JP2009511728A - Lubricating oil composition - Google Patents

Lubricating oil composition Download PDF

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JP2009511728A
JP2009511728A JP2008536036A JP2008536036A JP2009511728A JP 2009511728 A JP2009511728 A JP 2009511728A JP 2008536036 A JP2008536036 A JP 2008536036A JP 2008536036 A JP2008536036 A JP 2008536036A JP 2009511728 A JP2009511728 A JP 2009511728A
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oil composition
lubricating oil
lubricating
phenyl
weight
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ニコラス・ジョン・ベル
光洋 永仮
ペーター・ウィリアム・ロベルト・スミス
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Shell Internationale Research Maatschappij BV
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M169/04—Mixtures of base-materials and additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/06—Well-defined aromatic compounds
    • C10M2203/065—Well-defined aromatic compounds used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/104—Aromatic fractions
    • C10M2203/1045—Aromatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/17—Fisher Tropsch reaction products
    • C10M2205/173—Fisher Tropsch reaction products used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/22—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts
    • C10M2205/223—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C10M2215/065—Phenyl-Naphthyl amines
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/04—Detergent property or dispersant property
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/30—Refrigerators lubricants or compressors lubricants

Abstract

【課題】良好な沈着制御性ばかりでなく、優れた熱・酸化安定性も示す潤滑油組成物を提供すること。
【解決手段】１種以上のヒドロカルビル置換芳香族潤滑基油と（ａ）１種以上のフェニル−ナフチルアミン及び（ｂ）１種以上のジフェニルアミンとの組合わせを含み、更にポリ−α−オレフィン及び／又はフィッシャー・トロプシュ誘導基油からなる１種以上の追加の潤滑基油を含む潤滑油組成物。
【選択図】なし
Provided is a lubricating oil composition that exhibits not only good deposition controllability but also excellent thermal and oxidation stability.
A combination of one or more hydrocarbyl-substituted aromatic lubricating base oils with (a) one or more phenyl-naphthylamines and (b) one or more diphenylamines, and further comprising a poly-α-olefin and / or Or a lubricating oil composition comprising one or more additional lubricating base oils comprising a Fischer-Tropsch derived base oil.
[Selection figure] None

Description

本発明は潤滑油組成物に関し、更に詳しくはロータリーエアコンプレッサーの潤滑用潤滑油組成物に関する。   The present invention relates to a lubricating oil composition, and more particularly to a lubricating oil composition for lubricating a rotary air compressor.

コンプレッサー、特にロータリーエアコンプレッサーの潤滑では、潤滑油を高温条件に暴露する可能性がある。
このようなコンプレッサーに使用される潤滑油組成物は、各成分を充分に潤滑するため、要件の組合わせに適合しなければならない。 Lubricating oils can be exposed to high temperature conditions in the lubrication of compressors, particularly rotary air compressors.
Lubricating oil compositions used in such compressors must meet a combination of requirements in order to adequately lubricate each component.

したがって、この種のコンプレッサーでは油の変化に対する必要性を最小化可能にする、即ち、油の排出間隔を好適化するには、このような潤滑油組成物は、良好な沈着制御性ばかりでなく、良好な熱・酸化安定性も示さなければならない。
ＷＯ−Ａ−０１／６４８２０には、（Ａ）少なくとも１種のポリアルキレングリコール（ＰＡＧ）と（Ｂ）少なくとも１種のアルキル芳香族化合物とのブレンドを含む潤滑基油含有潤滑油組成物が記載されている。 Therefore, in order to be able to minimize the need for oil changes in this type of compressor, i.e. to optimize the oil discharge interval, such lubricating oil compositions have not only good deposition controllability. It must also show good thermal and oxidative stability.
WO-A-01 / 64820 describes a lubricating base oil-containing lubricating oil composition comprising a blend of (A) at least one polyalkylene glycol (PAG) and (B) at least one alkyl aromatic compound. Has been.

この潤滑油組成物は、容積式コンプレッサーの潤滑油として使用できると簡単に述べている。
ＷＯ−Ａ−０１／６４８２０は、ＰＡＧをアルキルナフタレン及び各種酸化防止剤と組合わせてなる潤滑油組成物を例示している。
ＥＰ−Ａ−０３８７９７９は、酸化防止剤として特定のアルキル置換ジフェニルアミン、即ち、ｐ，ｐ’−ジノニルジフェニルアミンを開示している。 It simply states that this lubricating oil composition can be used as a lubricating oil for positive displacement compressors.
WO-A-01 / 64820 exemplifies a lubricating oil composition in which PAG is combined with alkyl naphthalene and various antioxidants.
EP-A-0387979 discloses certain alkyl-substituted diphenylamines as antioxidants, i.e. p, p'-dinonyldiphenylamine.

ＥＰ−Ａ−０３８７９７９は、更にこの酸化防止剤を、芳香族含有量が３０重量％以下の鉱油及び／又は構造単位中に芳香族環を持たない合成油を含む潤滑油組成物に使用することを開示している。
即ち、ＥＰ−Ａ−０３８７９７９は、芳香族潤滑基油に前記酸化防止剤を併用することを教示していない。 EP-A-0387979 further uses this antioxidant in a lubricating oil composition comprising a mineral oil having an aromatic content of 30% by weight or less and / or a synthetic oil having no aromatic ring in the structural unit. Is disclosed.
That is, EP-A-0387979 does not teach using the antioxidant together with an aromatic lubricating base oil.

ＥＰ−Ａ−０３８７９７９は、ｐ，ｐ’−ジノニルジフェニルアミン、Ｎ−ｐ−ドデシルフェニル−α−ナフチルアミン、及び基油として、芳香族含有量が７重量％の精製鉱油か或いはポリ−α−オレフィン油のいずれかを含む組成物を開示している。しかし、この文献には本発明の特定の潤滑油組成物についての開示はない。   EP-A-0387979 is p, p′-dinonyldiphenylamine, Np-dodecylphenyl-α-naphthylamine and, as a base oil, a refined mineral oil with an aromatic content of 7% by weight or a poly-α-olefin. Disclosed are compositions comprising any of the oils. However, this document does not disclose the specific lubricating oil composition of the present invention.

