Abstract:
A process for the preparation of hydrolytically and hydrothermally stable consolidated proppants is described, in which (A) a consolidating agent comprising (A1) a hydrolysate or precondensate of at least one functionalized organosilane, a further hydrolyzable silane and at least one metal compound, the molar ratio of silicon compounds used to metal compounds used being in the range of 10 000:1 to 10:1, and (A2) an organic crosslinking agent are mixed with a proppant and (B) the consolidating agent is cured at elevated pressure and elevated temperature.The consolidated proppants obtained have high mechanical strength.
Abstract:
A cationically polymerizable composite coating composition comprising: a) a condensation product of at least one hydrolyzable silane having a fluorine-containing group, b) at least one cationically polymerizable organic resin, and c) a cationic initiator, provides, upon curing, substrates with an alkali-resistant, liquid-repellent coating. The composite coating composition may be used in pattern forming methods.
Abstract:
A process for a consolidation which is hydrolytically stable under hydrothermal conditions and/or for changing the wetting behavior of a porous and/or particulate geological formation. The process comprises introducing into the geological formation a consolidant and curing the introduced consolidant under elevated pressure and elevated temperature. The consolidant comprises a hydrolyzate and/or a precondensate based on silanes and metal compounds.
Abstract:
An ink jet head is formed with a nozzle surface having a liquid repellent characteristic. The nozzle surface comprises a condensation product made from a hydrolyzable silane compound having a fluorine containing group and a hydrolyzable silane compound having a cationic polymerizable group.
Abstract:
A regeneratable plate having a structured surface comprising hydrophilic and hydrophobic regions. The plate comprises a substrate, a first layer comprising a hydrophilic oxidation catalyst arranged on the substrate, and a second layer which is hydrophobic and is imagewise arranged on the first layer to thereby afford the structured surface comprising hydrophobic regions and hydrophilic regions. A process for making the plate by imagewise exposure is also described.
Abstract:
The invention relates to solid or gel-type nanocomposite material which can be polymerised, containing a) 4.9 95.9 wt. % of a soluble polymer; b) 4-95 wt. % of a partially or totally condensed silane selected from the group of epoxyalkoxysilanes, alkoxysilanes and alkylalkoxysilanes, the silane having an inorganic condensation degree of between 33-100% and an organic conversion degree of between 0-95%; c) 0-60 wt. % of an acrylate; d) 0.1-50 wt. % of surface modified nanometric particles selected from the group of oxides, sulphides, selenides, tellurides, halogenides, carbides, arsenides, antimonides, nitrides, phosphides, carbonates, carboxylates, phosphates, sulphates, silicates, titanates, zirconates, aluminates, stannates, plumbates and a mixed oxides; e) 0-50 wt.-% of a plasticizer; f) 0-5 wt. % of a thermal or photochemical cross-linking initiator, sensitizer, auxiliary wetting agent, adhesive agent, antioxidant, stabiliser, coloring agent, photochrome material and thermochrome material in relation to the total weight (dry weight) of the nanocomposite material.
Abstract:
Substrates comprising a photocatalytic layer containing TiO2 are produced using TiO2 particles which may optionally be doped with metallic or non-metallic elements or compounds. The photocatalytic layer exhibits a concentration gradient of the TiO2 particles. An organically modified inorganic hybrid layer may be provided between the substrate and the photocatalytic layer.
Abstract:
Magnetic particles are prepared containing a magnetic core coated with a glass layer having a substantially pore-free glass surface or having pores with a diameter of less than 10 nm. The particles are used for separating biological material such as nucleic acids. A preferred process of preparing the particles is by forming a mixture of magnetic cores with a sol formed from an alcohol and a metal alkoxide, spray-drying the mixture to coat the cores with a layer of gelled sol, and heating the coated cores to obtain the magnetic glass particles. Preferably, the particles have an average particle size of less than 100 μm. The magnetic core may be a composite material containing a mica core and magnetite particles immobilized on the mica core, and the glass layer may contain boron oxide. Magnetic core materials include magnetite (Fe3O4) and Fe2O3.
Abstract translation:制备磁性颗粒,其包含涂覆有具有基本无孔玻璃表面或具有小于10nm直径的孔的玻璃层的磁芯。 颗粒用于分离生物材料如核酸。 制备颗粒的优选方法是通过用由醇和金属醇盐形成的溶胶形成磁芯的混合物,喷雾干燥混合物以用一层凝胶溶胶涂覆芯,并加热涂覆的芯以获得 磁性玻璃颗粒。 优选地,颗粒的平均粒度小于100μm。 磁芯可以是包含固定在云母芯上的云母芯和磁铁矿颗粒的复合材料,并且玻璃层可以含有氧化硼。 磁芯材料包括磁铁矿(Fe 3 O 4 O 4)和Fe 2 O 3 O 3。
Abstract:
The invention relates to a composition for producing abrasion-resistant and alkali-resistant layers or moulded bodies having a low-energy surface, said composition comprising a) a hardenable binder system containing at least one organic polymer or oligomer comprising at least one functional group, or a precursor thereof, b) at least one fluorine-containing polymer or oligomer containing at least one functional group that can react with a functional group of the binder system, and c) inorganic particles, and to the products thus obtained. The coatings and moulded bodies obtained are especially suitable for surfaces to be kept clean.
Abstract:
The invention is related to a centrifugal pump with an existing pump housing made of plastic material that can be processed through injection molding, having a first housing section, featuring a suction nozzle and a pressure nozzle, a second housing section supporting an electronically commutated DC motor and a split case, a motor housing section that closes a dry chamber separated from a wet chamber by the split case in which a stator and an electronic component are arranged, and a permanent magnet rotor that is mounted in the wet chamber in such a way that it can rotate, and drives a pump impeller that reaches into the pump chamber. The electronic components are arranged on an electronic circuit board aligned at right angles to an axle and parallel to a base of the split case. The electronic circuit board is in heat conducting contact with the base. The task of the invention is to cool electronic components sensitive to heat in a simple way and with a high degree of efficiency such that a simple installation of the electronic components is guaranteed and only a small number of parts is required, the construction space being as small as possible. According to the invention, this problem is solved by the fact that one or several conductors of the electronic circuit board are in heat conducting contact with the base.