Aqueous suspensions of calcium carbonate-comprising materials with low deposit built up

摘要

The present invention concerns an anti-deposit additive and a deposit and/or corrosion reducing aqueous slurry containing a calcium carbonate containing material. In particular, the present invention is directed to the use of at least one anionically charged comb polymer as an anti-deposit agent in an aqueous slurry comprising a calcium carbonate containing material.

主权项

1. A method of making a slurry comprising a calcium carbonate containing material comprising introducing at least one anionically charged comb polymer as an anti-deposit agent in an aqueous slurry comprising a calcium carbonate containing material,
wherein the at least one anionically charged comb polymer has a specific charge from −10 C/g to −250 C/g at pH 8, wherein the electrical conductivity of the slurry comprising the at least one anionically charged comb polymer is less than 500 μS/cm at 25° C., and wherein the slurry has a solid content from 45 to 82 wt.-%, based on the total weight of the aqueous slurry.