ＥＰ−Ａ−０３８７９７９の表２には、酸化防止性能（ＡＳＴＭ Ｄ２２７２による）が２１５４分の前記精製基油中にｐ，ｐ’−分岐ジノニルジフェニルアミン（実施例５）及びＮ−ｐ−分岐ドデシルフェニル−α−ナフチルアミンを含有する組成物が開示されている。   In Table 2 of EP-A-0387979, p, p'-branched dinonyldiphenylamine (Example 5) and Np-branched dodecyl in the refined base oil having an antioxidant performance (according to ASTM D2272) of 2154 minutes. Compositions containing phenyl-α-naphthylamine are disclosed.

更に、前記表の比較例４には、酸化防止性能（ＡＳＴＭ Ｄ２２７２による）が２１２７分の前記精製基油中にｐ，ｐ’−分岐ジオクチルジフェニルアミン及びＮ−ｐ−分岐オクチルフェニル−α−ナフチルアミンを含有する組成物が記載されている。   Furthermore, in Comparative Example 4 in the above table, p, p'-branched dioctyldiphenylamine and Np-branched octylphenyl-α-naphthylamine were added to the purified base oil having an antioxidant performance (according to ASTM D2272) of 2127 minutes. The containing composition is described.

ＵＳ−Ｂ１−６１８０５７５には、ベアリング、ギアの潤滑、及びその他、ウエットクラッチシステム、冷却用ギアボックス及びロータリースクリューコンプレッサーのような工業的用途に使用できる潤滑油組成物が記載されている。   US-B1-6180575 describes lubricating oil compositions that can be used for bearings, gear lubrication, and other industrial applications such as wet clutch systems, cooling gearboxes and rotary screw compressors.

前記潤滑油組成物は、炭化水素ベース流体を少なくとも５０重量％含むベース流体と、（１）置換トリアゾールと炭化水素アミンホスフェートとの付加体を全組成物に対し約５重量％未満、及び（２）トリ−ヒドロカルビルホスフェートを全組成物に対し５重量％以下からなる添加剤の組合わせ（但し、トリ−ヒドロカルビルホスフェートと付加体との比率は約２：１〜約５：１）とを含有する。   The lubricating oil composition comprises a base fluid comprising at least 50% by weight hydrocarbon base fluid, and (1) less than about 5% by weight of an adduct of a substituted triazole and hydrocarbon amine phosphate, and (2 ) Containing tri-hydrocarbyl phosphate in an additive combination comprising up to 5% by weight of the total composition, provided that the ratio of tri-hydrocarbyl phosphate to adduct is from about 2: 1 to about 5: 1 .

ＵＳ−Ｂ１−６１８０５７５は、前記潤滑油組成物にも使用可能な従来の添加剤として、粘度指数向上剤、酸化防止剤、耐摩耗添加剤及び腐食防止剤を挙げている。注目すべきは、ＵＳ−Ｂ１−６１８０５７５の説明欄には、多数の異なる酸化防止剤が示されているが、これらの酸化防止剤は実施例では重要な特徴ではなく、しかも詳細に説明されていないことである。   US-B1-6180575 lists viscosity index improvers, antioxidants, antiwear additives and corrosion inhibitors as conventional additives that can also be used in the lubricating oil composition. It should be noted that in the description section of US-B1-6180575, a number of different antioxidants are shown, but these antioxidants are not an important feature in the examples and are described in detail. It is not.

ＵＳ−Ｂ１−６１８０５７５の実施例３は、Ｃ１４アルキルナフタレン２０．００重量％、及びＰＡＯとアミン系酸化防止剤０．７５重量％との混合物７６．７８重量％を含むＩＳＯグレード３２油であると述べている。前記油のＡＳＴＭ Ｄ２２７２によるＲＢＯＴ値は１７５０分であることが示されている。
ＷＯ−Ａ−０１／６４８２０ ＥＰ−Ａ−０３８７９７９ ＵＳ−Ｂ１−６１８０５７５ ＵＳ−Ａ−５６０２０８６ ＷＯ−Ａ−０３／０４８２７５ ＷＯ−Ａ−０３／０４８２７６ ＷＯ−Ａ−９８／２６０３０ ＷＯ−Ａ−０２／０７０６３１ Example 3 of US-B1-6180575 is an ISO grade 32 oil comprising 20.00% by weight of C14 alkylnaphthalene and 76.78% by weight of a mixture of PAO and 0.75% by weight of an amine antioxidant. Says. The RBOT value according to ASTM D2272 for the oil is shown to be 1750 minutes.
WO-A-01 / 64820 EP-A-0387979 US-B1-6180575 US-A-5602086 WO-A-03 / 048275 WO-A-03 / 048276 WO-A-98 / 26030 WO-A-02 / 070631

しかし、コンプレッサー用の潤滑油組成物は当該技術分野で知られているが、油の排出間隔をなお更に拡大可能にするには、性能の向上した潤滑油組成物を未だ開発する必要がある。   However, although lubricating oil compositions for compressors are known in the art, it is still necessary to develop lubricating oil compositions with improved performance in order to be able to further increase the oil discharge interval.

本発明では、良好な沈着制御性ばかりでなく、優れた熱・酸化安定性も示す潤滑油組成物が意外にも見出された。   In the present invention, a lubricating oil composition having not only good deposition controllability but also excellent heat / oxidation stability has been unexpectedly found.

