Highly filled transition alumina dispersion containing

Aqueous dispersion containing transition alumina as the only solid and a dispersant, wherein - the transition alumina is present in the form of aggregates of primary particles, the content of transition alumina is in the dispersion 40 to 65 wt .-%, having aggregates in the dispersion have a mean aggregate diameter of less than 100 nm, - contains the dispersant polyaluminum hydroxychloride, Polyaluminiumhydroxynitrat and / or polyaluminum hydroxychloride, - the dispersion has a pH of 3 to 5