Synthetics, Mineral Oils, and Bio-Based Lubricants

Lubricity and Tribological Properties of Dicarboxylic Acid and Oleyl Alcohol Based Esters

“…Within the increasing temperature, their viscosity gets slightly reduced. The result, their viscosity indexes are high (Rudnick 2006). The physical properties can be primarily attributed to the structure of the lubricant base stock.…”

“…Dicarboxylic acids ester which mainly contains linear acid or alcohol groups is capable of forming a more coherent, tightly packed surface film than branched group. Therefore, it has superior lubricity to esters which mainly contain branched groups (Rudnick 2006). Previous research reported widespread applications of some esters of dicarboxylic acids.…”

“…They are also used as base oils, which is usually the result of some additional requirements including higher lubricity, minimizing misting or a desire for a high level of biodegradability. Friction modifiers for automotive applications include some carboxylic acids, sulfurized fatty acids, glycerol monoesters and oleate esters (Rudnick 2006). Among synthetic esters is the TMP trioleate which is recognized as very useful, and its usefulness is attributed to its ISO46 viscosity and a pour point that is about -50°C.…”

Human Health Concenrs of Metalworking Fluid Components

“…This bioresistance leads to easier fluid maintenance and longer sump life, and thus lower raw material and disposal costs. Polyalkylene glycols exhibit low toxicity (21). Silicone oils are chemically inert, nontoxic and fire-resistant.…”

Synthesis, Characterization and Tribological Evaluation of New Generation Materials for Aluminum Cold Rolling Oils

“…A typical lubricant used for the cold rolling of aluminum might contain 0.5-2 wt% oleic acid, lauryl alcohol, butyl stearate or palm oil as a lubricity additive and a Pb with viscosity in the range of 2-4 cSt at 100˝C [19][20][21]. In the rolling of aluminum, the need to produce stain free sheets or foils also places certain demands on the lubricants that serve the bearing and hydraulic systems in the mill [22,23].…”