本発明の潤滑油組成物は、１種以上のヒドロカルビル置換芳香族潤滑基油と（ａ）１種以上のフェニル−ナフチルアミン及び（ｂ）１種以上のジフェニルアミンとの組合わせを含み、更にポリ−α−オレフィン及び／又はフィッシャー・トロプシュ誘導基油を含む１種以上の追加の潤滑基油を含む。   The lubricating oil composition of the present invention comprises a combination of one or more hydrocarbyl-substituted aromatic lubricating base oils with (a) one or more phenyl-naphthylamines and (b) one or more diphenylamines, and a poly- Includes one or more additional lubricating base oils including alpha-olefins and / or Fischer-Tropsch derived base oils.

本発明の潤滑油組成物は、成分（ａ）及び（ｂ）の一方の単一化合物又は両方の化合物の混合物を含有する。
本発明で使用される１種以上のフェニル−ナフチルアミンは、置換又は非置換のどちらでも可能であるし、或いは両方の混合物でも可能である。１種以上のフェニル−ナフチルアミンは、そのままでも或いは塩の形態でも使用可能である。このようなフェニル−ナフチルアミンの例は、フェニル−α−ナフチルアミン及びフェニル−β−ナフチルアミンである。フェニル−ナフチルアミンは、好ましくはフェニル−α−ナフチルアミンである。 The lubricating oil composition of the present invention contains one single compound of components (a) and (b) or a mixture of both compounds.
The one or more phenyl-naphthylamines used in the present invention can be either substituted or unsubstituted, or a mixture of both. One or more phenyl-naphthylamines can be used as such or in the form of a salt. Examples of such phenyl-naphthylamines are phenyl-α-naphthylamine and phenyl-β-naphthylamine. The phenyl-naphthylamine is preferably phenyl-α-naphthylamine.

好ましい置換フェニル−ナフチルアミンは、モノアルキル化フェニル−α−ナフチルアミンである。都合良く使用できるフェニル−ナフチルアミンの例としては、オクチルフェニル−β−ナフチルアミン、ｔ−オクチルフェニル−α−ナフチルアミン、フェニル−α−ナフチルアミン、フェニル−β−ナフチルアミン、ｐ−オクチルフェニル−α−ナフチルアミン、４−オクチルフェニル−１−オクチル−β−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、Ｎ−ヘキシルフェニル−２−ナフチルアミンが挙げられる。特に好ましいフェニル−α−ナフチルアミンは、モノオクチル化フェニル−α−ナフチルアミンである。   A preferred substituted phenyl-naphthylamine is monoalkylated phenyl-α-naphthylamine. Examples of phenyl-naphthylamine which can be conveniently used include octylphenyl-β-naphthylamine, t-octylphenyl-α-naphthylamine, phenyl-α-naphthylamine, phenyl-β-naphthylamine, p-octylphenyl-α-naphthylamine, 4 -Octylphenyl-1-octyl-β-naphthylamine, nt-dodecylphenyl-1-naphthylamine, N-hexylphenyl-2-naphthylamine. A particularly preferred phenyl-α-naphthylamine is monooctylated phenyl-α-naphthylamine.

他の好ましいフェニル−ナフチルアミンは、非置換フェニル−α−ナフチルアミンである。
本発明の潤滑油組成物に都合良く使用できる市販のフェニル−ナフチルアミンの例は、Ｃｉｂａ Ｓｐｅｃｉａｌｔｙ Ｃｈｅｍｉｃａｌｓから商品名“ＩＲＧＡＮＯＸ Ｌ−０６”で得られるものである。 Another preferred phenyl-naphthylamine is unsubstituted phenyl-α-naphthylamine.
Examples of commercially available phenyl-naphthylamines that can be conveniently used in the lubricating oil composition of the present invention are those obtained from Ciba Specialty Chemicals under the trade designation “IRGANOX L-06”.

本発明の潤滑油組成物は、更に１種以上のジフェニルアミン（ｂ）を含む。１種以上のジフェニルアミンは置換しても非置換でも可能である。好ましくはヒドロカルビル置換ジフェニルアミン、更に好ましくはアルキル置換ジフェニルアミンが使用される。好ましいジフェニルアミンは、４，４’−ジアルキルジフェニルアミンである。このアルキル基の炭素原子数は、好ましくは２〜１５、更に好ましくは３〜１２の範囲である。好ましいジフェニルアミンとしては、ｐ，ｐ’−ジオクチル−ジフェニルアミン、ｐ，ｐ’−ジ−α−メチルベンジル−ジフェニルアミン及びＮ−ｐ−ブチルフェニル−Ｎ−ｐ’−オクチルフェニルアミンのようなジアルキルジフェニルアミン；モノ−ｔ−ブチルジフェニルアミン及びモノ−オクチルジフェニルアミンのようなモノアルキルジフェニルアミン；ジ−（２，４−ジエチルフェニル）アミン及びジ（２−エチル−４−ノニルフェニル）アミンのようなビス（ジアルキルフェニル）アミンが挙げられる。   The lubricating oil composition of the present invention further contains one or more diphenylamines (b). The one or more diphenylamines can be substituted or unsubstituted. Preferably hydrocarbyl-substituted diphenylamines are used, more preferably alkyl-substituted diphenylamines. A preferred diphenylamine is 4,4'-dialkyldiphenylamine. The number of carbon atoms of the alkyl group is preferably in the range of 2-15, more preferably 3-12. Preferred diphenylamines include dialkyldiphenylamines such as p, p′-dioctyl-diphenylamine, p, p′-di-α-methylbenzyl-diphenylamine and Np-butylphenyl-Np′-octylphenylamine; mono Monoalkyldiphenylamines such as t-butyldiphenylamine and mono-octyldiphenylamine; bis (dialkylphenyl) amines such as di- (2,4-diethylphenyl) amine and di (2-ethyl-4-nonylphenyl) amine Is mentioned.

