| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerant composition being an azeotropic refrigerant mixture comprising 1,1,1,2-tetrafluoroethane and isobutane and having a boiling point substantially equal to that of a regulated refrigerant, CFC 12 or CFC 500. SOLUTION: This refrigerant composition is obtained by forming an azeotropic mixture comprising 88-71wt.% 1,1,1,2-tetrafluoroethane and 12-29wt.% isobutanc. |
