Stabilized hydrochlorofluoroolefins and hydrofluoroolefins
Disclosed is a combination of hydrofluoroolefins and/or hydrochlorofluoroolefins with stabilizers wherein the stabilizers minimize the degradation of the hydrofluoroolefins and hydrochlorofluoroolefins during storage, handling and use yet allow for atmospheric degradation. The combinations exhibit low or zero ozone depletion potential and lower global warming potential making them of interest as replacements for chlorofluorocarbons and hydrfluorocarbons. The combinations of the present invention comprise hydrofluoroolefins and/or hydrochlorofluoroolefins in combination with a stabilizer or stabilizers selected from free radical scavengers, acid scavengers, oxygen scavengers, polymerization inhibitors and combinations thereof.
1. A combination comprising a polyol and the hydrofluoroolefin HFO-1234ze and/or the hydrochlorofluoroolefin 1233zd and a stabilizer selected from the group consisting of d,1-limonene, d,1-limonene oxide, epoxbutane and combinations thereof wherein said combination is stable during use, handling and storage.
2. The combination of claim 1 wherein said stabilizer is present in an amount of from 1 to 50,000 ppm.
3. The combination of claim 1 wherein said stabilizer is present in an amount of from 100 to 1,000 ppm.
4. A heat transfer fluid composition comprising a polyol and the hydrofluoroolefin HFO-1234ze and/or the hydrochlorofluoroolefin 1233zd and a stabilizer selected from, d,1-limonene, d,1-limonene oxide, epoxybutane and or combinations thereof wherein said combination is stable during use, handling and storage.
5. The composition of claim 4 wherein said stabilizer is present in an amount of from 1 to 50,000 ppm.
6. The composition of claim 4 wherein said stabilizer is present in an amount of from 100 to 1,000 ppm.