本発明の潤滑油組成物に都合良く使用できる市販のジフェニルアミンの例は、Ｃｉｂａ Ｓｐｅｃｉａｌｔｙ Ｃｈｅｍｉｃａｌｓから商品名“ＩＲＧＡＮＯＸ Ｌ−５７”で得られるものである。   Examples of commercially available diphenylamines that can be conveniently used in the lubricating oil composition of the present invention are those obtained from Ciba Specialty Chemicals under the trade designation “IRGANOX L-57”.

本発明の潤滑油組成物中に存在する１種以上のヒドロカルビル置換芳香族潤滑基油は、好ましくはアルキル化芳香族潤滑基油、更に好ましくはアルキル化ナフタレン、アルキル化ベンゼン、アルキル化ジフェニル化合物及びアルキル化ジフェニルメタン、の１種以上から選ばれるアルキル化芳香族潤滑基油である。この種の基油は、ＵＳ−Ｂ１−６１８０５７５に記載され、またこの文献に記載される方法で都合良く製造できる。異なる好適な基油は、異なる潤滑粘度を持つことができる。１種以上のヒドロカルビル置換芳香族潤滑基油は、水素及び炭素のみを含む化合物で本質的に構成される。硫黄含有化合物のような汚染物は限定量存在してよい。１種以上のヒドロカルビル置換芳香族潤滑基油の好ましくは８０重量％を超える分、更に好ましくは９０重量％を超える分は、水素及び炭素のみからなる化合物で構成される。   The one or more hydrocarbyl-substituted aromatic lubricating base oils present in the lubricating oil composition of the present invention are preferably alkylated aromatic lubricating base oils, more preferably alkylated naphthalenes, alkylated benzenes, alkylated diphenyl compounds and An alkylated aromatic lubricating base oil selected from one or more of alkylated diphenylmethane. Such base oils are described in US-B 1-6180575 and can be conveniently prepared by the methods described in this document. Different suitable base oils can have different lubricating viscosities. One or more hydrocarbyl-substituted aromatic lubricating base oils are essentially composed of compounds containing only hydrogen and carbon. Contaminants such as sulfur-containing compounds may be present in limited amounts. The amount of the one or more hydrocarbyl-substituted aromatic lubricating base oils preferably exceeds 80% by weight, and more preferably exceeds 90% by weight, is composed of a compound consisting only of hydrogen and carbon.

本発明の潤滑油組成物に使用される好ましいヒドロカルビル置換芳香族潤滑基油はアルキル化ナフタレンである。このアルキル化ナフタレンは、ＵＳ−Ａ−５６０２０８６、ＷＯ−Ａ−０３／０４８２７５及びＷＯ−Ａ−０３／０４８２７６に記載されるようなモノ−、ジ−、トリ−又はテトラ−アルキル置換ナフタレンであってよい。
本発明の潤滑油組成物は、ポリ−α−オレフィン及び／又はフィッシャー・トロプシュ誘導基油からなる１種以上の追加の潤滑基油を含有する。 A preferred hydrocarbyl substituted aromatic lubricating base oil for use in the lubricating oil composition of the present invention is an alkylated naphthalene. The alkylated naphthalene is a mono-, di-, tri- or tetra-alkyl substituted naphthalene as described in US-A-5602806, WO-A-03 / 048275 and WO-A-03 / 048276, Good.
The lubricating oil composition of the present invention contains one or more additional lubricating base oils consisting of poly-α-olefins and / or Fischer-Tropsch derived base oils.

ＵＳ−Ｂ１−６１８０５７５及びＵＳ−Ａ−５６０２０８６に記載されるように、ポリ−α−オレフィン及び／又はフィッシャー・トロプシュ誘導基油、並びにそれらの製造法は当該技術分野で周知である。本発明の潤滑油組成物に使用できる好ましいポリ−α−オレフィンは、Ｃ２〜Ｃ３２のα−オレフィンから誘導できる。ポリ−α−オレフィン用の特に好ましい供給原料は、１−オクテン、１−デセン、１−ドデセン及び１−テトラデセンである。本発明の潤滑油組成物に都合良く使用できるポリ−α−オレフィンは、１００℃での動粘度が好ましくは３〜３００ｍｍ２／ｓ、更に好ましくは４〜１００ｍｍ２／ｓのものである。 Poly-alpha-olefins and / or Fischer-Tropsch derived base oils and their methods of preparation are well known in the art, as described in US-B1-6180575 and US-A-5602806. Preferred poly-α-olefins that can be used in the lubricating oil composition of the present invention can be derived from C 2 to C 32 α-olefins. Particularly preferred feedstocks for poly-α-olefins are 1-octene, 1-decene, 1-dodecene and 1-tetradecene. The poly-α-olefin that can be conveniently used in the lubricating oil composition of the present invention has a kinematic viscosity at 100 ° C. of preferably 3 to 300 mm 2 / s, more preferably 4 to 100 mm 2 / s.

本発明の潤滑油組成物に１種以上の追加の潤滑基油として都合良く使用できるフィッシャー・トロプシュ誘導基油は、例えばＥＰ−Ａ−７７６９５９、ＥＰ−Ａ−６６８３４２、ＷＯ−Ａ−９７／２１７８８、ＷＯ−Ａ−００／１５７３６、ＷＯ−Ａ−００／１４１８８、ＷＯ−Ａ−００／１４１８７、ＷＯ−Ａ−００／１４１８３、ＷＯ−Ａ−００／１４１７９、ＷＯ−Ａ−００／０８１１５、ＷＯ−Ａ−９９／４１３３２、ＷＯ−Ａ−１０２９０２９、ＷＯ−Ａ−０１／１８１５６及びＷＯ−Ａ−０１／５７１６６に記載されるようなフィッシャー・トロプシュ誘導基油である。   Fischer-Tropsch derived base oils that can be conveniently used in the lubricating oil composition of the present invention as one or more additional lubricating base oils are, for example, EP-A-776959, EP-A-668342, WO-A-97 / 21788. , WO-A-00 / 15736, WO-A-00 / 14188, WO-A-00 / 14187, WO-A-00 / 14183, WO-A-00 / 14179, WO-A-00 / 08115, WO A Fischer-Tropsch derived base oil as described in A-99 / 41332, WO-A-1029029, WO-A-01 / 18156 and WO-A-01 / 57166.

