Processing

Please wait...

Settings

Settings

Goto Application

1. US20090241882 - METHOD FOR INCREASING THE VISCOSITY OF AUTOMOTIVE FUEL COMPOSITIONS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

Claims

1. A method for increasing the viscosity of an automotive fuel composition in order to achieve a target minimum comprising adding to the composition a concentration c of a VI improving additive which comprises a block copolymer which contains one or more monomer blocks selected from ethylene, propylene, butylene, butadiene, isoprene and styrene monomers, wherein c is lower than the minimum concentration c′ of the VI improving additive which theory would predict would need to be added to the composition in order to achieve a viscosity for the composition of X or greater where c is 0.5% w/w or lower.
2. The method of claim 1 wherein the fuel composition is a diesel fuel composition.
3. The method of claim 1 wherein the copolymer is styrene based.
4. The method of claim 1 wherein the VI improving additive is pre-dissolved in a solvent or fuel component.
5. The method of claim 1 wherein the concentration of the VI improving additive in the fuel composition is from 0.001 to 0.5% w/w.
6. The method of claim 5, wherein the concentration of the VI improving additive in the fuel composition is from 0.15 to 0.5% w.w.
7. The method of claim 5 wherein the concentration of the VI improving additive in the fuel composition is from 0.05 to 0.25% w/w.
8. A method of operating a turbo charger comprising introducing into a combustion chamber of the turbo charger a fuel composition prepared by the method of claim 1.