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Lubricating oil additive composition and method for improving storage stability of lubricating oil additive composition
US9255237B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9255237-B2 |
| Application number | US-201214113659-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 24, 2012 |
| Priority date | Apr 25, 2011 |
| Publication date | Feb 9, 2016 |
| Grant date | Feb 9, 2016 |
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Abstract
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The purpose of the present invention is to provide a thiodicarboxylic acid ester which has high long-term storage stability without inhibiting antioxidant properties and wear-resistant properties of the thiodicarboxylic acid ester. In order to achieve the above-mentioned purpose, the present invention provides a lubricating oil additive composition which is characterized by containing a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2) and by having an acid value of 0.01-0.4 mgKOH/g. (in the formula, R 1 and R 4 each independently represent a hydrocarbon group having 6 to 18 carbon atoms and R 2 and R 3 each independently represent an alkylene group having 1 to 4 carbon atoms) (in the formula, R 5 represents a hydrocarbon group having 6 to 18 carbon atoms and R 6 and R 7 each independently represent an alkylene group having 1 to 4 carbon atoms).
First claim
Opening claim text (preview).
The invention claimed is: 1. A lubricating oil additive composition consisting of: a compound (A) represented by formula (1), wherein R 1 and R 4 each independently represent a hydrocarbon group having 6 to 18 carbon atoms, and R 2 and R 3 each independently represent an alkylene group having 1 to 4 carbon atoms, and a compound (B) represented by formula (2), wherein R 5 represents a hydrocarbon group having 6 to 18 carbon atoms, and R 6 and R 7 each independently represent an alkylene group having 1 to 4 carbon atoms, and having an acid value of 0.01 to 0.4 mgKOH/g. 2. The lubricating oil additive composition according to claim 1 , wherein each of R 2 , R 3 , R 6 , and R 7 is an ethylene group and R 1 , R 4 , and R 5 are the same group. 3. The lubricating oil additive composition according to claim 1 , wherein the acid value is from 0.01 to 0.3 mgKOH/g. 4. A method for improving the storage stability of a lubricating oil additive composition comprising: adjusting an acid value of a lubricating additive composition consisting of: a compound (A) represented by formula (1), wherein R 1 and R 4 each independently represent a hydrocarbon group having 6 to 18 carbon atoms, and R 2 and R 3 each independently represent an alkylene group having 1 to 4 carbon atoms, and a compound (B) represented by formula (2), wherein R 5 represents a hydrocarbon group having 6 to 18 carbon atoms, and R 6 and R 7 each independently represent an alkylene group having 1 to 4 carbon atoms, to 0.01 to 0.4 mgKOH/g. 5. The lubricating oil additive composition according to claim 2 , wherein the acid value is from 0.01 to 0.3 mgKOH/g.
Assignees
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Classifications
Soluble oils · CPC title
containing carboxyl groups; Derivatives thereof · CPC title
- C10M135/26Primary
containing carboxyl groups; Derivatives thereof · CPC title
- C10M135/06Primary
Esters, e.g. fats · CPC title
Internal-combustion engines · CPC title
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Frequently asked questions
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- What does patent US9255237B2 cover?
- The purpose of the present invention is to provide a thiodicarboxylic acid ester which has high long-term storage stability without inhibiting antioxidant properties and wear-resistant properties of the thiodicarboxylic acid ester. In order to achieve the above-mentioned purpose, the present invention provides a lubricating oil additive composition which is characterized by containing a c…
- Who is the assignee on this patent?
- Tatsumi Yukio, Moriizumi Yukiya, Iino Shinji, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C10M135/26. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 09 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).