JPH05331481A - ２サイクルエンジン用潤滑油組成物 - Google Patents

２サイクルエンジン用潤滑油組成物

Info

Publication number
JPH05331481A
JPH05331481A JP4139405A JP13940592A JPH05331481A JP H05331481 A JPH05331481 A JP H05331481A JP 4139405 A JP4139405 A JP 4139405A JP 13940592 A JP13940592 A JP 13940592A JP H05331481 A JPH05331481 A JP H05331481A
Authority
JP
Japan
Prior art keywords
weight
oil
cst
viscosity
polybutene
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.)
Pending
Application number
JP4139405A
Other languages
English (en)
Inventor
Katsuya Koganei
克也 小金井
Kenji Nomura
健司 野村
Toshiaki Kuribayashi
利明 栗林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tonen General Sekiyu KK
Original Assignee
Tonen Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tonen Corp filed Critical Tonen Corp
Priority to JP4139405A priority Critical patent/JPH05331481A/ja
Priority to EP93304180A priority patent/EP0572273B1/en
Priority to DE69317813T priority patent/DE69317813D1/de
Publication of JPH05331481A publication Critical patent/JPH05331481A/ja
Priority to US08/444,094 priority patent/US5547597A/en
Pending legal-status Critical Current

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    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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    • C10M101/02—Petroleum fractions
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    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
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    • C10M105/42—Complex esters, i.e. compounds containing at least three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compound: monohydroxy compounds, polyhydroxy compounds, monocarboxylic acids, polycarboxylic acids and hydroxy carboxylic acids
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Abstract

