JP2017197608A - Lubricating oil composition for agricultural machine - Google Patents

Lubricating oil composition for agricultural machine Download PDF

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JP2017197608A
JP2017197608A JP2016087297A JP2016087297A JP2017197608A JP 2017197608 A JP2017197608 A JP 2017197608A JP 2016087297 A JP2016087297 A JP 2016087297A JP 2016087297 A JP2016087297 A JP 2016087297A JP 2017197608 A JP2017197608 A JP 2017197608A
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base oil
lubricating
oil
lubricating oil
agricultural machinery
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大吾 中村
Daigo Nakamura
大吾 中村
坂本 浩一
Koichi Sakamoto
浩一 坂本
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Cosmo Oil Lubricants Co Ltd
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Cosmo Oil Lubricants Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a lubricating oil composition for an agricultural machine which holds adequate lubricity and furthermore is excellent in low temperature startability and low temperature storage stability, and does not bring about haze.SOLUTION: The lubricating oil composition for an agricultural machine is provided which contains lubricating oil base oil (A) having a kinetic viscosity at 100°C of 10-13 mm/s, a viscosity index of 90 or more and a flow point of -30°C or lower, lubricating oil base oil (B) having a kinetic viscosity at 100°C of 5-9 mm/s, a viscosity index of 120 or more and a flow point of -10°C or lower, and lubricating oil base oil (C) having a kinetic viscosity at 100°C of 2-4 mm/s, a viscosity index of 90 or more and a flow point of -35°C or lower, and in which when the total amount of the base oil content in the lubricating oil composition for agricultural machine is 100 vol.%, a volume ratio of the lubricating oil base oil (A) to the total amount of the base oil is 30 vol.% or more, the total of a volume ratio of the lubricating oil base oil (B) and a volume ratio of the lubricating oil base oil (C) is 30 vol.% or more, and kinetic viscosity at 100°C of the base oil content in the lubricating oil composition is 5.0-8.5 mm/s.SELECTED DRAWING: None

Description

本発明は、潤滑油組成物に関し、詳しくはトラクター等の農業機械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 agricultural machinery such as a tractor.

農業機械は、整地用作業機としてのトラクター、育成管理用作業機としての田植え機、収穫用作業機としてのバインダー、コンバインなどがある。これらの中で最も幅広く用いられているのがトラクターである。トラクターには油圧ポンプ部、変速装置部、PTOクラッチ部、差動歯車装置部、湿式ブレーキ部など多くの潤滑箇所があり、これらを1つの農業機械用潤滑油で潤滑しているタイプが多い。このため農業機械用潤滑油には摩擦特性、耐摩耗性、酸化安定性、さび止め性、有機材料適合性など多機能の役割が要求される。   Agricultural machines include tractors as leveling work machines, rice planting machines as growth management work machines, binders and combiners as harvesting work machines. The most widely used of these is the tractor. A tractor has many lubrication parts, such as a hydraulic pump part, a transmission part, a PTO clutch part, a differential gear device part, and a wet brake part, and these are often lubricated with a single lubricating oil for agricultural machinery. For this reason, agricultural machinery lubricants are required to have a multi-functional role such as friction characteristics, wear resistance, oxidation stability, rust resistance, and compatibility with organic materials.

また、農業機械は冬季の寒冷地においても使用されるため、農業機械に用いられる潤滑油は、粘度指数を高くすることにより、低温下の粘性抵抗を軽減し、低温始動性を向上させている(例えば、特許文献1〜4等参照)。   In addition, since agricultural machinery is also used in cold regions in winter, the lubricating oil used in agricultural machinery reduces viscosity resistance at low temperatures and improves cold startability by increasing the viscosity index. (For example, see Patent Documents 1 to 4).

国際公開第2007/001000号International Publication No. 2007/001000 特開2008−308697号公報JP 2008-308697 A 特開2006−274209号公報JP 2006-274209 A 特開2015−172165号公報JP2015-172165A

しかしながら、粘度指数を高くし低温始動性を向上させた潤滑油の中でも、低温で長期保存した際、ヘイズと呼ばれる靄状の物質が析出、沈殿することがあり、農業機械に備わっているフィルターの通過性を悪化させ、各潤滑箇所における潤滑不良や油圧作動不良となる恐れがある。   However, among the lubricating oils with a high viscosity index and improved low temperature startability, when stored at low temperatures for a long time, soot-like substances called haze may precipitate and precipitate. There is a possibility that the passability is deteriorated, resulting in poor lubrication or hydraulic operation failure at each lubrication point.

従って、本発明の目的は、適切な潤滑性を保持しつつ、低温始動性に優れ且つ低温貯蔵安定性に優れ、ヘイズの発生が無い農業機械用潤滑油組成物を提供することにある。   Accordingly, an object of the present invention is to provide a lubricating oil composition for agricultural machinery that maintains appropriate lubricity, is excellent in low-temperature startability, is excellent in low-temperature storage stability, and does not generate haze.

本発明者らは、上記課題に鑑み鋭意検討した結果、特定の潤滑油基油を特定の割合で配合することで上記課題を解決できることを見出し、この知見にもとづいて本発明を完成するに至った。   As a result of intensive studies in view of the above problems, the present inventors have found that the above problems can be solved by blending a specific lubricating base oil at a specific ratio, and the present invention has been completed based on this knowledge. It was.

