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JP4608129B2 - Lubricating oil composition - Google Patents
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JP4608129B2 - Lubricating oil composition - Google Patents

Lubricating oil composition Download PDF

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Publication number
JP4608129B2
JP4608129B2 JP2001142228A JP2001142228A JP4608129B2 JP 4608129 B2 JP4608129 B2 JP 4608129B2 JP 2001142228 A JP2001142228 A JP 2001142228A JP 2001142228 A JP2001142228 A JP 2001142228A JP 4608129 B2 JP4608129 B2 JP 4608129B2
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JP
Japan
Prior art keywords
carbon atoms
weight
parts
lubricating oil
alkyl group
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
JP2001142228A
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Japanese (ja)
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JP2002338983A (en
Inventor
善治 馬場
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.)
Showa Shell Sekiyu KK
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Showa Shell Sekiyu KK
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
Priority to JP2001142228A priority Critical patent/JP4608129B2/en
Application filed by Showa Shell Sekiyu KK filed Critical Showa Shell Sekiyu KK
Priority to US10/477,251 priority patent/US20040214733A1/en
Priority to CNB028097017A priority patent/CN1325620C/en
Priority to EP02745288A priority patent/EP1385926B1/en
Priority to PCT/EP2002/005066 priority patent/WO2002092735A1/en
Priority to ES02745288T priority patent/ES2259375T3/en
Priority to DK02745288T priority patent/DK1385926T3/en
Priority to AT02745288T priority patent/ATE318881T1/en
Priority to CA002447044A priority patent/CA2447044A1/en
Priority to KR1020037014588A priority patent/KR100866811B1/en
Priority to DE60209497T priority patent/DE60209497T2/en
Publication of JP2002338983A publication Critical patent/JP2002338983A/en
Application granted granted Critical
Publication of JP4608129B2 publication Critical patent/JP4608129B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M141/00Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/10Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
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    • C10M141/00Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
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    • C10M129/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26Carboxylic acids; Salts thereof
    • C10M129/28Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/30Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms
    • C10M129/36Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms containing hydroxy groups
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    • C10M129/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26Carboxylic acids; Salts thereof
    • C10M129/28Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/38Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms
    • C10M129/40Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 8 or more carbon atoms monocarboxylic
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    • C10M129/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26Carboxylic acids; Salts thereof
    • C10M129/56Acids of unknown or incompletely defined constitution
    • C10M129/58Naphthenic acids
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    • C10M129/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
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    • C10M135/20Thiols; Sulfides; Polysulfides
    • C10M135/22Thiols; Sulfides; Polysulfides containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
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    • C10M137/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
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    • C10M137/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
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    • C10M2207/02Hydroxy compounds
    • C10M2207/023Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
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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)
  • Lubricants (AREA)

Abstract

