摘要:
Calcium carbonate particles having very narrow particle sizes with a controlled D 98 and minimal ultrafines (very small particles) are described. The particles are prepared by grinding a feedstock in a centrifugal grinding mill, which utilizes very high centrifugal forces to impact the particles with each other or grinding media.
摘要:
L'invention consiste en Putilisation d'un agent anti-sedimentation et reducteur de mousse, dans un procede comprenant une etape de broyage en milieu aqueux d'au moins une matiere inorganique et d'au moins un liant, caracterisee en ce que ledit agent anti-sedimentation et reducteur de mousse est une emulsion inverse formee d'une dispersion dans une phase huileuse de particules d'eau et d'un polymere de Pacrylamide avec un monomere acrylique.
摘要:
It is an object of the present invention to provide a process of manufacturing calcium carbonate-containing slurries, wherein said calcium carbonate-containing slurries are prepared by adding one or more zirconium compounds, and possibly one or more further phosphate-free additives acting as dispersing and / or grinding aid agents. An other object of the invention lies in calcium carbonate-containing slurries thus obtained, and dry calcium carbonate mineral pigments resulting from the drying of such slurries. A further object of the invention is the use of such slurries and such dry mineral pigments in paper manufacturing, plastic coatings, as fillers for plastics or for aqueous paint compositions and the like. Papers, paints and plastics containing such slurries and such dry pigments are also an object of the present invention.
摘要:
Es werden Beschichtungsmassen beansprucht, die mit Silanen modifizierte Nanopartikel und ein organisches Bindemittel sowie gegebenenfalls Zusatzstoffe, enthalten, wobei die Beschichtungsmassen solche mit Silanen modifizierte Nanopartikel enthalten, die durch Desagglomeration von Nanopartikel enthaltenden Agglomeraten in Gegenwart eines organischen Lösungsmittels und gleichzeitige oder anschließende Behandlung mit einem Silan erhalten werden. Die mit den Silanen modifizierten Nanopartikel verleihen den Beschichtungsmassen bzw. den Beschichtungen eine verbessert Kratzfestigkeit.
摘要:
A thermal ink jet recording paper, incorporating dewatered and milled precipitated calcium carbonate ("PCC") is disclosed Precipitated calcium carbonate is dewatered and milled in the presence of an amphoteric or anionic dispersant to produce a high solids PCC composition. When used in coating formulations the PCC has a surface morphology and chemistry that enhances the printability of ink jet paper. Ink jet recording paper incorporating the PCC of the present invention has reduced ink feathering and spreading as well as improved optical density, dry time, and water fastness.
摘要:
A method is disclosed for the production of a superfine mineral material powder wherein the subject mineral material is combined with a dry separation agent such as sodium chloride and ground for a sufficient time to produce the superfine mineral material of predetermined size or specific surface area. The separation agent is then removed from the final product by washing it with a solvent such as water. Superfine powders composed of mineral materials where the material is selected from the group consisting of talc, calcium carbonate, zeolite, clay, aluminum hydroxide, aluminum silicate, iron oxide and magnesium oxide are also claimed.
摘要:
Systems and methods of making and using fine particle materials in pigment blends and for using the aforementioned pigment blends in paint, coating, or coloring compositions are provided. This invention further provides systems and methods of enhancing the visual appearance of a variety of substrates by introducing a paint, coating, or coloring composition to the substrate. The fine particle materials of the present invention have a substantially random geometric shape, a particle size less than about 100 microns, and help provide both functional and visual enhancing properties to compositions and substrates containing these fine particle materials.
摘要:
The invention concerns the use of water soluble homopolymers and/or copolymers of acrylic acid with one or several acrylic, vinyl or allyl monomers as dispersion agents of aqueous suspension of mineral particles derived from a mechanical and/or thermal upgrading step following a wet-process grinding step not using dispersant and with low dry-matter concentration. The invention also concerns said aqueous suspensions and their uses in paper making, paint, fillers for rubber and synthetic resins, detergent and cleaning formulations, ceramics, drilling fluids, cements, plasters and other uses in civil engineering, the building sector and public works.
摘要:
A method for preparing precipitated silicates and silicas having good high shear rheology in high solids aqueous slurries. Destructuring of aluminum silicate and silica via dry milling results in decreasing DBP oil absorption. The destructured materials are useful for ink jet coating formulations.