すなわち、本発明(1)は、100℃での動粘度が10〜13mm/s、粘度指数が90以上、流動点が−30℃以下である潤滑油基油(A)と、
100℃での動粘度が5〜9mm/s、粘度指数が120以上、流動点が−10℃以下である潤滑油基油(B)と、
100℃での動粘度が2〜4mm/s、粘度指数が90以上、流動点が−35℃以下である潤滑油基油(C)と、
を含有し、
農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、該基油分全量に対する該潤滑油基油(A)の体積割合が30体積%以上であり、且つ、該潤滑油基油(B)の体積割合及び該潤滑油基油(C)の体積割合の合計が30体積%以上であり、
該基油分の100℃での動粘度が5.0〜8.5mm/sであること、
を特徴とする農業機械用潤滑油組成物を提供するものである。
That is, the present invention (1) includes a lubricating base oil (A) having a kinematic viscosity at 100 ° C. of 10 to 13 mm 2 / s, a viscosity index of 90 or more, and a pour point of −30 ° C. or less,
A lubricating base oil (B) having a kinematic viscosity at 100 ° C. of 5 to 9 mm 2 / s, a viscosity index of 120 or more, and a pour point of −10 ° C. or less;
A lubricating base oil (C) having a kinematic viscosity at 100 ° C. of 2 to 4 mm 2 / s, a viscosity index of 90 or more, and a pour point of −35 ° C. or less;
Containing
When the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, the volume ratio of the lubricating base oil (A) to the total amount of the base oil is 30% by volume or more, and the lubrication The sum of the volume ratio of the oil base oil (B) and the volume ratio of the lubricating base oil (C) is 30% by volume or more,
The kinematic viscosity at 100 ° C. of the base oil is 5.0 to 8.5 mm 2 / s,
A lubricating oil composition for agricultural machinery is provided.

本発明の農業機械用潤滑油組成物によれば、適切な潤滑性を保持しつつ、低温始動性に優れ且つ低温貯蔵安定性に優れ、ヘイズの発生が無い農業機械用潤滑油組成物を提供することができる。   According to the lubricating oil composition for agricultural machinery of the present invention, it is possible to provide a lubricating oil composition for agricultural machinery that is excellent in low-temperature startability, excellent in low-temperature storage stability and has no haze while maintaining appropriate lubricity. can do.

本発明の農業機械用潤滑油組成物は、100℃での動粘度が10〜13mm/s、粘度指数が90以上、流動点が−30℃以下である潤滑油基油(A)と、
100℃での動粘度が5〜9mm/s、粘度指数が120以上、流動点が−10℃以下である潤滑油基油(B)と、
100℃での動粘度が2〜4mm/s、粘度指数が90以上、流動点が−35℃以下である潤滑油基油(C)と、
を含有し、
農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、該基油分全量に対する該潤滑油基油(A)の体積割合が30体積%以上であり、且つ、該潤滑油基油(B)の体積割合及び該潤滑油基油(C)の体積割合の合計が30体積%以上であり、
該基油分の100℃での動粘度が5.0〜8.5mm/sであること、
を特徴とする農業機械用潤滑油組成物である。
The lubricating oil composition for agricultural machinery of the present invention comprises a lubricating base oil (A) having a kinematic viscosity at 100 ° C. of 10 to 13 mm 2 / s, a viscosity index of 90 or more, and a pour point of −30 ° C. or less,
A lubricating base oil (B) having a kinematic viscosity at 100 ° C. of 5 to 9 mm 2 / s, a viscosity index of 120 or more, and a pour point of −10 ° C. or less;
A lubricating base oil (C) having a kinematic viscosity at 100 ° C. of 2 to 4 mm 2 / s, a viscosity index of 90 or more, and a pour point of −35 ° C. or less;
Containing
When the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, the volume ratio of the lubricating base oil (A) to the total amount of the base oil is 30% by volume or more, and the lubrication The sum of the volume ratio of the oil base oil (B) and the volume ratio of the lubricating base oil (C) is 30% by volume or more,
The kinematic viscosity at 100 ° C. of the base oil is 5.0 to 8.5 mm 2 / s,
A lubricating oil composition for agricultural machinery.

本発明の農業機械用潤滑油組成物は、農業機械用潤滑油組成物中の基油分として、潤滑油基油(A)、(B)及び(C)を含有する。潤滑油基油(A)、(B)及び(C)としては、鉱油系潤滑油基油、合成系潤滑油基油、又はこれらの混合物が挙げられる。   The lubricating oil composition for agricultural machinery of the present invention contains lubricating base oils (A), (B) and (C) as the base oil in the lubricating oil composition for agricultural machinery. Examples of the lubricating base oil (A), (B), and (C) include a mineral lubricating base oil, a synthetic lubricating base oil, or a mixture thereof.

鉱油系潤滑油基油としては、様々な製造法により得られたものが挙げられるが、例えば、水素化精製油、触媒異性化油などに溶剤脱蝋又は水素化脱蝋などの処理を施した、高度に精製されたパラフィン系鉱油等が好ましい。また、上記以外にも様々な製造法により得られる鉱油系潤滑油基油、例えば、潤滑油基油原料をフェノール、フルフラールなどの芳香族抽出溶剤を用いた溶剤精製により得られるラフィネート、シリカ−アルミナを担体とするコバルト、モリブデンなどの水素化処理触媒を用いた水素化処理により得られる水素化処理油などが挙げられる。特に、鉱油系潤滑油基油としては、水素化分解工程や異性化工程によって得られる高粘度指数鉱油が好適なものとして挙げられる。   Mineral oil base oils include those obtained by various production methods. For example, hydrorefined oils, catalytic isomerized oils, and the like were subjected to treatment such as solvent dewaxing or hydrodewaxing. Highly refined paraffinic mineral oil and the like are preferable. In addition to the above, mineral oil base oils obtained by various production methods, for example, raffinate, silica-alumina obtained by solvent refining of lubricating base oil raw materials using aromatic extraction solvents such as phenol and furfural And hydrotreated oil obtained by hydrotreating using a hydrotreating catalyst such as cobalt or molybdenum using bismuth as a carrier. In particular, as a mineral oil-based lubricating base oil, a high viscosity index mineral oil obtained by a hydrocracking process or an isomerization process is preferable.

合成系潤滑油基油としては、例えば、メタン等のガスを原料としてフィッシャー・トロプシュ反応により合成される基油、ポリ−α−オレフィンオリゴマー、ポリブテン、アルキルベンゼン、ポリオールエステル、ポリグリコールエステル、ポリエチレンプロピレン類、ヒンダードエステル類、二塩基酸エステルなどが挙げられる。また、少量であれば、リン酸エステル、シリコーン油も、合成系潤滑油基油として用いられる。   Synthetic lubricating base oils include, for example, base oils synthesized by Fischer-Tropsch reaction using gas such as methane as raw materials, poly-α-olefin oligomers, polybutenes, alkylbenzenes, polyol esters, polyglycol esters, polyethylene propylenes , Hindered esters, dibasic acid esters and the like. Moreover, if it is a small amount, phosphate ester and silicone oil can also be used as a synthetic lubricating base oil.

