JP2010280823A - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
- Publication number
- JP2010280823A JP2010280823A JP2009135452A JP2009135452A JP2010280823A JP 2010280823 A JP2010280823 A JP 2010280823A JP 2009135452 A JP2009135452 A JP 2009135452A JP 2009135452 A JP2009135452 A JP 2009135452A JP 2010280823 A JP2010280823 A JP 2010280823A
- Authority
- JP
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- Prior art keywords
- viscosity
- less
- lubricating
- base oil
- oil
- 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.)
- Granted
Links
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- 239000000126 substance Substances 0.000 claims abstract description 15
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 claims abstract description 7
- 238000001228 spectrum Methods 0.000 claims abstract description 5
- 230000001050 lubricating effect Effects 0.000 claims description 69
- 239000010687 lubricating oil Substances 0.000 claims description 69
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- 239000011593 sulfur Substances 0.000 description 15
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Abstract
【解決手段】100℃における動粘度が1〜20mm2/sである潤滑油基油と、13C−NMRにより得られるスペクトルにおいて、全ピークの合計面積に対する化学シフト29−31ppmの間のピークの合計面積M1と化学シフト64−69ppmの間のピークの合計面積M2の比M1/M2が10以上である粘度指数向上剤と、を含有することを特徴とする潤滑油組成物。
【選択図】なし
Description
Stability Index)を意味する。
(1)パラフィン基系原油および/または混合基系原油の常圧蒸留による留出油
(2)パラフィン基系原油および/または混合基系原油の常圧蒸留残渣油の減圧蒸留による留出油(WVGO)
(3)潤滑油脱ろう工程により得られるワックス(スラックワックス等)および/またはガストゥリキッド(GTL)プロセス等により得られる合成ワックス(フィッシャートロプシュワックス、GTLワックス等)
(4)基油(1)〜(3)から選ばれる1種または2種以上の混合油および/または当該混合油のマイルドハイドロクラッキング処理油
(5)基油(1)〜(4)から選ばれる2種以上の混合油
(6)基油(1)、(2)、(3)、(4)または(5)の脱れき油(DAO)
(7)基油(6)のマイルドハイドロクラッキング処理油(MHC)
(8)基油(1)〜(7)から選ばれる2種以上の混合油。
(9)上記基油(1)〜(8)から選ばれる基油または当該基油から回収された潤滑油留分を水素化分解し、その生成物またはその生成物から蒸留等により回収される潤滑油留分について溶剤脱ろうや接触脱ろうなどの脱ろう処理を行い、または当該脱ろう処理をした後に蒸留することによって得られる水素化分解鉱油
(10)上記基油(1)〜(8)から選ばれる基油または当該基油から回収された潤滑油留分を水素化異性化し、その生成物またはその生成物から蒸留等により回収される潤滑油留分について溶剤脱ろうや接触脱ろうなどの脱ろう処理を行い、または、当該脱ろう処理をしたあとに蒸留することによって得られる水素化異性化鉱油。
(I)100℃における動粘度が1.5mm2/s以上3.5mm2/s未満、より好ましくは2.0〜3.0mm2/sの潤滑油基油
(II)100℃における動粘度が3.5mm2/s以上4.5mm2/s未満、より好ましくは3.5〜4.1mm2/sの潤滑油基油
(III)100℃における動粘度が4.5〜10mm2/s、より好ましくは4.8〜9mm2/s、特に好ましくは5.5〜8.0mm2/sの潤滑油基油。
(IV)40℃における動粘度が6.0mm2/s以上12mm2/s未満、より好ましくは8.0〜12mm2/sの潤滑油基油
(V)40℃における動粘度が12mm2/s以上28mm2/s未満、より好ましくは13〜19mm2/sの潤滑油基油
(VI)40℃における動粘度が28〜50mm2/s、より好ましくは29〜45mm2/s、特に好ましくは30〜40mm2/sの潤滑油基油。
ρ=0.0025×kv100+0.816 (A)
