Method of preparing greases
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United States of America Patent
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Nov 18, 2014
Issued Date -
N/A
app pub date -
Mar 28, 2011
filing date -
Jul 30, 2010
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Abstract
Provided is a method for preparing a grease composition, which comprises mixing grease components under high pressure and high flow rate impingement. In one embodiment, a first mixture of an amine in a lubricating base oil is mixed with an isocyanate in a lubricating base oil under high pressure and high flow impingement. In another embodiment, the mixing and reaction occurs in a reaction injection molding device. The orifice size through which each of the mixtures is introduced into a reaction/mixing zone is less than 0.030 inch (0.0762 centimeter) in diameter. The resulting grease composition is an extremely low noise grease, being virtually clear of any urea thickener particles, and/or can exhibit good high temperature resistance and mechanical stability.
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