そして、潤滑油基油(A)は、100℃での動粘度が10〜13mm/s、粘度指数が90以上、流動点が−30℃以下である潤滑油基油であり、潤滑油基油(B)は、100℃での動粘度が5〜9mm/s、粘度指数が120以上、流動点が−10℃以下である潤滑油基油であり、潤滑油基油(C)は、100℃での動粘度が2〜4mm/s、粘度指数が90以上、流動点が−35℃以下である潤滑油基油であり、本発明の農業機械用潤滑油基油は、その基油分を構成する潤滑油基油として、潤滑油基油(A)、(B)及び(C)を含有する。 The lubricant base oil (A) is a lubricant base oil having a kinematic viscosity at 100 ° C. of 10 to 13 mm 2 / s, a viscosity index of 90 or more, and a pour point of −30 ° C. or less. The oil (B) is a lubricating base oil having a kinematic viscosity at 100 ° C. of 5 to 9 mm 2 / s, a viscosity index of 120 or more, and a pour point of −10 ° C. or less, and the lubricating base oil (C) is , A lubricating base oil having a kinematic viscosity of 2 to 4 mm 2 / s at 100 ° C., a viscosity index of 90 or more, and a pour point of −35 ° C. or less. Lubricating base oils (A), (B), and (C) are contained as the lubricating base oil constituting the base oil.

潤滑油基油(A)の100℃での動粘度は、10〜13mm/s、好ましくは10.5〜12.5mm/s、より好ましくは11〜12mm/sである。潤滑油基油(A)の粘度指数は、90以上、好ましくは95〜120、より好ましくは100〜115である。潤滑油基油(A)の100℃動粘度及び粘度指数が上記範囲にあることにより、低温始動性に優れた農業機械用潤滑油組成物となる。また、潤滑油基油(A)の流動点は、−30℃以下、好ましくは−50〜−30℃、より好ましくは−45〜−35℃である。潤滑油基油(A)の流動点が上記範囲にあることにより、農業機械用潤滑油組成物の低温特性と製造コストのバランスが優れる。本発明の農業機械用潤滑油組成物は、基油分として、上記物性を有する潤滑油基油(A)を1種含有してもよいし、上記物性を有する潤滑油基油(A)を2種以上含有してもよい。 Kinematic viscosity at 100 ° C. of the lubricating base oil (A) is, 10~13mm 2 / s, preferably 10.5~12.5mm 2 / s, more preferably 11~12mm 2 / s. The viscosity index of the lubricating base oil (A) is 90 or more, preferably 95 to 120, more preferably 100 to 115. When the 100 ° C. kinematic viscosity and the viscosity index of the lubricating base oil (A) are in the above ranges, the lubricating oil composition for agricultural machinery having excellent low-temperature startability is obtained. The pour point of the lubricating base oil (A) is −30 ° C. or lower, preferably −50 to −30 ° C., more preferably −45 to −35 ° C. When the pour point of the lubricating base oil (A) is in the above range, the balance between the low temperature characteristics and the production cost of the lubricating oil composition for agricultural machinery is excellent. The lubricating oil composition for agricultural machinery of the present invention may contain one lubricating oil base oil (A) having the above physical properties as a base oil component, or 2 lubricating oil base oils (A) having the above physical properties. You may contain more than a seed.

潤滑油基油(B)の100℃での動粘度は、5〜9mm/s、好ましくは5.5〜8.5mm/s、より好ましくは6〜8mm/sである。また、潤滑油基油(B)の粘度指数は、120以上、好ましくは123〜150、より好ましくは125〜140である。潤滑油基油(B)の100℃動粘度及び粘度指数が上記範囲にあることにより、低温始動性に優れた農業機械用潤滑油組成物となる。また、潤滑油基油(B)の流動点は、−10℃以下、好ましくは−40〜−10℃、より好ましくは−30〜−10℃である。潤滑油基油(B)の流動点が上記範囲にあることにより、農業機械用潤滑油組成物の低温特性と製造コストのバランスが優れる。本発明の農業機械用潤滑油組成物は、基油分として、上記物性を有する潤滑油基油(B)を1種含有してもよいし、上記物性を有する潤滑油基油(B)を2種以上含有してもよい。 The kinematic viscosity at 100 ° C. of the lubricating base oil (B) is 5 to 9 mm 2 / s, preferably 5.5 to 8.5 mm 2 / s, more preferably 6 to 8 mm 2 / s. The viscosity index of the lubricating base oil (B) is 120 or more, preferably 123 to 150, more preferably 125 to 140. When the 100 ° C. kinematic viscosity and the viscosity index of the lubricating base oil (B) are in the above ranges, a lubricating oil composition for agricultural machinery having excellent low-temperature startability is obtained. Further, the pour point of the lubricating base oil (B) is −10 ° C. or lower, preferably −40 to −10 ° C., more preferably −30 to −10 ° C. When the pour point of the lubricating base oil (B) is in the above range, the balance between the low temperature characteristics and the production cost of the lubricating oil composition for agricultural machinery is excellent. The lubricating oil composition for agricultural machinery of the present invention may contain one type of lubricating base oil (B) having the above physical properties as the base oil, or 2 lubricating base oils (B) having the above physical properties. You may contain more than a seed.

