Azeotrope-like compositions of difluoromethane and trifluoroiodomethane

• US 8,163,689 B2
• Filed: 12/15/2008
• Issued: 04/24/2012
• 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:
  US12/335,335
• Publication Number:
  US 20090092556A1
• Time in Patent Office: 1,226 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 from about 85 to about 99 weight percent HFC-32 and from about 1 to about 15 weight percent CF₃I.

2. The azeotrope-like composition of claim 1 which consists essentially of from about 85 to about 99 weight percent HFC-32 and from about 1 to about 15 weight percent of CF₃I.

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

55°

C. to about −

51°

C. at a pressure of about 14.51 psia.

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

55°

C. to about −

52°

C. at a pressure of about 14.51 psia.

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

54°

C. to about −

53°

C. at a pressure of about 14.51 psia.

6. The azeotrope-like composition of claim 2 having a boiling point of from about −

55°

C. to about −

51°

C. at a pressure of about 14.51 psia.

7. 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.

8. A heat transfer composition comprising the composition of claim 1.

9. The heat transfer composition of claim 8 further comprising 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. The heat transfer composition of claim 9 wherein said lubricant is 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) (PAOs), and combinations of these.

11. The heat transfer composition of claim 10 wherein said adjuvant includes at least one compatibilizer.

12. The heat transfer composition of claim 11 comprising from about 0.5 to about 5 percent by weight of said at least one compatibilizer.

13. The heat transfer composition of claim 9 wherein said lubricant(s) together are present in an amount of from about 5 to about 50 percent by weight of the heat transfer composition.

14. The heat transfer composition of claim 9 wherein said adjuvant includes one or more flame suppressants.

15. The heat transfer composition of claim 14 wherein said one or more flame suppressant(s) together are present in an amount of from about 0.5% to about 15% by weight of the heat transfer composition.

16. The heat transfer composition of claim 8 comprising at least about 50% by weight of said azeotrope-like composition of claim 1.

17. The heat transfer composition of claim 10, wherein the lubricant is a polyol ester.