Finished lubricant with improved rust inhibition
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United States of America Patent
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Mar 15, 2011
Grant Date -
Jul 8, 2010
app pub date -
Dec 30, 2009
filing date -
Oct 25, 2005
priority date (Note) -
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Abstract
A finished lubricant having a kinematic viscosity at 40.degree. C. between about 90 and 1700 cSt that passes the 4 hour TORT B rust test, comprising: a) greater than 65 weight percent API Group III base oil, API Group IV base oil, polyinternal olefin base oil, or mixtures thereof; and b) between about 0.10 wt % and about 5 wt % solubility improver. The solubility improver has an aniline point less than 50.degree. C., or even lower. The finished lubricant can additionally comprise a mixture of amine phosphates.
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