A lubricating oil composition is provided containing a major amount of a lubricating oil base oil and a minor amount of an additive combination containing (i) a carboxylic acid-based or carboxylic acid ester based anti-rust agent; (ii) at least one type of amine selected from among the group comprising (A) the alkyl amines which can be represented by general formula (1) (R<1>)nNH3-n (1) wherein R<1 >represents a saturated or unsaturated alkyl group which has from 12 to 30 carbon atoms, and n is an integer of value 1 or 2; and (B) the N-alkylpolyalkylenediamines which can be represented by general formula (2) R<2>NH(CH2)mNH2 (2) wherein R<2 >represents a saturated or unsaturated alkyl group which has from 12 to 30 carbon atoms, and m is an integer of value from 2 to 5.

Description

【0001】
【発明の属する技術分野】
本発明は、水や海水の混入する過酷な使用環境下で優れた防錆性を有するとともに、各種機器に対して耐腐食性と潤滑性の両面でも優れた特性を示す潤滑油組成物に関する。
【0002】
【従来の技術】
潤滑油には、水や海水の混入に際し機械部品を錆から守るため防錆剤が添加されている。一般に、防錆剤は金属表面に防錆皮膜を形成して金属と水との直接接触を妨げて錆の発生を抑制するために金属表面への強い吸着性をもっている。一方、機械装置が高速化、高荷重、高効率化されるに伴って装置の摩擦面は過酷な条件に晒されて潤滑油膜の破断による摩擦面の焼き付きが発生しやすくなっている。このため過酷な条件で使用される潤滑油には摩擦面間の凝着を防止するため摩擦面で金属表面と反応して潤滑性を維持する極圧剤が適量添加されている。ところが、防錆剤の配合は摩擦面での極圧剤と金属表面との反応を阻害して極圧添加剤の効果を大きく損なうことが知られている。
【0003】
【発明が解決しようとする課題】
そこで、本発明の目的は、潤滑油の潤滑性能と防錆性能の両面から、過酷な潤滑条件下でも優れた極圧性能を維持し、且つ優れた防錆性を有する金属を含まない無灰系潤滑油組成物を提供する点にある。
【0004】
【課題を解決するための手段】
本発明者は前記従来の防錆剤による極圧剤の効果低減の欠点を解消するため鋭意研究を進めた結果、特定の防錆剤と特定のアミン類と特定の極圧剤を組み合わせることにより、防錆剤の添加量を大幅に低減させることができ、その結果、防錆剤による極圧性能の低下を最小限に抑制できることを見出し、本発明を完成するに至ったものである。
【0005】
本発明の概要は、(I)潤滑油基油と(II)特定の防錆剤と(III)特定のアミン類と(IV)特定の極圧剤からなる潤滑油組成物において、(III)のアミン類が、1級もしくは2級のアルキルアミン類またはN−アルキルポリアルキレンジアミンで構成されてなることを特徴とする潤滑油組成物である。
【0006】
すなわち、本発明の第1は、
(I)潤滑油基油100重量部に、
(II)アルキルまたはアルケニルこはく酸およびその部分エステル類、炭素数8〜24のサルコシンおよびその誘導体、アルキル化フェノキシ酢酸、N−アシル−N−アルコキシアルキルアスパラギン酸エステル類から選ばれる防錆剤0.001〜0.5重量部、
(III)下式一般式(1)で示されるアルキルアミン類および下記一般式(2)で示されるN−アルキルポリアルキレンジアミン類よりなる群から選ばれた少なくとも1種のアミン類0.001〜0.2重量部、
【化4】

Figure 0004608129
(式中、Rは炭素数12〜30の直鎖の飽和または不飽和のアルキル基であり、nは1または2の整数である。)
【化5】
Figure 0004608129
(式中、Rは炭素数12〜30の直鎖の飽和または不飽和のアルキル基であり、mは2〜5の整数である。)
(IV)極圧剤として、下記一般式(3)で示されるβ−ジチオフォスホリルプロピオン酸0.001〜0.5重量部、
【化6】
Figure 0004608129
(式中、R は炭素数3〜8の分岐アルキル基、R は水素原子および炭素数1〜4の直鎖または分岐アルキル基よりなる群から選ばれた基である。)
を含有させたことを特徴とする潤滑油組成物に関する。
本発明の第は、前記潤滑油基油が、動粘度2〜680mm/s(40℃)、全硫黄分0〜1重量%、全窒素分0〜100ppm、アニリン点80〜130℃を示す石油系および/または合成炭化水素系である請求項1記載の潤滑油組成物に関する。
【0007】
本発明の潤滑油組成物を構成する潤滑油基油成分は、石油系および/または合成炭化水素系を含むものであれば特に制限を受けるものではないが、動粘度は2〜680mm/s(40℃)、好ましくは5〜320mm/s(40℃)、とくに好ましくは8〜220mm/s(40℃)、全硫黄分(重量%)は0〜1%、好ましくは0〜0.3%、全窒素分(重量ppm)は0〜100ppm、好ましくは0〜30ppm、アニリン点は80〜130℃、好ましくは100〜125℃の物性値を示すものが好ましい。
【0008】
本発明で使用される石油系潤滑油基油は、溶剤精製基油、水素化精製基油、高度水素化分解基油などの単独あるいは混合物である。高度水素化分解基油とは、溶剤脱蝋によって分離される素蝋(スラックワックス)を原料として、これを触媒下の水添分解(接触分解)により直鎖パラフィンを分岐パラフィンに異性化することで得られる粘度指数130以上(典型的には145〜155)を有する潤滑油基油、もしくは、天然ガス(メタン等)のガス化プロセス(部分酸化)によって得られる水素と一酸化炭素を原料としてフィッシャートロプシュ重合によって得られる重質直鎖パラフィンとし、これを前述と同様の接触分解異性化することで得られる粘度指数130以上(典型的には145〜155)を有する潤滑油基油である。
【0009】
また、本発明で使用される合成炭化水素系基油は、炭素数3〜15、好ましくは4〜12の範囲の、直鎖状あるいは分岐のオレフィン系炭化水素から選択されたモノマーの単独重合または共重合により得られるオレフィンオリゴマーであることができる。
【0010】
本発明において、石油系潤滑油基油と合成炭化水素系基油はそれぞれ単独にあるいは混合して使用することができる。
【0011】
本発明で使用される防錆剤は、一般に潤滑油に広く使用される公知のものである。
具体的にはアルキルまたはアルケニルこはく酸およびその部分エステル類炭素数8〜24のサルコシンおよびその誘導体、アルキル化フェノキシ酢酸、N−アシル−N−アルコキシアルキルアスパラギン酸エステル類である。
一層具体的な化合物名を下記に示す。
【0012】
サルコシンの誘導体およびアルキル化フェノキシ酢酸の例
ラウリルサルコシン、ミリスチルサルコシン、パルミチルサルコシン、ステアリルサルコシン、オレイルサルコシン、アルキル化(C8〜20)フェノキシ酢酸など。
【0013】
アルキルまたはアルケニルこはく酸およびその部分エステル類、ならびに、N−アシル−N−アルコキシアルキルアスパラギン酸エステル類の例
CAS番号27859−58−1で示されるアルケニル(C20〜100)こはく酸およびその部分エステル、下記構造を有するN−アシル−N−アルコキシアルキルアスパラギン酸エステル類(USP 5275749)など。
【化7】
Figure 0004608129
(式中、R、Rは水素、C1〜30のアルキル基、C1〜30のアシル基および酸化アルキル基よりなる群からそれぞれ独立して選ばれた基であり、R〜R13は水素、およびC1〜30のアルキル基よりなる群からそれぞれ独立して選ばれた基である。)
【0014】
前記一般式(1)で示されるアルキルアミン類のうち、1級アミン類の例としては、ラウリルアミン、ココナットアミン、n−トリデシルアミン、ミリスチルアミン、n−ペンタデシルアミン、パルミチルアミン、n−ヘプタデシルアミン、ステアリルアミン、n−ノナデシルアミン、n−エイコシルアミン、n−ヘンエイコシルアミン、n−ドコシルアミン、n−トリコシルアミン、n−ペンタコシルアミン、オレイルアミン、牛脂アミン、水素化牛脂アミン、大豆アミン等が挙げられる。また2級アミン類の例としては、ジラウリルアミン、ジココナットアミン、ジn−トリデシルアミン、ジミリスチルアミン、ジn−ペンタデシルアミン、ジパルミチルアミン、ジn−ヘプタデシルアミン、ジステアリルアミン、ジn−ノナデシルアミン、ジn−エイコシルアミン、ジn−ヘンエイコシルアミン、ジn−ドコシルアミン、ジn−トリコシルアミン、ジn−ペンタコシルアミン、ジオレイルアミン、ジ牛脂アミン、ジ水素化牛脂アミン、ジ大豆アミン等が挙げられる。
【0015】
