POLYOL ESTER LUBRICANTS FOR REFRIGERANT HEAT TRANSIER FLUIDS FOR COOLING HEAT TRANSFER FLUIDS

摘要

A variety of specific esters and esters of polyhydric alcohols, especially of pentaerythritol, are particularly useful lubricants for cooling heat transfer fluids containing chlorine and fluorine groups, particularly those in which coolant 134a (1,1,1,2-tetrafluoroethane) is preferred Do.