Production of dispersions containing carbon nanotubes

Process for the preparation of a dispersion containing carbon nanotubes, which comprises the following steps:

• 1. preparation of a mixture of dispersing agent, dispersing aid and, optionally, carbon nanotubes,
• 2. if carbon nanotubes have been added in step 1, optional pre-dispersion of the mixture from step 1,
• 3. dispersion of the mixture from step 1 or of the pre-dispersed mixture from step 2, wherein the dispersion is carried out using a high-pressure homogenizer, during which the viscosity of the dispersion increases to a maximum and then decreases and wherein all or part of the mixture is guided in a loop during the dispersion, wherein further CNT agglomerates are added continuously or discontinuously to the mixture during the dispersion, an initial dispersion being obtained,
• 4. further dispersion of the initial dispersion obtained in step 3 in the high-pressure homogeniser, optionally in loop mode, a final dispersion being obtained.