前記一般式(2)で示されるN−アルキルポリアルキレンジアミンの例としては、ラウリルエチレンジアミン、ココナットエチレンジアミン、n−トリデシルエチレンジアミン、ミリスチルエチレンジアミン、n−ペンタデシルエチレンジアミン、パルミチルエチレンジアミン、n−ヘプタデシルエチレンジアミン、ステアリルエチレンジアミン、n−ノナデシルエチレンジアミン、n−エイコシルエチレンジアミン、n−ヘンエイコシルエチレンジアミン、n−ドコシルエチレンジアミン、n−トリコシルエチレンジアミン、n−ペンタコシルエチレンジアミン、オレイルエチレンジアミン、牛脂エチレンジアミン、水素化牛脂エチレンジアミン、大豆エチレンジアミン等のエチレンジアミン類;ラウリルプロピレンジアミン、ココナットプロピレンジアミン、n−トリデシルプロピレンジアミン、ミリスチルプロピレンジアミン、n−ペンタデシルプロピレンジアミン、パルミチルプロピレンジアミン、n−ヘプタデシルプロピレンジアミン、ステアリルプロピレンジアミン、n−ノナデシルプロピレンジアミン、n−エイコシルプロピレンジアミン、n−ヘンエイコシルプロピレンジアミン、n−ドコシルプロピレンジアミン、n−トリコシルプロピレンジアミン、n−ペンタコシルプロピレンジアミン、オレイルプロピレンジアミン、牛脂プロピレンジアミン、水素化牛脂プロピレンジアミン、大豆プロピレンジミン等のプロピレンジアミン類;ラウリルブチレンジアミン、ココナットブチレンジアミン、n−トリデシルブチレンジアミン、ミリスチルブチレンジアミン、n−ペンタデシルブチレンジアミン、パルミチルブチレンジアミン、n−ヘプタデシルブチレンジアミン、ステアリルブチレンジアミン、n−ノナデシルブチレンジアミン、n−エイコシルブチレンジアミン、n−ヘンエイコシルブチレンジアミン、n−ドコシルブチレンジアミン、n−トリコシルブチレンジアミン、n−ペンタコシルブチレンジアミン、オレイルブチレンジアミン、牛脂ブチレンジアミン、水素化牛脂ブチレンジアミン、大豆ブチレンジアミン等のブチレンジアミン類;ラウリルペンチレンジアミン、ココナットペンチレンジアミン、ミリスチルペンチレンジアミン、パルミチルペンチレンジアミン、ステアリルペンチレンジアミン、オレイルペンチレンジアミン、牛脂ペンチレンジアミン、水素化牛脂ペンチレンジアミン、大豆ペンチレンジアミン等のペンチレンジアミン類などが挙げられる。
【0016】
本発明では、極圧剤として、前記一般式(3)で示されるβ−ジチオフォスホリルプロピオン酸を用いる。
これらの極圧剤の配合量は、0.001〜0.5重量部とする。
本発明では前記の必須成分のほかに更に性能を向上させるため、必要に応じて通常使用される種々の追加的添加剤が適宜使用できる。これらには、酸化防止剤、金属不活性剤、極圧剤、消泡剤、粘度指数向上剤、流動点降下剤、清浄分散剤、防錆剤、抗乳化剤等の公知の潤滑油添加剤を添加することができる。
【0017】
アミン系酸化防止剤としては、p,p′−ジオクチル−ジフェニルアミン(精工化学社製:ノンフレックスOD−3)、p,p′−ジ−α−メチルベンジル−ジフェニルアミン、N−p−ブチルフェニル−N−p′−オクチルフェニルアミンなどのジアルキル−ジフェニルアミン類;モノ−t−ブチルジフェニルアミン、モノオクチルジフェニルアミンなどのモノアルキルジフェニルアミン類;ジ(2,4−ジエチルフェニル)アミン、ジ(2−エチル−4−ノニルフェニル)アミンなどのビス(ジアルキルフェニル)アミン類;オクチルフェニル−1−ナフチルアミン、N−t−ドデシルフェニル−1−ナフチルアミンなどのアルキルフェニル−1−ナフチルアミン類;1−ナフチルアミン、フェニル−1−ナフチルアミン、フェニル−2−ナフチルアミン、N−ヘキシルフェニル−2−ナフチルアミン、N−オクチルフェニル−2−ナフチルアミンなどのアリール−ナフチルアミン類、N,N′−ジイソプロピル−p−フェニレンジアミン、N,N′−ジフェニル−p−フェニレンジアミンなどのフェニレンジアミン類;フェノチアジン(保土谷化学社製:Phenothiazine)、3,7−ジオクチルフェノチアジンなどのフェノチアジン類などが挙げられる。
【0018】
硫黄系酸化防止剤としては、ジドデシルサルファイド、ジオクタデシルサルファイドなどのジアルキルサルファイド類;ジドデシルチオジプロピオネート、ジオクタデシルチオジプロピオネート、ジミリスチルチオジプロピオネート、ドデシルオクタデシルチオジプロピオネートなどのチオジプロピオン酸エステル類;2−メルカプトベンゾイミダゾールなどが挙げられる。
【0019】
フェノール系酸化防止剤としては、2−t−ブチルフェノール、2−t−ブチル−4−メチルフェノール、2−t−ブチル−5−メチルフェノール、2,4−ジ−t−ブチルフェノール、2,4−ジメチル−6−t−ブチルフェノール、2−t−ブチル−4−メトキシフェノール、3−t−ブチル−4−メトキシフェノール、2,5−ジ−t−ブチルヒドロキノン(川口化学社製:アンテージDBH)、2,6−ジ−t−ブチルフェノール、2,6−ジ−t−ブチル−4−メチルフェノール、2,6−ジ−t−ブチル−4−エチルフェノールなどの2,6−ジ−t−ブチル−4−アルキルフェノール類;2,6−ジ−t−ブチル−4−メトキシフェノール、2,6−ジ−t−ブチル−4−エトキシフェノールなどの2,6−ジ−t−ブチル−4−アルコキシフェノール類;3,5−ジ−t−ブチル−4−ヒドロキシベンジルメルカプト−オクチルアセテート、n−オクタデシル−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート(吉富製薬社製:ヨシノックス SS)、n−ドデシル−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート、2′−エチルヘキシル−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネートなどのアルキル−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート類;2,6−ジ−t−ブチル−α−ジメチルアミノ−p−クレゾール、2,2′−メチレンビス(4−メチル−6−t−ブチルフェノール)(川口化学社製:アンテージW−400)、2,2′−メチレンビス(4−エチル−6−t−ブチルフェノール)(川口化学社製:アンテージW−500)などの2,2′−メチレンビス(4−アルキル−6−t−ブチルフェノール)類;4,4′−ブチリデンビス(3−メチル−6−t−ブチルフェノール)(川口化学社製:アンテージW−300)、4,4′−メチレンビス(2,6−ジ−t−ブチルフェノール)(シェル・ジャパン社製:Ionox 220AH)、4,4′−ビス(2,6−ジ−t−ブチルフェノール)、2,2−(ジ−p−ヒドロキシフェニル)プロパン(シェル・ジャパン社製:ビスフェノールA)、2,2−ビス(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロパン、4,4′−シクロヘキシリデンビス(2,6−t−ブチルフェノール)、ヘキサメチレングリコールビス[3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート](チバ・スペシャルティ・ケミカルズ社製:Irganox L109)、トリエチレングリコールビス[3−(3−t−ブチル−4−ヒドロキシ−5−メチルフェニル)プロピオネート](吉富製薬社製:トミノックス 917)、2,2′−チオ−[ジエチル−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート](チバ・スペシャルティ・ケミカルズ社製:Irganox L115)、3,9−ビス{1,1−ジメチル−2−[3−(3−t−ブチル−4−ヒドロキシ−5−メチルフェニル)プロピオニルオキシ]エチル}2,4,8,10−テトラオキサスピロ[5,5]ウンデカン(住友化学:スミライザーGA80)、4,4′−チオビス(3−メチル−6−t−ブチルフェノール)(川口化学社製:アンテージRC)、2,2′−チオビス(4,6−ジ−t−ブチル−レゾルシン)などのビスフェノール類;テトラキス[メチレン−3−(3,5−ジ−t−ブチル−4−ヒドロキシフェニル)プロピオネート]メタン(チバ・スペシャルティ・ケミカルズ社製:Irganox L101)、1,1,3−トリス(2−メチル−4−ヒドロキシ−5−t−ブチルフェニル)ブタン(吉富製薬社製:ヨシノックス 930)、1,3,5−トリメチル−2,4,6−トリス(3,5−ジ−t−ブチル−4−ヒドロキシベンジル)ベンゼン(シェル・ジャパン社製:Ionox 330)、ビス−[3,3′−ビス−(4′−ヒドロキシ−3′−t−ブチルフェニル)ブチリックアシッド]グリコールエステル、2−(3′,5′−ジ−t−ブチル−4−ヒドロキシフェニル)メチル−4−(2″,4″−ジ−t−ブチル−3″−ヒドロキシフェニル)メチル−6−t−ブチルフェノール、2,6−ビス(2′−ヒドロキシ−3′−t−ブチル−5′−メチル−ベンジル)−4−メチルフェノールなどのポリフェノール類;p−t−ブチルフェノールとホルムアルデヒドの縮合体、p−t−ブチルフェノールとアセトアルデヒドの縮合体などのフェノールアルデヒド縮合体などが挙げられる。
【0020】
リン系酸化防止剤として、トリフェニルフォスファイト、トリクレジルフォスファイトなどのトリアリールフォスファイト類、トリオクタデシルフォスファイト、トリデシルフォスファイトなどのトリアルキルフォスファイト類、トリドデシルトリチオフォスファイトなどが挙げられる。
【0021】
これらの酸化防止剤は、基油100重量部に対して、0.01〜2.0重量部の範囲で単独又は複数組み合わせて使用できる。
【0022】
