JP2008179679A - Lubricant oil composition for rotary gas compressor, and rotary gas compressor filled therewith - Google Patents

Lubricant oil composition for rotary gas compressor, and rotary gas compressor filled therewith Download PDF

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Publication number
JP2008179679A
JP2008179679A JP2007013084A JP2007013084A JP2008179679A JP 2008179679 A JP2008179679 A JP 2008179679A JP 2007013084 A JP2007013084 A JP 2007013084A JP 2007013084 A JP2007013084 A JP 2007013084A JP 2008179679 A JP2008179679 A JP 2008179679A
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gas compressor
rotary gas
lubricating oil
oil composition
phosphate
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JP5352053B2 (en
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Hideto Kamimura
秀人 上村
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Idemitsu Kosan Co Ltd
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Idemitsu Kosan Co Ltd
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Priority to JP2007013084A priority Critical patent/JP5352053B2/en
Priority to EP07859965.1A priority patent/EP2128233B1/en
Priority to US12/524,176 priority patent/US20100008810A1/en
Priority to CN2007800502985A priority patent/CN101589133B/en
Priority to PCT/JP2007/074685 priority patent/WO2008090706A1/en
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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
    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • C10M171/02—Specified values of viscosity or viscosity index
    • 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
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen 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
    • 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
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/041—Triaryl phosphates
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/043—Ammonium or amine salts thereof
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/015—Distillation range
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • 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
    • C10N2030/02—Pour-point; Viscosity index
    • 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
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • 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

<P>PROBLEM TO BE SOLVED: To provide a lubricant oil composition for a rotary gas compressor, not only having sufficient lubricant oil properties but also having excellent energy saving effects and effects for reducing consumption of the lubricant oil, and to provide the rotary gas compressor filled with the lubricant oil. <P>SOLUTION: The lubricant oil composition for the rotary gas compressor has ≤5 mm<SP>2</SP>/s dynamic viscosity at 100°C, ≥200°C flash point and ≥350°C of 5 vol.% distillation temperature in distillation, and contains at least one of a phosphorus-based extreme-pressure agent and an antioxidant. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、回転ガス圧縮機用潤滑油組成物およびこれを充填した回転ガス圧縮機に関する。   The present invention relates to a lubricating oil composition for a rotary gas compressor and a rotary gas compressor filled with the same.

回転ガス圧縮機は、往復式ガス圧縮機に比べ、振動が少なく、大量の潤滑油を圧縮部に噴射させながら運転することで、吐き出しガスの温度を下げることが可能である。また、回転ガス圧縮機の中でも油冷式スクリュー圧縮機は，容積式でありながら回転式の特性もあわせもち，高効率，コンパクト，長期連続運転性などの特徴により産業界で広く使用されている（例えば、特許文献１、２）。また、このような圧縮機用の潤滑油としては、一般に１００℃における動粘度が５ｍｍ２／ｓを越えるような高粘度の潤滑油が用いられている。 The rotary gas compressor has less vibration than the reciprocating gas compressor, and can be operated while injecting a large amount of lubricating oil into the compression section, so that the temperature of the discharged gas can be lowered. Among rotary gas compressors, oil-cooled screw compressors are positive displacement and have rotary characteristics, and are widely used in the industry due to features such as high efficiency, compactness, and long-term continuous operation. (For example, Patent Documents 1 and 2). Further, as such a lubricating oil for a compressor, a lubricating oil having a high viscosity such that the kinematic viscosity at 100 ° C. exceeds 5 mm 2 / s is generally used.

特開平０９−１５１８７０号公報JP 09-151870 A 特開平１１−０１３６６１号公報Japanese Patent Laid-Open No. 11-013661

特許文献１、２のような従来の回転ガス圧縮機（油冷式スクリュー圧縮機）では、前記したように高粘度の潤滑油が用いられてきたため、回転ガス圧縮機の運転時における駆動力が過大となり、省エネルギーの観点からは十分な性能を発揮することができなかった。
そこで、本発明の目的は、十分な潤滑油性能を有するとともに、省エネルギー効果や潤滑油の消費量低減効果にも優れる回転ガス圧縮機用潤滑油組成物およびこれを充填した回転ガス圧縮機を提供することにある。 In conventional rotary gas compressors (oil-cooled screw compressors) such as Patent Documents 1 and 2, since high-viscosity lubricating oil has been used as described above, the driving force during operation of the rotary gas compressor is low. From the viewpoint of energy saving, sufficient performance could not be exhibited.
Accordingly, an object of the present invention is to provide a lubricating oil composition for a rotating gas compressor that has sufficient lubricating oil performance and is excellent in energy saving effect and reduced lubricating oil consumption, and a rotating gas compressor filled with the same. There is to do.

本発明者らは、前記課題を解決すべく鋭意検討した結果、動粘度、引火点および蒸留時の留出温度が特定の範囲にある潤滑油組成物が回転ガス圧縮機用として特に優れることを見出し、本発明に到達した。   As a result of intensive studies to solve the above problems, the present inventors have found that a lubricating oil composition having a specific range of kinematic viscosity, flash point and distillation temperature during distillation is particularly excellent for a rotary gas compressor. The headline, the present invention has been reached.

