Coatex S.a.s.

Coatex

Coatex S.a.

Omya International Ag

Omya Development Ag

Ocp Sa

Jacques Mongoin

Jean-Marc Suau

Christian Jacquemet

Georges Ravet

Olivier Guerret

Jean-Bernard Egraz

Patrick A C Gane

Matthias Buri

Benoit Magny

Patrick Trouve

Samuel Rentsch

René Vinzenz Blum

Denis Ruhlmann

Benoît Magny

Fabrizio Belli

Yves Kensicher

François Dupont

Francois Dupont

Clementine Champagne

Driss Dhiba

Hamid Mazouz

Xueping Qiu

Mehdi Bouzid

Céline Methivier

Angelo Berlendis

Patrick A Gane

Jacky Rousset

Renaud Souzy

Yves Matter

Murielle Guillot

Catherine Bonnet

Patrick Gane

Djillali Foual

Hubert Parant

Georges Saunders

Marc Feller

Joe McJunkins

Clémentine Champagne

Joe Mcjunkins

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

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.

Preparation of an aqueous suspension of phosphate 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 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 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.

Preparation of phosphoric acid

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

Aqueous lime slurry, preparation process and uses

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 relates to the use of a new polymeric aqueous emulsion for surface treating particles of mineral matter.

Use of a polymeric emulsion for the surface treatment of particles of mineral matter

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 invention consists in the use, as a dry grinding aid agent of a mineral matter chosen from among the dolomites, talc, titanium dioxide, alumina, kaolin and calcium carbonate, the function of which is to reduce the specific grinding energy and to increase the grinding capacity, of formulations containing glycerol.

Use of formulations containing glycerol as a dry grinding aid agent of mineral matter

The invention concerns to the use, as an agent improving the thermal stability of (meth)acrylic comb polymers of a macromonomer whose formula (I) is:R-(A-O)&#x2014;(B&#x2014;O)&#x2014;R'&#x2003;&#x2003;(I)wherein both m and n are non-zero and A and B designate alkyl groups having 2 to 4 carbon atoms, but different from one another. The invention further pertains to the implementation of the polymers obtained, as agents improving the thermal stability of the plastic compositions that contain them.

Macromonomers improving the thermal stability of (meth)acrylic comb polymers, use of these polymers in loaded plastic compositions

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

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Quincieux, France

Jacques Mongoin