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Lube-Tech PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE Figure 2. Inherent™ C10 ME


3.2 Elevance Aria™ WTP 40 An early example of using Inherent™ chemical building blocks to reengineer base stocks is in the functionali- sation of polyalphaolefin (PAO). Elevance engineers have synthesised olefinic ester technology where PAO-type architecture is combined with ester functionality to create an ester functionalised PAO. A new material offering novel and differentiated performance from PAO, esters and PAO ester blends, Elevance Aria™ WTP 40 is a novel synthetic base stock that is an ester-functionalised polyalphaolefin. Its unique molecular architecture is devised by the use of Elevance Inherent™ renewable carbon-based building block C10 ME.


Table 1. Physical properties of Elevance Aria™ WTP 40


The initial evaluation of our material for industrial use was to study additive compatibility. PAO high viscosity base oils have typical aniline points greater than 120 which requires formulators to commonly blend with esters as compatibilisers. We have also included PAO/ester blends to replicate how lubricant formulations are done in practice. The clarity and colour of additised samples of Elevance Aria™ WTP 40 versus PAO shown in Figure 4 demonstrates the solubility advantage of Elevance Aria™ as compared to PAO and PAO/ester blends.


No.103 page 2


Figure 3. Process: Catalytic oligomerization of linear olefins and esters


The oligomerisation of alpha olefins with our C10 methyl ester creates a PAO structure but with a covalently bonded ester. This branching has decene length and the ME is at the terminal carbon. We can also use these synthesis tools to efficiently manage polarity. Some formulators and additive producers feel group I and group II polarity are the ideal, so we targeted polarity to match these two base stocks, targeting an aniline point of around 100.


This base stock, developed for use in synthetic lubricants, has a number of unique attributes (Table 1), which include inherent additive solvency, ability to lower friction — hence reduce wear, inhibit foam formation and provide deposit control in a finished lubricant. Its low pour point and high viscosity index delivers performance across a broad range of temperatures and lubrication regimes, clean operation and better lubricity, leading to equipment durability and extended lubricant life. Because of its high viscosity, this high-performance molecule is especially designed to formulate high viscosity grade lubricants.


Figure 4. Additive solubility study


LUBE MAGAZINE NO.132 APRIL 2016


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