(57)【要約】 【構成】 本発明の２サイクルエンジン用潤滑油組成物
は、１００℃での動粘度が９〜１５ｃＳｔのポリオール
エステル３０重量％〜７０重量％、１００℃での動粘度
が２〜５ｃＳｔのジエステル３０重量％〜７０重量％、
分子量５００〜２５００のポリブテン１重量％〜５重量
％及び／又は分子量５，０００〜４０，０００のポリメ
タクリレート１重量％〜５重量％、分散剤５重量％〜２
５重量％からなる。 【効果】 本発明の組成物は、ガソリンとの混和性を維
持しつつ、生分解性に優れると同時に、焼き付き防止
性、清浄性に優れる２サイクルエンジン用潤滑油組成物
である。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、生分解性、ガソリン混
和性、耐焼き付き性に優れる２サイクルエンジン用潤滑
油組成物に関する。
【０００２】
【従来の技術】安価な鉱油系潤滑油を基油とし、必要に
応じて清浄剤及び耐摩耗剤を配合したエンジン油が広く
用いられているが、バイク、船外機等における２サイク
ルエンジンにおいては、潤滑油の機能としてガソリンと
の混和性、焼き付き防止性の他に環境問題に対する意識
が高まる中、生分解性に対する要求がある。即ち、２サ
イクルエンジンから排出される未燃焼の潤滑油による湖
沼の汚染を防止するため、少ない使用量でも必要性能を
確保できる高いエンジン油性能を有すると共に、排出さ
れていも水中の生物に容易に分解される生分解性を有す
る潤滑油が求められている。
【０００３】そのため、最近、生分解性の良好なポリオ
ールエステルを主成分とし、ガソリン混和性を確保する
ため、希釈油として灯油や水添鉱油を配合したタイプの
生分解性潤滑油が市販されはじめているが、希釈油とし
て使用される炭化水素系基油は生分解性が低いため、こ
れを配合した製品は生分解特性が低下し、生分解性に関
してはまだ不充分なものである。
【０００４】
【発明が解決しようとする課題】本発明は、エンジン油
としてガソリン混和性、耐焼き付き性に優れると共に生
分解性に優れる２サイクルエンジン用潤滑油組成物の提
供を課題とする。
【０００５】
【課題を解決するための手段】本発明の２サイクルエン
ジン用潤滑油組成物は、（１）１００℃での動粘度が９
〜１５ｃＳｔのポリオールエステル３０重量％〜７０重
量％、（２）１００℃での動粘度が２〜５ｃＳｔのジエ
ステル３０重量％〜７０重量％、（３）分子量５００〜
２５００のポリブテン１重量％〜５重量％及び／又は分
子量５，０００〜４０，０００のポリメタクリレート１
重量％〜５重量％、（４）分散剤５重量％〜２５重量％
からなる。
【０００６】まず、本発明におけるポリオールエステル
は、まず、脂肪族多価アルコールと直鎖状又は分岐状の
脂肪酸とのポリエステル類がある。
【０００７】このポリエステル類を形成する脂肪族多価
アルコールとしては、ネオペンチルグリコール、トリメ
チロールプロパン、ジトリメチロールプロパン、トリメ
チロールエタン、ジトリメチロールエタン、ペンタエリ
スリトール、ジペンタエリスリトール、トリペンタエリ
スリトール等があり、また脂肪酸としては炭素数１６〜
２４のものを使用することができ、好ましい脂肪酸はヘ
プタデシル酸、ステアリン酸、ノナデカン酸、アラキン
酸、ベヘン酸、リグノセリン酸等である。また、上記脂
肪族多価アルコールと直鎖状又は分岐状の脂肪酸との部
分エステル類も使用できる。これらの部分エステルは、
脂肪族多価アルコールと脂肪酸の反応モル数を適宜調節
して反応させることにより得られる。
【０００８】これらのポリオールエステルは、１００℃
での動粘度が９〜１５ｃＳｔ、好ましくは１１〜１４ｃ
Ｓｔのものであり、生分解性に優れ、潤滑油基油として
使用される。粘度が９ｃＳｔ未満のものは耐焼き付き性
の面で劣るものであり、また１５ｃＳｔを越えると生分
解性が低下する問題がある。
【０００９】ポリオールエステルは３０重量％〜７０重
量％、好ましくは４０重量％〜６０重量％存在させると
よく、３０重量％未満であると耐焼き付き性が低下する
傾向があり、７０重量％を越えるとガソリン混和性が低
下する。
【００１０】次に、ジエステルは、カルボン酸成分とし
ては炭素数６〜１０の直鎖状又は分岐状の脂肪族二塩基
酸、具体的には、アジピン酸、ピメリン酸、スベリン
酸、アゼライン酸、セバシン酸及びこれらと同等の性状
を有するものが挙げられる。アルコール成分としては炭
素数６〜１０の脂肪族アルコールであり、具体的にはヘ
キシルアルコール、ヘプチルアルコール、オクチルアル
コール、ノニルアルコール、及びデシルアルコール、並
