Lubricant composition for automatic transmission

The invention provides a lubricant composition for automatic transmissions excellent in sustainability of anti-shudder property, low-temperature viscosity characteristics, and oxidation stability, and excellent and well-balanced in durability of friction characteristics, energy-conserving performanc...

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Hauptverfasser:	ITOU, MASAAKI, MURAKAMI, YASUHIRO, SUGIYAMA, TAKAHIRO, MAEDA, MAKOTO, ARAKAWA, YOSHIE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY FUELS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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creator	ITOU, MASAAKI MURAKAMI, YASUHIRO SUGIYAMA, TAKAHIRO MAEDA, MAKOTO ARAKAWA, YOSHIE
description	The invention provides a lubricant composition for automatic transmissions excellent in sustainability of anti-shudder property, low-temperature viscosity characteristics, and oxidation stability, and excellent and well-balanced in durability of friction characteristics, energy-conserving performance, and anti-fatigue performance on gears. The composition contains a base oil having a kinematic viscosity at 100 °C of 3.7-4.1 mm 2 /s, and composed of base oil having the viscosityof 2.5-4.5 mm 2 /s, and base oil having the viscosity of 10-40 mm 2 /s; 1-20 mass% poly(meth)acrylate viscosity index improver having Mw of 15000-30000; 2-4 mass% imide friction modifier having a C8-C30 hydrocarbon group; 0.01-0.04 mass% phosphorus extreme pressure agent in terms of phosphorus; and 0.01-0.04 mass% ashless dispersant having at least one alkyl or alkenyl group of a number average molecular weight of ‰¥2000 in terms of nitrogen, all with respect to the total amount of the composition, and has the viscosity of 5.6-5.8 mm 2 /s.
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The composition contains a base oil having a kinematic viscosity at 100 °C of 3.7-4.1 mm 2 /s, and composed of base oil having the viscosityof 2.5-4.5 mm 2 /s, and base oil having the viscosity of 10-40 mm 2 /s; 1-20 mass% poly(meth)acrylate viscosity index improver having Mw of 15000-30000; 2-4 mass% imide friction modifier having a C8-C30 hydrocarbon group; 0.01-0.04 mass% phosphorus extreme pressure agent in terms of phosphorus; and 0.01-0.04 mass% ashless dispersant having at least one alkyl or alkenyl group of a number average molecular weight of ‰¥2000 in terms of nitrogen, all with respect to the total amount of the composition, and has the viscosity of 5.6-5.8 mm 2 /s.</description><language>eng ; fre ; ger</language><subject>CHEMISTRY ; FUELS ; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS ; LUBRICANTS ; LUBRICATING COMPOSITIONS ; METALLURGY ; PEAT ; PETROLEUM, GAS OR COKE INDUSTRIES ; TECHNICAL GASES CONTAINING CARBON MONOXIDE ; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION</subject><creationdate>2007</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20071024&DB=EPODOC&CC=EP&NR=1847585A2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20071024&DB=EPODOC&CC=EP&NR=1847585A2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>ITOU, MASAAKI</creatorcontrib><creatorcontrib>MURAKAMI, YASUHIRO</creatorcontrib><creatorcontrib>SUGIYAMA, TAKAHIRO</creatorcontrib><creatorcontrib>MAEDA, MAKOTO</creatorcontrib><creatorcontrib>ARAKAWA, YOSHIE</creatorcontrib><title>Lubricant composition for automatic transmission</title><description>The invention provides a lubricant composition for automatic transmissions excellent in sustainability of anti-shudder property, low-temperature viscosity characteristics, and oxidation stability, and excellent and well-balanced in durability of friction characteristics, energy-conserving performance, and anti-fatigue performance on gears. 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language	eng ; fre ; ger
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subjects	CHEMISTRY FUELS INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
title	Lubricant composition for automatic transmission
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