本発明の組成物と併用できる金属不活性剤としては、ベンゾトリアゾール、4−メチル−ベンゾトリアゾール、4−エチル−ベンゾトリアゾールなどの4−アルキル−ベンゾトリアゾール類;5−メチル−ベンゾトリアゾール、5−エチル−ベンゾトリアゾールなどの5−アルキル−ベンゾトリアゾール、1−ジオクチルアミノメチル−2,3−ベンゾトリアゾールなどの1−アルキル−ベンゾトリアゾール類;1−ジオクチルアミノメチル−2,3−トルトリアゾールなどの1−アルキル−トルトリアゾール類等のベンゾトリアゾール誘導体;ベンゾイミダゾール、2−(オクチルジチオ)−ベンゾイミダゾール、2−(デシルジチオ)−ベンゾイミダゾール、2−(ドデシルジチオ)−ベンゾイミダゾールなどの2−(アルキルジチオ)−ベンゾイミダゾール類;2−(オクチルジチオ)−トルイミダゾール、2−(デシルジチオ)−トルイミダゾール、2−(ドデシルジチオ)−トルイミダゾールなどの2−(アルキルジチオ)−トルイミダゾール類等のベンゾイミダゾール誘導体;インダゾール、4−アルキル−インダゾール、5−アルキル−インダゾールなどのトルインダゾール類等のインダゾール誘導体;ベンゾチアゾール、2−メルカプトベンゾチアゾール誘導体(千代田化学社製:チオライトB−3100)、2−(ヘキシルジチオ)ベンゾチアゾール、2−(オクチルジチオ)ベンゾチアゾールなどの2−(アルキルジチオ)ベンゾチアゾール類;2−(ヘキシルジチオ)トルチアゾール、2−(オクチルジチオ)トルチアゾールなどの2−(アルキルジチオ)トルチアゾール類;2−(N,N−ジエチルジチオカルバミル)ベンゾチアゾール、2−(N,N−ジブチルジチオカルバミル)−ベンゾチアゾール、2−(N,N−ジヘキシルジチオカルバミル)−ベンゾチアゾールなど2−(N,N−ジアルキルジチオカルバミル)ベンゾチアゾール類;2−(N,N−ジエチルジチオカルバミル)トルチアゾール、2−(N,N−ジブチルジチオカルバミル)トルチアゾール、2−(N,N−ジヘキシルジチオカルバミル)トルチアゾールなどの2−(N,N−ジアルキルジチオカルバミル)−トルゾチアゾール類等のベンゾチアゾール誘導体;2−(オクチルジチオ)ベンゾオキサゾール、2−(デシルジチオ)ベンゾオキサゾール、2−(ドデシルジチオ)ベンゾオキサゾールなどの2−(アルキルジチオ)−ベンゾオキサゾール類;2−(オクチルジチオ)トルオキサゾール、2−(デシルジチオ)トルオキサゾール、2−(ドデシルジチオ)トルオキサゾールなどの2−(アルキルジチオ)トルオキサゾール類等のベンゾオキサゾール誘導体;2,5−ビス(ヘプチルジチオ)−1,3,4−チアジアゾール、2,5−ビス(ノニルジチオ)−1,3,4−チアジアゾール、2,5−ビス(ドデシルジチオ)−1,3,4−チアジアゾール、2,5−ビス(オクタデシルジチオ)−1,3,4−チアジアゾールなどの2,5−ビス(アルキルジチオ)−1,3,4−チアジアゾール類;2,5−ビス(N,N−ジエチルジチオカルバミル)−1,3,4−チアジアゾール、2,5−ビス(N,N−ジブチルジチオカルバミル)−1,3,4−チアジアゾール、2,5−ビス(N,N−ジオクチルジチオカルバミル)−1,3,4−チアジアゾールなどの2,5−ビス(N,N−ジアルキルジチオカルバミル)−1,3,4−チアジアゾール類;2−N,N−ジブチルジチオカルバミル−5−メルカプト−1,3,4−チアジアゾール、2−N,N−ジオクチルジチオカルバミル−5−メルカプト−1,3,4−チアジアゾールなどの2−N,N−ジアルキルジチオカルバミル−5−メルカプト−1,3,4−チアジアゾール類等のチアジアゾール誘導体;1−ジ−オクチルアミノメチル−2,4−トリアゾールなどの1−アルキル−2,4−トリアゾール類等のトリアゾール誘導体などが挙げられる。
【0023】
これらの金属不活性剤は、基油100重量部に対して、0.01〜0.5重量部の範囲で単独又は複数組み合わせて使用できる。
【0024】
消泡剤として使用されるものは、例えばジメチルポリシロキサン、ジエチルシリケート、フルオロシリコーン等のオルガノシリケート類、ポリアルキルアクリレート等の非シリコーン系消泡剤などが挙げられる。その添加量は、基油100重量部に対して、0.0001〜0.1重量部の範囲で単独又は複数組み合わせて使用できる。
【0025】
粘度指数向上剤としては、例えばポリメタクリレート類やエチレン−プロピレン共重合体、スチレン−ジエン共重合体などのオレフィンコポリマー類等の非分散型粘度指数向上剤や、これらに含窒素モノマーを共重合させた分散型粘度指数向上剤等が挙げられる。その添加量は、基油100重量部に対して、0.05〜20重量部の範囲で単独又は複数組み合わせて使用できる。
【0026】
流動点降下剤としては、例えばポリメタクリレート系のポリマーなどが挙げられる。その添加量は、基油100重量部に対して、0.01〜5重量部の範囲で使用できる。
【0027】
清浄分散剤としては、例えば中性または塩基性のアルカリ土類金属スルホネート、アルカリ土類金属フェネート、アルカリ土類金属サリシレート等の金属系清浄剤や、アルケニルコハク酸イミド、アルケニルコハク酸エステルもしくはそのホウ素化合物、硫黄化合物等による変性品等の無灰分散剤等が挙げられる。その添加量は、基油100重量部に対して、0.01〜1重量部の範囲で単独又は複数組み合わせて使用できる。
【0028】
極圧剤としては、ジアルキルサルファイド、ジベンジルサルファイド、ジアルキルポリサルファイド、ジベンジルジサルファイド、アルキルメルカプタン、ジベンゾチオフェン、2,2′−ジチオビス(ベンゾチアゾール)等の硫黄系極圧剤;トリアルキルフォスフェート、トリアリールフォスフェート、トリアルキルフォスフォネート、トリアルキルフォスファイト、トリアリールフォスファイト、ジアルキルハイドロゼンフォスファイト等のリン系極圧剤;ジアルキルジチオりん酸亜鉛、ジアルキルジチオりん酸、トリアルキルジチオりん酸エステル、酸性チオりん酸エステル、トリアルキルトリチオフォスファイト等のりん・硫黄系極圧剤が使用できる。これらの極圧剤は、基油100重量部に対して、0.1〜2重量部の範囲で単独又は複数組み合わせて使用できる。
【0029】
抗乳化剤としては、通常潤滑油添加剤として使用される公知のものが挙げられる。その添加量は、基油100重量部に対して、0.0005〜0.5重量部の範囲で使用できる。
【0030】
【実施例】
以下、本発明を具体的に説明するが、本発明はこれらの実施例により何ら限定されるものでない。基油として40℃での動粘度が31mm/s、粘度指数が107、硫黄分が5ppm以下、窒素分が1ppm以下、アニリン点が112℃の水素化精製基油に、表1に示す極圧剤と防錆剤とアミンを各種の濃度で配合して試料油を調整し、本発明の効果を防錆剤性能と極圧性能の両面から調べた。実施例および比較例における各種性能試験方法は下記に示すとおりである。
【0031】
防錆試験
試料油の防錆性能を評価するため、ASTM D665に準拠して、人工海水の存在下に60℃で24時間の防錆試験を行い、試験後の鋼試験片に錆が発生するか否かを調べた。
【0032】
FZG歯車試験
試料油の歯車装置に対する潤滑性能を評価するため、ISO/WD14635−1に準拠して、試験歯車Aを用いて、初期油温90℃、モータ回転数1450rpmの条件で各荷重段階毎に15分の運転を行い、荷重段階を増加させながら試験歯車の歯面に焼き付きが発生するまでの荷重段階を測定した。
【0033】
実施例1〜参考例1〜3、比較例1〜
これらの組成と試験結果を表1〜3に示す。
【0034】
【表1】
Figure 0004608129
【0035】
【表2】
Figure 0004608129
【0036】
【表3】
Figure 0004608129
注)
(1)ルーブリゾール社製 ルブリゾール859
(2)チバ ペシャルティ ケミカルズ社製 サルコシルO
(3)チバ スペシャルティ ケミカルズ社製 イルガコア NPA
(4)コロニアル ケミカル社製 コラコア 93
CAS No.68906−34−3、27136−73−8
(5)キングインダストー社製 K−CORR 100
P5275749(Jan.4.1994)記載の防錆剤
【0037】
比較例1は極圧剤のみの配合で歯車試験において良好な極圧性能を示すが、防錆剤とアミンが添加されていないので防錆試験では錆を発生させる。しかし、比較例3〜では、防錆剤が最小必要量添加されているため、防錆試験では錆の発生はなかったものの、防錆剤の添加によりFZG歯車試験で著しい耐荷重能の低下が生じることが分かる。また、比較例2は極圧剤とアミンが添加されて防錆剤の配合がないため十分な防錆効果が得られない。
実施例1〜では、極圧剤と防錆剤とアミンの相乗効果により、大幅に防錆剤の必要添加量を低減でき、防錆剤による極圧性能の低下を大幅に改善できる。
【0038】
【発明の効果】
(1)本発明の潤滑油組成物は、環境や安全性の面から有害な金属をほとんどあるいは全く含有せず、かつ近年の産業機械の高速化、高圧化、コンパクト化、耐久性の向上に対応して、良好な防錆性能を維持してなお極圧性能を有する潤滑油組成物を提供することができる。また、本発明によって防錆剤の添加量を低減できるため、優れた性能を有する潤滑油組成物を安価に提供できる。
(2)本発明の潤滑油組成物は、油圧作動油、歯車油、圧縮機油、タービン油、軸受油として使用する防錆性能と極圧性能を要求される潤滑油組成物として有用である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lubricating oil composition that has excellent rust prevention properties under severe use environments mixed with water and seawater, and also exhibits excellent characteristics in terms of both corrosion resistance and lubricity with respect to various devices.
