Carbon nanotube agglomerate

1. Particles comprising an agglomerate of carbon nanotubes which have a diameter of from 3 to 100 nm and a length to diameter ratio of at least 5, wherein the agglomerate contains bundles of carbon nanotubes in the form of bulged-out yarns of carbon nanotubes intertwined with one another, wherein the carbon nanotubes in the bulged-out yarn bundle have an average distance from one another in the range of from 20 to 100 nm, wherein at least 95 wt. % of the agglomerate particles have an outer diameter in the range of from 100 μm to 1500 μm.

2. The agglomerate particles according to claim 1 , wherein the agglomerate has a bulk density according to EN ISO 60 of from 20 to 250 kg/m3.

3. The agglomerate particles according to claim 1 , wherein the carbon nanotubes are present in the bulged-out yarn bundle intertwined in one another and essentially are not aligned straight with respect to one another.

4. The agglomerate particles according to claim 1 , wherein the bulged-out yarns of carbon nanotubes essentially have a diameter of from 0.1 μm to 20 μm.

5. The agglomerate particles according to claim 1 , wherein the agglomerate contains, apart from the carbon nanotube bundles in the form of bulged-out yarns, other structured bundle forms of carbon nanotubes, in a bird's nest structure, in an open net structure or in the form of fibril bundles aligned parallel to one another, up to a content of less than 30%.

6. The agglomerate particles according to claim 1 , wherein the carbon nanotubes have a content of impurities of at most 7 wt. %.

7. The agglomerate particles according to claim 1 , wherein the carbon nanotubes are present in the form of multi-wall carbon nanotubes or are based on rolled-up, multi-layer graphene layers.

8. A mixture or composite comprising particles according to claim 1 and a polymer, a rubber, a ceramic, a metal, a metal alloy, a glass or a textile fiber.