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UCON™ LB-550-X is an ISO 460/680 polypropylene glycol fluid designed for high-temperature applications.
Color: Brown
Odor: Mild
Boiling point (760 mmHg): > 200 °C ( > 392 °F)
Flash point: closed cup 180 °C ( 356 °F) ASTM D 93
Vapor Pressure: < 0.01 mmHg at 20 °C (68 °F) ASTM E1719
Relative Vapor Density (air = 1): >1 Calculated.
Relative Density (water = 1): 0.997 at 20 °C (68 °F) / 20 °C Calculated.
Water solubility: < 0.1 % Visual
Viscosity @ 100°F, SUS ASTM D 445: 550
Viscosity Index, ASTM D 2270: 188
Lbs/gallon @ 20°C: 8.30
Specific Gravity@ 20/20°C: 0.998
Closed Cup Flash Point ASTM D 93, °C (°F): 218 (425)
Open Cup Flash Point ASTM D 92, °C (°F): 248 (540)
Water, wt%: 0.25;
Primary Chemistry:
Polypropylene Glycol Monobutyl Ether
UCON™ LB-550-X is a high-performance lubricant manufactured from an alcohol-started base stock featuring oxypropylene groups (m=0) with one terminal hydroxyl group. The UCON™ LB-550-X is water insoluble and has a viscosity of 550 cSt at 100°F. UCON™ LB-550-X is particularly well suited for high-temperature operation where traditional lubricants are prone to degrade and fail.
Similar to other UCON™ LB products, the UCON™ LB-550-X is a lubricant formulated with an antioxidant for improved stability and broad-temperature performance. The UCON™ LB-550-X is a phenomenal choice for any application that requires enhanced oxidative stability. This polyalkylene glycol–formulated fluid features excellent lubricity, high viscosity indices, low pour points, and strong stability across a variety of applications. UCON™ LB-550-X applications can range from hydraulic fluids to quenchants and as a lubricant, from gears and bearings to compressors.
Poor high-temp performance for high-viscosity lubricants
High varnish or lacquer generation
UCON™ LB-550-X is commonly used as a lubricating fluid for industrial applications requiring enhanced oxidation stability at high temperatures.
It is important to note that improvements from utilizing this lubricant result from high-temperature antioxidants in the fluid. Over time, the antioxidant will deplete as it reacts with oxygen. As the antioxidants become depleted, UCON™ LB-550-X will be no more stable than uninhibited UCON™ LB fluids. The color of the UCON™ LB-550-X will become dark brown without the complete loss of antioxidant effectiveness.
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