Abstract: The present invention relates to a temper rolling oil which comprises:(A) a water-soluble cationic compound prepared by neutralizing a condensation product obtained by reacting the following compounds 1 to 3 with each other by heating:1. an aliphatic dicarboxylic acid,2. at least one amino compound represented by the following formulae (a) to (c): ##STR1## 3. a particular polyethyleneimine, with an oxoacid of phosphorus, (B) an aqueous rust preventive, and(C) water.The present invention is also concerned with a method of temper rolling which, comprises of conducting temper rolling at a reduction ranging from 0.5 to 30% using a dilute solution prepared by diluting a temper rolling oil of the kind as described above, so that the concentration of a water-soluble cation compound contained therein is 300 to 5,000 ppm.

Abstract: The present invention relates to a metal processing lubricant comprising a cationic compound obtained by neutralizing a condensation product between a specific aliphatic dicarboxylic acid and a specific aliphatic basic nitrogen compound with a phosphorus oxy acid or a derivative thereof.The lubricant of the present invention is water-soluble and excellent in lubricating property, and the change of the lubricating property is slight and degradation of the oiling component is reduced. Accordingly, the industrial value of the lubricant of the present invention is very high.