetime JP4037067B2 (en) | 2001-06-14 | 2001-06-14 | Grease composition for resin lubrication |
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| Country | Link |
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| JP (1) | JP4037067B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004081156A1 (en) * | 2003-03-11 | 2004-09-23 | Nsk Ltd. | Grease composition for resin lubrication and electrically operated power steering unit |
| EP1609694A1 (en) * | 2003-03-19 | 2005-12-28 | NSK Ltd. | Electric power steering device and resin gear used for the same |
| JP2006160072A (en) * | 2004-12-07 | 2006-06-22 | Nsk Ltd | Electric power steering device |
| US7169524B2 (en) | 2003-06-24 | 2007-01-30 | Konica Minolta Business Technologies, Inc. | Toner for developing electrostatic latent image and image-forming method using the same |
| JP2007099864A (en) * | 2005-10-03 | 2007-04-19 | Yamato Sewing Mach Co Ltd | Lubricant for sewing machine |
| JP2007314729A (en) * | 2006-05-29 | 2007-12-06 | Ntn Corp | Solid lubricant and solid lubricant-enclosing roller bearing |
| JP2008115304A (en) * | 2006-11-06 | 2008-05-22 | Cosmo Sekiyu Lubricants Kk | Urea grease composition for resin |
| JP2010185043A (en) * | 2009-02-13 | 2010-08-26 | Kyodo Yushi Co Ltd | Grease composition for resin lubrication |
| US7867956B2 (en) | 2004-12-27 | 2011-01-11 | Shell Oil Company | Urea-based lubricating grease composition |
| WO2014034761A1 (en) | 2012-08-31 | 2014-03-06 | Ｊｘ日鉱日石エネルギー株式会社 | Grease composition for electric power steering device, and electric power steering device |
| JP2016006483A (en) * | 2014-05-29 | 2016-01-14 | 株式会社リコー | Driving device, image forming apparatus, and grease composition |
| WO2018235281A1 (en) * | 2017-06-23 | 2018-12-27 | マブチモーター株式会社 | Grease |
| JP2021063183A (en) * | 2019-10-16 | 2021-04-22 | 協同油脂株式会社 | Grease composition for speed reducer part of on-vehicle electrical component |
| WO2021193504A1 (en) | 2020-03-23 | 2021-09-30 | 協同油脂株式会社 | Resin lubrication grease composition |
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| EP3239281B1 (en) | 2014-12-26 | 2019-11-06 | Kyodo Yushi Co., Ltd. | Grease composition for lubricating resins and electric power steering device |
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| JPWO2004081156A1 (en) * | 2003-03-11 | 2006-06-15 | 日本精工株式会社 | Grease composition for resin lubrication and electric power steering device |
| WO2004081156A1 (en) * | 2003-03-11 | 2004-09-23 | Nsk Ltd. | Grease composition for resin lubrication and electrically operated power steering unit |
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| JP2007099864A (en) * | 2005-10-03 | 2007-04-19 | Yamato Sewing Mach Co Ltd | Lubricant for sewing machine |
| JP2007314729A (en) * | 2006-05-29 | 2007-12-06 | Ntn Corp | Solid lubricant and solid lubricant-enclosing roller bearing |
| JP2008115304A (en) * | 2006-11-06 | 2008-05-22 | Cosmo Sekiyu Lubricants Kk | Urea grease composition for resin |
| JP2010185043A (en) * | 2009-02-13 | 2010-08-26 | Kyodo Yushi Co Ltd | Grease composition for resin lubrication |
| WO2014034761A1 (en) | 2012-08-31 | 2014-03-06 | Ｊｘ日鉱日石エネルギー株式会社 | Grease composition for electric power steering device, and electric power steering device |
| KR20150050579A (en) | 2012-08-31 | 2015-05-08 | 제이엑스 닛코닛세키에너지주식회사 | Grease composition for electric power steering device, and electric power steering device |
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| JP2021063183A (en) * | 2019-10-16 | 2021-04-22 | 協同油脂株式会社 | Grease composition for speed reducer part of on-vehicle electrical component |
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| WO2021193504A1 (en) | 2020-03-23 | 2021-09-30 | 協同油脂株式会社 | Resin lubrication grease composition |
| KR20220134643A (en) | 2020-03-23 | 2022-10-05 | 교도유시 가부시끼가이샤 | Grease composition for resin lubrication |
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