| 摘要 |
<p>A lubricating oil for a refrigerator, characterized as comprising (a) at least one ester represented by general formula (1) wherein R1 represents a C¿1? to C18 linear alkyl or a C3 to C18 branched alkyl, R?2¿ represents H, a C¿1? to C18 linear alkyl or a C3 to C18 branched alkyl, with the proviso that the total number of carbons contained in the alkyls represented by R?1 and R2¿ is 2 to 18 and that when R2 is H, R1 represents a branched alkyl, and R3 represents a C¿1? to C20 linear alkyl, a C3 to C20 branched alkyl or a C3 to C10 cycloalkyl, and optionally (b) at least one compound selected from the group consisting of an aliphatic polyol ester, a phthalic acid ester, an aliphatic dicarboxylic acid ester, a polyvinyl ether, a hydrocarbon oil and a polyalkylene glycol; a method for lubricating a refrigerator using the lubricating oil; and a hydraulic fluid composition comprising (I) the component (a) or the components (a) and (b), and (II) a coolant.</p> |
