POLYOL ESTER LUBRICANTS FOR HERMETICALLY SEALED REFRIGERATING COMPRESSORS

摘要

A high quality lubricant for hermetically sealed domestic air conditioner an d refrigerator compressors, especially those us- ing chlorine free hydrofluorocarbon refrigerant working fluids, is provided by mixed esters of hindered polyols, most desirably pentaerythritol, with a mixture of carboxylic acids including at least some isopentanoic acid along with either or both of iso-nona- noic acid and dibasic acids such as adipic.