Grease composition and use of grease composition
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United States of America Patent
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Feb 7, 2023
Grant Date -
Jul 2, 2020
app pub date -
Dec 20, 2018
filing date -
Dec 27, 2017
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Abstract
Provided is a grease composition which contains (A) a mixed base oil containing (A1) a low-viscosity base oil having a kinematic viscosity at 40° C. of 10 to 50 mm2/s and (A2) a high-viscosity base oil having a kinematic viscosity at 40° C. of 200 to 700 mm2/s, (B) a lithium-based thickener and (C) a polymer having a kinematic viscosity at 100° C. of 1,000 to 100,000 mm2/s, and has an apparent viscosity at −10° C., as measured according to JIS K2220:2013 and at a shear rate of 10 s−1, of 50 to 250 mPa·s. The grease composition is excellent in pumpability and is also excellent in wear resistance under poor lubrication conditions.
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