| 摘要 |
PURPOSE:To obtain the title lubricating oil excellent in compatibility with a hydrochlorofluorocarbon compound and lubricating performance by using a specified polyoxyalkylene glycol derivative as a principal component. CONSTITUTION:The title lubricating oil composed mainly of a polyoxyalkylene glycol derivative having at least one structural unit shown by formula I [wherein R<1> to R<4> are each H, a 1-10C hydrocarbon group or a group of formula II (wherein R<5> and R<6> are each H, a 1-10C hydrocarbon group or 2-20C alkoxyalkyl; R<7> is 2-5C alkylene, alkyl-substituted 2-5C alkylene or alkoxyalkyl- substituted 4-10C alkylene; n is 0 to 20; R<8> is a 1-10C hydrocarbon group), provided that at least one of them is a group of formula II] (e.g. a glycidyl methyl ether/propylene oxide copolymer). |