[0002]
[Prior art]
A rust inhibitor is added to the lubricating oil in order to protect the machine parts from rust when water or seawater is mixed. In general, the rust preventive agent has a strong adsorptivity to the metal surface in order to prevent rust generation by forming a rust preventive film on the metal surface to prevent direct contact between the metal and water. On the other hand, as the speed of the machine is increased, the load is increased, and the efficiency is increased, the friction surface of the device is exposed to severe conditions, and the friction surface is easily seized due to the breakage of the lubricating oil film. For this reason, an appropriate amount of an extreme pressure agent that maintains the lubricity by reacting with the metal surface on the friction surface is added to the lubricating oil used under severe conditions in order to prevent adhesion between the friction surfaces. However, it is known that the blending of the rust preventive agent greatly impairs the effect of the extreme pressure additive by inhibiting the reaction between the extreme pressure agent on the friction surface and the metal surface.
[0003]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to maintain the excellent extreme pressure performance even under severe lubrication conditions from both the lubrication performance and the rust prevention performance of the lubricating oil, and to contain no metal having an excellent rust prevention property. The present invention provides a lubricating oil composition.
[0004]
[Means for Solving the Problems]
The present inventors have result of our extensive studies in order to overcome the drawbacks of the effects reduction of extreme pressure by the conventional corrosion inhibitor, combining certain extreme pressure agent and a specific rust preventive and specific A Min acids Thus, the addition amount of the rust inhibitor can be greatly reduced, and as a result, it has been found that a decrease in extreme pressure performance due to the rust inhibitor can be minimized, and the present invention has been completed.
[0005]
The present invention provides a lubricating oil composition comprising (I) a lubricating base oil, (II) a specific rust inhibitor, (III) a specific amine, and (IV) a specific extreme pressure agent. a Min such is a lubricating oil composition characterized by comprising consists of a primary or secondary alkyl amines or N- alkyl polyalkylene amines.
[0006]
That is, the first of the present invention is
(I) To 100 parts by weight of lubricating base oil,
(II) Rust preventive agent selected from alkyl or alkenyl succinic acid and partial esters thereof, sarcosine having 8 to 24 carbon atoms and derivatives thereof, alkylated phenoxyacetic acid, and N-acyl-N-alkoxyalkylaspartic acid esters . 001 to 0.5 parts by weight,
(III) At least one amine selected from the group consisting of alkylamines represented by the following general formula (1) and N-alkylpolyalkylenediamines represented by the following general formula (2) 0.001 to 0.001 0.2 parts by weight,
[Formula 4]
Figure 0004608129
(In the formula, R 1 is a linear saturated or unsaturated alkyl group having 12 to 30 carbon atoms, and n is an integer of 1 or 2.)
[Chemical formula 5]
Figure 0004608129
(In the formula, R 2 is a linear saturated or unsaturated alkyl group having 12 to 30 carbon atoms, and m is an integer of 2 to 5.)
(IV) As an extreme pressure agent, 0.001 to 0.5 parts by weight of β-dithiophosphorylpropionic acid represented by the following general formula (3),
[Chemical 6]
Figure 0004608129
(In the formula, R 3 is a branched alkyl group having 3 to 8 carbon atoms, and R 4 is a group selected from the group consisting of a hydrogen atom and a linear or branched alkyl group having 1 to 4 carbon atoms.)
It is related with the lubricating oil composition characterized by including.
In the second aspect of the present invention, the lubricating base oil has a kinematic viscosity of 2 to 680 mm 2 / s (40 ° C.), a total sulfur content of 0 to 1% by weight, a total nitrogen content of 0 to 100 ppm, and an aniline point of 80 to 130 ° C. a lubricating oil composition of claim 1 Symbol mounting a petroleum and / or synthetic hydrocarbon shown.
[0007]
The lubricating base oil component constituting the lubricating oil composition of the present invention is not particularly limited as long as it contains a petroleum system and / or a synthetic hydrocarbon system, but has a kinematic viscosity of 2 to 680 mm 2 / s. (40 ° C.), preferably 5 to 320 mm 2 / s (40 ° C.), particularly preferably 8 to 220 mm 2 / s (40 ° C.), and the total sulfur content (wt%) is 0 to 1%, preferably 0 to 0 .3%, the total nitrogen content (weight ppm) is 0 to 100 ppm, preferably 0 to 30 ppm, and the aniline point is 80 to 130 ° C., preferably 100 to 125 ° C.
[0008]
The petroleum-based lubricating base oil used in the present invention is a solvent refined base oil, a hydrorefined base oil, a highly hydrocracked base oil or the like alone or as a mixture. Advanced hydrocracking base oil is a raw material of raw wax (slack wax) separated by solvent dewaxing and isomerizing linear paraffin into branched paraffin by hydrocracking (catalytic cracking) under the catalyst. From the base oil of hydrogen and carbon monoxide obtained by a gasification process (partial oxidation) of a lubricating base oil having a viscosity index of 130 or more (typically 145 to 155) obtained in (1) or natural gas (methane, etc.) It is a lubricating base oil having a viscosity index of 130 or more (typically 145 to 155) obtained by converting the heavy linear paraffin obtained by Fischer-Tropsch polymerization into the same catalytic cracking isomerization as described above.
[0009]
The synthetic hydrocarbon base oil used in the present invention is a homopolymerization of a monomer selected from linear or branched olefinic hydrocarbons having 3 to 15 carbon atoms, preferably 4 to 12 carbon atoms. It can be an olefin oligomer obtained by copolymerization.
[0010]
In the present invention, the petroleum-based lubricating base oil and the synthetic hydrocarbon-based base oil can be used alone or in combination.
[0011]
Proof Sabizai that are used in the present invention are those known to be widely used in lubricating oil in General.
Specifically , alkyl or alkenyl succinic acid and partial esters thereof , sarcosine having 8 to 24 carbon atoms and derivatives thereof, alkylated phenoxyacetic acid, and N-acyl-N-alkoxyalkylaspartic acid esters .
More specific compound names are shown below.
[0012]
Example lauryl sarcosinate down sarcosine derivatives and alkylated phenoxy acetic, myristyl sarcosinate down, palmityl sarcosinates down, stearyl sarcosinates down, oleyl sarcosine, alkylated (C8~20) etc. phenoxy vinegar acid.
[0013]
Examples of alkyl or alkenyl succinic acid and its partial esters, and N-acyl-N-alkoxyalkyl aspartic acid esters Alkenyl (C20-100) succinic acid and its partial esters represented by CAS No. 27858-58-1 , under SL having the structure N- acyl -N- alkoxyalkyl aspartate ester (USP 5275749), etc..
[Chemical 7]
Figure 0004608129
(Wherein R 7 and R 8 are groups independently selected from the group consisting of hydrogen, a C1-30 alkyl group, a C1-30 acyl group and an alkyl oxide group, and R 9 to R 13 are These are groups independently selected from the group consisting of hydrogen and C1-30 alkyl groups.)
[0014]
Examples of primary amines among the alkylamines represented by the general formula (1) include laurylamine, coconutamine, n-tridecylamine, myristylamine, n-pentadecylamine, palmitylamine, n-heptadecylamine, stearylamine, n-nonadecylamine, n-eicosylamine, n-heneicosylamine, n-docosylamine, n-tricosylamine, n-pentacosylamine, oleylamine, tallow amine, hydrogenated tallow amine And soy amine. Examples of secondary amines include dilaurylamine, dicoconutamine, di-n-tridecylamine, dimyristylamine, di-n-pentadecylamine, dipalmitylamine, di-n-heptadecylamine, di- Stearylamine, di-n-nonadecylamine, di-n-eicosylamine, di-n-henecosylamine, di-n-docosylamine, di-n-tricosylamine, di-n-pentacosylamine, dioleylamine, di-tallowamine, dihydrogen Examples include tallow amine and disodium amine.
