Abstract:
PROBLEM TO BE SOLVED: To provide a process for producing cationically stabilized precipitated silicic acid dispersions which does not have at least some of the disadvantages of the processes known from the prior art, and to provide cationically stabilized precipitated silicic acid dispersions which does not have at least some of the disadvantages of the prior art silicon dioxide dispersions or only has a low degree. SOLUTION: The process for producing stable aqueous dispersions of precipitated silicic acid comprises producing a preliminary dispersion of at least one precipitated silicic acid and supplying the preliminary dispersion to a grinding device for grinding, and wherein, in the course of the process, at least parts of the surface of the precipitated silicic acid particles and/or of the surface of the precipitated silicic acid particles newly generated during the grinding are coated with at least one aminosilane in such a way that the aminosilane is bonded covalently to the precipitated silicic acid particles via an Si-O-Si bond. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
Aqueous dispersion containing transition aluminium oxide as only solid and a dispersant, in which - the transition aluminium oxide is present in the form of aggregates of primary particles, the content of transition aluminium oxide in the dispersion is from 40 to 65% by weight, the aggregates in the dispersion have a mean aggregate diameter of less than 100 nm, - the dispersant contains polyaluminium hydroxychloride, polyaluminium hydroxynitrate and/or polyaluminium hydroxysulphate, the dispersion has a pH of from 3 to 5.
Abstract:
A dispersion containing a high-surface-area, pyrogenically-produced aluminium oxide with a surface area and BET of more than 115 m /g and a Sears number of more than 8 ml/2g, is produced by mixing a high-surface-area, pyrogenically-produced aluminium oxide having a BET specific surface area of more than 115 m /g and a Sears number of more than 8 ml/2g, with water, setting a pH value of 2 to 11 (preferably 3 to 8) and dispersing the mixture by the introduction of controlled shearing forces. It can be used for the production of Inkjet media, digital imaging products and other printing media.
Abstract:
Die Erfindung betrifft eine Zusammensetzung und Verfahren zu ihrer Herstellung, umfassend quartäre, aminofunktionelle, siliciumorganische Verbindungen, insbesondere in Form von Oligomeren und Polymeren, die teilweise hydrolysiert bis vollständig hydrolysiert vorliegen können und insbesondere wasserlöslich sind, einen geringen VOC-Anteil aufweisen sowie deren Verwendung.
Abstract:
Dispersion obtainable by reacting a) in 50 to 75 parts by weight of water b) 25 to 50 parts by weight of silica particles having a BET surface area of 30 to 500 m2/g and c) 100 to 300 µg/m2 BET surface area of the silica particles from b) parts by weight of one or more aminofunctional, organosilicon compounds, the aminofunctional, organosilicon compound being a quaternary, aminofunctional, organosilicon compound which is obtainable by reacting at least one haloalkylfunctional silane as component A with a tertiary amine as component B in the presence of a defined amount of water and at least partly removing the resulting hydrolysis alcohol from the system.
Abstract:
A dispersion containing a high-surface-area, pyrogenically-produced aluminium oxide with a surface area and BET of more than 115 m2/g and a Sears number of more than 8 ml/2 g, is produced by mixing a high-surface-area, pyrogenically-produced aluminium oxide having a BET specific surface area of more than 115 m2/g and a Sears number of more than 8 ml/2 g, with water, setting a pH value of 2 to 11 (preferably 3 to 8) and dispersing the mixture by the introduction of controlled shearing forces. It can be used for the production of Inkjet media, digital imaging products and other printing medium.
Abstract:
A dispersion containing a high-surface-area, pyrogenically-produced aluminiu m oxide with a surface area and BET of more than 115 m2/g and a Sears number o f more than 8 ml/2g, is produced by mixing a high-surface-area, pyrogenically- produced aluminium oxide having a BET specific surface area of more than 115 m2/g and a Sears number of more than 8 ml/2g, with water, setting a pH value of 2 to 11 (preferably 3 to 8) and dispersing the mixture by the introductio n of controlled shearing forces. It can be used for the production of Inkjet media, digital imaging products and other printing media.