すなわち本発明は、以下のような回転ガス圧縮機用潤滑油組成物およびこれを充填した回転ガス圧縮機を提供するものである。
（１）１００℃における動粘度が５ｍｍ２／ｓ以下、引火点が２００℃以上、および蒸留における５容量％留出温度が３５０℃以上であることを特徴とする回転ガス圧縮機用潤滑油組成物。
（２）上記（１）に記載の回転ガス圧縮機用潤滑油組成物において、４０℃における動粘度が２８ｍｍ２／ｓ以下であることを特徴とする回転ガス圧縮機用潤滑油組成物。
（３）上記（１）または（２）に記載の回転ガス圧縮機用潤滑油組成物において、リン系極圧剤および酸化防止剤の少なくともいずれか一つを含有することを特徴とする回転ガス圧縮機用潤滑油組成物。
（４）上記（３）に記載の回転ガス圧縮機用潤滑油組成物において、前記リン系極圧剤が正リン酸エステルおよびリン酸エステルアミン塩の少なくともいずれか一つであることを特徴とする回転ガス圧縮機用潤滑油組成物。
（５）上記（３）または（４）に記載の回転ガス圧縮機用潤滑油組成物において、酸化防止剤がアミン系化合物、リン化合物、硫黄化合物およびリン・硫黄含有化合物の少なくともいずれか一つであることを特徴とする回転ガス圧縮機用潤滑油組成物。
（６）上記（１）〜（５）のいずれかに記載の回転ガス圧縮機用潤滑油組成物を充填したことを特徴とする回転ガス圧縮機。 That is, the present invention provides the following lubricating oil composition for a rotary gas compressor and a rotary gas compressor filled therewith.
(1) A kinematic viscosity at 100 ° C. of 5 mm 2 / s or less, a flash point of 200 ° C. or more, and a 5 vol% distillation temperature in distillation of 350 ° C. or more, and a lubricating oil composition for a rotary gas compressor object.
(2) The lubricating oil composition for a rotary gas compressor according to the above (1), wherein the kinematic viscosity at 40 ° C. is 28 mm 2 / s or less.
(3) The rotating gas compressor lubricating oil composition as described in (1) or (2) above, wherein the rotating gas contains at least one of a phosphorus extreme pressure agent and an antioxidant. Lubricating oil composition for a compressor.
(4) In the lubricating oil composition for a rotary gas compressor according to (3), the phosphorus extreme pressure agent is at least one of a normal phosphate ester and a phosphate ester amine salt. A lubricating oil composition for a rotating gas compressor.
(5) In the lubricating oil composition for a rotary gas compressor according to the above (3) or (4), the antioxidant is at least one of an amine compound, a phosphorus compound, a sulfur compound, and a phosphorus / sulfur-containing compound. A lubricating oil composition for a rotary gas compressor.
(6) A rotary gas compressor filled with the lubricating oil composition for a rotary gas compressor according to any one of (1) to (5) above.

本発明の回転ガス圧縮機用潤滑油組成物によれば、回転ガス圧縮機に充填して運転した際に、十分な潤滑性能を維持できるとともに、動粘度が低いために省エネルギー効果にも優れる。しかも、本潤滑油組成物の蒸発性が低いために回転ガス圧縮機を長時間運転してもその損失が少ない。このような本発明の回転ガス圧縮機用潤滑油組成物は、特に、油冷式スクリュー圧縮機に充填した場合にその効果が著しい。   According to the lubricating oil composition for a rotary gas compressor of the present invention, when the rotary gas compressor is filled and operated, sufficient lubrication performance can be maintained, and since the kinematic viscosity is low, the energy saving effect is also excellent. Moreover, since the lubricating oil composition has low evaporability, the loss is small even if the rotary gas compressor is operated for a long time. Such a lubricating oil composition for a rotary gas compressor of the present invention is particularly effective when filled in an oil-cooled screw compressor.

以下、本発明の実施形態を詳細に説明する。本発明の回転ガス圧縮機用潤滑油組成物（以下、「本組成物」ともいう。）は、潤滑油基油と添加剤とから構成され、１００℃における動粘度が５ｍｍ２／ｓ以下、引火点が２００℃以上、および蒸留における５容量％留出温度が３５０℃以上である。
ここで、潤滑油基油は、特に限定されるものではなく、通常潤滑油の基油として使用されているものであれば鉱油および合成油を問わず使用できる。
鉱油としては、例えば、原油を常圧蒸留および減圧蒸留して得られた潤滑油留分を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、水素化精製、硫酸洗浄、あるいは白土処理等の精製処埋を適宜組み合わせて精製したパラフィン系、ナフテン系などの基油が好適に使用できる。 Hereinafter, embodiments of the present invention will be described in detail. The lubricating oil composition for a rotary gas compressor of the present invention (hereinafter also referred to as “the present composition”) is composed of a lubricating base oil and an additive, and has a kinematic viscosity at 100 ° C. of 5 mm 2 / s or less, The flash point is 200 ° C. or higher, and the 5 vol% distillation temperature in distillation is 350 ° C. or higher.
Here, the lubricating base oil is not particularly limited, and any mineral oil or synthetic oil can be used as long as it is normally used as a base oil for lubricating oil.
As mineral oils, for example, lubricating oil fractions obtained by subjecting crude oil to atmospheric distillation and vacuum distillation can be used for solvent removal, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing Alternatively, base oils such as paraffinic and naphthenic oils, which are refined by appropriately combining refining treatment such as white clay treatment, can be suitably used.

また、合成油としては、例えば、ポリα−オレフィン（１−オクテンオリゴマー、１−デセンオリゴマーなど）、ポリブテン、イソパラフィン、オレフィンコポリマー（エチレン−プロピレン共重合体など）、アルキルベンゼン、アルキルナフタレン、モノエステル（ブチルステアレート等）、二塩基酸エステル（ジトリデシルグルタレート、ジ−２−エチルヘキシルアジペート、ジイソデシルアジペート、ジトリデシルアジペート、ジ−２−エチルヘキシルセバケート等）、三塩基酸エステル（トリメリット酸エステル等）、ポリオールエステル（トリメチロールプロパンカプリレート、トリメチロールプロパンペラルゴネート、ペンタエリスリトール２−エチルヘキサノエート、ペンタエリスリトールペラルゴネート等）、ポリオキシアルキレングリコール、ジアルキルジフェニルエーテル、アルキルジフェニルサルファイド、ポリフェニルエーテル、シリコーンオイル（ジメチルシリコーンなど）、パーフルオロポリエーテルなどが好適に使用できる。   Synthetic oils include, for example, poly α-olefin (1-octene oligomer, 1-decene oligomer, etc.), polybutene, isoparaffin, olefin copolymer (ethylene-propylene copolymer, etc.), alkylbenzene, alkylnaphthalene, monoester ( Butyl stearate, etc.), dibasic acid esters (ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sebacate, etc.), tribasic acid esters (trimellitic acid ester, etc.) ), Polyol esters (trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 2-ethylhexanoate, pentaerythritol pelargonate, etc.), polyoxya Sharp glycol, dialkyl ether, alkyl diphenyl sulfide, polyphenyl ether, silicone oil (dimethyl silicone, etc.), etc. perfluoropolyether are preferably used.

