Use of a comb copolymer in the preparation of an aqueous slurry with reduced temperature sensitivity, said slurry comprising a calcium carbonate, the viscosity of said aqueous slurry as measured by a HAAKE Rheostress rheometer at 20 s -1 ranging from 25 and 1,000 mPa.s measured at 20°C and at 90°C, - wherein the specific viscosity of said polymer measured at 20°C and 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 sp, wherein the absolute value of Δη sp is less than or equal to 0.5, - wherein said polymer does not have a cloud point between 20°C and 95°C measured in water, and - wherein said polymer has a specific charge from - 10 C/g to - 600 C/g at pH 8, said comb copolymer consisting in: a) acrylic acid monomers and methacrylic acid monomers, wherein the percentage by weight of monomers of methacrylic acid is greater than the percentage by weight of monomers of acrylic acid, and b) at least one macromonomer of formula: R - X - R' according to which: - X represents m units of propylene oxide and n units of ethylene oxide, said units of PO and EO being disposed either randomly or regularly, wherein m and n are integers less than or equal to 150, with at least one of them being a non-zero, - R designates a polymerizable unsaturated group, - R' represents hydrogen or an alkyl group containing from 1 to 4 carbon atoms, and said copolymer is present in a quantity from 0.01 to 10 wt. %, based on the total weight of the solids in the slurry. - wherein the specific viscosity of said polymer measured at 20°C and 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 sp, wherein the absolute value of Δη sp is less than or equal to 0.5, - wherein said polymer does not have a cloud point between 20°C and 95°C measured in water, and - wherein said polymer has a specific charge from - 10 C/g to - 600 C/g at pH 8, said comb copolymer consisting in: a) acrylic acid monomers and methacrylic acid monomers, wherein the percentage by weight of monomers of methacrylic acid is greater than the percentage by weight of monomers of acrylic acid, and b) at least one macromonomer of formula: R - X - R' according to which: - X represents m units of propylene oxide and n units of ethylene oxide, said units of PO and EO being disposed either randomly or regularly, wherein m and n are integers less than or equal to 150, with at least one of them being a non-zero, - R designates a polymerizable unsaturated group, - R' represents hydrogen or an alkyl group containing from 1 to 4 carbon atoms, and said copolymer is present in a quantity from 0.01 to 10 wt. %, based on the total weight of the solids in the slurry. a) acrylic acid monomers and methacrylic acid monomers, wherein the percentage by weight of monomers of methacrylic acid is greater than the percentage by weight of monomers of acrylic acid, and b) at least one macromonomer of formula: R - X - R' according to which: - X represents m units of propylene oxide and n units of ethylene oxide, said units of PO and EO being disposed either randomly or regularly, wherein m and n are integers less than or equal to 150, with at least one of them being a non-zero, - R designates a polymerizable unsaturated group, - R' represents hydrogen or an alkyl group containing from 1 to 4 carbon atoms, and said copolymer is present in a quantity from 0.01 to 10 wt. %, based on the total weight of the solids in the slurry. - X represents m units of propylene oxide and n units of ethylene oxide, said units of PO and EO being disposed either randomly or regularly, wherein m and n are integers less than or equal to 150, with at least one of them being a non-zero, - R designates a polymerizable unsaturated group, - R' represents hydrogen or an alkyl group containing from 1 to 4 carbon atoms, and said copolymer is present in a quantity from 0.01 to 10 wt. %, based on the total weight of the solids in the slurry.