| abstract |
(57) [Problem] To provide a water-soluble lubricant excellent in fluidity, lubricity, low foaming property and oil separating property. SOLUTION: It is represented by the following general formula (1), has an HLB of 8.5 or more, and has a weight average molecular weight of 1,000 to 1,000. Lubricants containing 10,000 polyethers [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, A 1 and A 2 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. ] |