Nanosized particles of molybdenum sulfide and derivatives, method for its preparation and uses thereof as lubricant additive
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United States of America Patent
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Apr 12, 2005
Grant Date -
Mar 24, 2005
app pub date -
Mar 18, 2003
filing date -
May 8, 2001
priority date (Note) -
Expired
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Abstract
A lubricant composition is disclosed that comprises: (a) a lubricant and (b) at least one molybdenum-containing compound in the form of surface-capped nanosized particles of the general formula: (Z).sub.n (X--R).sub.m wherein Z is an inorganic moiety comprising molybdenum and sulfur in the form of particles having dimensions in the range of from about 1 to about 100 nm; (X--R) is a surface-capping reagent wherein R is a C.sub.4 to C.sub.20 straight or branched-chain alkyl or alkylated cycloalkyl radical or radicals and X is a functional group capable of specific sorption and/or chemical interaction with molybdenum/sulfur moiety; n is the number of molecules of Z in the particles; m is an integer representing the amount of surface-capping reagents relative to a single particle; and the ratio of m to n is in the range of from about 1:1 to about 10:1.
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