US 2003/0111636 A1 · REFRIGERANT MIXTURE COMPRISING DIFLUROMETHANE, PENTAFLUROETHANE AND 1,1,1-TRIFLUOROETHANE

Abstract

A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of pentafluoroethane (CHF2CF3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH3CF3, HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), isobutane (CH(CH3)2CH3, R-600a), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).

Claims11

Dependent claims

A refrigerant composition useful as a substitute for chlorodifluoromethane, comprising:

a first constituent of difluoromethane;
a second constituent of pentafluoroethane;
a third constituent of 1,1,1-trifluoroethane;
a fourth constituent selected from the group consisting of cyclopropane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1,2,2-pentafluoropropane, isobutane, octafluorocyclobutane, 1,1,1,2,3,3-hexafluoropropane, butane, bis(difluoromethyl)ether and pentafluoroethylmethylether.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/339,211Filed 9 Jan 2003

Priority

KR 49666/199910 Nov 1999

Published

19 Jun 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C09K 5/045
Comprising halogenated compounds: containing only fluorine as halogen
C09K 2205/112
Ethers: halogenated ethers
C09K 2205/12
Components: hydrocarbons
C09K 2205/22
Aspects relating to compounds used in compression type refrigeration systems: all components of a mixture being fluoro compounds

Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane

Life of this patent

Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane

Life of this patent

Abstract

Claims11