JP2711150B2 - グリース組成物 - Google Patents

グリース組成物

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Publication number
JP2711150B2
JP2711150B2 JP1263773A JP26377389A JP2711150B2 JP 2711150 B2 JP2711150 B2 JP 2711150B2 JP 1263773 A JP1263773 A JP 1263773A JP 26377389 A JP26377389 A JP 26377389A JP 2711150 B2 JP2711150 B2 JP 2711150B2
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JP
Japan
Prior art keywords
grease
ring system
oil
sodium
salt
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
Application number
JP1263773A
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English (en)
Other versions
JPH02158692A (ja
Inventor
バーナード・トゥリー
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of JPH02158692A publication Critical patent/JPH02158692A/ja
Application granted granted Critical
Publication of JP2711150B2 publication Critical patent/JP2711150B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02—Petroleum fractions
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    • C10M105/02—Well-defined hydrocarbons
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    • C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
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Description

【発明の詳細な説明】 本発明はグリース組成物、殊に金属と接触して金属の
腐食を低減させるグリース組成物に関する。
多くのグリースは、油にゲル化剤を添加することによ
り増粘された油である。ほとんどのグリースのために使
用される油は、鉱物油（鉱油）、すなわち炭化水素油で
あるが、合成油のようなその他の油、例えば合成炭化水
素油、ジ（２−エチルヘキシル）セバケートのようなジ
エステル、パーフルオロアルキルエーテル及びシリコー
ン油等もグリースの製造に使用できる。多くのグリース
は、ゲル化剤として、セツケン、一般的にはリチウムセ
ツケンを用いて得られる。しかし、非セツケンタイプの
ゲル化剤は、改善された性質のグリースを生成させるこ
とができ、例えばそのようなグリースは、より高い連続
使用温度において使用されうる。
非セツケンタイプのゲル化剤としては、粘土、ガーボ
ンブラツク、シリカ及びポリウレア（ポリ尿素）等があ
り、これらのすべては好ましくは、微細に粉砕または分
割された固体の形で使用される。微細粉砕粘土、例えば
ベントナイトまたはヘクトライト型の粘土は、鉱油のよ
うな油からグリースを得るための非セツケンゲル化剤と
して使用できる。粘土粒子は、第四アンモニウム化合物
のような有機物質で表面被覆してから用いられるのが普
通である。シリコーン油においては、シリカ充填剤を非
セツケンゲル化剤として使用することができるが、この
目的のための典型的なシリカは、１ミクロン以下の平均
粒径を有するフユームドシリカである。
使用の際に、多くのグリースは、金属ベアリング表面
と接触し、金属は、しばしば腐食を受け易い。金属の腐
食を低減するために、腐食保護を与えるための添加剤を
グリースに添加しうる。しかし、粘土またはシリカのよ
うな非セツケンゲル化剤を含むグリースは、「崩解」
