Patent ID: 9574088
Date: 2017-02-21
CPC Classifications: C01P,C09C

Claim:
1. An aqueous suspension and/or aqueous dispersion of calcium carbonate obtained by the process comprising the steps of (i) contacting calcium carbonate with a grinding and/or dispersing aid agent in water to obtain a calcium carbonate-containing slurry, wherein the grinding and/or dispersing aid agent comprises a zirconium compound selected from the group consisting of ammonium zirconium carbonate, potassium zirconium carbonate, and mixtures thereof, and (ii) grinding and/or dispersing the calcium carbonate-containing slurry to obtain an aqueous suspension and/or aqueous dispersion of calcium carbonate, wherein the aqueous suspension and/or aqueous dispersion of calcium carbonate so obtained consists of calcium carbonate, water, the zirconium compound and optionally one or more polyacrylates as a grinding and/or dispersing agent.