Abstract: The present invention relates to a process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material, the use of a homopolymer or a copolymer in such a process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material, an aqueous suspension comprising a ground calcium carbonate-comprising material obtained by the process, and the use of an aqueous suspension comprising a ground calcium carbonate-comprising material in paper applications such as paper filling and paper coating applications, in coating applications, in paints, in adhesives, in sealants, in concrete, in agriculture applications, in food applications, in cosmetic applications, or in pharmaceutical applications.

Abstract: A method for reducing the hygroscopicity of a material (M) including calcium carbonate may include treating the calcium carbonate with at least one homopolymer grinding assistant (P) which is neutralized in a particular way. A method for producing such a material (M) including calcium carbonate may include treating the calcium carbonate with at least one homopolymer grinding assistant (P) to provide such a material (M), which is then of reduced hygroscopicity. Such a calcium carbonate may be used as a filler in polymeric plastics.

Abstract: The invention relates to a method for preparing an aqueous suspension of at least one phosphate material, comprising, dispersing, in water, particles of phosphate material in the presence of at least one additive of the anionic polymer of acrylic acid or of methacrylic acid type. The suspension according to the invention has a viscosity of less than 1500 mPa·s. The invention also relates to the conditioning of the phosphate material associated with the anionic polymer, for its subsequent treatment with at least one strong acid, for the industrial preparation of phosphoric acid.

Abstract: Provided is an aqueous suspension of a mineral material prepared using an improved aqueous dispersion of a (meth)acrylic polymer neutralized with a monovalent ion. Also provided is a dispersant including the aqueous suspension of a mineral material and methods for the preparation of a mass filler for the production of paper using the aqueous suspension of a mineral material, the preparation of a paper coating slip aqueous suspension of a mineral material, and the preparation of a coating composition aqueous suspension of a mineral material.

Abstract: A method can prepare an aqueous mineral suspension from an aqueous metal ore residue into which there is introduced a polymer (P) having a molecular weight Mw measured by GPC of from 100,000 to 3.106 g/mol and prepared by free radical polymerization of at least one anionic monomer (m). The suspension produced may have a Brookfield viscosity greater than 2,000 mPa·s and/or a flow threshold of greater than 40 Pa.

Abstract: A method for preparing an aqueous mineral suspension from an aqueous metal ore residue may include introducing into the aqueous metal ore residue a polymer (P) having a molecular mass Mw measured by GPC ranging from 2,000 to 20,000 g/mol. The polymer (P) may be prepared by radical polymerization of at least one anionic monomer (M). The suspension produced by such a method may have a Brookfield viscosity of which is lower than 1,800 mPa·s or a yield point of lower than 80 Pa.

Abstract: A barrier layer applied to a cellulose substrate to protect sensitive substances. The cellulose substrate is coated with the barrier layer composition. An aqueous mineral suspension and an aqueous composition for preparing the barrier layer composition includes a polymeric stabilising agent prepared from (meth)acrylic acid and a polyalkoxylated methacrylic derivative.

Abstract: The present invention relates to a method for producing mineral particles grinding a mineral material in the presence of a specific anionic polymer. The polymer used is obtained by means of polymerisation in the presence of sodium hypophosphite, disodium dipropionate trithiocarbonate and at least one radical-generating compound. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a paper coating slip composition.

Abstract: The invention relates to a method for the industrial preparation of phosphoric acid from an aqueous suspension comprising water and particles of at least one phosphate material dispersed in the presence of at least one additive of the anionic polymer type. Phosphoric acid is obtained by treating this suspension with at least one strong acid. The polymer is obtained by polymerization reaction of at least one acid selected from acrylic acid, methacrylic acid and salts thereof. The invention relates to the use of this anionic polymer as well as the method for improving the rheology of the suspension and the hydrodynamics of the reaction medium in which the reactions for the manufacture of phosphoric acid take place.

Abstract: The invention relates to a method for grinding phosphate rock in the presence of a particular anionic polymer having a molecular weight of between 1000 and 90000 g/mol, which makes it possible to control the extent (S) of the volume distribution of the particle size of obtained phosphate mineral particles. The invention also relates to a method for improving the production yield of a phosphate rock grinding method.

