Invention Grant
- Patent Title: Viscosity modifier of lubricating oil for power transmission system and lubricating oil composition for power transmission system
- Patent Title (中): 动力传动系统润滑油粘度调节剂和动力传动系统润滑油组成
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Application No.: US11886960Application Date: 2006-03-24
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Publication No.: US08410035B2Publication Date: 2013-04-02
- Inventor: Ryousuke Kaneshige , Akihiro Matsuda , Satoshi Ikeda , Keiji Okada , Masaaki Kawasaki
- Applicant: Ryousuke Kaneshige , Akihiro Matsuda , Satoshi Ikeda , Keiji Okada , Masaaki Kawasaki
- Applicant Address: JP Tokyo US OH Wickliffe
- Assignee: Mitsui Chemicals, Inc.,The Lubrizol Corporation
- Current Assignee: Mitsui Chemicals, Inc.,The Lubrizol Corporation
- Current Assignee Address: JP Tokyo US OH Wickliffe
- Agency: Foley & Lardner LLP
- Priority: JP2005-089004 20050325
- International Application: PCT/JP2006/306015 WO 20060324
- International Announcement: WO2006/101206 WO 20060928
- Main IPC: C10M119/02
- IPC: C10M119/02 ; C08F10/06
Abstract:
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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