JP2010189479A - 無段変速機油組成物 - Google Patents
無段変速機油組成物 Download PDFInfo
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Abstract
【解決手段】基油と、式(1)のリン化合物を1種含有し、該リン化合物由来のリン含有量が組成物全量基準で0.005〜0.15質量%である無段変速機油組成物。
式(1)中、R1、R2、R3及びR4はそれぞれ炭素数が1〜30のヒドロカルビル基、又は水素原子を、R5は炭素数が1〜30のヒドロカルビレン基を、X1及びX2は酸素原子又は硫黄原子を、nは1〜10の整数を示す。更にコハク酸イミド系分散剤を0.5〜10.0質量%、及びアルカリ土類金属系清浄剤を0.05〜1.0質量%含有することが好ましい。
【選択図】なし
Description
本発明に用いる潤滑油基油としては、通常の潤滑油の基油として用いられている鉱油系及び/又は合成油系基油を用いることができる。
鉱油系基油としては、例えば、原油を常圧蒸留及び減圧蒸留して得られた潤滑油留分を、溶剤脱瀝、溶剤抽出、水素化分解、溶剤脱蝋、接触脱蝋、水素化精製、硫酸洗浄、白土処理等の精製処理等を適宜組み合わせて精製したパラフィン系、ナフテン系等の潤滑油基油や溶剤脱蝋で得たワックスを異性化、脱蝋して得られる潤滑油基油が使用できる。鉱油系基油の動粘度は、通常、100℃において、好ましくは2〜7mm2/s、より好ましくは3〜5mm2/sの範囲から選定するとよい。粘度指数は80以上、特には100以上が好ましい。
これらの粘度指数向上剤の中から適宜選定した1種あるいは2種以上を、効果を発揮する適切な量で含有させることができるが、その量は、通常、組成物全量基準で1〜20質量%の範囲で選定することが好ましい。粘度指数向上剤を含めた潤滑油基油の100℃における動粘度は4〜10mm2/s、特には5〜9mm2/sが好ましく、また粘度指数は120以上、特には140以上が好ましい。
本発明は、下記一般式(1)に示されるリン化合物を少なくとも1種含有する。
なお本発明においては、一般式(1)で表せるリン化合物を少なくとも1種類含有していればよく、これ以外のリン化合物、例えば分子内に一つのリン元素を含むリン酸エステル、亜リン酸エステル、酸性リン酸エステル、酸性亜リン酸エステル、及びこれらのアミン塩等、さらには分子内に硫黄元素をも含むチオリン酸エステル等の一般の潤滑油で摩耗防止剤として使用されているものを混合して用いることもできる。
本発明に用いるコハク酸イミド系分散剤は、コハク酸イミド化合物を主成分とするものであり、このようなコハク酸イミド化合物は、イミド化に際してポリアミンの一端に無水コハク酸が付加した下記一般式(2)のような、いわゆるモノタイプのコハク酸イミドと、ポリアミンの両端に無水コハク酸が付加した下記一般式(3)のような、いわゆるビスタイプのコハク酸イミドがあり、更にそれぞれにホウ素を含有しているものがある。
本発明に用いるアルカリ土類金属系清浄剤は、潤滑油劣化時の無段変速機におけるベルト又はチェーンとプーリー間の摩擦係数の滑り速度依存性を低減し、金属間摩擦特性を向上させることを可能する。このアルカリ土類金属系清浄剤として、マグネシウム、カルシウム、バリウム等のアルカリ土類金属を含有するスルフォネート、フェネート、サリシレートを用いることができる。またそれぞれに高い塩基価(BN)を有する、いわゆる過塩基性の金属系清浄剤、もある。本発明においては、これらの中から選ばれる1種又は2種以上のアルカリ土類金属系清浄剤等、一般の潤滑油で金属系清浄剤として使用されているものを用いることができる。
本発明の無段変速機油組成物は、ジアルキルジチオリン酸亜鉛を実質的に含有しない。なお、ここで、実質的に含有しないとは、ジアルキルジチオリン酸亜鉛を全く含有しないか、又は含有しても、潤滑油劣化時にクラッチ板の目詰まりを引き起こし、その機能を損なわせることがない量以下、具体的には組成物全量基準で亜鉛元素量として0.001質量%以下であることを意味しているが、全く含有しないことがより好ましい。
本発明の無段変速機油組成物には、上記添加剤以外に、更に酸化防止剤、流動点降下剤、摩擦調整剤等を配合することができる。
下記の潤滑油基油及び添加剤を用いて、実施例1〜11及び比較例1〜11の無段変速機油組成物を、表1、2の上部に示す配合割合(添加量は組成物全量基準での質量%)でそれぞれ混合して調製した。
O−1;水素化精製基油(100℃の動粘度:4.3mm2/s、粘度指数:124)
