Superior Solution for Deposit and Varnish Control UCON ™ Oil-Soluble Polyalkylene Glycol (PAG) Lubricant Technology What You Need to Know • UCON™ Oil-Soluble PAGs (OSPs) can extend lubricant life and the reliability of machinery • Used as a base stock, OSPs solubilize their own by-products, reducing deposit formation • Used as an additive, OSPs exceed most competitive products in preventing deposits and varnish OSPs Provide Valuable Advantages Over Competitors Using OSPs as either a deposit control additive in hydrocarbon oils or as primary base oil in fully synthetic fluids, will result in first-rate deposit control. OSPs have an advantage over hydrocarbon oils, as they rarely form deposits. The formation of deposits in equipment can lead to premature equipment failure, costing users both time and money. The Science Behind OSP High Performance Results Traditional hydrocarbon base oils are typically derived from high levels of non-polar molecules. When these oils oxidize they can form high molecular weight oxidation by-products that are polar. The by-products are typically less soluble in the parent base oil and they can drop out of solution, forming deposits on surfaces. In contrast, the oxidation of OSPs yields shorter chain polar molecules that are soluble in their parent base oil. The result is improved deposit control and longer machinery performance. Lubricants and Fuel Additives ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
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Superior Solution for Deposit and Varnish Control UCON™ Oil-Soluble Polyalkylene Glycol (PAG) Lubricant Technology What You Need to Know• UCON™ Oil-Soluble PAGs (OSPs) can
extend lubricant life and the reliability of machinery
• Used as a base stock, OSPs solubilize their own by-products, reducing deposit formation
• Used as an additive, OSPs exceed most competitive products in preventing deposits and varnish
OSPs Provide Valuable Advantages Over Competitors Using OSPs as either a deposit control additive in hydrocarbon oils or as primary base oil in fully synthetic fluids, will result in first-rate deposit control. OSPs have an advantage over hydrocarbon oils, as they rarely form deposits. The formation of deposits in equipment can lead to premature equipment failure, costing users both time and money.
The Science Behind OSP High Performance ResultsTraditional hydrocarbon base oils are typically derived from high levels of non-polar molecules. When these oils oxidize they can form high molecular weight oxidation by-products that are polar. The by-products are typically less soluble in the parent base oil and they can drop out of solution, forming deposits on surfaces. In contrast, the oxidation of OSPs yields shorter chain polar molecules that are soluble in their parent base oil. The result is improved deposit control and longer machinery performance.
Lubricants and Fuel Additives
®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
www.dow.com/ucon/osp ®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
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OSPs Perform as Effective Primary Base StockUsing OSPs instead of hydrocarbon oils as a primary base stock in fully synthetic lubricant formulations can extend fluid life and equipment reliability. The following example is of a fully synthetic OSP compressor oil (ISO-68) that underwent oxidation testing using a modified ASTM D2893B test (72 hours at 60ºC then 72 hours at 150ºC with the cycle repeated for 30 days). For comparison, a Polyalphaolefin (PAO) compressor oil (ISO-68) was run under the same conditions. Figure 2 shows results, with the PAO-based compressor having significant deposits, while the OSP compressor oil is translucent with no deposits. Furthermore, while the PAO compressor oil only had a change of 0.1 mg KOH/g in total acid number (TAN), its kinematic viscosity increased by 10.1% at 40ºC. In comparison, the OSP compressor oil had a similar change of 0.3 mg KOH/g in TAN, but its kinematic viscosity increased by only 4.0% at 40ºC.
Now You KnowDow UCON™ OSPs deliver extended fluid life and improved equipment performance. To learn how you can benefit from OSPs or to get more out of your lubricant, contact our Customer Information Group (numbers below) or visit www.dow.com/ucon/osp to download a technical data sheet and request a sample.
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Figure 2 – Deposit Control Study Comparing PAO Compressor Oil vs. OSP Compressor Oil
PAO Compressor Oil (ISO-68)
OSP Compressor Oil (ISO-68)
Fully Synthetic OSP Compressor Oil (ISO-68)
Initial 7 days 14 days 21 days 30 days
Initial 7 days 14 days 21 days 30 days
OSPs as Deposit Control AdditivesUsing OSPs as additives or co-base oils in hydrocarbon oils significantly reduces the formation of deposits as fluids age. Figure 1 shows a visual example of this concept. Six formulations were examined in oxidation aging experiments using a modified ASTM D2893B test. Four of the fluids included an American Petroleum Institute (API) Group I oil with an antioxidant. Three of these contained a co-base oil that was either an alkylated naphthalene, synthetic ester or OSP at a level of 10%. Aging experiments clearly show only the OSP containing fluid remained clear, translucent and deposit free. Similarly, aging experiments on an API Group II oil containing 10% OSP showed no evidence of deposits when compared to the base oil alone.
Figure 1 – Group I and II hydrocarbon oils with and without OSP, aged for at least 40 days at 120ºC using modified ASTM D2893B