[式中、kv100は潤滑油基油成分の100℃における動粘度(mm2/s)を示す。]
A=4.3×kv100+100 (B)
[式中、kv100は潤滑油基油の100℃における動粘度(mm2/s)を示す。]
D 2425−93に記載の方法、ASTM D 2549−91に記載の方法、高速液体クロマトグラフィ(HPLC)による方法、あるいはこれらの方法を改良した方法等を挙げることができる。
(a)化学シフト約10−70ppmの積分強度の合計(炭化水素の全炭素に起因する積分強度の合計)、及び
(b)化学シフト29−31ppmの積分強度の合計(特定のε−メチレン構造に起因する積分強度の合計)、及び
(c)化学シフト64−69ppmの積分強度の合計(特定のα−メチレンに由来する積分強度の合計)
をそれぞれ測定し、(a)100%とした時の(b)の割合(%)を算出しM1とした。また、(a)100%とした時の(c)の割合(%)を算出しM2とした。
ΔKV40/ΔKV100が0.5未満の場合には、粘度の増加効果や溶解性が小さくコストが上昇するおそれがあり、4.0を超える場合には、粘度温度特性の向上効果や低温粘度特性に劣るおそれがある。なお、ΔKV40はSK社製YUBASE4に粘度指数向上剤を3.0%添加したときの、40℃における動粘度の増加分を意味し、ΔKV100はSK社製YUBASE4に粘度指数向上剤を3.0%添加したときの、100℃における動粘度の増加分を意味する。
0.5未満の場合には、粘度の増加効果や溶解性が小さくコストが上昇するおそれがあり、2.0を超える場合には、粘度温度特性の向上効果や低温粘度特性に劣るおそれがある。
実施例1〜2および比較例1〜3においては、それぞれ以下に示す基油および添加剤を用いて潤滑油組成物を調製した。基油1の性状を表1に、潤滑油組成物の性状を表2に、それぞれ示す。
(基油)
基油1:n−パラフィン含有油を水素化分解/水素化異性化した鉱油
(添加剤)
A−1:ポリメタアクリレート(M1=40.13、M2=1.73、M1/M2=23.15、ΔKV40/ΔKV100=2.3、ΔHTHS100/ΔHTHS150=1.51、MW=400,000、PSSI=27、Mw/Mn=3.0、Mw/PSSI=14800)
A−2:ポリメタアクリレート(M1=38.38、M2=2.25、M1/M2=17.05、ΔKV40/ΔKV100=2.2、ΔHTHS100/ΔHTHS150=1.50、MW=400,000、PSSI=25、Mw/Mn=3.0、Mw/PSSI=16200)
A−3:分散型ポリメタクリレート(M1=42.27、M2=4.39、M1/M2=9.6、ΔKV40/ΔKV100=4.4、ΔHTHS100/ΔHTHS150=2.15、MW=80,000、Mw/Mn=2.7、PSSI=5、Mw/PSSI=16000)
A−4:分散型ポリメタクリレート(M1=41.07、M2=4.12、M1/M2=9.9、ΔKV40/ΔKV100=3.3、ΔHTHS100/ΔHTHS150=1.79、MW=300,000、Mw/Mn=4.0、PSSI=40、Mw/PSSI=7500)
A−5:スチレン−ジエンコポリマー(M1=0、M1/M2=0、ΔKV40/ΔKV100=5.1、ΔHTHS100/ΔHTHS150=1.90)
B−1:グリセリンモノオレエート
B−2:モリブデンジチオカーバメート
C−1:金属清浄剤、無灰分散剤、酸化防止剤、摩耗防止剤、流動点降下剤、消泡剤等。
実施例1〜2および比較例1〜3の各潤滑油組成物について、40℃および100℃における動粘度、粘度指数、100℃およびまたは150℃におけるHTHS粘度、ならびに−35℃におけるMRV粘度を測定した。各物性値の測定は以下の評価方法により行った。得られた結果を表2に示す。
(1)動粘度:ASTM D−445
(2)粘度指数:JIS K 2283−1993
(3)HTHS粘度:ASTM D−4683
(4)MRV粘度:ASTM D−4684
Claims (4)
- 100℃における動粘度が1〜20mm2/sである潤滑油基油と、
13C−NMRにより得られるスペクトルにおいて、全ピークの合計面積に対する化学シフト29−31ppmの間のピークの合計面積M1と化学シフト64−69ppmの間のピークの合計面積M2の比M1/M2が10以上である粘度指数向上剤と、
を含有することを特徴とする潤滑油組成物。 - 前記粘度指数向上剤が、ポリ(メタ)アクリレート系粘度指数向上剤であることを特徴とする請求項1に記載の潤滑油組成物。
- 前記粘度指数向上剤が、PSSIが40以下、重量平均分子量とPSSIの比が1×104以上のものであるであることを特徴とする請求項1または2に記載の潤滑油組成物。
- 有機モリブデン化合物および無灰摩擦調整剤から選ばれる少なくとも1種の化合物をさらに含有することを特徴とする請求項1〜3のいずれか1項に記載の潤滑油組成物。
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WO2008093446A1 (ja) * | 2007-01-31 | 2008-08-07 | Nippon Oil Corporation | 潤滑油組成物 |
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JP2007262239A (ja) * | 2006-03-28 | 2007-10-11 | Sanyo Chem Ind Ltd | 粘度指数向上剤および潤滑油組成物 |
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