WORKING FLUID COMPOSITION FOR REFRIGERATOR REFRIGERATION OIL AND METHOD FOR PRODUCING SAME

摘要

This working fluid composition for a refrigerator comprises: a refrigeration oil having a kinematic viscosity at 100°C of 2-50 mm2/s and including as a base oil a complex ester having an acid value of 0.5 mgKOH/g or less and obtained by further esterifying with at least one type of compound selected from C1-20 monovalent alcohols and C2-20 fatty acids an ester intermediate obtained by reacting a neopentylpolyol and a dibasic acid; and a C2-4 hydrocarbon refrigerant.