これらの鉱油や合成油は単独で使用しても良く、またこれらの中から選ばれる２種以上の基油を任意の割合で混合して使用してもよい。
また、本組成物で使用する基油の粘度は任意であるが、潤滑性、冷却性および攪拌時における摩擦損失を考慮すると、４０℃における動粘度が1〜１００００ｍｍ２／ｓ、好ましくは５〜１００、さらに好ましくは、１０〜６８ｍｍ２／ｓのものを用いるのが望ましい。なお、本組成物に用いる基油としてはＡＰＩ分類グループII〜IVから選定するとよい。 These mineral oils and synthetic oils may be used alone, or two or more kinds of base oils selected from these may be mixed and used in an arbitrary ratio.
The viscosity of the base oil used in the present composition is arbitrary, but considering the lubricity, cooling properties, and friction loss during stirring, the kinematic viscosity at 40 ° C. is 1 to 10000 mm 2 / s, preferably 5 to It is desirable to use 100, more preferably 10 to 68 mm 2 / s. The base oil used in the present composition may be selected from API classification groups II to IV.

本発明の回転ガス圧縮機用潤滑油組成物には、リン系極圧剤および酸化防止剤の少なくともいずれか一つを含有することが好ましい。
ここでリン系極圧剤としては、正リン酸エステル類、亜リン酸エステル類、酸性リン酸エステル類、酸性亜リン酸エステル類あるいはこれらのアミン塩が好ましい。
正リン酸エステルとしては、トリアリールホスフェート、トリアルキルホスフェート、トリアルキルアリールホスフェート、トリアリールアルキルホスフェート、トリアルケニルホスフェートなどがあり、具体的には、例えば、トリフェニルホスフェート、トリクレジルホスフェート、ベンジルジフェニルホスフェート、エチルジフェニルホスフェート、トリブチルホスフェート、エチルジブチルホスフェート、クレジルジフェニルホスフェート、ジクレジルフェニルホスフェート、エチルフェニルジフェニルホスフェート、ジエチルフェニルフェニルホスフェート、プロピルフェニルジフェニルホスフェート、ジプロピルフェニルフェニルホスフェート、トリエチルフェニルホスフェート、トリプロピルフェニルホスフェート、ブチルフェニルジフェニルホスフェート、ジブチルフェニルフェニルホスフェート、トリブチルフェニルホスフェート、トリヘキシルホスフェート、トリノルマルオクチルフォスフェート、トリ（２−エチルヘキシル）ホスフェート、トリデシルホスフェート、トリラウリルホスフェート、トリミリスチルホスフェート、トリパルミチルホスフェート、トリステアリルホスフェート、トリオレイルホスフェート、
などが挙げられる。 The lubricating oil composition for a rotary gas compressor of the present invention preferably contains at least one of a phosphorus extreme pressure agent and an antioxidant.
Here, as the phosphorous extreme pressure agent, orthophosphoric acid esters, phosphites, acidic phosphates, acidic phosphites or amine salts thereof are preferable.
Examples of the normal phosphate ester include triaryl phosphate, trialkyl phosphate, trialkylaryl phosphate, triarylalkyl phosphate, and trialkenyl phosphate. Specific examples thereof include triphenyl phosphate, tricresyl phosphate, and benzyldiphenyl. Phosphate, ethyl diphenyl phosphate, tributyl phosphate, ethyl dibutyl phosphate, cresyl diphenyl phosphate, dicresyl phenyl phosphate, ethyl phenyl diphenyl phosphate, diethyl phenyl phenyl phosphate, propyl phenyl diphenyl phosphate, dipropyl phenyl phenyl phosphate, triethyl phenyl phosphate, tripropyl Phenyl phosphate, butyl phenol Rudiphenyl phosphate, dibutylphenyl phenyl phosphate, tributylphenyl phosphate, trihexyl phosphate, tri-normal octyl phosphate, tri (2-ethylhexyl) phosphate, tridecyl phosphate, trilauryl phosphate, trimyristyl phosphate, tripalmityl phosphate, tristearyl Phosphate, trioleyl phosphate,
Etc.

亜リン酸エステルとしては、例えば、トリエチルホスファイト、トリブチルホスファイト、トリフェニルホスファイト、トリクレジルホスファイト、トリ（ノニルフェニル）ホスファイト、トリ（２−エチルヘキシル）ホスファイト、トリデシルホオスファイト、トリラウリルホスファイト、トリイソオクチルホスファイト、ジフェニルイソデシルホスファイト、トリステアリルホスファイト、トリオレイルホスファイトなどが挙げられる。
酸性リン酸エステルとしては、例えば、２−エチルヘキシルアシッドホスフェート、ジノルマルオクチルアシッドフォスフェート、エチルアシッドホスフェート、ブチルアシッドホスフェート、オレイルアシッドホスフェート、テトラコシルアシッドホスフェート、イソデシルアシッドホスフェート、ラウリルアシッドホスフェート、トリデシルアシッドホスフェート、ステアリルアシッドホスフェート、イソステアリルアシッドホスフェートなどが挙げられる。 Examples of phosphites include triethyl phosphite, tributyl phosphite, triphenyl phosphite, tricresyl phosphite, tri (nonylphenyl) phosphite, tri (2-ethylhexyl) phosphite, tridecyl phosphite , Trilauryl phosphite, triisooctyl phosphite, diphenylisodecyl phosphite, tristearyl phosphite, trioleyl phosphite and the like.
Examples of the acidic phosphate ester include 2-ethylhexyl acid phosphate, di-normal octyl acid phosphate, ethyl acid phosphate, butyl acid phosphate, oleyl acid phosphate, tetracosyl acid phosphate, isodecyl acid phosphate, lauryl acid phosphate, tril Examples include decyl acid phosphate, stearyl acid phosphate, and isostearyl acid phosphate.

