JPH02120398A - 水−グリコール型作動液 - Google Patents

水−グリコール型作動液

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Publication number
JPH02120398A
JPH02120398A JP63273132A JP27313288A JPH02120398A JP H02120398 A JPH02120398 A JP H02120398A JP 63273132 A JP63273132 A JP 63273132A JP 27313288 A JP27313288 A JP 27313288A JP H02120398 A JPH02120398 A JP H02120398A
Authority
JP
Japan
Prior art keywords
water
glycol
hydraulic fluid
higher fatty
type hydraulic
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
Application number
JP63273132A
Other languages
English (en)
Other versions
JP2812964B2 (ja
Inventor
Hideo Kanamori
英夫 金森
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.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP63273132A priority Critical patent/JP2812964B2/ja
Priority to US07/420,538 priority patent/US5021181A/en
Priority to EP89119782A priority patent/EP0367080B1/en
Priority to DE89119782T priority patent/DE68908340T2/de
Priority to KR1019890015700A priority patent/KR950014395B1/ko
Publication of JPH02120398A publication Critical patent/JPH02120398A/ja
Application granted granted Critical
Publication of JP2812964B2 publication Critical patent/JP2812964B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
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    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/06—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/08—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least 2 hydroxy groups
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    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/38—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
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    • C10M2207/02—Hydroxy compounds
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    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • C10M2219/108—Phenothiazine
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01—Emulsions, colloids, or micelles

