abstract |
PURPOSE: To obtain the subject lubricating oil, composed of a mixed ester of an aliphatic polyol with a fatty acid and aliphatic dibasic acid, etc., excellent in compatibility with 1,1,1,2-tetrafluoroethane refrigerant and having a high viscosity. n CONSTITUTION: The objective lubricating oil, composed of a mixed ester of (A) an aliphatic polyol such as trimethylolpropane or pentaerythritol with (B) (i) a 3-9C (preferably 5-7C) fatty acid and (ii) an aliphatic or aromatic dibasic acid and having a viscosity within the range of 2-16mm 2 /s at 100°C. n COPYRIGHT: (C)1991,JPO&Japio |