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UPDATED 1 Sept: The EI library in London is temporarily closed to the public, as a precautionary measure in light of the ongoing COVID-19 situation. The Knowledge Service will still be answering email queries via email , or via live chats during working hours (09:15-17:00 GMT). Our e-library is always open for members here: eLibrary , for full-text access to over 200 e-books and millions of articles. Thank you for your patience.
Using complex polymeric esters as multifunctional replacements for chlorine and other additives in metalworking. P.R. Miller and H. Patel. Lubric. Engng., February 1997, 53(2), 31--33.
Environmental and economic reasons for replacing chlorinated additives in metalworking fluids are discussed. The new ASTM Tapping Toque Test method (D-5619) is used to compare metal removal fluid efficiency and to develop alternative additive technologies. Promising results are reported with complex pentaerythritol esters with molecular weights in the range 150 000 to over 2 million. Most are liquid at room temperature and viscosity indices exceed 225. Thermal gravimetric analysis shows that thermal decomposition temperatures are in the range 425 to 475 C. Proprietory esters based on succinic acid chemistry are also recommended. A case history described the milling of brass alloys using the new technology.
Abstract details
Journal title: Lubrication Engineering
Keywords: Additives for fuel and lubricants
Subjects: Physics, Precision Metalworking, Fuel quality and control, Chemical and petrochemical, Non-ferrous metals, Additives and oxygenates, Lubricants
