| abstract |
The present invention relates to a microemulsion metalworking composition concentrate characterized by an aqueous continous phase and an organic dispersed phase comprising water insoluble polyalkylene glycol droplets having a submicron particle size. The concentrate consists essentially of water, an emulsifier which is a water-soluble, base-neutralized phosphate ester, and a water insoluble polyalkylene oxide alcohol. Also disclosed is the use of these concentrates, as is or upon further dilution with water, in a metalworking operation which comprises contacting a metal part to be machined or formed with a lubricating effective amount of the concentrate or water-diluted concentrate. Also disclosed is a mixture useful as an intermediate in the preparation of the above concentrate which consists essentially of the phosphate ester and the water insoluble polyalkylene oxide alcohol. |