17-03-2016 дата публикации
Номер: US20160075965A1
The present invention relates to a lubricant composition comprising a dispersant of high molecular weight and metal nanoparticles. The lubricant composition according to the invention simultaneously has good stability and good anti-flaking properties. 1. A lubricant composition comprising at least one base oil , at least one dispersant having a weight-average molecular weight greater than or equal to 2000 Daltons and metal nanoparticles in a content by weight ranging from 0.01 to 2% with respect to the total weight of the lubricant composition , the metal nanoparticles being concentric polyhedrons with a multilayer or sheet structure.2. The lubricant composition according to in which the metal of which the metal nanoparticle is constituted is selected from the group formed by tungsten claim 1 , molybdenum claim 1 , zirconium claim 1 , hafnium claim 1 , platinum claim 1 , rhenium claim 1 , titanium claim 1 , tantalum claim 1 , niobium claim 1 , zinc claim 1 , cerium claim 1 , aluminium claim 1 , indium and tin.3. The lubricant composition according to in which the metal nanoparticles are selected from the group formed by MoS claim 1 , MoSe claim 1 , MoTe claim 1 , WS claim 1 , WSe claim 1 , ZrS claim 1 , ZrSe claim 1 , HfS claim 1 , HfSe claim 1 , PtS claim 1 , ReS claim 1 , ReSe claim 1 , TiS claim 1 , ZrS claim 1 , ZrSe claim 1 , HfS claim 1 , HfSe claim 1 , TiS claim 1 , TaS claim 1 , TaSe claim 1 , NbS claim 1 , NbSeand NbTe.4. The lubricant composition according to in which the content by weight of metal nanoparticles ranges from 0.05 to 2% with respect to the total weight of the lubricant composition.5. The lubricant composition in which the average size of the metal nanoparticles ranges from 5 to 600 nm.6. The lubricant composition according to in which the dispersant is selected from the compounds comprising at least one succinimide group claim 1 , the polyolefins claim 1 , the olefin copolymers claim 1 , the copolymers comprising at least one styrene unit ...
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