JP2814131B2 - Engine oil composition for alcohol fuel - Google Patents

Engine oil composition for alcohol fuel

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Publication number
JP2814131B2
JP2814131B2 JP2063741A JP6374190A JP2814131B2 JP 2814131 B2 JP2814131 B2 JP 2814131B2 JP 2063741 A JP2063741 A JP 2063741A JP 6374190 A JP6374190 A JP 6374190A JP 2814131 B2 JP2814131 B2 JP 2814131B2
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JP
Japan
Prior art keywords
oil
alkaline earth
earth metal
engine oil
alcohol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2063741A
Other languages
Japanese (ja)
Other versions
JPH03263496A (en
Inventor
清 井上
享士 三藤
昌邦 平田
Original Assignee
日本石油株式会社
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13238139&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2814131(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 日本石油株式会社 filed Critical 日本石油株式会社
Priority to JP2063741A priority Critical patent/JP2814131B2/en
Priority to DE69105788T priority patent/DE69105788T2/en
Priority to EP91103710A priority patent/EP0447915B1/en
Publication of JPH03263496A publication Critical patent/JPH03263496A/en
Priority to US08/277,160 priority patent/US5739088A/en
Application granted granted Critical
Publication of JP2814131B2 publication Critical patent/JP2814131B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C10M2223/065—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds containing sulfur
    • 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/061—Esters derived from boron
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/02—Unspecified siloxanes; Silicones
    • 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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/12—Groups 6 or 16
    • 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
    • C10N2040/25—Internal-combustion engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/251—Alcohol fueled engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • 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
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • C10N2040/28—Rotary engines

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はメタノールまたはエタノールなどのようなア
ルコール系燃料を燃焼させるエンジン油の潤滑油組成物
に関する。Description: TECHNICAL FIELD The present invention relates to a lubricating oil composition for an engine oil that burns an alcohol-based fuel such as methanol or ethanol.

［従来技術］ アルコール燃料を燃焼させるエンジン例えばメタノー
ルエンジンでは、ギ酸のようなアルコールの酸化物や水
が発生し易い。これらは、ブローバイガスとしてクラン
クケース内に混入し、腐食や錆が発生し易い。またこれ
らの極性物質はエンジン各部の摩耗の原因になる。した
がってエンジン油内に混入するギ酸を速やかに中和し、
不活性化する必要がある。この目的のために、従来のエ
ンジン油には炭酸カルシウムで過塩基化した清浄剤が使
用されている。しかし従来の過塩基性清浄剤ではギ酸の
中和性能が不充分であり、また、従来の過塩基性清浄剤
は使用中に粗粒化する傾向があり、問題があった。さら
に、耐摩耗性も不充分であった。[Related Art] In an engine burning alcohol fuel, for example, a methanol engine, oxides of alcohol such as formic acid and water are easily generated. These are mixed into the crankcase as blow-by gas, and corrosion and rust easily occur. In addition, these polar substances cause wear of various parts of the engine. Therefore, it quickly neutralizes formic acid mixed in the engine oil,
Need to be deactivated. To this end, conventional engine oils use detergents that are overbased with calcium carbonate. However, the conventional overbased detergents have insufficient formic acid neutralization performance, and the conventional overbased detergents have a problem that they tend to coarsen during use. Further, the abrasion resistance was insufficient.

［発明が解決しようとする課題］ そこで本発明者等はこれらの問題を解決するため研究
を重ねた結果、アルカリ土類金属ホウ酸塩が優れた効果
を有することを見いだし、本発明を完成するに至った。[Problems to be Solved by the Invention] The inventors of the present invention have conducted various studies to solve these problems, and as a result, have found that alkaline earth metal borates have excellent effects, thereby completing the present invention. Reached.

