UCON™ LB-550-X is an ISO 460/680 polypropylene glycol fluid designed for high-temperature applications.
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.
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
Higher flash points
Less volatility at elevated temperatures
Less tendency to form oxidative byproducts, e.g., aldehydes, organic acids
Less tendency to become acidic during use
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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