[0015]
Examples of the N-alkylpolyalkylenediamine represented by the general formula (2) include laurylethylenediamine, coconutethylenediamine, n-tridecylethylenediamine, myristylethylenediamine, n-pentadecylethylenediamine, palmitylethylenediamine, and n-heptadecyl. Ethylenediamine, stearylethylenediamine, n-nonadecylethylenediamine, n-eicosylethylenediamine, n-henecosylethylenediamine, n-docosylethylenediamine, n-tricosylethylenediamine, n-pentacosylethylenediamine, oleylethylenediamine, tallow ethylenediamine, hydrogen Ethylenediamines such as modified tallow ethylenediamine and soybean ethylenediamine; laurylpropylenediamine, coconut Lopylene diamine, n-tridecyl propylene diamine, myristyl propylene diamine, n-pentadecyl propylene diamine, palmityl propylene diamine, n-heptadecyl propylene diamine, stearyl propylene diamine, n-nonadecyl propylene diamine, n-eicosyl propylene diamine N-heneicosyl propylene diamine, n-docosyl propylene diamine, n-tricosyl propylene diamine, n-pentacosyl propylene diamine, oleyl propylene diamine, beef tallow propylene diamine, hydrogenated tallow propylene diamine, soy propylene dimine, etc. Propylene diamines; lauryl butylene diamine, coconut butylene diamine, n-tridecyl butylene diamine, myristyl butylene diamine, -Pentadecyl butylene diamine, palmityl butylene diamine, n-heptadecyl butylene diamine, stearyl butylene diamine, n-nonadecyl butylene diamine, n-eicosyl butylene diamine, n-heneicosyl butylene diamine, n-docosyl butylene diamine Butylene diamines such as n-tricosyl butylene diamine, n-pentacosyl butylene diamine, oleyl butylene diamine, beef tallow butylene diamine, hydrogenated beef tallow butylene diamine, soybean butylene diamine, lauryl pentylene diamine, coconut pentylene diamine, Myristyl pentylene diamine, palmityl pentylene diamine, stearyl pentylene diamine, oleyl pentylene diamine, beef tallow pentylene diamine, hydrogenated beef tallow pentylene diamine And pentylene diamines such as soybean pentylene diamine and the like.
[0016]
In the present invention, β-dithiophosphorylpropionic acid represented by the general formula (3) is used as the extreme pressure agent.
The amount of these extreme pressure agents is 0.001 to 0.5 parts by weight.
In the present invention, in addition to the essential components described above, various additional additives that are usually used can be used as appropriate in order to further improve the performance. These include known lubricating oil additives such as antioxidants, metal deactivators, extreme pressure agents, antifoaming agents, viscosity index improvers, pour point depressants, cleaning dispersants, rust inhibitors, demulsifiers, etc. Can be added.
[0017]
Examples of amine-based antioxidants include p, p′-dioctyl-diphenylamine (Seiko Chemical Co., Ltd .: Nonflex OD-3), p, p′-di-α-methylbenzyl-diphenylamine, Np-butylphenyl- Dialkyl-diphenylamines such as Np'-octylphenylamine; monoalkyldiphenylamines such as mono-t-butyldiphenylamine and monooctyldiphenylamine; di (2,4-diethylphenyl) amine, di (2-ethyl-4 -Bis (dialkylphenyl) amines such as nonylphenyl) amine; alkylphenyl-1-naphthylamines such as octylphenyl-1-naphthylamine, Nt-dodecylphenyl-1-naphthylamine; 1-naphthylamine, phenyl-1- Naphthylamine, phenyl-2 Aryl-naphthylamines such as naphthylamine, N-hexylphenyl-2-naphthylamine, N-octylphenyl-2-naphthylamine, N, N'-diisopropyl-p-phenylenediamine, N, N'-diphenyl-p-phenylenediamine, etc. And phenothiazines such as phenothiazine (Hodogaya Chemical Co., Ltd .: Phenothiazine) and 3,7-dioctylphenothiazine.
[0018]
Examples of sulfur-based antioxidants include dialkyl sulfides such as didodecyl sulfide and dioctadecyl sulfide; Thiodipropionic acid esters; 2-mercaptobenzimidazole and the like.
[0019]
Examples of phenolic antioxidants include 2-t-butylphenol, 2-t-butyl-4-methylphenol, 2-t-butyl-5-methylphenol, 2,4-di-t-butylphenol, 2,4- Dimethyl-6-t-butylphenol, 2-t-butyl-4-methoxyphenol, 3-t-butyl-4-methoxyphenol, 2,5-di-t-butylhydroquinone (manufactured by Kawaguchi Chemical Co., Ltd .: Antage DBH), 2,6-di-t-butylphenol such as 2,6-di-t-butylphenol, 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butyl-4-ethylphenol -4-alkylphenols; 2,6-di-t-butyl- such as 2,6-di-t-butyl-4-methoxyphenol and 2,6-di-t-butyl-4-ethoxyphenol -Alkoxyphenols; 3,5-di-t-butyl-4-hydroxybenzylmercapto-octyl acetate, n-octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate (Yoshitomi Pharmaceutical) Manufactured by Yoshinox SS), n-dodecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2'-ethylhexyl-3- (3,5-di-t-butyl-4) Alkyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionates such as 2-hydroxyphenyl) propionate; 2,6-di-t-butyl-α-dimethylamino-p-cresol, 2 2,2'-methylenebis (4-methyl-6-t-butylphenol) (manufactured by Kawaguchi Chemical Co., Ltd .: Antage W-400), 2,2'-methyl 2,2'-methylenebis (4-alkyl-6-t-butylphenol) such as bis (4-ethyl-6-t-butylphenol) (manufactured by Kawaguchi Chemical Co., Ltd .: Antage W-500); 4,4'-butylidenebis (3-methyl-6-t-butylphenol) (manufactured by Kawaguchi Chemical Co., Ltd .: Antage W-300), 4,4'-methylenebis (2,6-di-t-butylphenol) (manufactured by Shell Japan, Inc .: Ionox 220AH) 4,4′-bis (2,6-di-t-butylphenol), 2,2- (di-p-hydroxyphenyl) propane (manufactured by Shell Japan, Inc .: bisphenol A), 2,2-bis (3 , 5-di-tert-butyl-4-hydroxyphenyl) propane, 4,4'-cyclohexylidenebis (2,6-tert-butylphenol), hexamethylene Colebis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] (manufactured by Ciba Specialty Chemicals: Irganox L109), triethylene glycol bis [3- (3-t-butyl-4 -Hydroxy-5-methylphenyl) propionate] (manufactured by Yoshitomi Pharmaceutical: Tominox 917), 2,2'-thio- [diethyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate ] (Ciba Specialty Chemicals: Irganox L115), 3,9-bis {1,1-dimethyl-2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] Ethyl} 2,4,8,10-tetraoxaspiro [5,5] undecane (Sumitomo Chemical: Sumilizer GA80 ), 4,4′-thiobis (3-methyl-6-tert-butylphenol) (manufactured by Kawaguchi Chemical Co., Ltd .: Antage RC), 2,2′-thiobis (4,6-di-tert-butyl-resorcin), etc. Bisphenols; tetrakis [methylene-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] methane (manufactured by Ciba Specialty Chemicals: Irganox L101), 1,1,3-tris (2 -Methyl-4-hydroxy-5-t-butylphenyl) butane (Yoshitomi Pharmaceutical Co., Ltd .: Yoshinox 930), 1,3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl) -4-hydroxybenzyl) benzene (manufactured by Shell Japan, Inc .: Ionox 330), bis- [3,3'-bis- (4'-hydroxy-3'-t-butylphenol) ) Butyric acid] glycol ester, 2- (3 ', 5'-di-tert-butyl-4-hydroxyphenyl) methyl-4- (2 ", 4" -di-tert-butyl-3 "-hydroxy Poly) phenols such as phenyl) methyl-6-tert-butylphenol, 2,6-bis (2'-hydroxy-3'-tert-butyl-5'-methyl-benzyl) -4-methylphenol; pt-butylphenol And phenolaldehyde condensates such as condensates of formaldehyde and pt-butylphenol and acetaldehyde.
