| 摘要 |
PURPOSE:To improve abrasive characteristics and to decrease abrasive wear by incorporating both a phosphoric acid compd. and a sulfur-contg. iron compd. in a base oil of a lubricant for a compression refrigerator wherein a hydrofluorocarbon is used as a refrigerant. CONSTITUTION:A phosphoric acid extreme-pressure agent (e.g. a compd. of the formula) and a sulfur-contg. iron compd. (e.g. iron sulfide) are added into a lubricant base oil (e.g. polyalkylnene glycol) to prepare a lubricant, which is used as a lubricant for a compression refrigerator wherein a hydrofluorocarbon which is chlorine-free refrigerant is used. As the sulfur-contg. iron compd. is incorporated in the lubricant base oil, when a condition reaches the extreme pressure condition, a sulfur compd. is formed on the abrasive face and a synergistic effect based on the use of the phosphoric acid extreme-pressure agent is exhibited to make it possible to improve the wear resistance of the abrasive face even though there is no incorporation of chlorine in the refrigerant. |