酸性亜リン酸エステルとしては、例えば、ジエチルハイドロジェンフォスファイト、ジブチルハイドロゲンホスファイト、ジラウリルハイドロゲンホスファイト、ジオレイルハイドロゲンホスファイト、ジステアリルハイドロゲンホスファイト、ジフェニルハイドロゲンホスファイトなどが挙げられる。さらに、これらとアミン塩を形成するアミン類としては、例えば、下記式（１）で表されるモノ置換アミン、ジ置換アミン又はトリ置換アミンが挙げられる。式（１）におけるＲのうちの炭素数３〜３０のアルキル基もしくはアルケニル基は、直鎖状、分岐状、環状のいずれであってもよい。
ＲnＮＨ3-n （１）
（式中、Ｒは、炭素数３〜３０、好ましくは炭素数４〜１８のアルキル基もしくはアルケニル基、炭素数６〜３０、好ましくは炭素数６〜１５のアリール基もしくはアリールアルキル基又は炭素数２〜３０、好ましくは炭素数２〜１８のヒドロキシアルキル基を示し、ｎは１、２又は３を示す。また、Ｒが複数ある場合、複数のＲは同一でも異なっていてもよい。） Examples of the acidic phosphite include diethyl hydrogen phosphite, dibutyl hydrogen phosphite, dilauryl hydrogen phosphite, dioleyl hydrogen phosphite, distearyl hydrogen phosphite, diphenyl hydrogen phosphite and the like. Furthermore, examples of amines that form amine salts with these include mono-substituted amines, di-substituted amines, and tri-substituted amines represented by the following formula (1). The alkyl group or alkenyl group having 3 to 30 carbon atoms in R in Formula (1) may be linear, branched, or cyclic.
R n NH 3-n (1)
(In the formula, R is an alkyl or alkenyl group having 3 to 30 carbon atoms, preferably 4 to 18 carbon atoms, an aryl group or arylalkyl group having 6 to 30 carbon atoms, preferably 6 to 15 carbon atoms, or a carbon number. 2-30, preferably a C2-C18 hydroxyalkyl group, n is 1, 2 or 3. In addition, when there are a plurality of R, the plurality of R may be the same or different.

モノ置換アミンとしては、ブチルアミン、ペンチルアミン、ヘキシルアミン、シクロヘキシルアミン、オクチルアミン、ラウリルアミン、ステアリルアミン、オレイルアミン、ベンジルアミンなどを挙げることができる。ジ置換アミンとしては、ジブチルアミン、ジペンチルアミン、ジヘキシルアミン、ジシクロヘキシルアミン、ジオクチルアミン、ジラウリルアミン、ジステアリルアミン、ジオレイルアミン、ジベンジルアミン、ステアリル・モノエタノールアミン、デシル・モノエタノールアミン、ヘキシル・モノプロパノールアミン、ベンジル・モノエタノールアミン、フェニル・モノエタノールアミン、トリル・モノプロパノールなどが挙げられる。トリ置換アミンとしては、トリブチルアミン、トリペンチルアミン、トリヘキシルアミン、トリシクロヘキシルアミン、トリオクチルアミン、トリラウリルアミン、トリステアリルアミン、トリオレイルアミン、トリベンジルアミン、ジオレイル・モノエタノールアミン、ジラウリル・モノプロパノールアミン、ジオクチル・モノエタノールアミン、ジヘキシル・モノプロパノールアミン、ジブチル・モノプロパノールアミン、オレイル・ジエタノールアミン、ステアリル・ジプロパノールアミン、ラウリル・ジエタノールアミン、オクチル・ジプロパノールアミン、ブチル・ジエタノールアミン、ベンジル・ジエタノールアミン、フェニル・ジエタノールアミン、トリル・ジプロパノールアミン、キシリル・ジエタノールアミン、トリエタノールアミン、トリプロパノールアミン、ターシャリードデシルアミンなどが挙げられる。
これらのリン系極圧剤のなかでは、耐熱性の観点よりトリクレジルフォスフェートやジエチルハイドロジェンフォスファイトターシャリードデシルアミン塩が好ましい。
これらの極圧剤の配合量は、配合効果及び経済性の点から、潤滑油組成物全量基準で、通常０．０１〜３０質量％程度であり、より好ましくは０．０１〜１０質量％である。 Examples of the mono-substituted amine include butylamine, pentylamine, hexylamine, cyclohexylamine, octylamine, laurylamine, stearylamine, oleylamine, and benzylamine. Disubstituted amines include dibutylamine, dipentylamine, dihexylamine, dicyclohexylamine, dioctylamine, dilaurylamine, distearylamine, dioleylamine, dibenzylamine, stearyl monoethanolamine, decyl monoethanolamine, hexyl Examples include monopropanolamine, benzyl monoethanolamine, phenyl monoethanolamine, and tolyl monopropanol. Tri-substituted amines include tributylamine, tripentylamine, trihexylamine, tricyclohexylamine, trioctylamine, trilaurylamine, tristearylamine, trioleylamine, tribenzylamine, dioleyl monoethanolamine, dilauryl monopropanolamine , Dioctyl monoethanolamine, dihexyl monopropanolamine, dibutyl monopropanolamine, oleyl diethanolamine, stearyl dipropanolamine, lauryl diethanolamine, octyl dipropanolamine, butyl diethanolamine, benzyl diethanolamine, phenyl diethanolamine , Tolyl dipropanolamine, xylyl diethanolamine, trieta Ruamin, tripropanolamine, etc. tertiary dodecyl amine.
Among these phosphorus-based extreme pressure agents, tricresyl phosphate and diethyl hydrogen phosphite terrestrial decylamine salt are preferable from the viewpoint of heat resistance.
The blending amount of these extreme pressure agents is usually about 0.01 to 30% by weight, more preferably 0.01 to 10% by weight, based on the total amount of the lubricating oil composition, from the viewpoint of blending effect and economy. is there.

