Lubricant base oil, refrigerator oil and working fluid composition for refrigerators
The lubricating base oil of the present invention comprises an ester synthesized from: a first component that is at least one selected from polyhydric alcohols having 2 to 4 hydroxyl groups; a second component that is at least one selected from polybasic acids having 6 to 12 carbon atoms; and a third component that is at least one selected from monohydric alcohols having 4 to 18 carbon atoms and monocarboxylic acids having 2 to 12 carbon atoms. In addition, the refrigerating machine oil and the working fluid composition for a refrigerating machine of the present invention each comprise the above lubricating base oil.
1. A working fluid composition for a refrigerating machine oil, comprising:
a refrigerating machine oil comprising a base oil comprising an ester synthesized from:
a first component that is at least one selected from polyhydric alcohols having 2 to 4 hydroxyl groups;
a second component that is at least one selected from polybasic acids having 6 to 12 carbon atoms; and
a third component that is at least one selected from monohydric alcohols having 4 to 18 carbon atoms and monocarboxylic acids having 2 to 12 carbon atoms,
wherein the first component comprises
a first alcohol that is at least one selected from neopentyl glycol, trimethylolpropane and pentaerythritol; and
a second alcohol that is a butanediol, and
a refrigerant comprising at least one selected from hydrofluorocarbons, hydrofluoroolefins, hydrocarbons having 2 to 4 carbon atoms, and carbon dioxide.
2. The working fluid composition according to claim 1 , wherein the first component comprises at least one selected from neopentyl glycol and trimethylolpropane.
3. The working fluid composition according to claim 1 , wherein the second component comprises at least one selected from adipic acid and sebacic acid.
4. The working fluid composition according to claim 1 , wherein the third component comprises at least one selected from monohydric alcohols having 8 to 10 carbon atoms.
5. The working fluid composition according to claim 1 , wherein the refrigerant has a global warming potential of 1000 or less.
6. The working fluid composition according to claim 1 , wherein the refrigerant has a global warming potential of 700 or less.
7. The working fluid composition according to claim 1 , wherein the refrigerant comprises difluoromethane.
8. The working fluid composition according to claim 1 , wherein the refrigerant comprises propane or isobutane.
9. The working fluid composition according to claim 1 , wherein the refrigerant comprises at least one hydrofluoropropene.