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US 12,173,220 B2Granted
Heat transfer composition
AssigneeDaikin Industries, Ltd.
InventorsTomoyuki Gotou, Yuuki Yotsumoto
Life of this patent
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Abstract
Provided is a heat transfer composition comprising at least one iodocarbon compound and a refrigeration oil, and having a turbidity of 100 degrees or less as measured in accordance with JIS K0101 after stability testing. Also provided is a heat transfer composition comprising at least one iodocarbon compound and a refrigeration oil in which no hydrogen atom is bonded to a carbon atom or silicon atom in a main chain skeleton. These heat transfer compositions have significantly improved stability and are prevented from discoloration due to deterioration over time.
Claims9
A heat transfer composition comprising:
- (i) at least one C1-3 iodofluorocarbon compound;
- and
- (ii) a refrigeration oil;
- wherein the refrigerant oil comprises a base oil, and the base oil comprises 50 mass % or more of (ii-a) a fluorine oil and/or (ii-b) a silicone oil in which no hydrogen atom is bonded to a carbon atom or a silicon atom in a main chain skeleton,
- wherein (ii-a) the fluorine oil does not have a structure represented by —CH2—CH2—, and
- wherein (ii-a) the fluorine oil is represented by formula (1):
- R2—(O—R1)n—R3 (1),
- wherein R1 is a fluorine-containing alkylene group, R2 and R3 are (fluoro)alkyl groups, and n is an integer of 10 to 200, and
- wherein a kinematic viscosity of (ii-a) the fluorine oil is 5 to 400 cSt at 40° C.
6 more elements
Dependencies are inferred from the claim text.