| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to refrigerator hydraulic fluid composition, characterised by that it contains refrigerator oil which contains an ester of at least one polyatomic alcohol selected from pentaerythritol and dipentaerythritol, and a fatty acid containing 50-100 mol % C5-C9 fatty acid, at least 30 mol % C5-C9 branched fatty acid and not more than 40 mol % C5 or lower fatty acid with a straight chain, where content of the ester is at least 80 wt % per total weight of the refrigerator oil, and fluoropropene coolant and/or trifluoroiodomethane coolant. The invention also relates to refrigerator oil which is characterised by that it contains said ester and fluoropropene coolant and/or trifluoroiodomethane coolant. ^ EFFECT: refrigerator oil and refrigerator hydraulic fluid composition which can attain a high level of compatibility with both the coolant and thermal and chemical stability in refrigerators. ^ 7 cl, 3 tbl, 6 ex |