酸化防止剤としては、アミン系化合物、リン化合物、硫黄化合物およびリン・硫黄含有化合物やフェノール系化合物など、潤滑油に一般的に使用されているものであれば使用可能である。例えば、アミン系化合物としては、モノオクチルジフェニルアミン、モノノニ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系化合物、４，４’−ジブチルジフェニルアミン、４，４’−ジペンチルジフェニルアミン、４，４’−ジヘキシルジフェニルアミン、４，４’−ジヘプチルジフェニルアミン、４，４’−ジオクチルジフェニルアミン、４，４’−ジノニルジフェニルアミンなどのジアルキルジフェニルアミン系化合物、テトラブチルジフェニルアミン、テトラヘキシルジフェニルアミン、テトラオクチルジフェニルアミン、テトラノニルジフェニルアミンなどのポリアルキルジフェニルアミン系化合物、α−ナフチルアミン、フェニル−α−ナフチルアミン、ブチルフェニル−α−ナフチルアミン、ペンチルフェニル−α−ナフチルアミン、ヘキシルフェニル−α−ナフチルアミン、ヘプチルフェニル−α−ナフチルアミン、オクチルフェニル−α−ナフチルアミン、ノニルフェニル−α−ナフチルアミン、デシルフェニル−α−ナフチルアミン、ドデシルフェニル−α−ナフチルアミンなどのナフチルアミン系化合物が挙げられる。   As the antioxidant, amine compounds, phosphorus compounds, sulfur compounds, phosphorus / sulfur-containing compounds, phenol compounds, and the like that are generally used in lubricating oils can be used. For example, examples of the amine compound include monoalkyldiphenylamine compounds such as monooctyldiphenylamine and monononyldiphenylamine, 4,4′-dibutyldiphenylamine, 4,4′-dipentyldiphenylamine, 4,4′-dihexyldiphenylamine, 4,4 Dialkyldiphenylamine compounds such as' -diheptyldiphenylamine, 4,4'-dioctyldiphenylamine, 4,4'-dinonyldiphenylamine, polyalkyldiphenylamines such as tetrabutyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, tetranonyldiphenylamine Compound, α-naphthylamine, phenyl-α-naphthylamine, butylphenyl-α-naphthylamine, pentylphenyl-α Naphthylamine compounds such as naphthylamine, hexylphenyl-α-naphthylamine, heptylphenyl-α-naphthylamine, octylphenyl-α-naphthylamine, nonylphenyl-α-naphthylamine, decylphenyl-α-naphthylamine, dodecylphenyl-α-naphthylamine It is done.

リン化合物、硫黄化合物およびリン・硫黄含有化合物としては、例えば、ジエチル［［３，５−ビス（１，１−ジメチルエチル−４−ヒドロキシフェニル］メチル］ホスフォネートのようなリン化合物、ジ−２−エチルヘキシルジチオリン酸亜鉛のようなジアルキルジチオリン酸亜鉛類、２，６−ジ−ｔｅｒｔ−ブチル−４−（４，６−ビス（オクチルチオ）−１，３，５−トリアジン−２−イルアミノ）フェノール、五硫化リンとピネンとの反応物などのチオテルペン系化合物、ジラウリルチオジプロピオネート、ジステアリルチオジプロピオネートなどのジアルキルチオジプロピオネートなどが挙げられる。
フェノール系化合物として、２，６−ジ−ｔｅｒｔ−ブチル−４−メチルフェノールなどのアルキルフェノール類、メチレン−４，４−ビス（２，６−ジ−ｔｅｒｔ−ブチル−４−メチルフェノール）などのビスフェノール類が挙げられる。
これらの酸化防止剤の中では、耐熱性の点でジエチル［［３，５−ビス（１，１−ジメチルエチル−４−ヒドロキシフェニル］メチル］ホスフォネートが好ましい。
また、これらの酸化防止剤の配合量は、潤滑油全量基準で、通常０．０１〜１０質量％程度であり、好ましくは０．０３〜５質量％である。 Examples of phosphorus compounds, sulfur compounds, and phosphorus / sulfur-containing compounds include phosphorus compounds such as diethyl [[3,5-bis (1,1-dimethylethyl-4-hydroxyphenyl] methyl] phosphonate, di-2- Zinc dialkyldithiophosphates such as zinc ethylhexyldithiophosphate, 2,6-di-tert-butyl-4- (4,6-bis (octylthio) -1,3,5-triazin-2-ylamino) phenol, five Examples thereof include thioterpene compounds such as a reaction product of phosphorus sulfide and pinene, dialkylthiodipropionates such as dilauryl thiodipropionate and distearyl thiodipropionate.
Examples of phenolic compounds include alkylphenols such as 2,6-di-tert-butyl-4-methylphenol, and bisphenols such as methylene-4,4-bis (2,6-di-tert-butyl-4-methylphenol). Kind.
Among these antioxidants, diethyl [[3,5-bis (1,1-dimethylethyl-4-hydroxyphenyl] methyl] phosphonate is preferable from the viewpoint of heat resistance.
Moreover, the compounding quantity of these antioxidants is about 0.01-10 mass% normally on the basis of lubricating oil whole quantity, Preferably it is 0.03-5 mass%.