潤滑油基油(C)の100℃での動粘度は、2〜4mm/s、好ましくは2.3〜3.7mm/s、より好ましくは2.6〜3.4mm/sである。また、潤滑油基油(C)の粘度指数は、90以上、好ましくは90〜120、より好ましくは90〜110である。潤滑油基油(C)の100℃動粘度及び粘度指数が上記範囲にあることにより、低温始動性に優れた農業機械用潤滑油組成物となる。また、潤滑油基油(C)の流動点は、−35℃以下、好ましくは−50〜−35℃、より好ましくは−45〜−35℃である。潤滑油基油(C)の流動点が上記範囲にあることにより、農業機械用潤滑油組成物の低温特性と製造コストのバランスが優れる。本発明の農業機械用潤滑油組成物は、基油分として、上記物性を有する潤滑油基油(C)を1種含有してもよいし、上記物性を有する潤滑油基油(C)を2種以上含有してもよい。 The kinematic viscosity at 100 ° C. of the lubricating base oil (C) is 2 to 4 mm 2 / s, preferably 2.3 to 3.7 mm 2 / s, more preferably 2.6 to 3.4 mm 2 / s. is there. The viscosity index of the lubricating base oil (C) is 90 or more, preferably 90 to 120, more preferably 90 to 110. When the 100 ° C. kinematic viscosity and the viscosity index of the lubricating base oil (C) are in the above ranges, a lubricating oil composition for agricultural machinery having excellent low-temperature startability is obtained. The pour point of the lubricating base oil (C) is −35 ° C. or lower, preferably −50 to −35 ° C., more preferably −45 to −35 ° C. When the pour point of the lubricating base oil (C) is in the above range, the balance between the low temperature characteristics and the production cost of the lubricating oil composition for agricultural machinery is excellent. The lubricating oil composition for agricultural machinery of the present invention may contain one type of lubricating base oil (C) having the above physical properties as a base oil component, or 2 lubricating base oils (C) having the above physical properties. You may contain more than a seed.

本発明の農業機械用潤滑油組成物において、農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、基油分中に占める潤滑油基油(A)の体積割合、すなわち、基油分全量に対する潤滑油基油(A)の体積割合は、30体積%以上、好ましくは30〜70体積%、より好ましくは40〜68体積%、最も好ましくは50〜65体積%である。   In the lubricating oil composition for agricultural machinery of the present invention, when the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, the volume ratio of the lubricating base oil (A) in the base oil, That is, the volume ratio of the lubricating base oil (A) to the total amount of the base oil is 30% by volume or more, preferably 30 to 70% by volume, more preferably 40 to 68% by volume, and most preferably 50 to 65% by volume. .

また、本発明の農業機械用潤滑油組成物において、農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、基油分中に占める潤滑油基油(B)及び潤滑油基油(C)の合計の体積割合、すなわち、基油分全量に対する潤滑油基油(B)の体積割合及び潤滑油基油(C)の体積割合の合計は、30体積%以上、好ましくは30〜70体積%、より好ましくは32〜60体積%、最も好ましくは35〜50体積%である。   Further, in the lubricating oil composition for agricultural machinery of the present invention, when the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, the lubricating base oil (B) and the lubricating oil occupied in the base oil The total volume ratio of the oil base oil (C), that is, the sum of the volume ratio of the lubricant base oil (B) and the volume ratio of the lubricant base oil (C) to the total amount of the base oil is 30% by volume or more, preferably 30 to 70% by volume, more preferably 32 to 60% by volume, and most preferably 35 to 50% by volume.

そして、本発明の農業機械用潤滑油組成物は、上記100℃動粘度、粘度指数及び流動点を有する潤滑油基油(A)、(B)及び(C)を含有し、農業機械用潤滑油組成物中の基油分全量を100体積%としたときに、基油分中に占める潤滑油基油(A)の体積割合を上記範囲、且つ、基油分中に占める潤滑油基油(B)及び潤滑油基油(C)の合計の体積割合を上記範囲とすることにより、潤滑性を保持しながら低温始動性に優れ、且つ、低温貯蔵安定性に優れ、ヘイズの発生が無い農業機械用潤滑油組成物となる。   And the lubricating oil composition for agricultural machinery of the present invention contains the lubricating base oils (A), (B) and (C) having the 100 ° C. kinematic viscosity, viscosity index and pour point, and lubricating for agricultural machinery. When the total amount of the base oil in the oil composition is 100% by volume, the volume ratio of the lubricating base oil (A) in the base oil is within the above range, and the lubricating base oil (B) in the base oil In addition, by making the total volume ratio of the lubricating base oil (C) within the above range, it is excellent in low temperature startability while maintaining lubricity, excellent in low temperature storage stability, and free of haze. A lubricating oil composition is obtained.

なお、本発明の農業機械用潤滑油組成物の基油分が、上記物性を有する潤滑油基油(A)を2種以上混合して構成されたものである場合、上記基油分中に占める潤滑油基油(A)の体積割合は、農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、基油分中に占めるそれら2種以上の潤滑油基油(A)の合計の体積割合を指す。また、本発明の農業機械用潤滑油組成物の基油分が、上記物性を有する潤滑油基油(B)を2種以上混合して構成されたものである場合、上記基油分中に占める潤滑油基油(B)の体積割合は、農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、基油分中に占めるそれら2種以上の潤滑油基油(B)の合計の体積割合を指す。また、本発明の農業機械用潤滑油組成物の基油分が、上記物性を有する潤滑油基油(C)を2種以上混合して構成されたものである場合、上記基油分中に占める潤滑油基油(C)の体積割合は、農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、基油分中に占めるそれら2種以上の潤滑油基油(C)の合計の体積割合を指す。   In addition, when the base oil content of the lubricating oil composition for agricultural machinery of the present invention is constituted by mixing two or more types of lubricating oil base oils (A) having the above physical properties, the lubrication occupied in the base oil content The volume ratio of the oil base oil (A) is such that when the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, those two or more lubricant base oils (A) in the base oil Refers to the total volume ratio. Further, in the case where the base oil content of the lubricating oil composition for agricultural machinery of the present invention is composed of a mixture of two or more types of the lubricating base oil (B) having the above physical properties, the lubrication occupied in the base oil content The volume ratio of the oil base oil (B) is such that when the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, those two or more lubricant base oils (B) in the base oil Refers to the total volume ratio. In addition, when the base oil content of the lubricating oil composition for agricultural machinery of the present invention is composed of a mixture of two or more types of lubricating base oils (C) having the above physical properties, the lubrication occupied in the base oil content The volume ratio of the oil base oil (C) is such that when the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, those two or more types of the lubricant base oil (C) in the base oil Refers to the total volume ratio.

