| abstract |
Use of at least one polyethyleneimine as an additive in an aqueous suspension containing from 25 to 62% by volume, based on the total volume of the suspension, of at least one material comprising calcium carbonate, said suspension having a pH between 8, 5 and 11, to increase the pH of the suspension by at least 0.3 pH units, where the change in conductivity of the suspension is not more than 100 µS / cm per pH unit, with polyethyleneimine being which is at least one added to said suspension in an amount of 500 to 15,000 mg per liter of the aqueous phase of said suspension. |