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔産業上の利用分野］ 本発明は、水−グリコール型作動液に関し、詳しくは耐
摩耗性が高く、スラッジ溶解性に優れた水−グリコール
型作動液に関する。
〔従来の技術及び発明が解決しようとする課題〕−ＦＩ
Ｑに、水−グリコール型作動液は難燃性であるため、油
圧機器等の各種の作動液として広く使用されているが、
耐摩耗性が不充分であるという問題があった。これを解
決するために、この水−グリコール型作動液に脂肪酸を
配合することが知られている。例えば特公昭６２−５９
１５９号公報には、高級不飽和脂肪酸と高級飽和脂肪酸
とを併用し、これに中和当量以上の水酸化アルカリを配
合することによって、耐摩耗性を向上させた水−グリコ
ール型作動液を調製することが記載されている。
しかしながら、このように高級不飽和脂肪酸を添加して
耐摩耗性を向上させた水−グリコール型作動液は、使用
中に高級不飽和脂肪酸が変質しやすく、その結果スラッ
ジ溶解性が低下して固体骨が析出することがあった。
〔課題を解決するための手段〕
そこで、本発明者は、脂肪酸を含有させて耐摩耗性を向
上させるとともに、その変質を防止してスラッジ溶解性
にも優れた水−グリコール型作動液を開発すべく鋭意研
究を重ねた。その結果、水グリコール型作動液に、高級
脂肪酸と共に特定のアルカリ成分等を一定量加えること
により、所期の目的を達成できることを見出した。本発
明はかかる知見に基いて完成したものである。
すなわち本発明は、水とグリコールとを含有する水−グ
リコール型作動液において、高級脂肪酸を２〜１５重量
％の割合で含有し、かつ該高級脂肪酸の当量未満の水酸
化アルカリと、全体のｐＨを１０〜１２に調整するに足
る量の窒素原子含有有機アルカリ化合物を含有すること
を特徴とする水−グリコール型作動液を提供するもので
ある。
本発明の主体である水−グリコール液としては、従来か
ら一般的に採用されている配合のものを用いることがで
きる。例えば、水３０〜７０重量％。
グリコール７０〜３０重量％からなるもの、さらに所望
により、作動液の粘度を調整するだめの粘度調整剤を、
前記水とグリコールの合計１００重量部に対して、５〜
６０重量部程度含有させたものを用いることができる。
上記グリコールとしては、例えばモノエチレングリコー
ル、ジエチレングリコール、トリエチレングリコール、
モノプロピレングリコール、ジプロピレングリコール、
トリプロピレングリコール。
モノヘキシレングリコール、ジプロピレングリコール、
トリへキシレングリコール等を挙げることができ、これ
らを単独であるいは混合して用いるとかできる０通常は
モノあるいはジプロピレングリコールを用いることが好
ましい。
また粘度調整剤としては、通常はエチレンオキサイド（
ＥＯ）とプロピレンオキサイド（Ｐ　Ｏ）　　との共重
合体が用いられる。この共重合体の平均分子量は、５０
００〜２００００程度が適当であり、さらにＥＯとＰＯ
の比率が１０：１〜１：１０（モル比）程度のものが好
適である。
上記の如く調製された水−グリコール液に加えられる高
級脂肪酸は、従来から用いられているように、炭素数１
０〜２２程度のものであれば、飽和脂肪酸、不飽和脂肪
酸、直鎖脂肪酸１分岐脂肪酸など、各種のものを単独で
あるいは混合して使用することができる。このうち、消
泡性や溶解度等の面から炭素数１２〜１８の飽和脂肪酸
を用いることが好ましい。この高級脂肪酸の配合量は、
全体の２〜１５重量％、好ましくは５〜１２重量％が適
当である。２重世％未満では、得られる作動液の耐摩耗
性が不足し、１５重量％を超えると、水−グリコール液
への溶解性が悪くなり、高級脂肪酸自身が析出するおそ
れがある。
また水酸化アルカリとしては、アルカリ金属の水酸化物
、具体的には、水酸化カリウム、水酸化ナトリウム、水
酸化リチウム等を挙げることができる。この水酸化アル
カリの配合量は、上記高級脂肪酸の当量未満、特に高級
脂肪酸に対するモル比が０．９５〜０．９９５となるよ
うに調整することが好ましい。配合量が少ないと耐摩耗
性が不足しスラッジの溶解性も悪化する。当量以上に加
えたときも同様である。
本発明では、上述の各成分と共に、窒素原子含有有機ア
ルカリ化合物を加えるが、その配合量は系全体のｐＨを
１０〜１２に調節するに足る量とすればよい。この系全
体のｐＨを１０〜１２に調節するに足る量は、各種状況
により異なり、一義的には決定できないが、−ｉには系
全体の０．５〜５重景％とすればよい。
ここで、系全体のｐＨが１０未満であるとスラッジ溶解
性が悪化し、また９Ｈが１２を赳えると耐摩耗性が低下
して好ましくない。このｐＨ調整用に配合される窒素原
子含有有機アルカリ化合物としては、各種のものもを使
用することができるが、例えば、モルホリン、シクロヘ
キシルアミン。
ジシクロヘキシルアミン。ジメチルエタノールアミン、
ジエチルエタノールアミン等を挙げることができ、特に
モルホリン、シクロヘキシルアミンを用いることが好ま
しい。
さらに上記の如く各成分を含有する本発明の水グリコー
ル型作動液には、必要に応じて、各種の添加剤、例えば
金属不活性化剤、消泡剤２着色剤、その他の各種成分を
加えることができる。これらの添加剤の添加量は、従来
とほぼ同様とすることができるが、通常は全体で０．１
〜０．５重量％程度とするのが適当である。ここで上記
金属不活性剤の具体例としては、ベンゾトリアゾール。
メチルベンゾトリアゾール、メルカプトベンゾチアゾー
ル、ベンゾチアゾール、エチレンジアミン四酢酸（ＥＤ
ＴＡ）、ＥＤＴＡニナトリウム塩。
ＥＤＴＡ４ナトリウム塩等を挙げることできるが、通常
はベンゾトリアゾールを用いることが好ましい。
〔実施例〕
次に、本発明を実施例および比較例によりさらに詳しく
説明する。
実施例１〜９及び比較例１〜４ 次表に示すように、高級脂肪酸としてラウリン酸、オレ
イン酸、イソステアリン酸を、水酸化アルカリとして純
度８６．０重量％の水酸化カリウムを、窒素原子含有有
機アルカリ化合物としてモルホリンを、グリコールとし
てプロピレングリコール、ジプロピレングリコールを、
また粘度調整剤として前述のＥＯ−ＰＯ共重合体（ＥＯ
：　ＰＯ＝４：１１分子量約１５０００）を、さらに各
種の添加剤として金属不活性剤、消泡剤９着色剤を用意
し、それぞれを表に示す重量％で水に配合して水−グリ
コール型作動液を調製した。
次いで、それぞれについてＡＳＴＭ　Ｄ　　２２５１に
準拠してポンプテストを行い、その性能を評価した。ポ
ンプにはＶ−１０４Ｃ型を用い、運転条件は、圧力を７
０ｋｇ／ｄ、温度を５０″Ｃ１回転数を１２００ｒｐａ
＋、運転時間を２５０時間とした。
また作動液としての評価は、ポンプのベーンとカムリン
グの摩耗量の合計、浮遊物（スラッジ）発生の有無、液
の外観、透明性、泡立ち性（ＪＩＳＫ２２３１に準拠）
にて行った。液の外観は透明及び浮遊物が観察されなか
ったものを「Ｏ」とし、浮遊物が多少認められるものを
「Δ」、浮遊物が多量に発生したものを「×」として表
示した。尚、ｐＨは、モルホリンで調整を行ったものの
みを表示する。
〔発明の効果〕
以上説明したように、本発明の水−グリコール型作動液
は、耐摩耗性に優れるとともに、スラッジ溶解性にも優
れている。さらに長時間使用した後の液の外観も良好で
あって、また、泡立ちも少ない。
したがって、本発明の水−グリコール型作動液によれば
、ポンプ本体の各部品やフィルター等の交換期間を延長
することができ、またスラッジ溶解性に優れていること
から、固体成分の析出による機器の作動不良も防止する
ことができる。
特許出願人　　出光興産株式会社 ′−’、’−，−−Ｘ１