本発明の農業機械用潤滑油組成物は、潤滑油基油(A)、(B)及び(C)以外の潤滑油基油として、鉱油系潤滑油基油、合成系潤滑油基油、又はこれらの混合物であって、100℃動粘度、粘度指数及び流動点において、上記潤滑油基油(A)、(B)及び(C)のいずれにも該当しない潤滑油基油を、本発明の効果を損なわない範囲で含有することができる。本発明の農業機械用潤滑油組成物が、潤滑油基油(A)、(B)及び(C)以外の潤滑油基油を含有する場合、農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、基油分中に占める潤滑油基油(A)、(B)及び(C)以外の潤滑油基油の体積割合、すなわち、基油分全量に対する潤滑油基油(A)、(B)及び(C)以外の潤滑油基油の体積割合は、40体積%以下、好ましくは0〜20体積%、より好ましくは0〜5体積%である。   The lubricating oil composition for agricultural machinery of the present invention is a lubricating base oil other than the lubricating base oil (A), (B) and (C), a mineral lubricating base oil, a synthetic lubricating base oil, or A lubricant base oil that is a mixture of these and does not fall under any of the above-mentioned lubricant base oils (A), (B), and (C) in terms of 100 ° C. kinematic viscosity, viscosity index, and pour point. It can contain in the range which does not impair an effect. When the lubricating oil composition for agricultural machinery of the present invention contains a lubricating base oil other than the lubricating base oil (A), (B) and (C), the base oil content in the lubricating oil composition for agricultural machinery Lubricating base oil other than the lubricating base oil (A), (B) and (C) in the base oil when the total amount is 100% by volume, that is, the lubricating base oil relative to the total base oil The volume ratio of the lubricating base oil other than (A), (B) and (C) is 40% by volume or less, preferably 0 to 20% by volume, more preferably 0 to 5% by volume.

本発明の農業機械用潤滑油組成物中の基油分の100℃動粘度(基油分を構成する全潤滑油基油の混合粘度)は、5.0〜8.5mm/s、好ましくは5.5〜8.3mm/s、より好ましくは6.0〜8.0mm/s、最も好ましくは6.5〜7.8mm/sである。本発明の農業機械用潤滑油組成物中の基油分の100℃動粘度が上記範囲内にあることにより、潤滑性を保持しながら低温始動性に優れる農業機械用潤滑油組成物となる。 The 100 ° C. kinematic viscosity of the base oil in the lubricating oil composition for agricultural machinery of the present invention (mixed viscosity of all lubricating base oils constituting the base oil) is 5.0 to 8.5 mm 2 / s, preferably 5 It is from 0.5 to 8.3 mm 2 / s, more preferably from 6.0 to 8.0 mm 2 / s, and most preferably from 6.5 to 7.8 mm 2 / s. When the 100 ° C. kinematic viscosity of the base oil in the lubricating oil composition for agricultural machinery of the present invention is within the above range, the lubricating oil composition for agricultural machinery having excellent low-temperature startability while maintaining lubricity is obtained.

本発明の農業機械用潤滑油組成物は、ポリメタアクリレート系添加剤を含有することができる。ポリメタアクリレート系添加剤の重量平均分子量は10万〜50万、好ましくは10万〜30万、より好ましくは10万〜25万である。ポリメタアクリレート系添加剤の重量平均分子量が上記範囲内にあることにより、低温始動性及びせん断安定性に優れる農業機械用潤滑油組成物となる。   The lubricating oil composition for agricultural machinery of the present invention can contain a polymethacrylate-based additive. The weight average molecular weight of the polymethacrylate-based additive is 100,000 to 500,000, preferably 100,000 to 300,000, more preferably 100,000 to 250,000. When the weight average molecular weight of the polymethacrylate-based additive is within the above range, a lubricating oil composition for agricultural machinery having excellent low-temperature startability and shear stability is obtained.

本発明の農業機械用潤滑油組成物中のポリメタアクリレート系添加剤の含有量は、農業機械用潤滑油組成物全量に対し、1.0〜5.0質量%、好ましくは1.0〜4.5質量%、より好ましくは1.0〜4.0質量%である。農業機械用潤滑油組成物中のポリメタアクリレート系添加剤の含有量が上記範囲内にあることにより、せん断安定性に優れる農業機械用潤滑油組成物となる。なお、ポリメタアクリレート系添加剤には、潤滑油基油等の希釈剤に溶解された状態で市販されているものもあるが、ポリメタアクリレート系添加剤が希釈剤に溶解されている場合には、上記ポリメタアクリレート系添加剤の含有量は、希釈剤を除いた、ポリマー分の含有量を指す。   The content of the polymethacrylate-based additive in the agricultural machine lubricating oil composition of the present invention is 1.0 to 5.0% by mass, preferably 1.0 to 5.0%, based on the total amount of the agricultural machine lubricating oil composition. It is 4.5 mass%, More preferably, it is 1.0-4.0 mass%. When the content of the polymethacrylate-based additive in the lubricating oil composition for agricultural machinery is within the above range, the lubricating oil composition for agricultural machinery having excellent shear stability is obtained. Some polymethacrylate additives are commercially available in a state of being dissolved in a diluent such as a lubricant base oil, but when the polymethacrylate additive is dissolved in a diluent. The content of the polymethacrylate-based additive indicates the content of the polymer component excluding the diluent.

本発明の農業機械用潤滑油組成物は、必要に応じて、公知の添加剤、例えば、摩擦調整剤、油性剤、ZnDTP以外の摩耗防止剤、極圧剤、さび止め剤、酸化防止剤、金属不活性化剤、流動点降下剤、消泡剤、着色剤、トラクター作動油用パッケージ添加剤、あるいはこれらのうち少なくとも1種を含有する各種潤滑油用パッケージ添加剤などを含有することができる。   The lubricating oil composition for agricultural machinery of the present invention, if necessary, known additives such as friction modifiers, oily agents, antiwear agents other than ZnDTP, extreme pressure agents, rust inhibitors, antioxidants, Metal deactivator, pour point depressant, antifoaming agent, colorant, package additive for tractor hydraulic oil, or various lubricant package additives containing at least one of these can be contained. .

