Patent ID: 9376542
Filing Date: 2016-06-28
CPC Classification: C01F,C01P,C04B,C08K,C09C,C09D,D21H

Claim Text:
1. An aqueous slurry with improved rheological stability under increased temperature comprising: (i) a calcium carbonate containing material, and (ii) at least one comb polymer, wherein the specific viscosity of the at least one comb polymer measured at 20° C. at a polymer concentration of 45 g/l differs from the specific viscosity of said polymer measured at 70° C. by a specific viscosity difference Δη wherein the at least one comb polymer does not have a cloud point between 20° C. and 95° C. measured in water, wherein the at least one comb polymer has a specific charge from −10 C/g to −600 C/g at pH 8, and wherein the viscosity of the aqueous slurry is between 25 and 1000 mPa·s measured at 20° C. and at 90° C.