Mobil Polyrex 461 EP (NLGI-1) [396.83-lb./180-kg. Drum] 124742

MSDS

PDS

Mobil Polyrex™ 461 EP is a shear-stable polyurea grease with excellent extreme-pressure (EP) and load-carrying characteristics. The proprietary polyurea thickener system exhibits excellent resistance to oxidation and oil separation at operating temperatures as high as 160°C (320°F). With its outstanding high-temperature oxidation stability, load-carrying capability, shear stability, water resistance and wide operating temperature range, Mobil Polyrex 461 EP is an excellent heavy-duty grease for a wide array of industrial and construction applications.

Features

• Extreme-Pressure Protection and Thermal Stability - Mobil Polyrex 461 EP contains a proprietary extreme-pressure (EP) Additives package that provides load-carrying capability without degrading the thermal stability of the grease at high temperatures. Conventional sulfur- and phosphorus-base EP Additivess used in other multi-purpose greases begin to oxidize rapidly at temperatures above 250°F.Mobil Polyrex 461 EP, on the other hand, continues to provide a high level of wear and extreme-pressure protection up to 160°C (320°F) without rapid oxidation of the anti-wear or EP Additivess.
• Superb Shear Stability - The proprietary polyurea thickener system inMobil Polyrex 461 EP exhibits excellent durability and stability when subjected to a mechanical shearing force. For example, in the ASTM D 217 cone penetration test, the consistency of Mobil Polyrex 461 EP changed by approximately one NLGI grade after being worked for 100,000 strokes - similar to the performance of high-quality lithium-complex greases, which are the benchmark for excellent shear stability. By contrast, competitive polyurea greases containing shear-unstable thickener technology can soften by three NLGI grades under the same test conditions. Good mechanical shear stability is important in roller bearing applications where excessive grease softening may lead to grease leakage or purging from the bearing.
• Excellent Water Resistance - The Mobil Polyrex 461 EP formulation is enhanced with water-resistant polymers that enable it to form a tenacious protective film in applications that are heavily contaminated with water. The excellent results obtained for Mobil Polyrex 461 EP in the water washout (ASTM D 1264) and corrosion (ASTM D 6138) tests demonstrate the grease's ability to stay in place and protect bearings in wet environments.
• Wide operating temperature range -20°C (-4°F) to 160°C (320°F).
• Excellent dispensability in automatic grease systems.
• Resistant to water washout and protects bearings from corrosion.

Additional Info