摩擦調整剤としては、有機モリブテン化合物、多価アルコール部分エステル系、アミン系、アミド系、エーテル系、硫化エステル、リン酸エステル、酸性リン酸エステルやそのアミン塩、ジオール類などが挙げられる。また、油性剤としては、オレイン酸、ステアリン酸、高級アルコール、アミン、エステル、硫化油脂、酸性リン酸エステル、酸性亜リン酸エステルなどが挙げられる。また、無灰型分散剤としてはポリアルケニルコハク酸イミド、ホウ素系イミドなどが挙げられる。また、摩耗防止剤としては、硫黄化合物、リン酸エステル、亜リン酸エステル、酸性リン酸エステルやそのアミン塩などが挙げられる。また、極圧剤としては、炭化水素硫化物、硫化油脂、リン酸エステル、亜リン酸エステル、塩素化パラフィン、塩素化ジフェニルなどが挙げられる。また、さび止め剤としては、カルボン酸やそのアミン塩、エステル、スルホン酸塩、ホウ素化合物などが挙げられる。また、酸化防止剤としては、アミン系、フェノール系、硫黄系の酸化防止剤などが挙げられる。また、金属不活性化剤としては、ベンゾトリアゾール、チアジアゾール、アルケニルコハク酸エステルなどが挙げられる。また、流動点降下剤としては、ポリアルキルメタクリレート系、塩素化パラフィン−ナフタレン縮合物、アルキル化ポリスチレンなどが挙げられる。また、消泡剤としては、ジメチルポリシロキサンなどのシリコーン化合物、フルオロシリコン化合物、エステル系などが挙げられる。   Examples of the friction modifier include organic molybdenum compounds, polyhydric alcohol partial esters, amines, amides, ethers, sulfide esters, phosphate esters, acidic phosphate esters and amine salts thereof, diols, and the like. Examples of the oily agent include oleic acid, stearic acid, higher alcohols, amines, esters, sulfurized fats and oils, acidic phosphate esters, and acidic phosphite esters. Examples of the ashless dispersant include polyalkenyl succinimides and boron imides. Examples of the antiwear agent include sulfur compounds, phosphate esters, phosphite esters, acidic phosphate esters and amine salts thereof. Examples of extreme pressure agents include hydrocarbon sulfides, sulfurized fats and oils, phosphate esters, phosphite esters, chlorinated paraffins, and chlorinated diphenyls. Examples of the rust inhibitor include carboxylic acids and their amine salts, esters, sulfonates, and boron compounds. Examples of the antioxidant include amine-based, phenol-based, and sulfur-based antioxidants. Examples of the metal deactivator include benzotriazole, thiadiazole, and alkenyl succinate. Examples of the pour point depressant include polyalkyl methacrylate, chlorinated paraffin-naphthalene condensate, and alkylated polystyrene. Examples of the antifoaming agent include silicone compounds such as dimethylpolysiloxane, fluorosilicone compounds, and ester-based compounds.

本発明の農業機械用潤滑油組成物の100℃での動粘度が9.3mm/s以上であり、且つ、本発明の農業機械用潤滑油組成物の−25℃でのCCS粘度が7,000mPa・s以下であることが好ましい。本発明の農業機械用潤滑油組成物の100℃での動粘度が9.3mm/s以上であり、且つ、本発明の農業機械用潤滑油組成物の−25℃でのCCS粘度が7,000mPa・s以下であることにより、潤滑性を保持し且つ低温始動性にも優れるという効果が高まる。 The kinematic viscosity at 100 ° C. of the lubricating oil composition for agricultural machinery of the present invention is 9.3 mm 2 / s or more, and the CCS viscosity at −25 ° C. of the lubricating oil composition for agricultural machinery of the present invention is 7 1,000 mPa · s or less is preferable. The kinematic viscosity at 100 ° C. of the lubricating oil composition for agricultural machinery of the present invention is 9.3 mm 2 / s or more, and the CCS viscosity at −25 ° C. of the lubricating oil composition for agricultural machinery of the present invention is 7 When the viscosity is 1,000 mPa · s or less, the effect of maintaining lubricity and excellent low temperature startability is enhanced.

本発明の農業機械用潤滑油組成物の調製方法としては、特に制限されず、所定量の潤滑油基油(A)、(B)及び(C)、更に必要に応じて、潤滑油基油(A)、(B)及び(C)以外の潤滑油基油、各種添加剤を適宜混合して、本発明の農業機械用潤滑油組成物を調製すればよい。それらの混合順序は特に制限されるものではなく、潤滑油基油(A)、(B)及び(C)、更に必要に応じて、潤滑油基油(A)、(B)及び(C)以外の潤滑油基油、各種添加剤を順次混合してもよいし、あるいは、各種添加剤に、潤滑油基油(A)、(B)及び(C)、更に必要に応じて、潤滑油基油(A)、(B)及び(C)以外の潤滑油基油を順次混合してもよいし、あるいは、予め各種添加剤を潤滑油基油(A)、(B)及び(C)のいずれかに予め添加しておいて、潤滑油基油(A)、(B)及び(C)、更に必要に応じて、潤滑油基油(A)、(B)及び(C)以外の潤滑油基油、各種添加剤を混合してもよい。   The method for preparing the lubricating oil composition for agricultural machinery of the present invention is not particularly limited, and a predetermined amount of the lubricating base oil (A), (B) and (C), and further, if necessary, the lubricating base oil. A lubricating oil composition for agricultural machinery of the present invention may be prepared by appropriately mixing lubricating base oils other than (A), (B) and (C) and various additives. The mixing order is not particularly limited, and the lubricant base oils (A), (B) and (C), and further, if necessary, the lubricant base oils (A), (B) and (C). Other lubricant base oils and various additives may be mixed sequentially, or various additives may be mixed with the lubricant base oils (A), (B) and (C), and if necessary, the lubricant oil Lubricating base oils other than the base oils (A), (B) and (C) may be sequentially mixed, or various additives may be mixed in advance with the lubricating base oils (A), (B) and (C). In addition to the lubricant base oils (A), (B) and (C), and if necessary, other than the lubricant base oils (A), (B) and (C) Lubricating base oil and various additives may be mixed.

