| abstract |
An object of the present invention is to provide a lubricant excellent in fluidity, lubricity, low foaming property, and wastewater treatment property. A lubricating oil containing a polyether (E) represented by the following general formula (1), having an HLB of 8.5 to 19 and having a weight average molecular weight of more than 10,000 and not more than 23,000. Agent. Embedded image [Wherein R 1 is a residue obtained by removing q OH groups from a q-valent aliphatic alcohol having 1 to 8 carbon atoms, R 2 is H or an alkyl group having 1 to 8 carbon atoms, and A 1 and A 2 are It is one or more alkylene groups having 3 or 4 carbon atoms. k is 0 or an integer of 1 or more, m and n are integers of 1 or more, and m + n is 10 or more. p is an integer of 1 or more, and q is an integer of 1 to 8. ] [Selection diagram] None |