本発明は、従来の過塩基性清浄剤に比較して優れたギ
酸の中和性能および耐摩耗性を有し、かつ、使用中に粗
粒化する傾向のない過塩基性清浄剤を含有するアルコー
ル系燃料用エンジン油組成物を提供することを目的とす
る。The present invention contains an overbased detergent that has superior formic acid neutralization performance and abrasion resistance compared to conventional overbased detergents, and that does not tend to coarsen during use. An object of the present invention is to provide an engine oil composition for an alcohol-based fuel.

［課題を解決するための手段］ すなわち、本発明は、潤滑油基油に、必須成分とし
て、アルカリ土類金属ホウ酸塩を組成物全量基準で0.01
〜10重量％含有せしめたことを特徴とするアルコール系
燃料用エンジン油組成物を提供するものである。[Means for Solving the Problems] That is, the present invention relates to a lubricating base oil containing an alkaline earth metal borate as an essential component in an amount of 0.01
An object of the present invention is to provide an engine oil composition for an alcohol-based fuel, characterized in that the composition contains about 10% by weight.

以下、本発明の内容を詳細に説明する。 Hereinafter, the contents of the present invention will be described in detail.

本発明における潤滑油基油としては、特に限定される
ものではなく、通常、エンジン油の基油として用いられ
ているものであれば、鉱油、合成油を問わず使用でき
る。鉱油とては、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、白土処理等の精製処理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使用でき
る。また、合成油としては、例えば、ポリα−オレフィ
ン（ポリブテン、１−オクテンオリゴマー、１−デセン
オリゴマーなど）、アルキルベンゼン、アルキルナフタ
レン、ジエステル（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３−エチルヘキシルセバケ
ートなど）、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など）、ポリ
オキシアルキレングリコール、ポリフェニルエーテル、
シリコーン油、パーフルオロアルキルエーテル等が使用
できる。これらの基油は単独でも、２種以上組み合わせ
て使用してもよい。これらの基油の好ましい動粘度は10
0℃において３〜20cStである。The lubricating base oil in the present invention is not particularly limited, and any mineral oil or synthetic oil can be used as long as it is generally used as a base oil for engine oils. As the mineral oil, for example, lubricating oil fraction obtained by atmospheric distillation and vacuum distillation of crude oil, solvent removal, solvent extraction,
A base oil such as a paraffinic or naphthenic oil refined by appropriately combining refining treatments such as hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment can be used. Examples of the synthetic oil include poly-α-olefin (polybutene, 1-octene oligomer, 1-decene oligomer, etc.), alkylbenzene, alkylnaphthalene, diester (ditridecylglutarate, di2-
Ethylhexyl adipate, diisodecyl adipate,
Ditridecyl adipate, di-3-ethylhexyl sebacate, etc.), polyol esters (trimethylolpropane caprylate, trimethylolpropaneperargonate, pentaerythritol 2-ethylhexanoate, pentaerythritol pelargonate, etc.), polyoxyalkylene glycol, poly Phenyl ether,
Silicone oil, perfluoroalkyl ether and the like can be used. These base oils may be used alone or in combination of two or more. The preferred kinematic viscosity of these base oils is 10
It is 3-20 cSt at 0 ° C.