本発明の一実施態様では前記１種以上の追加の潤滑基油は、更に鉱物潤滑基油及び／又は他の合成潤滑基油を含有してよい。
このような鉱物潤滑基油としては、更に水素化分解及び水素化仕上げの工程及び／又は脱蝋により更に精製できるパラフィン系、ナフテン系又はパラフィン／ナフテン混合系の、液体石油及び溶剤処理又は酸処理した鉱物潤滑油が挙げられる。 In one embodiment of the invention, the one or more additional lubricating base oils may further comprise a mineral lubricating base oil and / or other synthetic lubricating base oil.
Such mineral lubricating base oils include liquid petroleum and solvent treatment or acid treatment of paraffinic, naphthenic or paraffin / naphthene mixed systems that can be further refined by hydrocracking and hydrofinishing processes and / or dewaxing. Mineral lubricants.

ナフテン系基油は、粘度指数（ＶＩ）が低く（一般に４０〜８０）、また流動点も低い。このような基油は、ナフテンが豊富で蝋含有量が少ない供給原料から製造され、主として色調及び色安定性が重要で、粘度指数及び酸化安定性が次に重要である潤滑油に使用される。   Naphthenic base oils have a low viscosity index (VI) (generally 40-80) and a low pour point. Such base oils are manufactured from feedstocks rich in naphthenes and low wax content, and are used in lubricating oils where color tone and color stability are important, viscosity index and oxidative stability are the next most important .

パラフィン系基油は、粘度指数が高く（一般に＞９５）、また流動点も高い。この種の基油は、パラフィンが豊富な供給原料から製造され、粘度指数及び酸化安定性が重要な潤滑油に使用される。
合成法によって、簡単な物質から分子を作ったり、或いは所要の正確な特性を有するように改質した構造を分子に付与することは可能である。 Paraffinic base oils have a high viscosity index (generally> 95) and a high pour point. This type of base oil is produced from a paraffin-rich feedstock and is used in lubricating oils where viscosity index and oxidative stability are important.
It is possible to make a molecule from a simple substance by a synthetic method, or to give a molecule a structure modified so as to have a required accurate property.

本発明の１種以上の追加の潤滑基油に存在してよい他の合成潤滑基油としては、ポリアルキレングリコール（ＰＡＧ）、ポリイソブチレン（ＰＩＢ）二塩基酸エステル、ポリオールエステル及びその他の複合エステル、及び脱蝋済み蝋状ラフィネートのような炭化水素油が挙げられる。シェルグループから“ＸＨＶＩ”（商標）名で販売されている合成炭化水素基油が都合良く使用できる。   Other synthetic lubricating base oils that may be present in one or more additional lubricating base oils of the present invention include polyalkylene glycol (PAG), polyisobutylene (PIB) dibasic acid ester, polyol ester and other complex esters. And hydrocarbon oils such as dewaxed waxy raffinate. Synthetic hydrocarbon base oils sold by the Shell Group under the name “XHVI” ™ can be conveniently used.

任意の追加の潤滑基油は、飽和物の含有量が、ＡＳＴＭ Ｄ２００７で測定して、好ましくは８０重量％を超え、更に好ましくは９０重量％を超える、鉱油及び／又は他の合成基油で構成される。   Optional additional lubricating base oils are mineral oils and / or other synthetic base oils, preferably having a saturate content, as measured by ASTM D2007, of greater than 80 wt%, more preferably greater than 90 wt%. Composed.

更に前記任意の追加の潤滑基油は、硫黄を、ＡＳＴＭ Ｄ２６２２、ＡＳＴＭ Ｄ４２９４、ＡＳＴＭ Ｄ４９２７又はＡＳＴＭ Ｄ３１２０で測定し、元素状硫黄として計算して、好ましくは１．０重量％未満、更に好ましくは０．１重量％未満含有する。   Furthermore, the optional additional lubricating base oil preferably has sulfur as measured by ASTM D2622, ASTM D4294, ASTM D4927 or ASTM D3120 and calculated as elemental sulfur, preferably less than 1.0% by weight, more preferably 0. .Contains less than 1% by weight.

前記任意の追加の潤滑基油の粘度指数は、ＡＳＴＭ Ｄ２２７０で測定して、好ましくは８０を超え、更に好ましくは１２０を超える。   The viscosity index of the optional additional lubricating base oil is preferably greater than 80, more preferably greater than 120, as measured by ASTM D2270.

本発明の潤滑油組成物は、４０℃での動粘度が好ましくは３２〜１５０ｍｍ２／ｓ、更に好ましくは３２〜１００ｍｍ２／ｓ、最も好ましくは３２〜７８ｍｍ２／ｓの範囲である。 The lubricating oil composition of the present invention preferably has a kinematic viscosity at 40 ℃ 32~150mm 2 / s, more preferably 32~100mm 2 / s, most preferably from 32~78mm 2 / s.

本発明の潤滑油組成物に存在する添加剤（ａ）及び（ｂ）の量は、組成物に使用した特定の化合物に依存する。
本発明の潤滑油組成物は、１種以上のフェニル−ナフチルアミンを、潤滑油組成物の合計重量に対し、全量で好ましくは０．１〜５．０重量％、更に好ましくは０．２〜２．０重量％の範囲で含有する。 The amount of additives (a) and (b) present in the lubricating oil composition of the present invention depends on the particular compound used in the composition.
In the lubricating oil composition of the present invention, the total amount of one or more phenyl-naphthylamines is preferably 0.1 to 5.0% by weight, more preferably 0.2 to 2%, based on the total weight of the lubricating oil composition. It is contained in the range of 0.0% by weight.

