Adeka Corporation

Yukiya Moriizumi

Yukio Tatsumi

Kenji Yamamoto

Shinji Iino

Kazuhiro Umehara

The present invention relates to a lubricant composition including a molybdenum dithiocarbamate (A) represented by the general formula (1) and a copolymer (B) that includes, as essential constitutional units, a unit (a) represented by the general formula (2) and a unit (b) represented by the general formula (3), has a weight-average molecular weight of from 5,000 to 150,000, and has a composition ratio of the unit (a) to the unit (b), i.e., (a)/(b), of from 50/50 to 90/10 by mole, and a lubricant oil composition including same.

Lubricant composition and lubricant oil composition containing same

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.  

Lubricating oil additive composition and method for improving storage stability of lubricating oil additive composition

A lubricating oil additive capable of providing an antioxidant which enables a lubricating oil composition to have long drain intervals, while reducing specific components such as metals and phosphorus atoms, and a lubricating oil composition containing the lubricating oil additive are provided. A phosphorus molybdenum compound represented by the following general formula (1) where R, R, and Reach independently represent a hydrocarbon group having 1 to 20 carbon atoms is also provided.

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Tokyo, Japan

Yukiya Moriizumi