びにこれらの異性体が挙げられる。
【００１１】ジエステルは、１００℃での動粘度が２〜
５ｃＳｔ、好ましくは２〜４ｃＳｔのものであり、ガソ
リンとの混和性向上を目的として添加され、５ｃＳｔを
越えると希釈性が悪くなる。
【００１２】ジエステルは３０重量％〜７０重量％、好
ましくは４０重量％〜５０重量％存在させるとよく、３
０重量％未満であると、ガソリンとの混和性が悪くな
り、７０重量％を越えると耐焼き付き性が悪化するとい
った問題がある。
【００１３】ポリブテンは、分子量５００〜２５００、
好ましくは５００〜１５００、より好ましくは７００〜
１０００のものであり、焼き付き防止を目的として重質
基油成分として添加され、分子量が２５００を越えると
耐焼き付き性の改善効果が小さくなる。
【００１４】ポリブテンは、１重量％〜５重量％、好ま
しくは１．５重量％〜３．５重量％添加され、５重量％
を越えると粘度調整の観点から、低粘度ジエステルの配
合量が増大し、結果的に耐焼き付き性が低下するといっ
た問題がある。
【００１５】また、本発明においてはポリブテンに代え
てポリメタクリレートを使用してもよい。ポリメタクリ
レートは、分子量５，０００〜４０，０００、好ましく
は１０，０００〜２０，０００のものであり、焼き付き
防止を目的として重質基油成分として添加され、分子量
が４０，０００を越えると耐焼き付き性の改善効果が小
さくなる。
【００１６】ポリメタクリレートは、分散型、非分散型
のものがあり、下記の構造を有するものが挙げられる。
【００１７】
【化１】
【００１８】上記式中、Ｒは炭素数１〜１８の炭化水素
基、Ｒ′は水素またはメチル基、Ｘは極性基、ｎは１０
〜１０００の整数を示す。
【００１９】ポリメタクリレートは１重量％〜５重量
％、好ましくは２重量％〜５重量％添加され、５重量％
を越えると清浄性が悪化するといった問題がある。ま
た、ポリメタクリレートと共にポリブテンを併用して添
加してもよい。
【００２０】分散剤としては、無灰タイプのものが好ま
しく、ポリアミド類、コハク酸イミド類（硼素変成タイ
プを含む）、ベンジルアミン類（硼素変成タイプを含
む）が挙げられ、例えばポリアミド類としては商品名ル
ブリゾール（株）製のルブリゾール３９０、ルブリゾー
ル３９７、ルブリゾール３９８、オロナイトジャパン
（株）製のオロナイト３４０Ｒ、オロナイトＲＢが挙げ
られる。これらはピストン／シリンダー部位にデポジッ
トやワニスが生成しないことを目的として添加され、５
重量％〜２５重量％、好ましくは１０重量％〜２０重量
％添加される。
【００２１】その他、本発明の組成物には、必要に応じ
て防錆剤、消泡剤、金属清浄剤、耐摩耗剤、酸化防止
剤、流動点降下剤等が添加される。また、本発明の２サ
イクルエンジン用潤滑油組成物は、ガソリンとの混合比
が１００：１まで低オイル混合仕様でも使用することが
できる。
【００２２】
【作用及び発明の効果】本発明の組成物は、ポリオール
エステルにガソリンとの混和性を目的としてジエステル
を添加すると共に、焼き付き防止性を目的としてポリブ
テン及び／またはポリメタクリレート、清浄性を目的と
して無灰分散剤を添加して構成され、また、ポリオール
エステル、ジエステル共に生分解性に優れるので、生分
解性、耐焼き付き性、ガソリン混和性等の要求性能が必
要な船外機用またはチェーン・ソー用等の２サイクルエ
ンジン用潤滑油組成物として適したものとすることがで
きる。以下、実施例により本発明を説明する。
【００２３】
【実施例】下記組成の本発明の試料油１を調製した。
【００２４】 （１）トリメチロールプロパン１モルとＣ18モノカルボン酸３モルとのエステル 化物（粘度１３ｃＳｔ、１００℃） ・・・ ４３．５重量％ （２）アジピン酸とＣ8 モノアルコールとのエステル化物（粘度２．５ｃＳｔ、 １００℃） ・・・ ３９．５重量％ （３）ポリブテン〔分子量１５００、７５０ｃＳｔ（１００℃）〕 ・・・ ２．０重量％ （４）ポリアミド系無灰分散剤（商品名ルブリゾール３９７、ルブリゾール（株 ）製） ・・・ １５．０重量％。
【００２５】下記組成の本発明の試料油２を調製した。
【００２６】 （１）トリメチロールプロパン１モルとＣ18モノカルボン酸３モルとのエステル 化物（粘度１３ｃＳｔ、１００℃） ・・・ ４３．５重量％ （２）アジピン酸とＣ8 モノアルコールとのエステル化物（粘度２．５ｃＳｔ、 １００℃） ・・・ ３９．５重量％ （３）ポリブテン〔分子量８００、１２０ｃＳｔ（１００℃）〕 ・・・ ２．０重量％ （４）ポリアミド系無灰分散剤（商品名ルブリゾール３９７、ルブリゾール（株 ）製） ・・・ １５．０重量％。
