ExxonMobil Mobil Polyrex EP 2

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ExxonMobil Mobil Polyrex EP 2
Categories:	Fluid; Lubricant; Urea Gellant
Material Notes:	Mobil Polyrex EP 2 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 350°F. With its outstanding high-temperature oxidation stability, load-carrying capability, shear stability, water resistance and wide operating temperature range, Mobil Polyrex EP 2 is an excellent multi-purpose grease for a wide array of industrial and construction applications. Mobil Polyrex EP 2 is an excellent multi-purpose grease for a wide array of industrial and construction applications.
Key Words:	NLGI Grade 2
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Physical Properties	Original Value	Comments

Viscosity Measurement	85	Index; ASTM D2270
Kinematic Viscosity at 40°C (104°F)	235 cSt	ASTM D445
Kinematic Viscosity at 100°C (212°F)	18.4 cSt	ASTM D445

Mechanical Properties	Original Value	Comments
Four Ball Extreme Pressure, Weld Load	500 kg	ASTM D2596
Four Ball Wear	0.400 mm	40 kg, 1200 rpm, 75°C, 1 hr
Penetration	280	Worked, 60x; ASTM D217
	310	Worked, 100000, mm/10; ASTM D217
Oil Separation	<= 0.30 %	ASTM D1742
Timken Test	45.0 lb

Thermal Properties	Original Value	Comments
Dropping Point	280 °C	ASTM D2265

Descriptive Properties
Color	green
Corrosion Prevention, ASTM D1743	pass
Grease Life, DIN 51821 (FE-9), hours	490	@ 177°C
Low Temperature Torque, ASTM D1478, g-cm	12.2	@ -40°C
Soap/Thickener Type	polyurea
Water Spray Resistance, ASTM D4049, % Spray-off	15
Water Washout, ASTM D1264, wt%	2.7	@ 79°C

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