本発明のアルカリ土類金属ホウ酸塩は、一般式MO・xB
2O3で表されるものである。式中、Ｍはアルカリ土類金
属原子を示し、ｘは0.5〜3.0の正数を示す。アルカリ土
類金属としては、マグネシウム、カルシウム、バリウム
などがあげられるが、カルシウムが好ましい。また、ア
ルカリ土類金属ホウ酸塩の粒径は0.1μｍ以下、好まし
くは、0.05μｍ以下であるのが望ましい。このアルカリ
土類金属ホウ酸塩としては、純物を用いてもよいが、ア
ルカリ土類金属ホウ酸塩で油溶性金属塩を過塩基化させ
たもの（以下、アルカリ土類金属ホウ酸塩分散体とい
う）を用いてもよい。このアルカリ土類金属ホウ酸塩分
散体のJIS K2501 5.2.3による全塩基価は、100以上、好
ましくは、170以上であるのが望ましい。このアルカリ
土類金属ホウ酸塩分散体としては、油溶性のアルカリ土
類金属スルホネート、アルカリ土類金属サリシレート、
アルカリ土類金属フェネート、アルカリ土類金属ホスホ
ネートなどの油溶性金属塩、アルカリ土類金属水酸化物
または酸化物、ならびにホウ酸または無水ホウ酸を反応
せしめて得られるものであって、油溶性金属塩として
は、アルカリ土類金属サリシレートを用いるのが好まし
い。アルカリ土類金属ホウ酸塩分散体の製造法は任意で
あるが、例えば、上記油溶性金属塩、アルカリ土類金属
水酸化物または酸化物、ならびにホウ酸または無水ホウ
酸を水、メタノール、エタノール、プロパノール、ブタ
ノールなどのアルコール及びベンゼン、トルエン、キシ
レンなどの希釈溶剤の存在下で20〜200℃で２〜８時間
反応させ、つぎに100〜200℃に加熱して水および必要に
応じてアルコールおよび希釈溶剤を除去することにより
得られる。これらの詳細な反応条件は、原料、反応物の
量等に応じて適宜選択される。なお、製造法の詳細につ
いては、例えば特開昭60−116688号公報、同61−204298
号公報等に記載されている。上記方法で製造されたアル
カリ土類金属ホウ酸塩分散体の粒径は通常0.1μｍ以
下、全塩基価は通常100以上となるので、好ましく用い
られる。The alkaline earth metal borate of the present invention has the general formula MO
It is represented by 2 O 3 . In the formula, M represents an alkaline earth metal atom, and x represents a positive number of 0.5 to 3.0. Examples of the alkaline earth metal include magnesium, calcium, barium and the like, with calcium being preferred. The particle size of the alkaline earth metal borate is preferably 0.1 μm or less, more preferably 0.05 μm or less. As the alkaline earth metal borate, a pure substance may be used, but an alkaline earth metal borate overbased on an oil-soluble metal salt (hereinafter referred to as an alkaline earth metal borate dispersion) is used. Body). The alkaline earth metal borate dispersion preferably has a total base number according to JIS K2501 5.2.3 of 100 or more, preferably 170 or more. As the alkaline earth metal borate dispersion, oil-soluble alkaline earth metal sulfonate, alkaline earth metal salicylate,
An oil-soluble metal salt obtained by reacting an oil-soluble metal salt such as an alkaline earth metal phenate or an alkaline earth metal phosphonate, an alkaline earth metal hydroxide or oxide, and boric acid or boric anhydride; As the salt, it is preferable to use an alkaline earth metal salicylate. The method for producing the alkaline earth metal borate dispersion is optional.For example, the above oil-soluble metal salt, alkaline earth metal hydroxide or oxide, and boric acid or boric anhydride can be converted to water, methanol, ethanol. Reaction in the presence of alcohols such as propanol and butanol and diluting solvents such as benzene, toluene and xylene at 20 to 200 ° C. for 2 to 8 hours, and then heating to 100 to 200 ° C. to produce water and optionally alcohol. And by removing the diluting solvent. These detailed reaction conditions are appropriately selected according to the raw materials, the amount of the reactants, and the like. For details of the production method, see, for example, JP-A-60-116688 and JP-A-61-204298.
No., etc. The alkaline earth metal borate dispersion produced by the above method is preferably used because the particle diameter is usually 0.1 μm or less and the total base number is usually 100 or more.

このアルカリ土類金属ホウ酸塩の含有量は、組成物全
量基準で、0.01〜10重量％、好ましくは0.05〜３重量
％、さらには0.05〜１重量％であることが必要である。
含有量が0.01重量％に満たない場合には、効果がなく、
含有量が10重量％を超える場合には、硫酸灰が高くな
り、好ましくない。The content of the alkaline earth metal borate should be 0.01 to 10% by weight, preferably 0.05 to 3% by weight, and more preferably 0.05 to 1% by weight based on the total amount of the composition.
If the content is less than 0.01% by weight, there is no effect,
If the content exceeds 10% by weight, the amount of sulfated ash increases, which is not preferable.

