摘要:
The present invention is directed to polymer blend compositions for use as viscosity modifiers comprising at least three ethylene-based copolymer components. The viscosity modifiers described herein comprise a first ethylene-based copolymer having an ethylene content of from about 35 to about 55 wt % and/or a heat of fusion of from about 0 to about 30 J/g, a second ethylene-based copolymer having an ethylene content of from about 55 to about 85 wt % and/or a heat of fusion of from about 30 to about 50 J/g, and a third ethylene-based copolymer having an ethylene content of from about 65 to about 85 wt % and/or a heat of fusion of from about 40 to about 70 J/g. The invention is also directed to lubricant compositions comprising a lubricating basestock and a polymer blend as described herein.
摘要:
Lubricant and fuel compositions containing a small additive concentration of a novel organo-phosphorus composition based on phosphite-derived hydroxyl compounds and amine phosphates possess excellent antiwear properties coupled with good extreme pressure activities. Additional antioxidation, cleanliness, antifatigue, high temperature stabilizing, and friction modifying properties are expected. Both the phosphite-hydroxy moiety and the amine phosphate moiety are believed to provide the basis for the synergistic antiwear and EP property of these novel additives.
摘要:
Combinations of dimercaptothiadiazole-mercaptan coupled derivatives with amines have been found to be effective load-carrying additives for lubricants and fuels.
摘要:
This invention relates to an ethylene copolymer for lubricating oil, comprising: ethylene; at least one alpha-olefin having 3 or more carbon atoms; and at least one vicinally substituted olefin having 2 to 40 carbon atoms, wherein: the copolymer has a weight-average molecular weight (Mw) of about 50,000 to about 500,000; and an intensity ratio of Sαβ to Sαα insertions, as determined by a 13C-NMR spectrum of less than 0.5.
摘要:
Disclosed are rheology modifiers comprising compositionally disperse polymeric compositions and/or crystallinity disperse polymeric compositions that may be useful in modifying the rheological properties of lubrication fluids, and methods for making such compositions. The compositionally disperse polymeric composition are formed from at least two discrete compositions of ethylene copolymers. The crystallinity disperse polymeric composition are formed from ethylene copolymers having at least two discrete values of residual crystallinity.
摘要:
A lubricating composition for internal combustion engines especially useful with fuels having less than 350 ppm sulfur comprises a lubricating oil basestock, a boron containing ashless dispersant, a molybdenum containing friction reducing agent, a metal type detergent and zinc dithiophosphate.