| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerant oil and a hydraulic fluid composition for refrigerating machine which can achieve a solvent compatibility in high level in a refrigerating system using fluoropropene as a refrigerant. <P>SOLUTION: The refrigerant comprises a polyvinyl ether which has a structural unit represented by general formula (1), and has a carbon/oxygen molar ratio of 4.0-5.8, and is used with fluoropropene refrigerant. The hydraulic fluid composition for refrigerating machine comprises the polyvinyl ether and fluoropropene refrigerant. R<SP>1</SP>, R<SP>2</SP>and R<SP>3</SP>are each, in the formula (1), a hydrogen atom or a 1-8C hydrocarbon group, R<SP>4</SP>is a 1-10C divalent hydrocarbon group or a 2-20C divalent hydrocarbon group containing oxygen of an ether bonding, R<SP>5</SP>is a 1-20C hydrocarbon group and m is an average number relating to the polyvinyl ether and is a number of 0 to 10. <P>COPYRIGHT: (C)2009,JPO&INPIT |
