Testing, application, and future development of environmentally friendly ester base fluids

摘要: Biodegradation test methods have been compared with regard to conditions and parameters. It has shown that three are, in principle, suitable for non-water soluble products. These are the Sturm (OECD no. 301B), MITI 301 C), CEC L-33-T-82 method. A comparison an actual showed gives highest biodegradation values, while give lower values. is noted measures amount of material used both energy production growth biomass, other measure only production. possible explanation difference between results given. The be more lubricant industry. Applications biodegradable lubricants reviewed, particularly hydraulic fluids. rape seed oil (natural ester) synthetic polyol esters similarities regarding structure but also significant differences. This much better thermal oxidative stability esters. offer possibility making a range products different ISO grades similar properties. Brief consideration given future potential, notably four-stroke lubricants. Finally, there timely reminder that, owing present limited availability natural oils fats their cost, 19% market mineral base fluids could replaced by derivatives.