O−2;ジイソデシルアジペート(100℃の動粘度:3.6mm2/s、粘度指数:146)
(1)一般式(1)で表わされるリン化合物
P−1:ホスフォリルトリクロリドとフェノールとレソルシノールとの縮合物
(X1=X2=O、R1=R2=R3=R4=フェニル基、R5=フェニレン基、n=1〜2;本化合物中に占めるリンの割合=10.9質量%)
P−2:トリクレジルホスフェート
P−3:2−エチルヘキシル酸性リン酸エステルオレイルアミン塩
S−1:ホウ素非含有コハク酸イミド(モノタイプ)
S−2:ホウ素非含有コハク酸イミド(ビスタイプ)
S−3:ホウ素含有コハク酸イミド(ビスタイプ、ホウ素含有量:B元素質量として0.5質量%)
C−1:過塩基性Caスルフォネート(TBN:300)
C−2:中性Caスルフォネート(TBN:20)
酸化防止剤、腐食防止剤、流動点降下剤、粘度指数向上剤、摩擦調整剤からなる群から選択して組み合わせたもの(添加剤パッケージ)を、実施例及び比較例全てに共通して同じ量(組成物全量基準で4.9質量%)配合した。
実施例および比較例の無段変速機油について、ASTM D2174に記載のブロックオンリング試験機(LFW−1)を用いて、摩擦係数とブロックの摩耗痕幅を、以下の試験条件下において測定した。なお、摩擦係数は試験開始から60分後(試験終了直前)に測定し、摩耗痕幅は試験終了後に測定したブロックの摩耗痕幅である。
リング:Falex S-10 Test Ring (SAE4620 Steel)
ブロック:Falex H-60 Test Block (SAE01 Steel)
温度:80℃
荷重:445N
滑り速度:0.33m/s
試験時間:60分間
Claims (2)
- 更に(B)コハク酸イミド系分散剤を組成物全量基準で0.5〜10.0質量%、及び(C)アルカリ土類金属系清浄剤を組成物全量基準で0.05〜1.0質量%含有する請求項1に記載の無段変速機油組成物。
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JP2009032870A JP5395453B2 (ja) | 2009-02-16 | 2009-02-16 | 無段変速機油組成物 |
EP10741189A EP2397536A4 (en) | 2009-02-16 | 2010-02-08 | OIL COMPOSITION FOR CONTINUOUS VARIATION TRANSMISSION |
PCT/JP2010/051743 WO2010092912A1 (ja) | 2009-02-16 | 2010-02-08 | 無段変速機油組成物 |
US13/148,348 US8993498B2 (en) | 2009-02-16 | 2010-02-08 | Continuously variable transmission oil composition |
KR1020117021468A KR101636103B1 (ko) | 2009-02-16 | 2010-02-08 | 무단 변속기유 조성물 |
CN2010800080379A CN102317418A (zh) | 2009-02-16 | 2010-02-08 | 无级变速机油组合物 |
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US10135078B2 (en) | 2014-10-15 | 2018-11-20 | Toyota Jidosha Kabushiki Kaisha | Current collector for fuel cell, and fuel cell stack |
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KR20110131209A (ko) | 2011-12-06 |
WO2010092912A1 (ja) | 2010-08-19 |
JP5395453B2 (ja) | 2014-01-22 |
US20110306530A1 (en) | 2011-12-15 |
EP2397536A1 (en) | 2011-12-21 |
US8993498B2 (en) | 2015-03-31 |
KR101636103B1 (ko) | 2016-07-04 |
EP2397536A4 (en) | 2012-12-05 |
CN102317418A (zh) | 2012-01-11 |
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