Omya International Ag

Omya Development Ag

Other

Omya Ag

Beat Karth

Patrick A C Gane

Matthias Buri

Philipp Hunziker

René Burkhalter

Samuel Rentsch

René Vinzenz Blum

Martin Brunner

Michael Tinkl

Pierre Blanchard

Pascal Gonnon

Claudia Pudack

Jürgen Spehn

Holger Müller

Jean-Pierre Elgoyhen

Patrick Gane

Patrick Ac Gane

Rene Burkhalter

Jurgen Spehn

Holger Muller

Patrick AC Gane

The present invention refers to a mineral matter powder preparation by wet process without acrylic additive or other grinding aid additives and to the use of said mineral matter after an optional hydrophobic treatment. Said mineral material having superior dispersing properties.

Mineral material powder with high dispersion ability and use of said mineral material powder

The invention relates to a process for manufacturing aqueous mineral material suspensions or dried mineral materials using at least one lithium ion neutralised water-soluble organic polymer, the ground mineral materials obtained by this process, the use of the mineral materials in paper, paints and plastics, as well as the use of the lithium ion neutralised water-soluble organic polymer in the manufacturing process as a dispersing and/or grinding enhancer.

Process for manufacturing aqueous suspensions of mineral materials or dried mineral materials, the obtained products, as well as uses thereof

The present invention consists of a process of preparation of at least one mineral matter and/or of at least one pigment, including a calcium carbonate made at once partially organophilic and partially hydrophilic, in which the carbonate is blended and/or ground and/or concentrated in an aqueous medium, in the presence of at least one salt of ethylene acrylic acid, one dispersing agent and/or one grinding aid agent, which is introduced before and/or during this treatment stage. Another object of the invention lies in the aqueous dispersions and suspensions of calcium carbonate thus obtained. They may be dried and the dry pigments obtained also constitute an object of the invention. Use of these aqueous dispersions and these dry pigments in the field of plastic, paints and paper constitutes another object of the invention.

Process of manufacture of particles with a natural calcium carbonate and ethylene acrylic acid salts base, suspensions and dry pigments obtained, their uses

The invention relates to a process for manufacturing aqueous mineral material suspensions or dried mineral materials using at least one lithium ion neutralized water-soluble organic polymer, the ground mineral materials obtained by this process, the use of the mineral materials in paper, paints and plastics, as well as the use of the lithium ion neutralized water-soluble organic polymer in the manufacturing process as a dispersing and/or grinding enhancer.

The invention relates to a process for manufacturing calcium carbonate materials having a particle surface with improved adsorption properties of dispersant, using at least one lithium ion-containing compound, the calcium carbonate material obtained by this process, the use of the calcium carbonate materials in paper, paints and plastics, as well as the use of the lithium ion-containing compounds in the manufacturing process.

Process for manufacturing calcium carbonate materials having a particle surface with improved adsorption properties

The invention concerns a pigment, filler or mineral containing a natural calcium carbonate, treated with one of more providers of HOions and gaseous CO, allowing a reduction in the weight of paper for a constant surface area without loss of physical properties when it is used as a pigment or coating filler for the said paper. In particular, the invention concerns a pigment, filler or mineral containing a natural calcium carbonate or dolomite or mixtures of talc and calcium carbonate, of kaolin and carbonate or carbonate alone or in combination with natural and/or synthetic fibres or similar, treated with one or more medium-strong or strong providers of HOions in the presence of gaseous CO. Applications are particularly in the paper industry, obtaining in particular good sheet properties i.e. a reduction its weight for a given surface area.

[object Object]

The invention relates to the use of a weakly ionic and water-soluble copolymer as a grinding aid agent for grinding mineral matter in aqueous suspension in order to obtain aqueous suspensions of refined mineral matter, with a dry matter concentration that can be high, with a low Brookfield&#x2122; viscosity that remains stable over time, having the property that it presents a pigmentary surface area the ionic charge of which, as determined by ionic titration, is low. The invention relates to the aqueous suspensions of mineral matter obtained and their use in the fields of paper, paint and plastics.

Weakly ionic aqueous suspensions of ground mineral matter and their uses

Aqueous suspensions of ground mineral materials, with low ion load and their uses

The invention concerns a pigment, filler or mineral containing a natural calcium carbonate, treated with one of more providers of H O ions and gaseous CO , allowing a reduction in the weight of paper for a constant surface area without loss of physical properties when it is used as a pigment or coating filler for the said paper. In particular, the invention concerns a pigment, filler or mineral containing a natural calcium carbonate or dolomite or mixtures of talc and calcium carbonate, of kaolin and carbonate or carbonate alone or in combination with natural and/or synthetic fibers or similar, treated with one or more medium-strong or strong providers of H O ions in the presence of gaseous CO . Applications are particularly in the paper industry, obtaining in particular good sheet properties i.e. a reduction its weight for a given surface area.

Treated filler or pigment containing natural carbonate

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Oberoenz, Switzerland

Beat Karth