本組成物は、上述した基油と各種の添加剤とから好ましく構成されるが、１００℃における動粘度（ＪＩＳ Ｋ ２２８３準拠）は、５ｍｍ２／ｓ以下であり、好ましくは、４．９５ｍｍ２／ｓ以下、より好ましくは、４．５ｍｍ２／ｓ以下である。１００℃における動粘度が５ｍｍ２／ｓを越えると、回転ガス圧縮機の駆動力が過大となる。
本組成物の引火点（Ｃ.Ｏ.Ｃ、ＪＩＳ Ｋ ２２６５準拠）は、２００℃以上であり、好ましくは２１０℃以上、より好ましくは２２０℃以上である。引火点が２００℃未満であると、本組成物を充填した回転ガス圧縮機を運転した際に引火する危険が増す。
本組成物の蒸留における５容量％留出温度（ＪＩＳ Ｋ ２２５４準拠）は、３５０℃以上であり、好ましくは３７０℃以上、より好ましくは３９０℃以上である。５容量％留出温度が３５０℃未満であると、回転ガス圧縮機を長時間運転した際に潤滑油の消費量が増加して好ましくない。
上述した本組成物を潤滑油として充填した回転ガス圧縮機は、潤滑油消費量も少なく、また十分な潤滑性能を維持できるとともに、省エネルギー効果にも優れ、特に、油冷式スクリュー圧縮機に充填した場合に冷却性および耐熱性に優れる点で、その効果が著しい。
また、本組成物の４０℃における動粘度は、２８ｍｍ２／ｓ以下であることが好ましく、より好ましくは２５ｍｍ２／ｓ以下、さらに好ましくは２３でｍｍ２／ｓ以下である。４０℃における動粘度が２８ｍｍ２／ｓを越えると、回転ガス圧縮機の駆動力が過大となる。 The composition is preferably composed of the above-described base oil and various additives, and the kinematic viscosity at 100 ° C. (according to JIS K 2283) is 5 mm 2 / s or less, preferably 4.95 mm 2. / S or less, more preferably 4.5 mm 2 / s or less. When the kinematic viscosity at 100 ° C. exceeds 5 mm 2 / s, the driving force of the rotary gas compressor becomes excessive.
The flash point of the present composition (conforming to C.O.C, JIS K 2265) is 200 ° C. or higher, preferably 210 ° C. or higher, more preferably 220 ° C. or higher. When the flash point is less than 200 ° C., there is an increased risk of ignition when the rotary gas compressor filled with the composition is operated.
The 5% by volume distillation temperature (according to JIS K 2254) in distillation of the composition is 350 ° C. or higher, preferably 370 ° C. or higher, more preferably 390 ° C. or higher. When the 5% by volume distillation temperature is less than 350 ° C., the consumption of lubricating oil increases when the rotary gas compressor is operated for a long time, which is not preferable.
The rotary gas compressor filled with the above-described composition as a lubricating oil consumes less lubricating oil, can maintain sufficient lubrication performance, and has an excellent energy saving effect. Especially, it fills an oil-cooled screw compressor. In that case, the effect is remarkable in terms of excellent cooling and heat resistance.
Further, the kinematic viscosity at 40 ° C. of the composition is preferably 28 mm 2 / s or less, more preferably 25 mm 2 / s or less, and further preferably 23 and mm 2 / s or less. When the kinematic viscosity at 40 ° C. exceeds 28 mm 2 / s, the driving force of the rotary gas compressor becomes excessive.

なお、本発明の回転ガス圧縮機用潤滑油組成物には、他に必要に応じて油性剤、防錆剤、清浄分散剤および金属不活性化剤を添加することができる。
油性剤としては、脂肪族アルコール、脂肪酸や脂肪酸金属塩などの脂肪酸系化合物、ポリオールエステル、ソルビタンエステル、グリセライドなどのエステル化合物、脂肪族アミンなどのアミン化合物などを挙げることができる。これらの化合物中では、耐熱性と潤滑性とを両立させることができる点でエステル化合物が好ましい。
これらの油性剤の配合量は、配合効果の点から、潤滑油組成物全量基準で、通常０．１〜３０質量％程度であり、好ましくは０．５〜１０質量％である。 In addition, an oiliness agent, a rust preventive agent, a cleaning dispersant, and a metal deactivator can be added to the lubricating oil composition for a rotary gas compressor of the present invention as necessary.
Examples of the oily agent include aliphatic alcohols, fatty acid compounds such as fatty acids and fatty acid metal salts, ester compounds such as polyol esters, sorbitan esters, and glycerides, and amine compounds such as aliphatic amines. Among these compounds, ester compounds are preferable in that both heat resistance and lubricity can be achieved.
The blending amount of these oiliness agents is usually about 0.1 to 30% by mass, preferably 0.5 to 10% by mass, based on the total amount of the lubricating oil composition, from the viewpoint of the blending effect.

防錆剤としては、例えば、金属スルホネート、脂肪族アミン類、有機亜リン酸エステル、有機リン酸エステル、有機スルフォン酸金属塩、有機リン酸金属塩、アルケニルコハク酸エステル、多価アルコールエステルなどが挙げられる。これら防錆剤の配合量は、配合効果の点から、潤滑油組成物全量基準で、通常０．０１〜１０質量％程度であり、好ましくは０．０５〜５質量％である。   Examples of the rust preventive include metal sulfonates, aliphatic amines, organic phosphites, organic phosphates, organic sulfonates, organic phosphates, alkenyl succinates, polyhydric alcohol esters, and the like. Can be mentioned. The blending amount of these rust preventives is usually about 0.01 to 10% by mass, preferably 0.05 to 5% by mass, based on the total amount of the lubricating oil composition, from the viewpoint of the blending effect.

