| abstract |
The present invention relates to a process for producing a base oil, which comprises adding to the base oil an organic compound having at least two unoccupied double bonds in the molecule, a terpene compound having a double bond in the molecule and at least one selected from among aliphatic unsaturated hydrocarbons having 12 to 30 carbon atoms The present invention provides a lubricating oil composition for a compression refrigerator excellent in thermal and chemical stability even when used in a compression type refrigerator using a low carbon number saturated fluorohydrocarbon refrigerant having a low global warming coefficient by containing an organic compound having a double bond in the molecule . |