Hydraulic fluid composition
US-2015376541-A1 · Dec 31, 2015 · US
Lubricant oil composition
US9404062B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9404062-B2 |
| Application number | US-201013375122-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 11, 2010 |
| Priority date | Jun 4, 2009 |
| Publication date | Aug 2, 2016 |
| Grant date | Aug 2, 2016 |
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Abstract
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The invention provides a lubricating oil composition comprising a lubricating base oil with a kinematic viscosity at 100° C. of 1-10 mm 2 /s, a % C p ; of 70 or greater and a % C A of no greater than 2 and a viscosity index improver having a weight-average molecular weight of 100,000 or greater and a ratio of weight-average molecular weight to PSSI of 1.0×10 4 or greater, at 0.1-50% by mass based on the total amount of the composition, and having a kinematic viscosity at 100° C. of 9.0-12.5 mm 2 /s and a HTHS viscosity at 150° C. of 2.8 mPa·s or greater. It further provides a lubricating oil composition comprising a lubricating base oil with a kinematic viscosity at 100° C. of 1-6 mm 2 /s, a % C p of 70 or greater and a % C A of no greater than 2, a hydrocarbon-based viscosity index improver with a PSSI of no greater than 20, and a poly(meth)acrylate-based viscosity index improver.
First claim
Opening claim text (preview).
The invention claimed is: 1. A lubricating oil composition having a kinematic viscosity at 100° C. of 9.0-12.5 mm 2 /s, a HTHS viscosity at 150° C. of 2.8 mPa·s or greater, and a ratio of the HTHS viscosity at 150° C. to the HTHS viscosity at 100° C. being 0.50 or greater, and comprising: a lubricating base oil with a kinematic viscosity at 100° C. of 1-10 mm 2 /s, a % C p of 70 or greater, and a % C A of no greater than 2 and a viscosity index improver having a weight-average molecular weight of 300,000 or greater and a ratio of weight-average molecular weight to PSSI of 1.0×10 4 or greater, at 0.1-50% by mass based on the total amount of the composition.
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Classifications
Diesel engines · CPC title
- C10M169/041Primary
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- What does patent US9404062B2 cover?
- The invention provides a lubricating oil composition comprising a lubricating base oil with a kinematic viscosity at 100° C. of 1-10 mm 2 /s, a % C p ; of 70 or greater and a % C A of no greater than 2 and a viscosity index improver having a weight-average molecular weight of 100,000 or greater and a ratio of weight-average molecular weight to PSSI of 1.0×10 4 or greater, at 0.1-50% by mass b…
- Who is the assignee on this patent?
- Yaguchi Akira, Matsui Shigeki, Tsujimoto Teppei, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C10M169/041. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 02 2016 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).