本発明の農業機械用潤滑油組成物は、農業機械として、整地用作業機のトラクター、育成管理用作業機の田植え機、収穫用作業機のバインダー、コンバインなどの潤滑油として用いられ、特に、トラクターの潤滑油として好適に用いられる。本発明の農業機械用潤滑油組成物は、農業機械の油圧ポンプ部、変速装置部、PTOクラッチ部、差動歯車装置部、湿式ブレーキ部などの共用潤滑油として用いられる。   The lubricating oil composition for agricultural machinery of the present invention is used as a lubricating oil for agricultural machinery, such as a tractor for leveling work, a rice planting machine for cultivation management work, a binder for harvesting work machines, and a combine, It is suitably used as a lubricating oil for tractors. The lubricating oil composition for agricultural machinery of the present invention is used as a common lubricating oil for agricultural machinery hydraulic pumps, transmissions, PTO clutches, differential gears, wet brakes, and the like.

次に、実施例を挙げて本発明を具体的に説明するが、これは単に例示であって、本発明を制限するものではない。   Next, the present invention will be specifically described by way of examples, but this is merely an example and does not limit the present invention.

(実施例1〜4、比較例1〜12)
表2〜表4に示す配合量で、潤滑油基油と各添加剤を配合して、農業機械用潤滑油基油を調製し、それぞれの性能を評価した。その結果を表2〜表4に示す。なお、実施例及び比較例において用いた潤滑油基油を表1に示す。
(Examples 1-4, Comparative Examples 1-12)
Lubricating oil base oil and each additive were mix | blended with the compounding quantity shown in Table 2-Table 4, the lubricating oil base oil for agricultural machines was prepared, and each performance was evaluated. The results are shown in Tables 2-4. The lubricating base oils used in the examples and comparative examples are shown in Table 1.

また、添加剤の成分は次の通りである。
(トラクター作動油パッケージ)
トラクター作動油パッケージ中の元素は、Ca:6.1質量%、Zn:2.5質量%、P:1.5質量%、B:0.2質量%、N:0.1質量%である。トラクター作動油パッケージ中には、カルシウム系清浄剤、コハク酸イミド、ジアルキルジチオリン酸亜鉛、フェノール系酸化防止剤、消泡剤などの各種添加剤が含まれている。
(粘度指数向上剤)
重量平均分子量が20万のポリアルキルメタクリレート。
(その他添加剤)
流動点降下剤、シリコーン系消泡剤を含む。
The components of the additive are as follows.
(Tractor hydraulic oil package)
The elements in the tractor hydraulic oil package are Ca: 6.1% by mass, Zn: 2.5% by mass, P: 1.5% by mass, B: 0.2% by mass, and N: 0.1% by mass. . The tractor hydraulic oil package contains various additives such as calcium detergent, succinimide, zinc dialkyldithiophosphate, phenolic antioxidant and antifoaming agent.
(Viscosity index improver)
Polyalkylmethacrylate having a weight average molecular weight of 200,000.
(Other additives)
Contains pour point depressant and silicone antifoam.

<性能評価方法>
評価試験法は次のとおりである。
(粘度温度特性)
JIS K 2283に準拠し、40℃及び100℃での動粘度を測定し、粘度指数を算出した。
(低温粘度特性)
ASTM D5293に準拠し、−25℃でのCCS粘度を測定した。
(低温貯蔵安定性)
温度を−5℃に設定した恒温槽内に20日間静置し、ヘイズの発生有無を目視判定した。
<Performance evaluation method>
The evaluation test method is as follows.
(Viscosity temperature characteristics)
Based on JIS K 2283, the kinematic viscosity at 40 ° C. and 100 ° C. was measured, and the viscosity index was calculated.
(Low temperature viscosity characteristics)
Based on ASTM D5293, the CCS viscosity at −25 ° C. was measured.
(Low temperature storage stability)
It left still for 20 days in the thermostat which set temperature to -5 degreeC, and the presence or absence of generation | occurrence | production of haze was determined visually.

低温粘度特性について、実施例1〜4は、潤滑油基油(A)を30体積%以上含有し、且つ、潤滑油基油(B)及び(C)を合計で30体積%以上含有することにより、いずれも100℃での動粘度が9.3mm/s以上でありながら−25℃でのCCS粘度が7,000mPa・s以下であり、潤滑性を保持しながら低温始動性に優れていることが分かる。
一方、比較例1〜8は、潤滑油基油(A)を30体積%以上含有していない、又は潤滑油基油(B)及び(C)を合計で体積30%以上を含有していないため、−25℃でのCCS粘度が高い値を示しており、いずれも低温始動性に劣っていることが分かる。
Regarding the low-temperature viscosity characteristics, Examples 1 to 4 contain 30% by volume or more of the lubricating base oil (A) and 30% by volume or more of the lubricating base oils (B) and (C). As a result, the kinematic viscosity at 100 ° C. is 9.3 mm 2 / s or more, but the CCS viscosity at −25 ° C. is 7,000 mPa · s or less, and it has excellent low temperature startability while maintaining lubricity. I understand that.
On the other hand, Comparative Examples 1-8 do not contain 30% by volume or more of the lubricating base oil (A), or do not contain 30% or more of the total volume of the lubricating base oils (B) and (C). Therefore, the CCS viscosity at −25 ° C. shows a high value, and it can be seen that both are inferior in cold startability.

