Lubricant oil composition
US-2015368582-A1 · Dec 24, 2015 · US
Lubricant composition
US9637703B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9637703-B2 |
| Application number | US-201013520722-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 27, 2010 |
| Priority date | Jan 7, 2010 |
| Publication date | May 2, 2017 |
| Grant date | May 2, 2017 |
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Abstract
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The lubricating oil composition of the invention comprises a lubricating base oil with a 100° C. kinematic viscosity of 1-20 mm 2 /s, (A) a friction modifier, (B) a first overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal borate, and (C) an overbased second oil-soluble metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal carbonate.
First claim
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The invention claimed is: 1. A lubricating oil composition comprising: a lubricating base oil with a 100° C. kinematic viscosity of 1-20 mm 2 /s, molybdenum dithiocarbamate (MoDTC) in an amount of 0.03-0.1% by mass in terms of molybdenum element and based on the total mass of the lubricating oil composition, a first overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal borate in an amount of 0.05-5% by mass based on the total mass of the lubricating oil composition, a second overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal carbonate in an amount of 0.05-2.2% by mass based on the total mass of the lubricating oil composition, and 3-20% by mass based on the total mass of the lubricating composition of a poly(meth)acrylate-based viscosity index improver with a PSSI of no greater than 35 and a ratio between the molecular weight and PSSI (Mw/PSSI) of 1×10 4 or greater; wherein the total of the metal content from the first overbased metal salt and from the second overbased metal salt in the lubricating oil composition is 0.1 to 0.3% by mass. 2. A lubricating oil composition according to claim 1 , wherein the first overbased metal salt is an overbased alkaline earth metal salicylate obtained by overbasing an alkaline earth metal salicylate with an alkaline earth metal borate.
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Classifications
Viscosity; Viscosity index · CPC title
Pour-point; Viscosity index · CPC title
Internal-combustion engines · CPC title
Molecular weight; Molecular weight distribution · CPC title
used as base material · CPC title
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- What does patent US9637703B2 cover?
- The lubricating oil composition of the invention comprises a lubricating base oil with a 100° C. kinematic viscosity of 1-20 mm 2 /s, (A) a friction modifier, (B) a first overbased metal salt obtained by overbasing an oil-soluble metal salt with an alkaline earth metal borate, and (C) an overbased second oil-soluble metal salt obtained by overbasing an oil-soluble metal salt with an alkaline ea…
- Who is the assignee on this patent?
- Matsui Shigeki, Yaguchi Akira, Mutou Akio, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C10M163/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 02 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).