| 摘要 |
PROBLEM TO BE SOLVED: To obtain a refrigerating machine oil composition for a natural refrigerant, having excellent compatibility with natural refrigerant especially with ammonia refrigerant. SOLUTION: This composition includes 5-1,000 ppm sulfur derived from a mineral oil ingredient (B) by adding the mineral oil ingredient (B) containing sulfur to a base oil component (A) comprising a polyether compound having <=-10 deg.C pour point at a weight ratio (A):(B) of (25:75) to (99:1). |