（油とゲル化剤との分離）を受けることがある。腐食保
護を与えるのに有用な添加剤は、非セツケンゲル化剤を
含むグリースの崩解（油／ゲル化剤分離）を起しうる。
亜硝酸ナトリウムが、非セツケン増粘のグリースにおけ
る腐食防止剤として提案されてきている。しかし、多く
のグリースは酸化防止剤としてアミン化合物を含み、こ
のような場合には、発ガン性のニトロソアミン類が形成
される危険があり、従つて亜硝酸ナトリウムの使用は望
ましくない。セバシン酸二ナトリウムは、グリースの崩
解（分離）を促進することなくある程度の腐食保護を与
えるために非セツケン増粘グリース中で使用される。し
かし、この物質は高価であり、従つて非セツケン増粘グ
リースの分離（崩解）を生じさせない代りの腐食防止剤
を見出すことは望ましい。
ここに我々は、ある種の芳香族カルボン酸金属塩が、
非セツケン増粘グリース（セツケン以外のゲル化剤で増
粘されたグリース）の崩解（成分の分離）を生じさせず
に有効な腐食防止をなすことを発見した。
本発明によれば： （ａ） 縮合環系の環原子にカルボン酸基が結合してい
るカルボン酸の一価金属（Ｍ）の塩と、 （ｂ） 非セツケン増粘の鉱油もしくは合成油と、から
なるグリース組成物が提供される。
この明細書においては、縮合環系の環原子にカルボン
酸基が結合しているカルボン酸の一価金属（Ｍ）の塩
を、簡単に「塩」と称することがある。
縮合環系は置換されていても、未置換であつてもよ
い。適当な置換基としては、ハロゲン原子、ヒドロキシ
ル基、ヒドロカルビル基、ヒドロカルボノキシ基、ヒド
ロカルボニル基、またはヒドロカルボニロキシ基等があ
る。縮合環系中に存在する置換基は、カルボン酸基（単
数または複数）以外のものである。置換基は、塩の溶解
特性を改変するようなものであつてよいが、好ましく
は、グリースのベースとして使用される油中での有意な
溶解度を与えるべきでない。従つて、置換基はアルキ
ル、アルケニル、アルコキシまたはアシル基であつてよ
く、好ましくは４個以下の炭素原子を含むものである。
縮合環系が、ヒドロキシル基である少なくとも１個の置
換基を含むときに、有用な効果が得られている。
縮合環系は、一緒に縮合した少なくとも２個の環を含
む。環の一またはそれ以上は、複素原子、例えば窒素原
子を含んでいてよい。本発明による塩は、殊に縮合環系
の少なくとも１個の環が炭化水素環であるものである。
好適な化合物は、縮合環系が炭化水素環系、例えば縮合
芳香族炭化水素環系であるものである。縮合環系がヒド
ロカルビル置換基を含む場合には、そのヒドロカルビル
基とカルボン酸基とが縮合環系、殊に縮合炭化水素環系
の相隣れる炭素原子に結合しているのが好ましい。縮合
環系は、例えば２−ナフトエ酸、３−ヒドロキシ−２−
ナフトエ酸、２−ヒドロキシ−１−ナフトエ酸及び１−
ヒドロキシ−２−ナフトエ酸におけるように、典型的に
はナフタレン環系である。
金属（Ｍ）は一価であり、典型的には、アルカリ金
属、例えばリチウム、カリウム及び特にナトリウムであ
る。我々は２−ナフトエ酸ナトリウム及び３−ヒドロキ
シ−２−ナフトエ酸ナトリウムを用いて有用な結果を得
てきている。塩は微細に粉砕（分割）されているのが好
ましく、一般的には、100μｍ以下の網目を有するふる
いを通過するのに充分な細かさであるのが好ましい。
本発明の組成物は、グリースをも含む。そのグリース
は鉱油をベースにしたものであつてよく、そのようなグ
リースについての非セツケンゲル化剤は微粉砕粘土、特
に親有機性粘土であるのが好ましい。あるいは、グリー
スは合成油をベースにしたものであつてよく、その合成
油は、ポリジオルガノシロキサンのようなシリコーン
油、例えばポリジメチルシロキサンまたはその共重合
体、であつてよい。そのようなグリースのために適当な
増粘剤は、微粉砕したシリカ、殊にフユームドシリカで
ある。
増粘剤が粘土、カーボンブラツク、シリカまたはポリ
ウレアである非セツケン増粘グリースは、市販されてお
り、成分（ａ）である塩はそのようなグリースに配合し
て、認めうるようなグリースの崩解（分離）を生じるこ
となく有用な腐食保護を与えることができる。
成分（ａ）及び（ｂ）からなる本発明の組成物は、塩
以外にグリースに対する添加剤としての他の物質をも含
みうる。これらの他の物質としては、従来腐食防止剤と
して提案されてきているものも包含される。しかしなが
ら、そのような他の物質自体がグリースの崩解（分離）
を引き起すべきでないこと、そして塩と相互作用してグ
リースの崩壊（分離）を引き起すべきでないことは、了
解されよう。グリースの崩壊（分離）が生じるか否か
は、容易に、例えば視覚観察により、あるいは比較的簡
