Heat transfer fluid

Abstract

Compositions which are based on tetrafluoropropene and more particularly relates to compositions inclduing 60% to 90% by weight of 2,3,3,3-tetrafluoropropene and 10% to 40% by weight of at least one compound selected from difluoroethane and difluoromethane, which can be used as a heat transfer fluid. The compositions may include 60% to 79% by weight of 2,3,3,3-tetrafluoropropene and 21% to 40% by weight of a compound selected from difluoroethane and difluoromethane.

1 - 12 . (canceled) 
     
     
         13 . A heat transfer fluid comprising:
 60% to 90% by weight of 2,3,3,3-tetrafluoropropene; and   10% to 40% by weight of a mixture of difluoromethane and 1,1-difluoroethane.   
     
     
         14 . The heat transfer fluid of  claim 13  comprising:
 60% to 79% by weight of 2,3,3,3-tetrafluoropropene; and 
 21% to 40% by weight of a mixture of difluoromethane and 1,1-difluoroethane. 
 
     
     
         15 . The heat transfer fluid of  claim 13  comprising:
 60% to 70% by weight of 2,3,3,3-tetrafluoropropene; and 
 30% to 40% by weight of a mixture of difluoromethane and 1,1-difluoroethane. 
 
     
     
         16 . The heat transfer fluid of  claim 13  comprising:
 60% to 65% by weight of 2,3,3,3-tetrafluoropropene; and 
 35% to 40% by weight of a mixture of difluoromethane and 1,1-difluoroethane. 
 
     
     
         17 . A composition comprising the heat transfer fluid of  claim 13  and a stabilizer selected from the group consisting of nitromethane, ascorbic acid, terephthalic acid, azoles, phenolic compounds, epoxides, phosphites, phosphates, phosphonates, thiols and lactones. 
     
     
         18 . The composition of  claim 17 , wherein the stabilizer represents at most 5% by weight relative to the heat transfer fluid. 
     
     
         19 . A composition comprising the heat transfer fluid of  claim 13  and a lubricant selected from the group consisting of mineral oil, alkylbenzene, polyalkylene glycol and polyvinyl ether. 
     
     
         20 . A composition comprising the heat transfer fluid of  claim 16  and a stabilizer selected from the group consisting of nitromethane, ascorbic acid, terephthalic acid, azoles, phenolic compounds, epoxides, phosphites, phosphates, phosphonates, thiols and lactones. 
     
     
         21 . The composition of  claim 20 , wherein the stabilizer represents at most 5% by weight relative to the heat transfer fluid. 
     
     
         22 . A composition comprising the heat transfer fluid of  claim 16  and a lubricant selected from the group consisting of mineral oil, alkylbenzene, polyalkylene glycol and polyvinyl ether. 
     
     
         23 . The heat transfer fluid of  claim 16  consisting of:
 60% to 65% by weight of 2,3,3,3-tetrafluoropropene; and 
 35% to 40% by weight of a mixture of difluoromethane and 1,1-difluoroethane. 
 
     
     
         24 . A heat transfer fluid comprising:
 60% to 80% by weight of 2,3,3,3-tetrafluoropropene;   5% to 35% by weight of difluoromethane; and   5% to 20% by weight of 1,1-difluoroethane,   
       wherein the total amount of difluoromethane and 1,1-difluoroethane is 15% to 40% by weight of the composition. 
     
     
         25 . The heat transfer fluid of  claim 24  comprising:
 60% to 80% by weight of 2,3,3,3-tetrafluoropropene; 
 10% to 25% by weight of difluoromethane; 
 5% to 20% by weight of 1,1-difluoroethane; and 
 optionally a stabilizer. 
 
     
     
         26 . A composition comprising the heat transfer fluid of  claim 24  and a stabilizer selected from the group consisting of nitromethane, ascorbic acid, terephthalic acid, azoles, phenolic compounds, epoxides, phosphites, phosphates, phosphonates, thiols and lactones. 
     
     
         27 . The composition of  claim 26 , wherein the stabilizer represents at most 5% by weight relative to the heat transfer fluid. 
     
     
         28 . A composition comprising the heat transfer fluid of  claim 24  and a lubricant selected from the group consisting of mineral oil, alkylbenzene, polyalkylene glycol and polyvinyl ether.