【００２７】下記組成の本発明の試料油３を調製した。
【００２８】 （１）トリメチロールプロパン１モルとＣ18モノカルボン酸３モルとのエステル 化物（粘度１３ｃＳｔ、１００℃） ・・・ ３４．０重量％ （２）アジピン酸とＣ8 モノアルコールとのエステル化物（粘度２．５ｃＳｔ、 １００℃） ・・・ ４９．０重量％ （３）ポリメチルメタクリレート〔分子量２０，０００〕 ・・・ ２．０重量％ （４）ポリアミド系無灰分散剤（商品名ルブリゾール３９７、ルブリゾール（株 ）製） ・・・ １５．０重量％。
【００２９】下記組成の本発明の試料油４を調製した。
【００３０】 （１）トリメチロールプロパン１モルとＣ18モノカルボン酸３モルとのエステル 化物（粘度１３ｃＳｔ、１００℃） ・・・ ３４．０重量％ （２）アジピン酸とＣ8 モノアルコールとのエステル化物（粘度２．５ｃＳｔ、 １００℃） ・・・ ４９．０重量％ （３）ポリメチルメタクリレート〔分子量１０，０００〕 ・・・ ２．０重量％ （４）ポリアミド系無灰分散剤（商品名ルブリゾール３９７、ルブリゾール（株 ）製） ・・・ １５．０重量％。
【００３１】以上で調製した各潤滑油組成物について、
（１）生分解性、（２）耐焼き付き性、（３）清浄性、
（４）ガソリン混和性、低温流動性について試験をおこ
なった。試験で使用した比較油の組成について記載す
る。
【００３２】 〔比較油１〕 （１）鉱油１（粘度１３ｃＳｔ、１００℃） ・・・ ５８．０重量％ （２）鉱油２（粘度３１ｃＳｔ、１００℃） ・・・ ８．０重量％ （３）灯油 （沸点範囲１５５℃〜２７０℃） ・・・ １９．０重量％ （４）ポリアミド系分散剤 ・・・ １５．０重量％ 〔比較油２〕 （１）ポリブテン１（粘度９０ｃＳｔ、１００℃） ・・・ ５．０重量％ （２）ポリブテン２（粘度２４０ｃＳｔ、１００℃）・・・ １５．０重量％ （３）灯油（沸点範囲１５５℃〜２７０℃） ・・・ ２０．０重量％ （４）鉱油（粘度１３ｃＳｔ、１００℃） ・・・ ５５．０重量％ （５）Ｃａスルホネート ・・・ １．０重量％ （６）コハク酸イミド ・・・ ４．０重量％ 〔比較油３〕 （１）トリメチロールプロパン１モルとＣ18モノカルボン酸３モルとのエステ ル化物（粘度１５ｃＳｔ、１００℃） ・・・ ７２．０重量％ （２）灯油（沸点範囲１５５℃〜２７０℃） ・・・ １８．０重量％ （３）ポリアミド系無灰分散剤（商品名ルブリゾール３９７、ルブリゾール（ 株）製） ・・・ １０．０重量％ 。
【００３３】（Ａ）生分解性について 本発明の試料油、比較油３０ｍｇに、修正ＭＩＴＩ法に
基づき、それぞれ基礎培養液３００ｃｃ、及び菌培養物
（都市下水処理プラントからの汚水を人工下水にて順化
したもの）を添加し、２５℃、２８日間攪拌し、微生物
が油を分解するために消費する酸素量と理論酸素量の比
から生分解性を評価した。本発明の試料油についての結
果を表１に、比較油についての結果を表２に示す。
【００３４】（Ｂ）耐焼き付き性 下記の条件で、点火プラグ温度の上昇により、試験開始
温度２４５℃より５℃ずつ上げ、エンジンが焼き付き状
態に至った時のプラグ温度で、耐焼き付き性能を評価し
た。結果を同様に表１、表２に示す。 供試エンジン：富士重工ロビンエンジン（ＥＣ−１０
Ｄ） 燃料／オイル：１００：１ 試験サイクル：全負荷（５分）、無負荷（１分）を１サ
イクルで計４サイクル
【００３５】
【表１】
【００３６】
【表２】
【００３７】表１、２から、本発明の試料油は、比較油
に比して、生分解性が高く、また焼き付き時のプラグ座
温の高い潤滑油組成物であることがわかる。
【００３８】（Ｃ）清浄性 富士重工ロビンエンジン（ＥＣ−１０Ｄ）にて、全負荷
５０００ｒｐｍで４時間運転した後、リング及びピスト
ンの状態を評価した。（プラグ座温２１５〜２１８℃、
燃料／オイル＝１００／１）
【００３９】
【表３】
【００４０】
【表４】
【００４１】本発明の試料油は、比較油に比してリング
及びピストンの評点が優れることがわかる。
【００４２】（Ｄ）ガソリン混和性、低温流動性 ガソリン混和性、低温流動性についてはＡＳＴＭＤ４６
８２により、評価した。結果を下記に示す。
【００４３】
【表５】
【００４４】本発明の試料は、従来品と同様のガソリン
混和性、流動点を示すことがわかる。
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｍ 143:06 145:14） Ｃ１０Ｎ 20:02 20:04 30:00 Ｚ 8217−4Ｈ 30:04 30:06 40:26

