| 摘要 |
PURPOSE:To provide a metal working oil compsn. contg. a lubricating oil component and a specified polyether polyol deriv., which is useful for metal working at high temp. and under high pressure or severe conditions of cutting and has excellent circulation stability, etc. for easier process control. CONSTITUTION:The metal working oil compsn. contains as essential ingredients (A) a lubricating oil component selected from among oil, fat, mineral oil and fatty acid ester, (B) a compd. selected from among polyether polyol having an MW of 200-10,000 obtained by adding alkylene oxide to polyalkylene polyamine (deriv.), alkyl or alkylarylamine (deriv.) or carboxylic acid amide (deriv.). By the action of the polyether polyol as protective colloid, (A) is dispersed in water under a stabilized condition in a large particle diameter and oil particles with a large diameter form a thick and strong lubricating film on metal workpieces. The large particle diameter is maintained consistently over a long period of use. |
