Influence of Glycolyzed Polyurethane on Emulsions Containing Vegetable Oils for Metal Cutting Fluid Application: Effect of Hydrophilic Chain

In order to produce environmentally friendly and efficient metal working fluids and also to reduce the impact of waste polyurethane polymer in the environment, polyurethane polymers were recycled in novel process. Waste polyurethane foam was glycolyzed usi ng polyethylene glycol 400 - 600 - 1500 - 4000 - 6000 to give the glycolyzed products (GPU). GPU was esterified by oleic acid to obtain GPUO. The prepared additive was used as emulsifier in the formulation for metal working fluid application in presence of castor oil as environmentally friendly oil. The results showed good stability of the prepared water - vegetable oils emulsions. The pH, specific gravity, kinematic viscosity at 40 o C, 100 o C, surface tension, and anticorrosion tests of the prepared formulation show ed acceptable results comparing with the published data for several working fluids formulations.