本発明の潤滑油組成物は、１種以上のジフェニルアミンを、潤滑油組成物の合計重量に対し、全量で好ましくは０．１〜５．０重量％、更に好ましくは０．２〜２．０重量％の範囲で含有する。   In the lubricating oil composition of the present invention, the total amount of one or more diphenylamines is preferably 0.1 to 5.0% by weight, more preferably 0.2 to 2.0%, based on the total weight of the lubricating oil composition. It is contained in the range of% by weight.

本発明の潤滑油組成物にはヒドロカルビル置換芳香族潤滑基油が、潤滑油組成物の合計重量に対し、全量で好ましくは０．１〜３０重量％、更に好ましくは１〜２０重量％の範囲で存在する。   In the lubricating oil composition of the present invention, the hydrocarbyl-substituted aromatic lubricating base oil is preferably 0.1 to 30% by weight, more preferably 1 to 20% by weight, based on the total weight of the lubricating oil composition. Exists.

本発明の潤滑油組成物には１種以上のヒドロカルビル置換芳香族潤滑基油が、潤滑基油の合計重量に対し、好ましくは６０重量％未満、更に好ましくは２５重量％未満、最も好ましくは１〜２５重量％の範囲で含まれる。ここで、潤滑基油の合計重量とは、１種以上のヒドロカルビル置換芳香族潤滑基油と１種以上の追加の潤滑基油との合計重量のことである。   In the lubricating oil composition of the present invention, one or more hydrocarbyl-substituted aromatic lubricating base oils are preferably less than 60% by weight, more preferably less than 25% by weight, and most preferably 1%, based on the total weight of the lubricating base oil. It is contained in the range of ˜25% by weight. Here, the total weight of the lubricating base oil is the total weight of one or more hydrocarbyl-substituted aromatic lubricating base oils and one or more additional lubricating base oils.

本発明の好ましい実施態様では１種以上のフェニル−ナフチルアミン（ａ）と１種以上のジフェニルアミン（ｂ）とは、本発明の潤滑油組成物中に、好ましくは１：３〜３：１、更に好ましくは１：２〜１：１の範囲の重量比で存在する。   In a preferred embodiment of the invention, the one or more phenyl-naphthylamines (a) and the one or more diphenylamines (b) are preferably in the lubricating oil composition of the invention, preferably 1: 3 to 3: 1, Preferably it is present in a weight ratio ranging from 1: 2 to 1: 1.

本発明の潤滑油組成物は、フェノール系酸化防止剤を殆ど含有しないことが好ましい。フェノール系酸化防止剤の存在量は、潤滑油組成物の全量に対し、好ましくは１重量％未満、更に好ましくは０．５重量％未満、なお更に好ましくは０．１重量％未満、最も好ましくは０重量％である。   The lubricating oil composition of the present invention preferably contains almost no phenolic antioxidant. The amount of phenolic antioxidant present is preferably less than 1% by weight, more preferably less than 0.5% by weight, still more preferably less than 0.1% by weight, and most preferably based on the total amount of the lubricating oil composition. 0% by weight.

本発明の潤滑油組成物は、更に極圧添加剤、耐摩耗添加剤、金属不活性化剤、腐食防止剤、消泡剤及び／又は解乳化剤のような添加剤を含有できる。   The lubricating oil composition of the present invention can further contain additives such as extreme pressure additives, antiwear additives, metal deactivators, corrosion inhibitors, antifoaming agents and / or demulsifiers.

都合良く使用できる耐摩耗添加剤としては、ジアルキル−、ジアリール−及び／又はアルキルアリール−ジチオ燐酸亜鉛から選ばれたジチオ燐酸亜鉛化合物、モリブデン含有化合物、ホウ素含有化合物、及び置換又は非置換のチオ燐酸及びその塩のような灰分のない耐摩耗添加剤が挙げられる。これらの耐摩耗添加剤は、本発明の潤滑油組成物に、潤滑油組成物の合計重量に対し、各々、０．１〜３．０重量％の範囲の量で都合良く添加できる。   Antiwear additives that can be conveniently used include zinc dithiophosphate compounds selected from dialkyl-, diaryl- and / or alkylaryl-zinc dithiophosphates, molybdenum-containing compounds, boron-containing compounds, and substituted or unsubstituted thiophosphoric acids. And anti-wear additives free of ash such as salts thereof. These antiwear additives can be conveniently added to the lubricating oil composition of the present invention in amounts ranging from 0.1 to 3.0% by weight, respectively, relative to the total weight of the lubricating oil composition.

モリブデン含有化合物の例としては、ジチオカルバミン酸モリブデン、例えばＷＯ−Ａ−９８／２６０３０に記載されるような３核モリブデン化合物、モリブデンのスルフィド、及びジチオ燐酸モリブデンが都合良く挙げられる。
都合良く使用できるホウ素含有化合物としては、ホウ酸（ｂｏｒａｔｅ）エステル、ホウ酸化脂肪族アミン、ホウ酸化エポキシド、ホウ酸アルカリ金属（又は混合アルカリ金属又はアルカリ土類金属）及びホウ酸化過剰塩基（ｏｖｅｅｒｂａｓｅｄ）金属塩が挙げられる。 Examples of molybdenum containing compounds conveniently include molybdenum dithiocarbamates such as trinuclear molybdenum compounds as described in WO-A-98 / 26030, molybdenum sulfides, and molybdenum dithiophosphates.
Boron-containing compounds that can be conveniently used include borate esters, borated aliphatic amines, borated epoxides, alkali metal borates (or mixed alkali or alkaline earth metals), and borated excess bases. Metal salts are mentioned.