本発明のアルコール系燃料用エンジン油組成物に対し
て、さらにその優れた性能を高めるため、必要に応じて
公知の添加剤を使用することができる。この添加剤とし
ては、たとえば、高級アルコール、高級脂肪酸、エステ
ルなどの油性剤、トリクレジルホスフェート、トリフェ
ニルホスフェート、ジチオリン酸亜鉛、二硫化モリブデ
ン、ジチオリン酸モリブデン、ジチオカルバミン酸モリ
ブデンなどの極圧剤、摩擦低減剤、石油スルホネート、
ジノニルナフタレンスルホネートなどの錆止め剤、ベン
ゾトリアゾールなどの金属不活性化剤、アルカリ土類金
属スルホネート、アルカリ土類金属サリシレート、アル
カリ土類金属フェネート、アルカリ土類金属ホスホネー
トなどの金属系清浄剤、こはく酸イミド、こはく酸エス
テル、ベンジルアミンなどの無灰分散剤、シリコーンな
どの消泡剤、ポリメタクリレート、ポリイソブチレン、
ポリスチレンなどの粘度指数向上剤、流動点降下剤、フ
ェノール系、アミン系、ジチオ燐酸亜鉛などの酸化防止
剤などが挙げられ、これらを単独または２種以上組み合
わせて添加することができる。粘度指数向上剤の含有量
は通常１〜30重量％、消泡剤の含有量は通常0.0005〜１
重量％、金属不活性化剤の含有量は通常0.005〜１重量
％、その他の添加剤の含有量は、それぞれ通常0.1〜15
重量％（いずれも組成物全量基準）である。In order to further enhance the excellent performance of the engine oil composition for an alcohol-based fuel of the present invention, known additives can be used as needed. Examples of the additive include oily agents such as higher alcohols, higher fatty acids and esters, extreme pressure agents such as tricresyl phosphate, triphenyl phosphate, zinc dithiophosphate, molybdenum disulfide, molybdenum dithiophosphate, and molybdenum dithiocarbamate; Friction reducing agent, petroleum sulfonate,
Rust inhibitors such as dinonylnaphthalene sulfonate, metal deactivators such as benzotriazole, alkaline earth metal sulfonates, alkaline earth metal salicylates, alkaline earth metal phenates, and alkaline detergents such as alkaline earth metal phosphonates, amber Acid imides, succinic esters, ashless dispersants such as benzylamine, defoamers such as silicone, polymethacrylate, polyisobutylene,
Examples include viscosity index improvers such as polystyrene, pour point depressants, antioxidants such as phenol-based, amine-based, and zinc dithiophosphate, and these can be added alone or in combination of two or more. The content of the viscosity index improver is usually 1 to 30% by weight, and the content of the defoamer is usually 0.0005 to 1%.
% By weight, the content of the metal deactivator is usually 0.005 to 1% by weight, and the content of other additives is usually 0.1 to 15%.
% (All based on the total amount of the composition).

本発明のアルコール系燃料用エンジン油組成物は、メ
タノール、エタノール、プロパノールまたはこれらの混
合物、ならびにこれらのアルコールとガソリン、灯油、
軽油などの石油系燃料との混合物でアルコール含有量が
10容量％以上のものなどを燃料とする、スパーク点火式
あるいは圧縮点火式のエンジンに好ましく使用できる。The engine oil composition for an alcohol-based fuel of the present invention includes methanol, ethanol, propanol or a mixture thereof, and an alcohol and gasoline of these, kerosene,
A mixture with petroleum fuels such as light oil has a low alcohol content.
It can be preferably used for a spark ignition type or compression ignition type engine using 10% by volume or more as fuel.