[0020]
Examples of phosphorus antioxidants include triaryl phosphites such as triphenyl phosphite and tricresyl phosphite, trialkyl phosphites such as trioctadecyl phosphite and tridecyl phosphite, and tridodecyl trithiophosphite. It is done.
[0021]
These antioxidants can be used alone or in combination within a range of 0.01 to 2.0 parts by weight with respect to 100 parts by weight of the base oil.
[0022]
Metal deactivators that can be used in combination with the compositions of the present invention include 4-alkyl-benzotriazoles such as benzotriazole, 4-methyl-benzotriazole, 4-ethyl-benzotriazole; 5-methyl-benzotriazole, 5- 5-alkyl-benzotriazoles such as ethyl-benzotriazole, 1-alkyl-benzotriazoles such as 1-dioctylaminomethyl-2,3-benzotriazole; 1 such as 1-dioctylaminomethyl-2,3-toltriazole -Benzotriazole derivatives such as alkyl-tolutriazoles; 2- (alkyldithio) such as benzimidazole, 2- (octyldithio) -benzimidazole, 2- (decyldithio) -benzimidazole, 2- (dodecyldithio) -benzimidazole ) Benzimidazoles; benzimidazole derivatives such as 2- (alkyldithio) -toluimidazoles such as 2- (octyldithio) -toluimidazole, 2- (decyldithio) -toluimidazole, 2- (dodecyldithio) -toluimidazole; Indazole derivatives such as tolindazoles such as indazole, 4-alkyl-indazole, 5-alkyl-indazole; benzothiazole, 2-mercaptobenzothiazole derivative (manufactured by Chiyoda Chemical Co., Ltd .: Thiolite B-3100), 2- (hexyldithio) 2- (alkyldithio) benzothiazoles such as benzothiazole and 2- (octyldithio) benzothiazole; 2- (alkyldithio) such as 2- (hexyldithio) tolthiazole and 2- (octyldithio) tolthiazole Ruthiazoles; 2- (N, N-diethyldithiocarbamyl) benzothiazole, 2- (N, N-dibutyldithiocarbamyl) -benzothiazole, 2- (N, N-dihexyldithiocarbamyl) -benzothiazole, etc. 2- (N, N-dialkyldithiocarbamyl) benzothiazoles; 2- (N, N-diethyldithiocarbamyl) tolthiazole, 2- (N, N-dibutyldithiocarbamyl) tolthiazole, 2- (N , N-dihexyldithiocarbamyl) tolthiazole and other 2- (N, N-dialkyldithiocarbamyl) -tolzothiazoles and other benzothiazole derivatives; 2- (octyldithio) benzoxazole, 2- (decyldithio) benzo 2- (alkyl) such as oxazole, 2- (dodecyldithio) benzoxazole Dithio) -benzoxazoles; benzoxazole derivatives such as 2- (alkyldithio) toluxazoles such as 2- (octyldithio) toluxazole, 2- (decyldithio) toluazole and 2- (dodecyldithio) toluoxazole; 2 , 5-bis (heptyldithio) -1,3,4-thiadiazole, 2,5-bis (nonyldithio) -1,3,4-thiadiazole, 2,5-bis (dodecyldithio) -1,3,4-thiadiazole 2,5-bis (alkyldithio) -1,3,4-thiadiazoles such as 2,5-bis (octadecyldithio) -1,3,4-thiadiazole; 2,5-bis (N, N-diethyl) Dithiocarbamyl) -1,3,4-thiadiazole, 2,5-bis (N, N-dibutyldithiocarbamyl) -1,3 2,5-bis (N, N-dialkyldithiocarbamyl) -1,3,4, such as 4-thiadiazole, 2,5-bis (N, N-dioctyldithiocarbamyl) -1,3,4-thiadiazole -Thiadiazoles; 2-N, N-dibutyldithiocarbamyl-5-mercapto-1,3,4-thiadiazole, 2-N, N-dioctyldithiocarbamyl-5-mercapto-1,3,4-thiadiazole, etc. 2-N, N-dialkyldithiocarbamyl-5-mercapto-1,3,4-thiadiazoles and the like thiadiazole derivatives; 1-alkyl-2 such as 1-di-octylaminomethyl-2,4-triazole, And triazole derivatives such as 4-triazoles.
[0023]
These metal deactivators can be used alone or in combination within the range of 0.01 to 0.5 parts by weight with respect to 100 parts by weight of the base oil.
[0024]
Examples of the antifoaming agent include organosilicates such as dimethylpolysiloxane, diethyl silicate, and fluorosilicone, and non-silicone antifoaming agents such as polyalkyl acrylate. The addition amount can be used alone or in combination within a range of 0.0001 to 0.1 parts by weight with respect to 100 parts by weight of the base oil.
[0025]
Examples of the viscosity index improver include non-dispersed viscosity index improvers such as polymethacrylates, ethylene-propylene copolymers, olefin copolymers such as styrene-diene copolymers, and the like, and a nitrogen-containing monomer is copolymerized therewith. And dispersion type viscosity index improvers. The addition amount can be used alone or in combination within a range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the base oil.
[0026]
Examples of the pour point depressant include polymethacrylate polymers. The addition amount can be used in the range of 0.01 to 5 parts by weight with respect to 100 parts by weight of the base oil.
[0027]
Examples of the detergent dispersant include metal detergents such as neutral or basic alkaline earth metal sulfonate, alkaline earth metal phenate, alkaline earth metal salicylate, alkenyl succinimide, alkenyl succinate or boron thereof. Examples include ashless dispersants such as compounds and modified products of sulfur compounds. The addition amount can be used alone or in combination within a range of 0.01 to 1 part by weight with respect to 100 parts by weight of the base oil.
[0028]
As extreme pressure agents, sulfur-based extreme pressure agents such as dialkyl sulfide, dibenzyl sulfide, dialkyl polysulfide, dibenzyl disulfide, alkyl mercaptan, dibenzothiophene, 2,2'-dithiobis (benzothiazole); trialkyl phosphate; Phosphorus extreme pressure agents such as triaryl phosphate, trialkyl phosphonate, trialkyl phosphite, triaryl phosphite, dialkyl hydrogen phosphite; zinc dialkyldithiophosphate, dialkyldithiophosphate, trialkyldithiophosphate Phosphorus / sulfur extreme pressure agents such as esters, acidic thiophosphates, and trialkyltrithiophosphites can be used. These extreme pressure agents can be used alone or in combination within the range of 0.1 to 2 parts by weight with respect to 100 parts by weight of the base oil.
[0029]
Examples of the demulsifier include known ones that are usually used as a lubricating oil additive. The addition amount can be used in the range of 0.0005 to 0.5 parts by weight with respect to 100 parts by weight of the base oil.
[0030]
【Example】
Hereinafter, the present invention will be specifically described, but the present invention is not limited to these examples. The base oil shown in Table 1 is a hydrorefined base oil having a kinematic viscosity at 40 ° C. of 31 mm 2 / s, a viscosity index of 107, a sulfur content of 5 ppm or less, a nitrogen content of 1 ppm or less, and an aniline point of 112 ° C. the pressure agents and anti-rust agent and amine are blended with various concentrations of adjusting the sample oil, we investigated the effects of the present invention from both the rust preventive performance and extreme pressure performance. Various performance test methods in Examples and Comparative Examples are as shown below.
