摘要:
The present invention relates to the use of a surface-reacted calcium carbonate as an anti-blocking agent in polymer(s) containing compositions, wherein the surface-reacted calcium carbonate is a reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and one or more H 3 O + ion donors in an aqueous medium, wherein the carbon dioxide is formed in situ by the H 3 O + ion donors treatment and/or is supplied from an external source, an anti-blocking agent comprising surface-reacted calcium carbonate or a combination of surface reacted calcium carbonate and mineral material, a method for controlling the blocking of polymer(s) containing compositions, a polymer(s) containing composition comprising surface reacted calcium carbonate or a combination of surface reacted calcium carbonate and mineral material, a coating composition comprising such polymer(s) containing composition, as well as a substrate coated with such coating composition.
摘要:
The invention relates to a material containing at least 97 wt.% alkaline earth carbonate, with a calcium oxide content of 0.3 wt.% or less, and a particle size fraction of between 0.1 and 1.8 mm. The invention also relates to a method for producing same, and to the use of same for neutralising, filtering and/or hardening liquids.
摘要:
The present invention relates to a process for producing an aqueous slurry comprising a blend of surface modified calcium carbonate comprising particles (MCC) and precipitated calcium carbonate comprising particles (PCC), an aqueous slurry comprising the blend, as well as the blend obtainable by drying the aqueous slurry and their uses in paper, paper coating, tissue paper, digital photo paper, paints, coatings, adhesives, plastics, waste water treating or waste water treating agents.
摘要:
The present invention refers to a process for preserving an aqueous preparation of mineral material like e.g. calcium carbonate preparations, and to the use of a composition as a preservative in an aqueous preparation of mineral materials.
摘要:
The invention relates to a powder composition based on a calcium/magnesium compound having formula (I), x Ca A. (1-x) [yMgA+(1-y)MgO], in which A is a group =(OH)2 or =CO3 and x and y are mole fractions where 0
摘要:
The present invention relates to a process for the preparation of a pigment comprising a surface-reacted precipitated calcium carbonate (PCC), the process comprising the steps of a) providing at least one precipitated calcium carbonate (PCC)-comprising pigment; b) providing H 3 O + ions; c) providing at least one anion being capable of forming water-insoluble calcium salts, said anion being solubilised in an aqueous medium; d) contacting said PCC-comprising pigment, with said H 3 O + ions and with said solubilised anions in an aqueous medium to form a slurry of surface-reacted PCC-comprising pigment, wherein said surface-reacted PCC comprises an insoluble, at least partially crystalline calcium salt of said anion formed on the surface of the PCC; wherein excess solubilised calcium ions are provided during step d). The present invention further relates to a slurry of surface-reacted PCC comprising pigment obtained by this process, its use as well as the surface-reacted PCC contained in the slurry.
摘要翻译:本发明涉及一种制备包含表面反应的沉淀碳酸钙(PCC)的颜料的方法,该方法包括以下步骤:a)提供至少一种沉淀碳酸钙(PCC)的颜料; b)提供H 3 O +离子; c)提供至少一种能够形成水不溶性钙盐的阴离子,所述阴离子溶解在水性介质中; d)将所述含PCC的颜料与所述H 3 O +离子和所述溶解的阴离子在水性介质中接触以形成表面反应的含PCC的颜料的浆料,其中所述表面反应的PCC至少包含不溶性的 所述阴离子的部分结晶钙盐形成在PCC的表面上; 其中在步骤d)期间提供过量溶解的钙离子。 本发明还涉及包含通过该方法获得的颜料的表面反应的PCC的浆料,其用途以及浆料中所含的表面反应的PCC。
摘要:
The invention relates to novel and innovative PCC pigments, able to be used in a paper coating formulations to manufacture coated "multipurpose" papers, in particular for inkjet applications, whose print qualities would be identical or quite similar to high resolution commercial papers, while maintaining a reduced paper manufacturing and production cost. Said pigments are obtained by a carbonation process using a reduced flow rate of CO 2 /air, which leads to porous agglomerates of PCC of a very specific structure and unique properties, followed by an upconcentration step leading to substantially the same agglomerates but with a higher, appropriate, solids content.
摘要:
Disclosed herein are dry aggregated calcium carbonates, comprising calcium carbonate and at least one inorganic binder, wherein the dry aggregated calcium carbonate has a median aggregate particle size (D50) of at least 5 microns. Also disclosed are compositions comprising such calcium carbonates. Products, such as paints, and methods of making products containing such aggregated calcium carbonate are further disclosed.
摘要:
An improved form of calcium carbonate which is acid resistant to enable its use as a filler material in the making of neutral to weakly acid paper, and a process for producing this acid resistant calcium carbonate are provided. This acid resistant calcium carbonate comprises a mixture of at least about 0.5 to about 10 percent of an aluminum salt, based on the dry weight of calcium carbonate, and calcium carbonate. Preferred aluminum salts are aluminum sulfate, aluminum chloride, and polyaluminum chloride.