摘要:
The present invention refers to a process for bacterial stabilizing aqueous preparations like e.g. calcium carbonate slurries and a composition which can be used for the biocidal treatment of such aqueous preparations.
摘要:
The invention relates to the preparation of an aqueous suspension of mineral matter by dispersion and/or grinding in the presence of at least one amine and one vinyl-carboxylic polymer, with the amine allowing to reduce the amount of the polymer and the use of the resulting suspension.
摘要:
Process to prepare a precipitated calcium carbonate (PCC) comprising the following steps: (i) providing CaO, which is optionally partially or fully slaked (hereafter “calcium source”); ({umlaut over (υ)}) providing a CO2-comprising gas; ({umlaut over (υ)}i) contacting said calcium source of step (i) and said CO2-comprising gas of step (ii) in an aqueous environment in a reactor, in one or more steps; (iv) obtaining a PCC-comprising suspension; (v) optionally concentrating said PCC-comprising suspension of step (iv); (vi) optionally adding dispersing additives to the suspension of step (iv) and/or (v); (vii) optionally grinding the product of step iv, v or vi.
摘要:
The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.
摘要:
The present invention relates to a process for the production of a surface-treated calcium carbonate, the use of this surface-treated calcium carbonate in a process for the control of organic material in an aqueous medium, as well as to a composite of surface-treated calcium carbonate and organic material, such as a composite of surface-treated calcium carbonate and to the use of such a composite.
摘要:
The present invention relates to the use of surface modified calcium carbonate as a filler in adhesives, sealants, and/or caulks, wherein the surface modified calcium carbonate is a mineral pigment product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the said carbonate with gaseous CO2 formed in situ and/or coming from an external supply, and the reaction product or products of the said carbonate with one or more moderately strong to strong H3O+ ion donors, and at least one aluminum silicate and/or at least one synthetic silica and/or at least one calcium silicate and/or at least one silicate of a monovalent salt and/or at least one aluminum hydroxide and/or at least one sodium and/or potassium aluminate. It further relates to method of producing adhesives, sealants, and/or caulks comprising surface modified calcium carbonate, as well as to the adhesives, sealants, and/or caulks obtained by this process.
摘要:
The invention concerns a process for disinfection and/or conservation and/or reduction and/or control of microbial contamination of aqueous dispersions and/or aqueous suspensions of mineral matter, providing satisfactory stability in terms of Brookfield™ viscosity for the said aqueous dispersions and/or suspensions of mineral matter. It also concerns the said aqueous dispersions and/or suspensions thus obtained, together with their uses in the mineral, paper and paint industries. Finally it concerns the end products obtained.
摘要:
The present invention provides a process for dry grinding one or more mineral materials which include at least calcium carbonate. The process includes a) crushing the mineral material or materials in at least one crushing unit until a crushed material is obtained with a d95 of less than 10 cm, and dry grinding the material in at least one grinding unit (i) in the presence of at least one comb-type hydrophilic polymer containing at least polyalkylene oxide function grafted on to at least one unsaturated ethylene monomer, and (ii) in such a manner that the quantity of liquid in the grinding unit is less than 15% by dry weight of the material crushed in the crushing unit, wherein recovered material has a d50 of 0.5 to 500 microns.
摘要:
The present invention provides a product obtained by a method of dry milling a mineral material in at least one milling unit: (i) in the presence of at least one polyalkylene glycol polymer having monomer units forming a backbone, where at least 90% of the monomer units forming the backbone of the polymer are constituted by ethylene oxide, propylene oxide or their mixtures, and where the polymer has a molecular weight of at least equal to 400 g/mole, and (ii) in a quantity of water that is less than 10% in dry weight of the material in the milling unit.
摘要:
The object of the invention consists of a process for the manufacture of aqueous suspensions of calcium carbonate using an acrylic polymer with an average by weight molecular weight of between 8,000 g/mole and 15,000 g/mole and a molar content of less than 20% of polymeric chains of molecular weight less than 3,000 g/mole. It also concerns the aqueous suspensions obtained, possibly dried, and their uses in the paper, paint, plastics and mastics industry.