清浄分散剤としては、金属スルホネート、金属サリチレート、金属フィネート、コハク酸イミドなどが挙げられる。これらの中では、清浄分散性と、抗乳化特性との兼ね合いから金属系清浄分散剤が好ましい。
これら清浄分散剤の配合量は、配合効果の点から、潤滑油組成物全量基準で、通常０．１〜３０質量％程度であり、好ましくは０．５〜１０質量％である。 Examples of the cleaning dispersant include metal sulfonate, metal salicylate, metal finate, and succinimide. Among these, a metal-based detergent / dispersant is preferable in view of the balance between clean dispersibility and anti-emulsification properties.
The blending amount of these detergent dispersants is usually about 0.1 to 30% by mass, preferably 0.5 to 10% by mass, based on the total amount of the lubricating oil composition, from the viewpoint of the blending effect.

金属不活性剤としては、ベンゾトリアゾール類、チアジアゾール類などを挙げることができる。これら金属不活性化剤の好ましい配合量は、配合効果の点から、潤滑油組成物全量基準で、通常０．０１〜１０質量％程度であり、好ましくは０．０１〜１質量％である。
消泡剤としては、メチルシリコーン油、フルオロシリコーン油、ポリアクリレートなどを挙げることができる。これらの消泡剤の配合量は、配合効果の点から、潤滑油組成物全量基準で、通常０．０００５〜０．０１質量％程度である。 Examples of the metal deactivator include benzotriazoles and thiadiazoles. The preferred compounding amount of these metal deactivators is usually about 0.01 to 10% by mass, preferably 0.01 to 1% by mass, based on the total amount of the lubricating oil composition, from the viewpoint of the blending effect.
Examples of the antifoaming agent include methyl silicone oil, fluorosilicone oil, and polyacrylate. The blending amount of these antifoaming agents is usually about 0.0005 to 0.01% by mass based on the total amount of the lubricating oil composition from the viewpoint of blending effect.

以下、実施例および比較例を挙げて、本発明をより詳細に説明するが、本発明は実施例等の内容に何ら限定されるものではない。
〔実施例１〜６、比較例１，２〕
所定の基油（ＡＰＩ分類グループI〜IV）に添加剤を配合して各性状の潤滑油組成物を調製し、耐荷重特性、耐摩耗特性、蒸発量および実機消費電力について評価した。潤滑油組成物の性状測定方法および各評価方法を以下に示す。また、評価結果を表１に示す。 EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to the content of an Example etc. at all.
[Examples 1 to 6, Comparative Examples 1 and 2]
Lubricating oil compositions having various properties were prepared by blending additives into predetermined base oils (API classification groups I to IV), and the load bearing characteristics, wear resistance characteristics, evaporation, and actual power consumption were evaluated. The property measuring method and each evaluation method of the lubricating oil composition are shown below. The evaluation results are shown in Table 1.

（１．潤滑油組成物の性状）
以下に、各性状の測定方法（規格）を示す。
（1.1）動粘度（１００℃、４０℃）：ＪＩＳ Ｋ ２２８３準拠
（1.2）粘度指数：ＪＩＳ Ｋ ２２８３準拠
（1.3）密度（１５℃）：ＪＩＳ Ｋ ２２４９準拠
（1.4）引火点（Ｃ.Ｏ.Ｃ）：ＪＩＳ Ｋ ２２６５準拠
（1.5）蒸留性状（５容量％留出温度、１０容量％留出温度）： ＪＩＳ Ｋ ２２５４準拠（１３３ＭＰａの減圧下に蒸留を行い、大気圧下の値に換算した。） (1. Properties of lubricating oil composition)
Below, the measuring method (standard) of each property is shown.
(1.1) Kinematic viscosity (100 ° C., 40 ° C.): JIS K 2283 compliant (1.2) Viscosity index: JIS K 2283 compliant (1.3) Density (15 ° C.): JIS K 2249 compliant (1.4) Flash point (C.O. C): Conforms to JIS K 2265 (1.5) Distillation properties (5 vol% distillation temperature, 10 vol% distillation temperature): Conforms to JIS K 2254 (distilled under a reduced pressure of 133 MPa and converted to a value under atmospheric pressure) .)

