摘要 |
PROBLEM TO BE SOLVED: To provide an aqueous lubricant that has a low viscosity and a low frictional coefficient and also has excellent wear resistance as compared with conventional aqueous lubricants. ! SOLUTION: An aqueous lubricant comprises a straight-chain polymer (A) having a specific structure, and a branched-chain polymer (B) having a specific structure, and the content ratio [(A)/(B)] of the straight-chain polymer (A) to the branched-chain polymer (B) is 5/95 or more and 80/20 or less. ! COPYRIGHT: (C)2015,JPO&INPIT |