Coatex S.a.s.

Coatex

Omya International Ag

Coatex S.a.

Omya Development Ag

Conservatome S.a.

Christian Jacquemet

Jacques Mongoin

Jean-Marc Suau

Yves Kensicher

Benoit Magny

Pascal Gonnon

Marc Maurer

Clementine Champagne

Olivier Guerret

Jean-Bernard Egraz

Xueping Qiu

Mehdi Bouzid

Patrick A C Gane

Samuel Rentsch

Jacky Rousset

Francois Dupont

Patrick Trouve

Mathieu Skrzypczak

Yves Matter

Henri Grondin

Maurice Husson

Holger Spiegel

Laurie Parrenin

Thomas Schlotterbach

Benoît Magny

Eugène Vorobiev

Pierre Martineu

Clémentine Champagne

Christiane Saunier

Patrick Gane

François Dupont

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.

Process for preparing an aqueous suspension comprising a ground calcium carbonate-comprising material

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.

Reducing hygroscopicity of a mineral material

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.

Controlling the rheology of a metal ore residue

A polymer may have a molecular mass of less than 8,000 g/mol and a polymolecularity index PI of less than 3, produced by free radical polymerization, in water, and at a temperature higher than 50° C., of at least one anionic monomer comprising at least one polymerizable olefinic unsaturation and at least one carboxylic acid function, in the presence of phosphorus with a degree of oxidation I, phosphorus with a degree of oxidation III and a radical-generating compound. Such polymers may be produced and use for grinding mineral matter, as a detergent agent, or as an anti-scaling agent.

Copolymer and grinding of a mineral matter

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.

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.

Method for grinding mineral material

The invention relates to a method for producing particles of mineral material comprising grinding of at least one mineral material in the presence of water. The grinding according to the invention is carried out in the presence of at least one polymer obtained by a radical polymerization reaction of a partial sodium salt of itaconic acid and partial decarboxylation of the polymer obtained followed by partial or total neutralization of the decarboxylated polymer. The invention also relates to an aqueous composition comprising particles of ground mineral material and such a polymer, in particular a mass-loading composition for the production of paper or a paper-coating-colour composition.

Method of milling minerals in the presence of a poly (itaconate)

The present invention relates to a process for producing an aqueous suspension of precipitated calcium carbonate, an aqueous suspension of precipitated calcium carbonate and a precipitated calcium carbonate obtained by the process, a product comprising the aqueous suspension of precipitated calcium carbonate or the precipitated calcium carbonate as well as its use.

High solids precipitated calcium carbonate with copolymeric additive

The present invention relates to a process for producing an aqueous suspension of precipitated calcium carbonate, an aqueous suspension of precipitated calcium carbonate and a precipitated calcium carbonate obtained by the process, a process comprising the precipitated calcium carbonate and its use.

High solids precipitated calcium carbonate with cationic additive

The present invention relates to a ternary mixture consisting of at least one homopolymer or copolymer of (meth)acrylic acid, partially or completely neutralized with sodium, with potassium, with lithium and/or with an amine, at least one solution of silicate or metasilicate chosen from the group consisting of a sodium silicate of formula NaO.nSiO(with n varying between 1 and 4), sodium metasilicate NaSiO, a potassium silicate KO.nSiO(with n varying between 1 and 4), potassium metasilicate KSiOand a mixture of these compounds, and at least one base, as dispersion and/or grinding aid agents of kaolin in aqueous suspension.

Dispersion and/or grinding aid agents of kaolin in aqueous suspension, aqueous suspensions obtained and uses thereof

The present invention is directed to a process for producing an aqueous suspension of precipitated calcium carbonate, wherein a milk of lime is prepared by mixing water, a calcium oxide containing material, at least one water-soluble polymer having a molecular weight Min the range from 200 to 6500 g/mol, and at least one slaking additive, and subsequently, the milk of lime is carbonated to form an aqueous suspension of precipitated calcium carbonate.

Production of PCC

The present invention concerns the use of depolymerized carboxylated celluloses as a dispersing agent or grinding aid agent for aqueous suspensions of mineral materials, intended for paint formulations, plastic formulations, detergent formulations, cosmetic formulations, paper formulations or paper coating colors.

Use of depolymerised carboxylated celluloses for dispersing and grinding mineral materials

The present invention relates to a new solvent-free preparation method of a (meth)acrylic acid polymer in solution, where said polymer has a molecular weight less than 8,000 g/mol and a polydispersity IP index between 2 and 3 by radical polymerization, the polymers obtained by this means, and their applications in industry.

Method for polymerisation of (meth)acrylic acid in solution, polymer solutions obtained and their uses

A method of manufacture of an aqueous suspension of talc, using a copolymer of (meth)acrylic acid with an oxyalkylated monomer with a surfactant group, an aqueous suspension of talc which may be obtained by such a method, and the use of these suspensions in various applications.

Growing community of inventors

Lyons, France

Christian Jacquemet