Viscosity modifier of lubricating oil for power transmission system and lubricating oil composition for power transmission system

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United States of America Patent

PATENT NO 8410035
APP PUB NO 20090023619A1
SERIAL NO

11886960

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Abstract

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A lubricating oil composition for a power transmission system, which is excellent in both of low-temperature viscosity property and shear stability, is provided. The viscosity modifier of a lubricating oil for a power transmission system according to the present invention comprises an ethylene/α-olefin copolymer (B) having the properties: (B1) an ethylene content in the range of 70 to 85% by mol, (B2) an intrinsic viscosity [η] in the range of 0.2 to 1.0 dl/g, (B3) Mw/Mn not more than 2.4, and (B4) a melting point, as measured by DSC, not higher than 60° C., or no melting point observed.

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Patent Owner(s)

  • THE LUBRIZOL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ikeda, Satoshi Ichihara, JP 192 1780
Kaneshige, Ryousuke Kisarazu, JP 17 238
Kawasaki, Masaaki Ichihara, JP 72 1503
Matsuda, Akihiro Ichihara, JP 56 612
Okada, Keiji Ichihara, JP 120 2412

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