［実施例］ 以下、本発明の内容を実施例および比較例によりさら
に具体的に説明するが、本発明はこれらの実施例に何等
限定されるものではない。EXAMPLES Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

実施例1,2および比較例1,2 本発明の組成物のギ酸中和性能を調べるため、精製鉱
油（SAE30、10.0cSt＠100℃）にホウ酸カルシウムで過
塩基化した油溶性金属塩を所定量添加したエンジン油組
成物にギ酸を所定量投入し、30秒後のpHを調べた。その
結果を第１表に示す。また比較のため、ホウ酸カルシウ
ムのかわりに炭酸カルシウムで過塩基化した油溶性金属
塩を上記鉱油に配合したものについても同様の試験を行
い、その結果も第１表に併記した。Examples 1 and 2 and Comparative Examples 1 and 2 In order to examine the formic acid neutralizing performance of the composition of the present invention, an oil-soluble metal salt overbased with calcium borate was added to refined mineral oil (SAE30, 10.0 cSt ＠ 100 ° C.). A predetermined amount of formic acid was added to the engine oil composition to which a predetermined amount was added, and the pH after 30 seconds was examined. Table 1 shows the results. For comparison, the same test was carried out for the above-mentioned mineral oil in which an oil-soluble metal salt overbased with calcium carbonate was used instead of calcium borate, and the results are also shown in Table 1.

実施例３〜５および比較例３〜５ 本発明の組成物の耐摩耗性能を調べるため、精製鉱油
（SAE10、4.3cSt＠100℃）にホウ酸カルシウムで過塩基
化した油溶性金属塩を２重量％添加したエンジン油組成
物につき高速４球試験（条件：荷重30Kg、回転数1200rp
m、試験時間30min）を行った。その結果を第２表に示
す。また比較のため、ホウ酸カルシウムのかわりに炭酸
カルシウムで過塩基化した油溶性金属塩を上記鉱油に同
量配合したものについても同様の試験を行い、その結果
も第２表に併記した。 Examples 3 to 5 and Comparative Examples 3 to 5 In order to examine the abrasion resistance performance of the composition of the present invention, an oil-soluble metal salt overbased with calcium borate was added to refined mineral oil (SAE10, 4.3 cSt @ 100 ° C.). High-speed 4-ball test for engine oil composition with weight% added (Condition: load 30Kg, rotation speed 1200rp
m, test time 30 min). Table 2 shows the results. For comparison, a similar test was conducted for the same mineral oil blended with an oil-soluble metal salt overbased with calcium carbonate instead of calcium borate. The results are also shown in Table 2.

実施例６〜８および比較例６〜８ 本発明の組成物の加水分解安定性を調べるため、精製
鉱油（SAE10、4.3cSt＠100℃）にホウ酸カルシウムで過
塩基化した油溶性金属塩を15重量％添加したエンジン油
組成物につきASTM D2619に準拠して加水分解安定性試験
を行った。その結果を第３表に示す。また比較のため、
ホウ酸カルシウムのかわりに炭酸カルシウムで過塩基化
した油溶性金属塩を上記鉱油に同量配合したものについ
ても同様の試験を行い、その結果も第３表に併記した。 Examples 6 to 8 and Comparative Examples 6 to 8 In order to examine the hydrolysis stability of the composition of the present invention, an oil-soluble metal salt overbased with calcium borate was added to refined mineral oil (SAE10, 4.3 cSt @ 100 ° C). A 15% by weight added engine oil composition was subjected to a hydrolysis stability test in accordance with ASTM D2619. Table 3 shows the results. For comparison,
The same test was conducted for the same mineral oil blended with an oil-soluble metal salt overbased with calcium carbonate instead of calcium borate. The results are also shown in Table 3.

