A METHOD OR REDUCING WEAR OF METAL SURFACES AND MAINTAINING A HYDROLYTICALLY STABLE ENVIRONMENT IN REFRIGERATION EQUIPMENT DURING THE OPERATION OF SUCH EQUIPMENT

摘要

A method of improving wear of metal surfaces and maintaining a hydrolytically stable environment in refrigeration equipment during the operation of the equipment. The method involves contacting the metal surfaces with an ester lubricant base stock comprising blends or esters of neopentyl glycol and 2-ethylhexanoic acid and neopentyl glycol and at least one straight chain acid of four to ten carbon atoms and having a viscosity of about ISO 7-10. The lubricant can also be used in a working fluid with a chlorine-free fluoro-group heat transfer fluid such as 1,1,1,2-tetrafluoroethane.