Claims (3)

    【特許請求の範囲】
  1. （１）水とグリコールとを含有する水−グリコール型作
    動液において、高級脂肪酸を２〜１．５重量％の割合で
    含有し、かつ該高級脂肪酸の当量未満の水酸化アルカリ
    と、全体のｐＨを１０〜１２に調整するに足る量の窒素
    原子含有有機アルカリ化合物を含有することを特徴とす
    る水−グリコール型作動液。
  2. （２）平均分子量５０００〜２００００のエチレンオキ
    サイド−プロピレンオキサイド共重合体を含有する請求
    項１記載の水−グリコール型作動液。
  3. （３）水酸化アルカリと高級脂肪酸の配合比が、前者：
    後者＝０．９５〜０．９９５：１（モル比）である請求
    項１記載の水−グリコール型作動液。
JP63273132A 1988-10-31 1988-10-31 水−グリコール型作動液 Expired - Fee Related JP2812964B2 (ja)

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JP63273132A JP2812964B2 (ja) 1988-10-31 1988-10-31 水−グリコール型作動液
US07/420,538 US5021181A (en) 1988-10-31 1989-10-12 Water-glycol hydraulic fluid
EP89119782A EP0367080B1 (en) 1988-10-31 1989-10-25 Water-glycol hydraulic fluid
DE89119782T DE68908340T2 (de) 1988-10-31 1989-10-25 Wasser-Glycol-Hydraulikflüssigkeit.
KR1019890015700A KR950014395B1 (ko) 1988-10-31 1989-10-30 물-글리콜형 작동액

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Cited By (8)

* Cited by examiner, † Cited by third party
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EP0414645A1 (en) * 1989-08-25 1991-02-27 Dowa Mining Co., Ltd. Permanent magnet alloy having improved resistance to oxidation and process for production thereof
JP2007039570A (ja) * 2005-08-03 2007-02-15 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物及びそれに用いる性状安定化剤
JP2007039569A (ja) * 2005-08-03 2007-02-15 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物及びそれに用いる性状安定化剤
JP2007246684A (ja) * 2006-03-16 2007-09-27 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物
JP2008179658A (ja) * 2007-01-23 2008-08-07 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物及びそれに用いる性状安定化剤
JP2012501371A (ja) * 2008-08-28 2012-01-19 バスフ・コーポレイション 作動液及び蒸気腐食の防止方法
JP2013194190A (ja) * 2012-03-22 2013-09-30 Cci Corp 作動液
JP2015147904A (ja) * 2014-02-07 2015-08-20 ユシロ化学工業株式会社 難燃性作動液組成物

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FR2904829B1 (fr) * 2006-08-08 2012-10-05 Total France Compositions a base d'acides carboxyliques pour protection temporaire de surfaces metalliques et films secs obtenus a partir desdites compositions
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CN102010782A (zh) * 2010-12-14 2011-04-13 上海德润宝特种润滑剂有限公司 一种抗燃液压液组合物及其制备方法
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414645A1 (en) * 1989-08-25 1991-02-27 Dowa Mining Co., Ltd. Permanent magnet alloy having improved resistance to oxidation and process for production thereof
JP2007039570A (ja) * 2005-08-03 2007-02-15 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物及びそれに用いる性状安定化剤
JP2007039569A (ja) * 2005-08-03 2007-02-15 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物及びそれに用いる性状安定化剤
JP2007246684A (ja) * 2006-03-16 2007-09-27 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物
JP2008179658A (ja) * 2007-01-23 2008-08-07 Cosmo Sekiyu Lubricants Kk 含水系潤滑油組成物及びそれに用いる性状安定化剤
JP2012501371A (ja) * 2008-08-28 2012-01-19 バスフ・コーポレイション 作動液及び蒸気腐食の防止方法
JP2013194190A (ja) * 2012-03-22 2013-09-30 Cci Corp 作動液
JP2015147904A (ja) * 2014-02-07 2015-08-20 ユシロ化学工業株式会社 難燃性作動液組成物

Also Published As

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US5021181A (en) 1991-06-04
JP2812964B2 (ja) 1998-10-22
KR900006497A (ko) 1990-05-08
KR950014395B1 (ko) 1995-11-27
EP0367080A1 (en) 1990-05-09
EP0367080B1 (en) 1993-08-11
DE68908340D1 (de) 1993-09-16
DE68908340T2 (de) 1994-02-03

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