［発明の効果］ 上記試験の結果から明らかなように、本発明のアルコ
ール系燃料用エンジン油組成物は、従来のアルコール系
燃料用エンジン油に比べてギ酸中和性、耐摩耗性、加水
分解安定性のいずれにおいても優れているものである。 [Effects of the Invention] As is clear from the results of the above test, the engine oil composition for alcohol-based fuel of the present invention has a formic acid neutralizing property, abrasion resistance, and hydrolysis as compared with the conventional alcohol-based engine oil. It is excellent in all stability.

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C10M 125/26 C10N 40:25 ＣＡ（ＳＴＮ)──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) C10M 125/26 C10N 40:25 CA (STN)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】潤滑油基油に、必須成分として、アルカリ
土類金属ホウ酸塩を組成物全量基準で0.01〜10重量％含
有せしめたことを特徴とするアルコール系燃料用エンジ
ン油組成物。1. An engine oil composition for an alcohol-based fuel, wherein the lubricating base oil contains an alkaline earth metal borate as an essential component in an amount of 0.01 to 10% by weight based on the total amount of the composition.
JP2063741A 1990-03-14 1990-03-14 Engine oil composition for alcohol fuel Expired - Lifetime JP2814131B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2063741A JP2814131B2 (en) 1990-03-14 1990-03-14 Engine oil composition for alcohol fuel
DE69105788T DE69105788T2 (en) 1990-03-14 1991-03-11 Method of lubricating alcohol-based fuel engines.
EP91103710A EP0447915B1 (en) 1990-03-14 1991-03-11 Method for lubricating alcohol-based engines
US08/277,160 US5739088A (en) 1990-03-14 1994-07-19 Method of lubricating an alcohol-based fuel engine with an engine oil composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2063741A JP2814131B2 (en) 1990-03-14 1990-03-14 Engine oil composition for alcohol fuel

Publications (2)

Publication Number Publication Date
JPH03263496A JPH03263496A (en) 1991-11-22
JP2814131B2 true JP2814131B2 (en) 1998-10-22

Family

ID=13238139

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EP (1) EP0447915B1 (en)
JP (1) JP2814131B2 (en)
DE (1) DE69105788T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007009123A (en) * 2005-07-01 2007-01-18 Nippon Oil Corp Lubricating oil composition for oxygen-containing fuel engine
JP5134270B2 (en) * 2007-03-19 2013-01-30 Ｊｘ日鉱日石エネルギー株式会社 Lubricating oil composition for internal combustion engines
WO2018212340A1 (en) * 2017-05-19 2018-11-22 Ｊｘｔｇエネルギー株式会社 Internal combustion engine lubricating oil composition

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679584A (en) * 1970-06-01 1972-07-25 Texaco Inc Overbased alkaline earth metal sulfonate lube oil composition manufacture
US4724091A (en) * 1983-03-31 1988-02-09 The Lubrizol Corporation Alkyl phenol and amino phenol compositions and two-cycle engine oils and fuels containing same
GB2149810B (en) * 1983-11-15 1987-04-08 Shell Int Research Borated basic metal salt and oil composition containing it
JPS61204298A (en) * 1985-03-08 1986-09-10 Nippon Oil Co Ltd Production of dispersion of alkaline earth metal borate
ATE92094T1 (en) * 1987-01-30 1993-08-15 Lubrizol Corp GEAR LUBRICANT COMPOSITION.
FR2612526B1 (en) * 1987-03-17 1990-02-02 Elf France PROCESS FOR THE PREPARATION OF AN OVERALCANIZED ADDITIVE CONTAINING A BORON DERIVATIVE, THE ADDITIVE THUS OBTAINED AND LUBRICANT COMPOSITIONS CONTAINING THE ADDITIVE

Also Published As

Publication number Publication date
EP0447915B1 (en) 1994-12-14
DE69105788T2 (en) 1995-04-27
DE69105788D1 (en) 1995-01-26
EP0447915A1 (en) 1991-09-25
JPH03263496A (en) 1991-11-22

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