Patent ID: 9157017
Filing Date: 2015-10-13
Classification: A01N,A23L,A23V,A61K,A61L,A62D,B01J,C07C,C08J,C09D,C09K,C11B,C11D,Y02A

Abstract:
1. A method for producing an automobile air conditioning system for use with 2,3,3,3-tetrafluoropropene (HFO-1234yf) comprising: (a) providing an automobile vapor compression air conditioning system usable with refrigerant 1,1,1,2-tetrafluoroethane (HFC-134a) and having at least one compressor and at least one condenser; and (b) providing a heat transfer composition in said system, said heat transfer composition consisting essentially of: (i) at least about 50% by weight of a low toxicity refrigerant suitable for use in automobile air conditioning systems, said refrigerant consisting essentially of HFO-1234yf; and (ii) lubricant consisting essentially of polyalkylene glycol(s), and wherein (1) said condenser is operable with said refrigerant in a temperature range that includes 150° F. and (2) said system when operating at a condenser temperature of 150° F. achieves a capacity relative to HFC-134a of about 1 and a Coefficient of Performance (COP) relative to HFC-134a of about 1.