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Title: A NEW ANTI-OXIDANT FORMULATION PACKAGE FOR ESTOLIDES

Author
item Cermak, Steven - Steve
item Biresaw, Girma
item Isbell, Terry

Submitted to: Society of Tribologists and Lubrication Engineers
Publication Type: Abstract Only
Publication Acceptance Date: 12/4/2006
Publication Date: 5/9/2007
Citation: Cermak, S.C., Biresaw, G., Isbell, T. 2007. A new anti-oxidant formulation package for estolides [abstract]. Society of Tribologists and Lubrication Engineers. p. 142.

Interpretive Summary:

Technical Abstract: Estolides have shown great promise as a biodegradable lubricant when compared to commercially available industrial products such as petroleum-based hydraulic fluids, soy-based fluids and petroleum and synthetic oils. A series of estolides (oleic estolide 2-ethylhexyl esters and coco-oleic estolide 2-ethylhexyl esters) and estolide based products (distilled monomer fractions) were formulated with different concentrations of experimental and commercial anti-oxidant packages. The experimental packages were binary mixtures of hindered phenol (HP) and aromatic amine (AA) type anti-oxidants, with varying HP to AA ratios. The estolide formulations were evaluated for their oxidative stability using the rotating bomb oxidative test (RBOT) following ATSM D-2272-98 Method. Low concentrations of the experimental anti-oxidant packages greatly improved the thermal stabilities of the estolides, and showed promise for formulating a competitive bio-based lubricant. The oxidative stabilities of the formulated estolides and estolide based products will be compared to those of commercially available lubricants and experimental lubricant samples.