単な試験により判定できる。
本発明組成物は、典型的には、組成物の全容量に対し
て0.1〜30重量％の塩を含み、好ましくは塩は0.1〜５％
（重／容）の量で存在す。
金属塩以外に、本発明の組成物は、酸化防止剤及び極
圧添加剤のようなグリースに普通に配合されるその他の
種々の成分を含みうる。本発明の組成物は、固形分を、
その固体が実質的に溶解されえない液体または可塑性媒
体中に配合するのに有効な任意の方法によつて製造でき
る。グリース中へ塩（好ましくは微細に粉砕された形）
を満足に導入することは、塩と予め作られたグリースと
を一緒に混合することにより、例えば一緒に数分間、典
型的には10分間以下撹拌することにより達成できる。あ
るいは、塩を油の中に配合し、次いでこれを増粘して所
望のグリースを作ることもできる。
本発明のグリース組成物は、グリースについての公知
のいずれの用途にも使用することができ、殊に一般的自
動車用及び高性能ベアリング等のベアリングの用途に使
用できる。
本発明の組成物は、防錆試験のときに、同重量の公知
防錆剤セバシン酸二ナトリウムを含むグリース組成物と
比較して、改善された耐食性を示すことが判明した。
本発明によるグリース組成物を潤滑剤として含むベア
リングは、本発明の別の一特徴をなすものである。
本発明の多様な特徴は、下記の実施例に説明例示され
ている。実施例において「部」及び「％」は特に指示し
ない限り重量基準である。
ナトリウム塩の製造 ２−ナフトエ酸及び３−ヒドロキシ−２−ナフトエ酸
の両者のナトリウム塩を、該酸を等量の水酸化ナトリウ
ム水溶液で中和させて該塩の溶液を得て、これを蒸発乾
固することにより製造した。得られた塩を、300メツシ
ユのふるい（網目間隔約57μｍ）を介して粉砕した。
実施例１及び2. オルガノ粘土グリース試料をベアリングに塗着し、こ
れらのベアリングを、蒸留水を用いてのIP潤滑用グリー
ス防錆試験（IP220）に付した。このグリースは潤滑油
を９％（重／重）の親有機性粘土で増粘することにより
得られたものであり、腐食防止剤を含んでいなかつた。
試験は、１％（重／重）の腐食防止剤を添加したグリー
スの試料、及び腐食防止剤を無添加のグリースの試料を
用いて実施した。腐食防止剤は微細固体の形で用い、グ
リースに手で撹拌混入して配合した。
７日後の試験終了時に、ベアリングを取り出し、グリ
ースを除いて、外側環トラツクの錆及び点食について慎
重に検査し、試験標準に従つて評価した。得られた結果
を表１に示す。
各グリース試料を視覚検査したところ、グリースの成
分分離（崩壊）の明かな兆は示されなかつた。ボーリン
・レオメーターをオツシロモードで用いて得たデータ
は、認めうる崩壊が生じなかつたことを示した。剪断に
よる粘弾性の変化は、腐食防止剤を含むもの及び含まな
いもののすべての試験グリースにおいて実質的に同一で
あつた。
比較として、３−ヒドロキシ−２−ナフトエ酸亜鉛を
用いたときにはEMCOR評価はゼロであつたがグリースの
崩壊は、視覚検査でも、ボーリン・レオメーターを用い
ての試験でも明白であつた。
実施例 3. シリコン油を約８％（重／重）の微細シリカで増粘す
ることにより得たグリースを用いて実施例１及び２の操
作を繰返した。得られた結果を表２に示す。
両グリースを視覚検査及びボーリン・レオメーターで
試験したところ、認めうる崩壊は生じていなかつた。
実施例４及び5. 実施例１及び２のようにして作つたオルガノ粘土増粘
潤滑グリースの各試料に、実施例１及び２の操作を用い
て１％（重／重）の腐食防止剤を添加した。
腐食防止剤を含むグリースの試料及び腐食防止剤を含
まないグリースの試料を、ASTM試験法D1403の1/2スケー
ルの円錐装置及び操作を用いて、潤滑グリース円錐針入
試験に付した。円錐針入試験は、ASTM試験法D1403に記
載の方式でグリース・ワーカー中で25℃とし60回の往復
ストロースに付された後のグリース試料について実施し
た。ASTM試験法D1403に記載の標準式を用いて、測定値
を換算して、完全スケールの円錐装置についての円錐の
ワークド針入度を得た。結果を表３に示す。
ワークド針入度は1mmの1/10単位で示した深さであ
り、これはASTM試験法D1403に記載された条件及び測定
値換算標準式を用いたときに、標準円錐がワークドグリ
ースに針入する深さである。
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｍ 113:02 113:16 119:24 129:50 129:54） Ｃ１０Ｎ 10:02 30:12 50:10