（２．評価項目・評価方法）
（2.1）耐荷重性試験（シェルＥＰ試験）：
ＡＳＴＭ Ｄ２７８３に準拠して、回転数１，８００ｒｐｍ、室温の条件で行った。最大非焼付荷重（ＬＮＬ）と融着荷重（ＷＬ）から荷重摩耗指数（ＬＷＩ）を求めた。この値が大きいほど耐荷重性が良好である。
（2.2）耐摩耗性試験（シェル摩耗試験）：
ＡＳＴＭ Ｄ２７８３に準拠して、荷重３９２Ｎ、回転数１，２００ｒｐｍ、油温８０℃、試験時間６０分の条件で行った。１／２インチ球３個の摩耗痕径を平均して平均摩耗痕径を算出した。
（2.3）薄膜残渣試験：
ＪＩＳ Ｋ ２５４０に準拠した容器に、サンプルを１ｇ充填し、１５０℃の恒温雰囲気のもと、空気を流通量１０Ｌ／ｈの条件で６時間流して、試験後のサンプル（蒸発残渣）の質量を測定した。当初のサンプル量に対する蒸発残渣の量を質量百分率で示した。
（2.4）実機消費電力量：
回転ガス圧縮機として、市販の油冷式スクリュー圧縮機（モータ出力：２２ｋＷ、油量：１０Ｌ、吸込気体：空気、吸込圧力：大気圧、吸込温度：２５℃）を用い、平均油温８０℃において、市販のクランプオンセンサー型電力計により、連続運転３時間における圧縮用モータの有効消費電力を測定した。
なお、計測は、以下の２通りの運転モードで実施した。
運転モードI：吐出圧力 ０．６５ＭＰａ
運転モードII：吐出圧力 ０．２４ＭＰａ (2. Evaluation items and evaluation methods)
(2.1) Load resistance test (shell EP test):
In accordance with ASTM D2783, it was performed under conditions of a rotation speed of 1,800 rpm and room temperature. The load wear index (LWI) was determined from the maximum non-seizure load (LNL) and the fusion load (WL). The larger this value, the better the load resistance.
(2.2) Wear resistance test (shell wear test):
In accordance with ASTM D2783, the test was performed under the conditions of a load of 392 N, a rotation speed of 1,200 rpm, an oil temperature of 80 ° C., and a test time of 60 minutes. The average wear scar diameter was calculated by averaging the wear scar diameters of three 1/2 inch spheres.
(2.3) Thin film residue test:
1 g of the sample is filled in a container conforming to JIS K 2540, and air is allowed to flow for 6 hours under a constant temperature atmosphere of 150 ° C. under a flow rate of 10 L / h, and the mass of the sample (evaporation residue) after the test is measured. It was measured. The amount of evaporation residue with respect to the initial sample amount was expressed as a mass percentage.
(2.4) Actual power consumption:
As a rotating gas compressor, a commercially available oil-cooled screw compressor (motor output: 22 kW, oil amount: 10 L, suction gas: air, suction pressure: atmospheric pressure, suction temperature: 25 ° C.), average oil temperature 80 ° C. , The effective power consumption of the compression motor for 3 hours of continuous operation was measured with a commercially available clamp-on sensor wattmeter.
The measurement was performed in the following two operation modes.
Operation mode I: Discharge pressure 0.65 MPa
Operation mode II: Discharge pressure 0.24 MPa

Figure 2008179679
Figure 2008179679

〔評価結果〕
表１の結果より、本組成物を用いた実施例１〜６では、いずれも、潤滑油としての潤滑性能に優れるだけでなく、省エネルギー効果に優れ、そして潤滑油の消費量も少ないことがわかる。一方、比較例１では、１００℃動粘度が高く、回転ガス圧縮機の消費電力が大きい。また、１００℃動粘度が高い割には潤滑油消費量もやや多い。比較例２では、蒸留における５容量％留出温度が低いため潤滑油の消費量が過大となり、回転ガス圧縮機を長時間運転することが困難となる。 〔Evaluation results〕
From the results of Table 1, it can be seen that in Examples 1 to 6 using the present composition, not only the lubricating performance as the lubricating oil is excellent, but also the energy saving effect is excellent, and the consumption amount of the lubricating oil is small. . On the other hand, in the comparative example 1, 100 degreeC kinematic viscosity is high and the power consumption of a rotary gas compressor is large. Moreover, although the 100 ° C. kinematic viscosity is high, the amount of lubricating oil consumption is also somewhat high. In Comparative Example 2, since the 5% by volume distillation temperature in distillation is low, the consumption amount of lubricating oil becomes excessive, and it becomes difficult to operate the rotary gas compressor for a long time.

本発明は、回転ガス圧縮機用の潤滑油として好適に利用できる。   The present invention can be suitably used as a lubricating oil for a rotary gas compressor.

Claims (6)

１００℃における動粘度が５ｍｍ２／ｓ以下、引火点が２００℃以上、および蒸留における５容量％留出温度が３５０℃以上であることを特徴とする回転ガス圧縮機用潤滑油組成物。 A lubricating oil composition for a rotary gas compressor having a kinematic viscosity at 100 ° C of 5 mm 2 / s or less, a flash point of 200 ° C or more, and a 5 vol% distillation temperature in distillation of 350 ° C or more. 請求項１に記載の回転ガス圧縮機用潤滑油組成物において、
４０℃における動粘度が２８ｍｍ２／ｓ以下であることを特徴とする回転ガス圧縮機用潤滑油組成物。 In the lubricating oil composition for a rotary gas compressor according to claim 1,
A lubricating oil composition for a rotary gas compressor, wherein the kinematic viscosity at 40 ° C. is 28 mm 2 / s or less. 請求項１または請求項２に記載の回転ガス圧縮機用潤滑油組成物において、
リン系極圧剤および酸化防止剤の少なくともいずれか一つを含有することを特徴とする回転ガス圧縮機用潤滑油組成物。 In the lubricating oil composition for a rotary gas compressor according to claim 1 or 2,
A lubricating oil composition for a rotary gas compressor, comprising at least one of a phosphorus extreme pressure agent and an antioxidant. 請求項３に記載の回転ガス圧縮機用潤滑油組成物において、
前記リン系極圧剤が正リン酸エステルおよびリン酸エステルアミン塩の少なくともいずれか一つであることを特徴とする回転ガス圧縮機用潤滑油組成物。 In the lubricating oil composition for a rotary gas compressor according to claim 3,
The lubricating oil composition for a rotary gas compressor, wherein the phosphorus extreme pressure agent is at least one of a normal phosphate ester and a phosphate ester amine salt. 請求項３または請求項４に記載の回転ガス圧縮機用潤滑油組成物において、
酸化防止剤がアミン系化合物、リン化合物、硫黄化合物およびリン・硫黄含有化合物の少なくともいずれか一つであることを特徴とする回転ガス圧縮機用潤滑油組成物。 In the lubricating oil composition for a rotary gas compressor according to claim 3 or 4,
A lubricating oil composition for a rotary gas compressor, wherein the antioxidant is at least one of an amine compound, a phosphorus compound, a sulfur compound, and a phosphorus / sulfur-containing compound. 請求項１〜請求項５のいずれかに記載の回転ガス圧縮機用潤滑油組成物を充填したことを特徴とする回転ガス圧縮機。   A rotary gas compressor, which is filled with the lubricating oil composition for a rotary gas compressor according to any one of claims 1 to 5.
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