Idemitsu Kosan Company, Limited

So Nakajima

Yukio Yoshida

Tomoya Matsumoto

Tetsuhiko Fukanuma

Masato Kaneko

Ryo Matsubara

Yuki Yokoi

Tomoya Ushiyama

A polyalkylene glycol-based compound of formula (1): may be one in which Ris a monovalent hydrocarbon group having 1 to 32 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms, a monovalent acyl group having 2 to 32 carbon atoms, or a monovalent oxygen-containing hydrocarbon group having 2 to 32 carbon atoms; Ris a monovalent hydrocarbon group having 1 to 32 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms, a monovalent acyl group having 2 to 32 carbon atoms, a monovalent oxygen-containing hydrocarbon group having 2 to 32 carbon atoms, or a hydrogen atom; Ris a divalent hydrocarbon group having 4 carbon atoms; Ris a divalent hydrocarbon group having 2 or 3 carbon atoms; m and n are respectively numbers between 1 and 40 and 0 and 20; and m/(m+n)≥0.5.

Polyalkylene glycol compound

A polyalkylene glycol-based compound may have formula (1): wherein Ris a monovalent aromatic hydrocarbon group having 6 to 42 ring carbon atoms; Ris a monovalent aromatic hydrocarbon group having 6 to 42 carbon atoms or a hydrogen atom; Ris a divalent hydrocarbon group having 2 to 4 carbon atoms; and m is a number in a range of from 1 to 40.

Polyalkylene glycol-based compound

A lubricating oil composition excellent in the wear resistance and a refrigerator oil composition excellent in the oxidation stability using the lubricating oil composition are provided by a lubricating oil composition containing a base oil (A) and a phosphine derivative (B) having one or more oxygen atom in a molecule.

Lubricating oil composition and composition for refrigerator

The present invention relates to a refrigerator oil containing a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof in an amount of 30 mol % or more and 100 mol % or less on a basis of 100 mol % of the whole amount of structural units excluding a terminal structural unit in a molecular structure thereof, a refrigerator oil composition containing the refrigerator oil, and a production method of the refrigerator oil.

Refrigerating machine oil, and composition for refrigerating machine

The present invention relates to a refrigerator oil containing a specified amount of a polyvinyl ether-based compound (A) containing a structural unit (a1) having a methoxy group in a side chain thereof and a specified amount of a polyvinyl ether-based compound (B) containing a structural unit (b2) of a specified structure; a refrigerator oil composition containing the refrigerator oil; and a production method the refrigerator oil.

The lubricating oil composition for a refrigerator of the present invention is used with a refrigerant containing carbon dioxide, and contains a base oil (A) containing a polyoxyalkylene glycol as a major component, and an alcohol (B) having at least one hydroxy group, in which a total number of the hydroxy group and an ether bond is from 2 to 3 (provided that the number of an ether bond may be 0).

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Edogawa-ku, Japan

So Nakajima