Aqueous lubricant composition

Abstract

An aqueous lubricant composition contains a first polyether component represented by the general formula I given below, a second polyether component expressed by the general formula II given below and a polyamide component represented by the general formula III. This composition exhibiting a highly advantageous viscosity behavior over a wide range of temperatures has a high resistivity against shearing stress and a superior storage stability, and is thus very suitable for use as a hydraulic fluid, metal drawing fluid, cutting fluid, press oil and the like even in the form of a high water base fluid having a water content over 80% by the components are weight: ##STR1## in which R.sup.1 represents a hydrocarbon group having 5-26 carbon atoms, R.sup.2 is a residue of a polyhydric alcohol, a polyhydric phenol or a polyamine each having 2-26 carbon atoms, R.sup.3 denotes a hydrocarbon group having obtained when a mono- or polycarboxylic acid having 8 to 54 carbon atoms is reacted with an alkanolamine or an alkylalkanolamine to form the formula III compound R.sup.4 represents hydrogen atom, a hydrocarbon group having 1-26 carbon atoms or a group expressed by (C.sub.s H.sub.2S O).sub.h H, Y stands for an oxygen or nitrogen atom, p and q represent an integer of 3 or 4, r and s denote an integer of 2 or 3, g and h represent each an integer from 1 to 20 and t is an integer from 1 to 5, wherein a.gtoreq.0, b.gtoreq.2, c.gtoreq.0, d>0, e.gtoreq.0 and f>0.