| abstract |
A lubricant and, in particular, an aqueous, waste-treatable lubricant such as, for example, a metalworking fluid. The lubricant comprises a carboxy-terminated reaction product (1) prepared by the reaction of at least 2 moles of anhydride with 1 mole of polyalkylene glycol at a temperature of less than 130 °C, preferably less than 120 °C, and more preferably less than 115 °C or (2) prepared by a halomethylation type reaction, ie a kloromethylation type reaction of polyalkylene glycol. |