Azeotrope-like compositions of difluoromethane and trifluoroiodomethane

• US 8,492,327 B2
• Filed: 04/23/2012
• Issued: 07/23/2013
• Est. Priority Date: 04/16/2004
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Singh, Rajiv R., Pham, Hang T., Wilson, David P.
• Primary Examiner(s): WEBB, GREGORY E
• Application Number:
  US13/453,560
• Publication Number:
  US 20120204594A1
• Time in Patent Office: 456 Days
• Field of Search: 510/408, 510/412, 510/415, 252/67, 252/68
• US Class Current: 510/408
• CPC Class Codes: C08J 2205/052 Closed cells, i.e. more than 50% of the pores are closed
• CPC Class Codes: C08J 2207/04 Aerosol, e.g. polyurethane foam spray
• CPC Class Codes: C08J 9/146 only fluorine as halogen atoms
• CPC Class Codes: C09K 2205/122 Halogenated hydrocarbons
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 3/30 for aerosols aerosol containers B65D83/14
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen
• CPC Class Codes: C11D 7/5063 Halogenated hydrocarbons containing heteroatoms, e.g. fluoro alcohols

Abstract

Provided are azeotrope-like compositions comprising difluoromethane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.

Claims

1. An azeotrope-like composition comprising effective amounts of difluoromethane (“

HFC-32”

) and CF₃I, and an effective amount of a stabilizer comprising at least one of diene-based compounds, aromatic epoxides, and combinations of two or more thereof.

2. The azeotrope-like composition of claim 1 comprising from about 67 to less than 100 weight percent HFC-32 and from greater than zero to about 33 weight percent of CF₃I.

3. The azeotrope-like composition of claim 1 comprising from about 73 to about 99 weight percent HFC-32 and from about 1 to about 27 weight percent of CF₃I.

4. The azeotrope-like composition of claim 1 comprising from about 85 to about 99 weight percent HFC-32 and from about 1 to about 15 weight percent of CF₃I.

5. The azeotrope-like composition of claim 1 having a boiling point of from −

55°

C. to −

51°

C. at a pressure of 14.51 psia.

6. The azeotrope-like composition of claim 1, wherein the stabilizer is a diene-based compound.

7. The azeotrope-like composition of claim 1, wherein the stabilizer is a terpene.

8. The azeotrope-like composition of claim 1 comprising from about 0.001 to about 10 weight percent of stabilizer as based upon the weight of CF₃I in the composition.

9. A composition comprising the composition of claim 1 and at least one adjuvant selected from the group consisting of lubricants, compatibilizers, surfactants, flame suppressants, solubilizing agents, dispersing agents, cell stabilizers, cosmetics, polishing agents, medicaments, cleaners, fire retarding agents, colorants, chemical sterilants, stabilizers, polyols, polyol premix components and combinations of two or more of these.

10. A heat transfer composition comprising an azeotrope-like composition of claim 1.

11. A heat transfer composition comprising an azeotrope-like composition of claim 4.

12. The heat transfer composition of claim 9 comprising at least 50% by weight of the composition of claim 1.

13. A heat transfer composition comprising the composition of claim 6 and wherein said adjuvant comprises at least one lubricant, preferably selected from the group consisting of mineral oil, silicone oil, polyalkyl benzenes (PABs), polyol esters (POEs), polyalkylene glycols (PAGs), polyalkylene glycol esters (PAG esters), polyvinyl ethers (PVEs), poly(alpha-olefins), and combinations of these.

14. The heat transfer composition of claim 9, further comprising one or more co-refrigerants selected from the group consisting of CFC-11, CFC-12, HFC-125, HFC-134, HFC-134a, HFC-152a, HFC-227ea, HFC-236fa, HFC-245fa, HFC-365mfc, water and CO₂.

15. A refrigeration system comprising the heat transfer composition of claim 9, said refrigeration system selected from the group consisting of automotive air conditioning systems, residential air conditioning systems, commercial air conditioning systems, residential refrigerator systems, residential freezer systems, commercial refrigerator systems, commercial freezer systems, chiller air conditioning systems, chiller refrigeration systems, heat pump systems, and combinations of two or more of these.

16. The refrigeration system of claim 15, which is a stationary air-conditioning system.

17. The refrigeration system of claim 15, which is operable with refrigerant R-410A or which was originally designed for use with R-410A.

18. The composition of claim 1, which has a Global Warming Potential (GWP) of not greater than 1000.

19. The composition of claim 1, which has a Global Warming Potential (GWP) of less than about 500.

20. The composition of claim 1, which has a Global Warming Potential (GWP) of less than about 150.