Abstract: The present invention relates to a process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material, the use of a homopolymer or a copolymer in such a process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material, an aqueous suspension comprising a ground calcium carbonate-comprising material obtained by the process, and the use of an aqueous suspension comprising a ground calcium carbonate-comprising material in paper applications such as paper filling and paper coating applications, in coating applications, in paints, in adhesives, in sealants, in concrete, in agriculture applications, in food applications, in cosmetic applications, or in pharmaceutical applications.

Abstract: A method may reduce the hygroscopicity of a material including calcium carbonate using at least one copolymer for assisting in grinding which is neutralized in a particular way, as well as a method for packaging such a material. The copolymer may have a molecular mass measured by SEC in a range of from 4,000 to 20,000 g/mol, and a polydispersity index in a range of from 1.5 to 4.0, and may be prepared by polymerizing acrylic acid and/or methacrylic acid, optionally in salt form, and non-ionic monomer(s) including hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, a C1-C5 acrylate ester, a C1-C5 methacrylate ester, or combinations thereof, wherein the carboxylic acid groups may be at least partially neutralized by 70 mol. % of Na+ and from 10 to 30 mol % of Na+, K+, and/or Li+.

Abstract: The invention pertains to the field of materials based on calcium carbonate and in particular to the use thereof as a filler in polymeric plastics. The invention provides a method for reducing the hygroscopicity of a material (M) comprising calcium carbonate by treatment with at least one homopolymer grinding assistant (P) which is neutralized in a particular way. The invention pertains also to a method for producing said material (M), which is then of reduced hygroscopicity.

Abstract: The invention relates to a method for the industrial preparation of phosphoric acid from an aqueous suspension comprising water and particles of at least one phosphate material dispersed in the presence of at least one additive of the anionic polymer type. Phosphoric acid is obtained by treating this suspension with at least one strong acid. The polymer is obtained by polymerization reaction of at least one acid selected from acrylic acid, methacrylic acid and salts thereof. The invention relates to the use of this anionic polymer as well as the method for improving the rheology of the suspension and the hydrodynamics of the reaction medium in which the reactions for the manufacture of phosphoric acid take place.

Abstract: A method can prepare an aqueous mineral suspension from an aqueous metal ore residue into which there is introduced a polymer (P) having a molecular weight Mw measured by GPC of from 100,000 to 3.106 g/mol and prepared by free radical polymerization of at least one anionic monomer (m). The suspension produced may have a Brookfield viscosity greater than 2,000 mPa·s and/or a flow threshold of greater than 40 Pa.

Abstract: The invention relates to a method for controlling the sedimentation of an aqueous mineral suspension of a mining derivative by means of the gravimetric concentration of the aqueous suspension in the presence of a flocculating agent and a polymer (P) which has a GPC-measured molecular mass Mw of between 2000 and 20000 g/mol and is prepared using at least one free radical polymerisation reaction of at least one anionic monomer (M). The invention also relates to the resulting suspension, which has a Brookfield viscosity of less than 1 800 mPa·s or a yield point of less than 80 Pa.

Abstract: The invention concerns a method for preparing an aqueous mineral suspension from an aqueous metal ore residue into which a polymer (P) is introduced having a molecular mass Mw measured by GPC ranging from 2,000 to 20,000 g/mol and prepared by radical polymerisation of at least one anionic monomer (M). The invention also concerns the suspension produced, the Brookfield viscosity of which is lower than 1,800 mPa·s or the yield point of which is lower than 80 Pa.

Abstract: The invention relates to a method for preparing an aqueous suspension of at least one phosphate material, comprising, dispersing, in water, particles of phosphate material in the presence of at least one additive of the anionic polymer of acrylic acid or of methacrylic acid type. The suspension according to the invention has a viscosity of less than 1500 mPa·s. The invention also relates to the conditioning of the phosphate material associated with the anionic polymer, for its subsequent treatment with at least one strong acid, for the industrial preparation of phosphoric acid.

Abstract: The present invention relates to a method for producing mineral particles grinding a mineral material in the presence of a specific anionic polymer. The polymer used is obtained by means of polymerisation in the presence of sodium hypophosphite, disodium dipropionate trithiocarbonate and at least one radical-generating compound. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a paper coating slip composition.

Abstract: Preparation of aqueous slurries of calcium dihydroxide. Preparation of aqueous suspensions of calcium hydroxide.