| 摘要 |
1. Claims (for the Contracting States : BE, DE, FR, GB, IT, NL, SE) Mineral filler, particularly natural calcium carbonate for paints and paper coatings, characterised in that the ratio is : % by weight particles < 1 mu m/ % by weight particles < 0.2 mu m = R = 4.8 and in that at least 93% by weight of the particles are smaller than 2 mu m. 1. Claims (for Contracting State AT) Process for manufacturing a filler, particularly of a natural calcium carbonate for paints and paper coatings, characterised in that the initial material is crushed in such a way by wet crushing without a dispersing agent and with a concentration of solids of below 60% by weight, that the ratio is % by weight particles < 1 mu m/ % by weight particles < 0.2 mu m = R = 4.8 in that at least 93% by weight of the particles are smaller than 2 mu m and in that the crushed suspension is filtrated and the filter cake containing approximately 20% water is either dried or converted into a suspension with a lower viscosity by adding a dispersing agent. |
