Method for producing multi-walled carbon nanotubes, multi-walled carbon nanotubes and carbon nanotube powder
AssigneeCovestro Deutschland AG
InventorsHEIKO HOCKE, Oliver Felix-Karl SHLÜTER, Volker MICHELE, Leslaw MLECZKO
Life of this patent
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Abstract
The invention relates to temperature-stable rigid foams which can be cold formed and have a density of 0 to 100 kg/m (according to DIN 53420), an elongation at break (according to DIN 53430) of 12 to 35%, a percentage of open cells (according to DIN ISO 4590-86) of 51% to 98% and a storage module of the foam (according to DIN EN ISO 6721 B:1996-12) in the temperature range of 60 DEG to 190 DEG C of, on average, greater or equal 0.1 MPa, and to composite materials produced with said foams.
Claims19
-16. (canceled)
A process for producing multi-wall carbon nanotubes which comprises the following steps:
- initial charging of a substrate composed of carbon nanotubes in an agitated bed of a reactor,
- introduction of a carbon-containing precursor into the agitated bed,
- reaction of the precursor in the agitated bed under suitable process conditions which bring about graphitic deposition of carbon on the carbon nanotubes of the substrate,
- discharge of the carbon nanotubes from the reactor.
Dependencies are inferred from the claim text.