Claims (4)

    (57)【特許請求の範囲】
  1. 【請求項１】（ａ）縮合環系の環原子にカルボン酸基が
    結合しているカルボン酸の一価金属（Ｍ）の塩と、 （ｂ）非セツケン増粘の鉱油もしくは合成油と、からな
    るグリース組成物。
  2. 【請求項２】成分（ａ）が２−ナフトエ酸ナトリウムま
    たは３−ヒドロキシ−２−ナフトエ酸ナトリウムである
    請求項１記載の組成物。
  3. 【請求項３】グリースが粘土、カーボンブラツク、シリ
    カまたはポリウレアで増粘された鉱物もしくは合成油グ
    リースである請求項１または２記載の組成物。
  4. 【請求項４】グリースが親有機性粘土で増粘された鉱物
    油であるか、またはフユームドシリカで増粘されたシリ
    コーン油である請求項４記載の組成物。
JP1263773A 1988-10-26 1989-10-09 グリース組成物 Expired - Lifetime JP2711150B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8825073.3 1988-10-26
GB888825073A GB8825073D0 (en) 1988-10-26 1988-10-26 Grease composition

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JPH02158692A JPH02158692A (ja) 1990-06-19
JP2711150B2 true JP2711150B2 (ja) 1998-02-10

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CA (1) CA2000834C (ja)
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Publication number Priority date Publication date Assignee Title
US5614481A (en) * 1991-12-30 1997-03-25 Lopez Rangel; Victor D. Process for obtaining and manufacturing lubricant greases
US6214778B1 (en) 1995-08-24 2001-04-10 The Lubrizol Corporation Polyurea-thickened grease composition
JP3871390B2 (ja) * 1997-01-27 2007-01-24 株式会社日本礦油 Ａｂｓポンプ用軸受グリース組成物
US5985166A (en) * 1997-10-29 1999-11-16 California Institute Of Technology Chemical etching of fiber probe
US7196042B2 (en) 2002-03-07 2007-03-27 Nsk Ltd. Grease composition and rolling apparatus
JP6543120B2 (ja) * 2015-07-10 2019-07-10 株式会社ニッペコ グリース組成物
CN108048183A (zh) * 2017-12-19 2018-05-18 东莞市肯特润滑技术有限公司 一种合成高温润滑脂

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2182137A (en) * 1937-02-01 1939-12-05 Shell Dev Soda soap grease
US2197832A (en) * 1938-05-07 1940-04-23 Socony Vacuum Oil Co Inc Mineral oil composition
US2223129A (en) * 1940-05-01 1940-11-26 Lubri Zol Corp Lubricant
US2330239A (en) * 1940-11-25 1943-09-28 Lubri Zol Corp Lubricant
US2652364A (en) * 1951-12-29 1953-09-15 Shell Dev High-temperature grease compositions
FR1535153A (fr) * 1966-08-24 1968-08-02 Exxon Research Engineering Co Compositions de graisses renfermant des savons complexes d'aluminium
US3711407A (en) * 1970-11-18 1973-01-16 Exxon Research Engineering Co Incorporating lithium salicylate or the like into a grease
US3761434A (en) * 1971-04-30 1973-09-25 Cities Service Oil Co Petroleum hydrocarbon compositions
US4307027A (en) * 1979-04-09 1981-12-22 Dart Industries Inc. Continuous process for preparing dry metallic salts of higher fatty acids
US4765917A (en) * 1986-10-01 1988-08-23 Acheson Industries, Inc. Water-base metal forming lubricant composition
GB8709896D0 (en) * 1987-04-27 1987-06-03 Ici Plc Composition

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US4929369A (en) 1990-05-29
GR3005683T3 (ja) 1993-06-07
CA2000834C (en) 1999-08-31
ES2034645T3 (es) 1993-04-01
ATE79647T1 (de) 1992-09-15
GB8921998D0 (en) 1989-11-15
EP0366280B1 (en) 1992-08-19
CA2000834A1 (en) 1990-04-26
DE68902532D1 (de) 1992-09-24
GB8825073D0 (en) 1988-11-30
AU622282B2 (en) 1992-04-02
IE893143L (en) 1990-04-26
EP0366280A1 (en) 1990-05-02
DE68902532T2 (de) 1993-01-21
KR0143561B1 (ko) 1998-07-01
JPH02158692A (ja) 1990-06-19
AU4980190A (en) 1991-08-22
KR900006493A (ko) 1990-05-08

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