アルケニル琥珀酸又はそのエステル部分のような化合物、ベンゾトリアゾール系化合物及びチオジアゾール系化合物は、本発明の潤滑油組成物に腐食防止剤として都合良く使用できる。
ポリシロキサン、ジメチルポリシクロヘキサン及びポリアクリレートのような化合物は、本発明の潤滑油組成物に消泡剤として都合良く使用できる。
本発明は更に、本発明の潤滑油組成物をロータリーエアコンプレッサーの潤滑に使用する方法を提供する。 Compounds such as alkenyl succinic acid or its ester moiety, benzotriazole compounds and thiodiazole compounds can be conveniently used as corrosion inhibitors in the lubricating oil compositions of the present invention.
Compounds such as polysiloxanes, dimethylpolycyclohexane and polyacrylates can be conveniently used as antifoaming agents in the lubricating oil compositions of the present invention.
The present invention further provides a method of using the lubricating oil composition of the present invention for rotary air compressor lubrication.

本発明の潤滑油組成物は、１種以上のフェニル−ナフチルアミン、１種以上のジフェニルアミン、１種以上のヒドロカルビル置換芳香族潤滑基油、並びにポリ−α−オレフィン及び／又はフィッシャー・トロプシュ誘導基油及び任意に前述のような添加剤を含む１種以上の追加の潤滑基油を一緒にブレンドすれば、都合良く製造できる。
本発明を以下に実施例を参照して説明するが、これらの実施例はいかなる方法でも本発明を限定することを意図しない。 The lubricating oil composition of the present invention comprises one or more phenyl-naphthylamines, one or more diphenylamines, one or more hydrocarbyl substituted aromatic lubricating base oils, and poly-α-olefins and / or Fischer-Tropsch derived base oils. And optionally one or more additional lubricating base oils containing additives as described above can be conveniently produced.
The invention will now be described with reference to the following examples, which are not intended to limit the invention in any way.

表１及び表２で特定した基油及び添加剤を用いて配合物をブレンドした。
表１、２の配合物に使用したフェニル−ナフチルアミン（ａ）は、Ｃｉｂａ Ｓｐｅｃｉａｌｔｙ Ｃｈｅｍｉｃａｌｓから商品名“ＩＲＧＡＮＯＸ Ｌ−０６”で得られたものである。
表１、２の配合物に使用したジフェニルアミン（ｂ）は、Ｃｉｂａ Ｓｐｅｃｉａｌｔｙ Ｃｈｅｍｉｃａｌｓから商品名“ＩＲＧＡＮＯＸ Ｌ−５７”で得られたものである。 The formulations were blended using the base oils and additives identified in Tables 1 and 2.
The phenyl-naphthylamine (a) used in the formulations of Tables 1 and 2 was obtained from Ciba Specialty Chemicals under the trade name “IRGANOX L-06”.
The diphenylamine (b) used in the formulations of Tables 1 and 2 was obtained from Ciba Specialty Chemicals under the trade name “IRGANOX L-57”.

表１、２の配合物に使用したヒドロカルビル置換芳香族潤滑基油は、ＥｘｘｏｎＭｏｂｉｌから商品名“ＳＹＮＥＳＳＴＩＣ ５”で得られたアルキルナフタレンである。
表１、２の配合物に使用したＰＡＯ ４０基油は、Ｉｎｎｏｖｅｎｅから商品名“ＤＵＲＡＳＹＮ １７４”で得られたものである。 The hydrocarbyl substituted aromatic lubricating base oil used in the formulations of Tables 1 and 2 is an alkylnaphthalene obtained from ExxonMobil under the trade name “SYNESSTIC 5”.
The PAO 40 base oil used in the formulations of Tables 1 and 2 was obtained from Innovene under the trade name “DURASYN 174”.

表１の配合物に使用したＰＡＯ ８基油は、Ｉｎｎｏｖｅｎｅから商品名“ＤＵＲＡＳＹＮ １６８”で得られたものである。
表２の配合物に使用したＧＴＬ ８基油は、ＷＯ−Ａ−０２／０７０６３１に記載の方法で都合良く製造できる、１００℃での動粘度が約８ｃＳｔ（ｍｍ２ｓ−１）のフィッシャー・トロプシュ誘導基油である。 The PAO 8 base oil used in the formulations in Table 1 was obtained from Innovene under the trade name “DURASYN 168”.
The GTL 8 base oil used in the formulations of Table 2 can be conveniently manufactured by the method described in WO-A-02 / 070631, and has a kinematic viscosity at 100 ° C. of about 8 cSt (mm 2 s −1 ). Tropsch derived base oil.

実施例１及び実施例２は本発明による実施例であるが、表１、２に示す他の例は本来、比較例である。
表１、２の配合物について、酸化安定性を測定するため、回転式圧力容器酸化テスト（ＲＰＶＯＴ）（以前は回転式高圧噴霧容器酸化テスト（ＲＢＯＴ）として知られていた）（ＡＳＴＭ Ｄ２２７２）を行なった。 Examples 1 and 2 are examples according to the present invention, but the other examples shown in Tables 1 and 2 are originally comparative examples.
For the formulations in Tables 1 and 2, the rotary pressure vessel oxidation test (RPVOT) (formerly known as the rotary high pressure spray vessel oxidation test (RBOT)) (ASTM D2272) was used to measure oxidation stability. I did it.

更に、Ｗｏｌｆストリップテスト（以前はＤＩＮ ５１３９２として知られていた）を以下に述べる改良法で行なった。
以前、ＤＩＮ ５１３９２は、傾斜金属板にテストエンジンオイルをポンプ送りし、金属板上のエンジンオイルの熱／酸化沈着物生成傾向を測定していた。前記テストで規定された、油量、ポンプ送り速度、金属板温度及びテスト時間は、それぞれ２００ｍｌ、５０ｍｌ／ｈｒ、２５０℃、１２時間であった。 In addition, a Wolf strip test (formerly known as DIN 51392) was performed with the improved method described below.
Previously, DIN 51392 pumped test engine oil onto an inclined metal plate and measured the tendency of the engine oil on the metal plate to produce heat / oxidation deposits. The oil amount, pump feed rate, metal plate temperature, and test time specified in the test were 200 ml, 50 ml / hr, 250 ° C., and 12 hours, respectively.