[0031]
In order to evaluate the rust prevention performance of the rust prevention test sample oil, a rust prevention test is conducted for 24 hours at 60 ° C. in the presence of artificial seawater in accordance with ASTM D665, and rust is generated on the steel specimen after the test. I investigated whether or not.
[0032]
In order to evaluate the lubrication performance of the FZG gear test sample oil on the gear unit, the test gear A was used in accordance with ISO / WD14635-1 for each load stage at the initial oil temperature of 90 ° C. and the motor rotation speed of 1450 rpm. Then, the load stage until seizure occurred on the tooth surface of the test gear was measured while increasing the load stage.
[0033]
Example 1-8, Example 1-3, Comparative Example 1-7
These compositions and test results are shown in Tables 1-3.
[0034]
[Table 1]
Figure 0004608129
[0035]
[Table 2]
Figure 0004608129
[0036]
[Table 3]
Figure 0004608129
note)
(1) Lubrizol 859 manufactured by Lubrizol
(2) Sarcosyl O, manufactured by Ciba Specialty Chemicals
(3) Ciba Specialty Chemicals Irugacore NPA
(4) Collacore 93 manufactured by Colonial Chemical Co.
CAS No. 68906-34-3, 27136-73-8
(5) K-CORR 100 manufactured by King Industries
Rust inhibitor of U S P5275749 (Jan.4.1994) described [0037]
Comparative Example 1 shows a good extreme pressure performance in the gear test with only the extreme pressure agent, but rust is generated in the rust prevention test because no rust inhibitor and amine are added. However, in Comparative Example 3-7, since the corrosion inhibitor is added the minimum required amount, although there was no occurrence of rust in rust test, significant loss of load carrying capacity in FZG gear test by the addition of corrosion inhibitors It turns out that occurs. Also, Comparative Example 2 is not sufficient rust preventive effect can be obtained because there is no mixing of the corrosion inhibitor is added extreme pressure agent and amine.
In Example 1-8, extreme by pressure agents and corrosion inhibitor and synergy amine, greatly reduces the required amount of corrosion inhibitor, significantly improves the reduction of extreme pressure performance caused by rust.
[0038]
【The invention's effect】
(1) The lubricating oil composition of the present invention contains little or no harmful metals in terms of environment and safety, and has been used to increase the speed, pressure, compactness, and durability of industrial machinery in recent years. Correspondingly, it is possible to provide a lubricating oil composition that maintains good antirust performance and still has extreme pressure performance. Moreover, since the addition amount of a rust preventive agent can be reduced by this invention, the lubricating oil composition which has the outstanding performance can be provided cheaply.
(2) The lubricating oil composition of the present invention is useful as a lubricating oil composition required for antirust performance and extreme pressure performance used as hydraulic oil, gear oil, compressor oil, turbine oil, and bearing oil.

Claims (2)

(I)潤滑油基油100重量部に、
(II)アルキルまたはアルケニルこはく酸およびその部分エステル類、炭素数8〜24のサルコシンおよびその誘導体、アルキル化フェノキシ酢酸、N−アシル−N−アルコキシアルキルアスパラギン酸エステル類から選ばれる防錆剤0.001〜0.5重量部、
(III)下式一般式(1)で示されるアルキルアミン類および下記一般式(2)で示されるN−アルキルポリアルキレンジアミン類よりなる群から選ばれた少なくとも1種のアミン類0.001〜0.2重量部、
Figure 0004608129
(式中、Rは炭素数12〜30の直鎖の飽和または不飽和のアルキル基であり、nは1または2の整数である。)
Figure 0004608129
(式中、Rは炭素数12〜30の直鎖の飽和または不飽和のアルキル基であり、mは2〜5の整数である。)
(IV)極圧剤として、下記一般式(3)で示されるβ−ジチオフォスホリルプロピオン酸0.001〜0.5重量部、
Figure 0004608129
(式中、R は炭素数3〜8の分岐アルキル基、R は水素原子および炭素数1〜4の直鎖または分岐アルキル基よりなる群から選ばれた基である。)
を含有させたことを特徴とする潤滑油組成物。
(I) To 100 parts by weight of lubricating base oil,
(II) Rust preventive agent selected from alkyl or alkenyl succinic acid and partial esters thereof, sarcosine having 8 to 24 carbon atoms and derivatives thereof, alkylated phenoxyacetic acid, and N-acyl-N-alkoxyalkylaspartic acid esters . 001 to 0.5 parts by weight,
(III) At least one amine selected from the group consisting of alkylamines represented by the following general formula (1) and N-alkylpolyalkylenediamines represented by the following general formula (2) 0.001 to 0.001 0.2 parts by weight,
Figure 0004608129
(In the formula, R 1 is a linear saturated or unsaturated alkyl group having 12 to 30 carbon atoms, and n is an integer of 1 or 2.)
Figure 0004608129
(In the formula, R 2 is a linear saturated or unsaturated alkyl group having 12 to 30 carbon atoms, and m is an integer of 2 to 5.)
(IV) As an extreme pressure agent, 0.001 to 0.5 parts by weight of β-dithiophosphorylpropionic acid represented by the following general formula (3),
Figure 0004608129
(In the formula, R 3 is a branched alkyl group having 3 to 8 carbon atoms, and R 4 is a group selected from the group consisting of a hydrogen atom and a linear or branched alkyl group having 1 to 4 carbon atoms.)
A lubricating oil composition comprising:
前記潤滑油基油が、動粘度2〜680mm/s(40℃)、全硫黄分0〜1重量%、全窒素分0〜100ppm、アニリン点80〜130℃を示す石油系および/または合成炭化水素系である請求項1記載の潤滑油組成物。Petroleum and / or synthetic materials in which the lubricating base oil exhibits a kinematic viscosity of 2 to 680 mm 2 / s (40 ° C.), a total sulfur content of 0 to 1 wt%, a total nitrogen content of 0 to 100 ppm, and an aniline point of 80 to 130 ° C. the lubricating oil composition of claim 1 Symbol mounting a hydrocarbon.
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CA002447044A CA2447044A1 (en) 2001-05-11 2002-05-07 Lubricating oil composition comprising an additive combination of a carboxylic acid and an amine as ant-rust agent
EP02745288A EP1385926B1 (en) 2001-05-11 2002-05-07 Lubricating oil composition comprising an additive combination of a carboxylic acid and an amine as ant-rust agent
PCT/EP2002/005066 WO2002092735A1 (en) 2001-05-11 2002-05-07 Lubricating oil composition comprising an additive combination of a carboxylic acid and an amine as ant-rust agent
ES02745288T ES2259375T3 (en) 2001-05-11 2002-05-07 COMPOSITION OF LUBRICATING OIL THAT INCLUDES A COMBINATION OF ADDITIVES COMPOSED OF A CARBOXILIC ACID AND OF AN AMINA AS AN ANTI-TOOL AGENT.
DK02745288T DK1385926T3 (en) 2001-05-11 2002-05-07 Lubricating oil composition comprising an additive combination of a carboxylic acid and an amine as an anti-rust agent
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KR1020037014588A KR100866811B1 (en) 2001-05-11 2002-05-07 Lubricant composition containing carboxylic acid and amine as additive combination as rust inhibitor
DE60209497T DE60209497T2 (en) 2001-05-11 2002-05-07 LUBRICATING OIL COMPOSITION CONTAINING A MIXTURE OF CARBOXYLIC ACIDS AND AMINES AS ANTIFREEZE AGENT
AT02745288T ATE318881T1 (en) 2001-05-11 2002-05-07 LUBRICANT OIL COMPOSITION CONTAINING A MIXTURE OF CARBOXYLIC ACIDS AND AMINES AS AN ANTI-RUST AGENT

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CN1522295A (en) 2004-08-18
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US20040214733A1 (en) 2004-10-28
KR20030096370A (en) 2003-12-24

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