Functional fluids comprising alkyl toluene sulfonates
US-2015368581-A1 · Dec 24, 2015 · US
Friction modifier composition for lubricants
US9994789B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9994789-B2 |
| Application number | US-201715432496-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 14, 2017 |
| Priority date | Mar 13, 2012 |
| Publication date | Jun 12, 2018 |
| Grant date | Jun 12, 2018 |
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Abstract
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Combining a metal based friction modifier, such as a molybdenum dialkyldithiocarbamate, and certain esters of hydroxy carboxylic acids, such as short chain alkyl esters of citric or tartaric acid, e.g., tributyl citrate, has a synergistic effect on lowering the friction coefficient of lubricating oils allowing one to reduce the amount of metal based friction modifier needed to adequately formulate a lubricant with low friction characteristics.
First claim
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What is claimed is: 1. A lubricant composition comprising: A) 70 wt % or more of a petroleum based automotive motor lubricating oil, and B) 3 wt % of a mixture of i) a metal based friction modifier selected from the group of molybdenum dialkyldithiocarbamates, and ii) from a hydroxy carboxylic ester selected from the group consisting of triethyl citrate, tripropyl citrate and tributyl citrate; in a weight ratio of i) to ii) of about 1:3. 2. The lubricant composition according to claim 1 further comprising one or more additional lubricant additive selected from the group consisting of dispersants, detergents, corrosion/rust inhibitors, antioxidants, anti-wear agents, anti-foamants, friction modifiers, seal swell agents, demulsifiers, V.I. improvers and pour point depressants. 3. The lubricant composition according to claim 1 wherein the petroleum based automotive motor lubricating oil is present at about 90 wt % or more.
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Internal-combustion engines · CPC title
used as base material · CPC title
Thiocarbamate metal salts · CPC title
Viscosity; Viscosity index · CPC title
containing free hydroxy groups · CPC title
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- What does patent US9994789B2 cover?
- Combining a metal based friction modifier, such as a molybdenum dialkyldithiocarbamate, and certain esters of hydroxy carboxylic acids, such as short chain alkyl esters of citric or tartaric acid, e.g., tributyl citrate, has a synergistic effect on lowering the friction coefficient of lubricating oils allowing one to reduce the amount of metal based friction modifier needed to adequately formul…
- Who is the assignee on this patent?
- Chemtura Corp, Lanxess Solutions Us Inc
- What technology area does this patent fall under?
- Primary CPC classification C10M141/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 12 2018 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).