Azeotrope-like compositions of difluoromethane and trifluoroiodomethane

• US 7,479,477 B2
• Filed: 04/18/2005
• Issued: 01/20/2009
• 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:
  US11/109,195
• Publication Number:
  US 20060033071A1
• Time in Patent Office: 1,373 Days
• Field of Search: 510/408, 203/67
• US Class Current: 510/408
• CPC Class Codes: C08J 2201/03 Extrusion of the foamable blend
• CPC Class Codes: C08J 2203/142 Halogenated saturated hydrocarbons, e.g. H3C-CF3
• CPC Class Codes: C08J 2203/144 Perhalogenated saturated hydrocarbons, e.g. F3C-CF3
• CPC Class Codes: C08J 2203/182 of physical blowing agents, e.g. acetone and butane
• 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 2300/22 Thermoplastic resins
• CPC Class Codes: C08J 2300/24 Thermosetting resins
• CPC Class Codes: C08J 2323/06 Polyethene
• CPC Class Codes: C08J 2323/12 Polypropene
• CPC Class Codes: C08J 2325/06 Polystyrene
• CPC Class Codes: C08J 2361/04 Condensation polymers of aldehydes or ketones with phenols only
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/146 only fluorine as halogen atoms
• CPC Class Codes: C08J 9/147 containing carbon and halogen atoms only
• CPC Class Codes: C09K 2205/122 Halogenated 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: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2207/042 : Epoxides
• CPC Class Codes: C10N 2020/101 : Containing Hydrofluorocarbons
• 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. A refrigeration system comprising a heat transfer composition, said composition comprises at least about 50% by weight of an azeotrope-like composition comprising effective amounts of HFC-32 and CF₃I.

2. A refrigeration system of claim 1 selected from 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.