Claims (1)

    【特許請求の範囲】
  1. 【請求項１】（１）１００℃での動粘度が９〜１５ｃＳ
    ｔのポリオールエステル３０重量％〜７０重量％、
    （２）１００℃での動粘度が２〜５ｃＳｔのジエステル
    ３０重量％〜７０重量％、（３）分子量５００〜２５０
    ０のポリブテン１重量％〜５重量％及び／又は分子量
    ５，０００〜４０，０００のポリメタクリレート１重量
    ％〜５重量％、（４）分散剤５重量％〜２５重量％から
    なる２サイクルエンジン用潤滑油組成物。
JP4139405A 1992-05-29 1992-05-29 ２サイクルエンジン用潤滑油組成物 Pending JPH05331481A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP4139405A JPH05331481A (ja) 1992-05-29 1992-05-29 ２サイクルエンジン用潤滑油組成物
EP93304180A EP0572273B1 (en) 1992-05-29 1993-05-28 Lubricating oil compositions containing dispersants for two-cycle engines
DE69317813T DE69317813D1 (de) 1992-05-29 1993-05-28 Dispergatoren enthaltende Schmierölzusammensetzungen für Zweitaktmotoren
US08/444,094 US5547597A (en) 1992-05-29 1995-05-18 Lubricating oil composition for two-cycle engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4139405A JPH05331481A (ja) 1992-05-29 1992-05-29 ２サイクルエンジン用潤滑油組成物

Publications (1)

Publication Number Publication Date
JPH05331481A true JPH05331481A (ja) 1993-12-14

Family

ID=15244496

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Country Status (4)

Country Link
US (1) US5547597A (ja)
EP (1) EP0572273B1 (ja)
JP (1) JPH05331481A (ja)
DE (1) DE69317813D1 (ja)

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JP2007197509A (ja) * 2006-01-24 2007-08-09 Sanyo Chem Ind Ltd 潤滑油用スラッジ分散剤
KR20160044490A (ko) 2013-08-21 2016-04-25 산요가세이고교 가부시키가이샤 수용성 윤활유

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Also Published As

Publication number Publication date
US5547597A (en) 1996-08-20
EP0572273A1 (en) 1993-12-01
DE69317813D1 (de) 1998-05-14
EP0572273B1 (en) 1998-04-08

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