また、低温貯蔵安定性については、実施例1は、潤滑油基油(A)を30体積%以上含有し、且つ、潤滑油基油(B)及び(C)を合計で30体積%以上含有することにより、低温での長期保存におけるヘイズの発生が確認されず、良好な低温貯蔵安定性を示していることが分かる。
一方、比較例9〜12は、潤滑油基油(B)及び(C)を合計で30体積%以上含有し、且つ、粘度指数が実施例1に比べ高くなっているものの、潤滑油基油(A)を30体積%以上含有していないため、低温での長期保存においてヘイズの発生が見られ、低温貯蔵安定性に劣っていることが分かる。
Moreover, about low temperature storage stability, Example 1 contains 30 volume% or more of lubricating base oil (A), and contains 30 volume% or more of lubricating base oils (B) and (C) in total. By doing this, it can be seen that the generation of haze during long-term storage at low temperatures was not confirmed, indicating good low-temperature storage stability.
On the other hand, Comparative Examples 9 to 12 contain the lubricating base oil (B) and (C) in a total amount of 30% by volume or more, and the viscosity index is higher than that of Example 1, but the lubricating base oil. Since (A) is not contained in an amount of 30% by volume or more, it can be seen that generation of haze is observed during long-term storage at low temperatures, and the low-temperature storage stability is poor.

Claims (4)

100℃での動粘度が10〜13mm/s、粘度指数が90以上、流動点が−30℃以下である潤滑油基油(A)と、
100℃での動粘度が5〜9mm/s、粘度指数が120以上、流動点が−10℃以下である潤滑油基油(B)と、
100℃での動粘度が2〜4mm/s、粘度指数が90以上、流動点が−35℃以下である潤滑油基油(C)と、
を含有し、
農業機械用潤滑油組成物中の基油分の全量を100体積%としたときに、該基油分全量に対する該潤滑油基油(A)の体積割合が30体積%以上であり、且つ、該潤滑油基油(B)の体積割合及び該潤滑油基油(C)の体積割合の合計が30体積%以上であり、
該基油分の100℃での動粘度が5.0〜8.5mm/sであること、
を特徴とする農業機械用潤滑油組成物。
A lubricating base oil (A) having a kinematic viscosity at 100 ° C. of 10 to 13 mm 2 / s, a viscosity index of 90 or more, and a pour point of −30 ° C. or less;
A lubricating base oil (B) having a kinematic viscosity at 100 ° C. of 5 to 9 mm 2 / s, a viscosity index of 120 or more, and a pour point of −10 ° C. or less;
A lubricating base oil (C) having a kinematic viscosity at 100 ° C. of 2 to 4 mm 2 / s, a viscosity index of 90 or more, and a pour point of −35 ° C. or less;
Containing
When the total amount of the base oil in the lubricating oil composition for agricultural machinery is 100% by volume, the volume ratio of the lubricating base oil (A) to the total amount of the base oil is 30% by volume or more, and the lubrication The sum of the volume ratio of the oil base oil (B) and the volume ratio of the lubricating base oil (C) is 30% by volume or more,
The kinematic viscosity at 100 ° C. of the base oil is 5.0 to 8.5 mm 2 / s,
A lubricating oil composition for agricultural machinery.
ポリメタクリレート系添加剤を含有することを特徴とする請求項1記載の農業機械用潤滑油組成物。   The lubricating oil composition for agricultural machinery according to claim 1, further comprising a polymethacrylate-based additive. 前記ポリメタアクリレート系添加剤の重量平均分子量が10万〜50万であり、該ポリメタアクリレート系添加剤の含有量が、農業機械用潤滑油組成物の全量基準で、1.0〜5.0質量%であることを特徴とする請求項2記載の農業機械用潤滑油組成物。   The polymethacrylate-based additive has a weight average molecular weight of 100,000 to 500,000, and the content of the polymethacrylate-based additive is 1.0 to 5.5 based on the total amount of the lubricating oil composition for agricultural machinery. The lubricating oil composition for agricultural machinery according to claim 2, wherein the composition is 0% by mass. 100℃での動粘度が9.3mm/s以上であり、且つ、−25℃におけるCCS粘度が7,000mPa・s以下であることを特徴とする請求項1〜3いずれか1項記載の農業機械用潤滑油組成物。 The kinematic viscosity at 100 ° C is not less than 9.3 mm 2 / s, and the CCS viscosity at -25 ° C is not more than 7,000 mPa · s. A lubricating oil composition for agricultural machinery.
JP2016087297A 2016-04-25 2016-04-25 Lubricating oil composition for agricultural machine Pending JP2017197608A (en)

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JP2004515601A (en) * 2000-12-05 2004-05-27 シェブロン ユー.エス.エー. インコーポレイテッド Method for preparing lubricant having high viscosity index value
JP2006274209A (en) * 2005-03-30 2006-10-12 Nippon Oil Corp Lubricating oil composition
WO2007001000A1 (en) * 2005-06-29 2007-01-04 Nippon Oil Corporation Base oil for hydraulic oil and hydraulic oil compositions
JP2013532163A (en) * 2010-07-06 2013-08-15 ビーエーエスエフ ソシエタス・ヨーロピア Acid-free quaternized nitrogen compounds and their use as additives in fuels and lubricants

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004515601A (en) * 2000-12-05 2004-05-27 シェブロン ユー.エス.エー. インコーポレイテッド Method for preparing lubricant having high viscosity index value
JP2004067957A (en) * 2002-08-09 2004-03-04 Matsushita Electric Ind Co Ltd Lubricating oil for bearing and motor using it
JP2006274209A (en) * 2005-03-30 2006-10-12 Nippon Oil Corp Lubricating oil composition
WO2007001000A1 (en) * 2005-06-29 2007-01-04 Nippon Oil Corporation Base oil for hydraulic oil and hydraulic oil compositions
JP2008308697A (en) * 2005-06-29 2008-12-25 Nippon Oil Corp Base oil for hydraulic oil, and composition therefor
JP2013532163A (en) * 2010-07-06 2013-08-15 ビーエーエスエフ ソシエタス・ヨーロピア Acid-free quaternized nitrogen compounds and their use as additives in fuels and lubricants

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