このテストの繰返し性を改良すると共に、潤滑油組成物がコンプレッサーにおいて充分な流体力学的膜条件下で受ける熱／酸化応力型に一層密接にシミュレートさせるため、表１、２の例で使用した条件は、油量を１５０ｍｌ、ポンプ送り速度を５０ｍｌ／ｈｒ、金属板温度を２０５℃、テスト時間を２４時間に変更した。
表１及び表２から、本発明による配合物は、良好な沈着制御性ばかりでなく、回転式圧力容器酸化テスト（ＲＰＶＯＴ）において顕著な性能も示すことが明らかである。 Used in the examples in Tables 1 and 2 to improve the repeatability of this test and more closely simulate the thermal / oxidative stress types that the lubricating oil composition undergoes under sufficient hydrodynamic membrane conditions in the compressor. The conditions were changed to an oil amount of 150 ml, a pump feed rate of 50 ml / hr, a metal plate temperature of 205 ° C., and a test time of 24 hours.
From Tables 1 and 2, it is clear that the formulations according to the invention show not only good deposition control properties, but also outstanding performance in the rotary pressure vessel oxidation test (RPVOT).

Claims (11)

１種以上のヒドロカルビル置換芳香族潤滑基油と（ａ）１種以上のフェニル−ナフチルアミン及び（ｂ）１種以上のジフェニルアミンとの組合わせを含み、更にポリ−α−オレフィン及び／又はフィッシャー・トロプシュ誘導基油を含む１種以上の追加の潤滑基油を含む潤滑油組成物。   Comprising a combination of one or more hydrocarbyl-substituted aromatic lubricating base oils with (a) one or more phenyl-naphthylamines and (b) one or more diphenylamines, and further comprising poly-α-olefins and / or Fischer-Tropsch A lubricating oil composition comprising one or more additional lubricating base oils comprising a derived base oil. １種以上のヒドロカルビル置換芳香族潤滑基油が、アルキル化ナフタレン、アルキル化ベンゼン、アルキル化ジフェニル化合物及びアルキル化ジフェニルメタン、の１種以上から選ばれる請求項１に記載の潤滑油組成物。   The lubricating oil composition of claim 1, wherein the one or more hydrocarbyl-substituted aromatic lubricating base oil is selected from one or more of alkylated naphthalene, alkylated benzene, alkylated diphenyl compound, and alkylated diphenylmethane. １種以上のヒドロカルビル置換芳香族潤滑基油が、１種以上のアルキル化ナフタレンである請求項１又は２に記載の潤滑油組成物。   The lubricating oil composition according to claim 1 or 2, wherein the one or more hydrocarbyl-substituted aromatic lubricating base oil is one or more alkylated naphthalene. １種以上のフェニル−ナフチルアミンが、フェニル−α−ナフチルアミンである請求項１〜３のいずれか１項に記載の潤滑油組成物。   The lubricating oil composition according to any one of claims 1 to 3, wherein the one or more phenyl-naphthylamines are phenyl-α-naphthylamines. １種以上のジフェニルアミンが、ヒドロカルビル置換ジフェニルアミンである請求項１〜４のいずれか１項に記載の潤滑油組成物。   The lubricating oil composition according to any one of claims 1 to 4, wherein the one or more diphenylamines are hydrocarbyl-substituted diphenylamines. １種以上の極圧添加剤、１種以上の耐摩耗添加剤、１種以上の金属不活性化剤、１種以上の腐食防止剤、１種以上の消泡剤及び／又は１種以上の解乳化剤から選ばれた１種以上の添加剤を更に含む請求項１〜５のいずれか１項に記載の潤滑油組成物。   One or more extreme pressure additives, one or more antiwear additives, one or more metal deactivators, one or more corrosion inhibitors, one or more antifoams and / or one or more The lubricating oil composition according to any one of claims 1 to 5, further comprising one or more additives selected from demulsifiers. １種以上のフェニル−ナフチルアミンが、潤滑油組成物の合計重量に対し、全量で０．１〜５．０重量％の範囲含まれる請求項１〜６のいずれか１項に記載の潤滑油組成物。   The lubricating oil composition according to any one of claims 1 to 6, wherein the one or more phenyl-naphthylamines are included in a range of 0.1 to 5.0% by weight based on the total weight of the lubricating oil composition. object. １種以上のジフェニルアミンが、潤滑油組成物の合計重量に対し、全量で０．１〜５．０重量％の範囲含まれる請求項１〜７のいずれか１項に記載の潤滑油組成物。   The lubricating oil composition according to any one of claims 1 to 7, wherein the one or more diphenylamines are included in a total amount of 0.1 to 5.0% by weight with respect to the total weight of the lubricating oil composition. １種以上のヒドロカルビル置換芳香族潤滑基油が、潤滑油組成物の合計重量に対し、全量で０．１〜３０重量％の範囲含まれる請求項１〜８のいずれか１項に記載の潤滑油組成物。   The lubrication according to any one of claims 1 to 8, wherein the one or more hydrocarbyl-substituted aromatic lubricating base oils are included in a total amount of 0.1 to 30% by weight based on the total weight of the lubricating oil composition. Oil composition. １種以上のフェニル−ナフチルアミン（ａ）と１種以上のジフェニルアミン（ｂ）とが、１：３〜３：１の範囲の重量比で存在する請求項１〜８のいずれか１項に記載の潤滑油組成物   9. The method according to claim 1, wherein the one or more phenyl-naphthylamines (a) and the one or more diphenylamines (b) are present in a weight ratio ranging from 1: 3 to 3: 1. Lubricating oil composition 請求項１〜１０のいずれか１項に記載の潤滑油組成物をロータリーエアコンプレッサーの潤滑に使用する方法。

The method of using the lubricating oil composition of any one of Claims 1-10 for lubrication of a rotary air compressor.

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