摘要:
Metallic substrates having a deformable vitreous coating, obtainable by applying an alkali metal silicate-containing coating sol to the substrate and thermally densifying the layer thus obtained in a two-stage heat treatment process, the heat treatment being carried out, in the first stage, either (A) in an oxygen-containing atmosphere or (B) in a vacuum at a residual pressure of ≦15 mbar and, in the second stage, in a low-oxygen atmosphere up to full densification with formation of a vitreous layer.
摘要:
Metallic substrates having a deformable vitreous coating, obtainable by applying an alkali metal silicate-containing coating sol to the substrate and thermally densifying the layer thus obtained in a two-stage heat treatment process, the heat treatment being carried out, in the first stage, either (A) in an oxygen-containing atmosphere or (B) in a vacuum at a residual pressure of ≦15 mbar and, in the second stage, in a low-oxygen atmosphere up to full densification with formation of a vitreous layer.
摘要:
A method of manufacturing a substrate coated with a transparent, colored coating stable to high temperature and UV includes coating the substrate with a coating composition including at least one element which is able to form a vitreous, crystalline, or partially crystalline oxide, in the form of a compound which on heat treatment yields the oxide and is present as a sol or solution in an at least predominantly aqueous medium, as the matrix-forming component, and at least one member selected from the group consisting of metal colloids, metal compound colloids, metal alloy colloids, and metal compounds which form metal colloids under reducing conditions, as the coloring component; and heat-curing the resulting coating. Particularly suitable substrates are glass substrates, such as (halogen) lamp bulbs and gas discharge tubes.
摘要:
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.
摘要:
A process is described for preparing hydrolytically and hydrothermally stable, consolidated proppants, in which (A) a consolidant comprising a hydrolyzate or precondensate of at least one organosilane, a further hydrolyzable silane and at least one metal compound, where the molar ratio of silicon compounds used to metal compounds used is in the range from 10 000:1 to 10:1, is blended with a proppant or infiltrated or injected into the geological formation, and (B) the consolidant is cured under conditions of elevated pressure and elevated temperature.
摘要:
An insulation material comprising an inorganic, porous matrix, a process for producing it and its use are described. The moldings and coatings obtained therefrom display excellent insulation against heat and cold and can be used over a wide temperature range.
摘要:
Described is a consolidant comprising a hydrolyzate or precondensate of at least one organosilane and at least one metal compound, where the molar ratio of silicon compounds to metal compounds is in the range of from 10 000:1 to 10:1.The consolidant can be used for the hydrolysis-stable consolidation of porous or particulate materials to form moldings. The consolidant can be used for the hydrolysis-stable coating of substrates.
摘要:
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.
摘要:
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.
摘要:
A consolidation agent for moulded articles and geological formations from porous or particulate materials, containing a hydrolysate or precondensate of (a) at least one organosilane of the general formula (I) RnSiX4-n (I) in which the radicals R are identical or different and are not hydrolytically removable groups, the radicals X are identical or different and are hydrolytically removable groups or hydroxyl groups, and n is 1, 2 or 3, and optionally (b) at least one hydrolyzable silane of the general formula (II) SiX4 (II) in which the radicals X have the meaning defined above.
摘要翻译:含有(a)至少一种通式(I)的有机硅烷的水解产物或预缩合物的多孔或颗粒材料的成型制品和地质构造的固结剂<?在线公式描述=“在线公式” end =“lead”?> R&gt; SiX 4-n(I)<?in-line-formula description =“In-line Formulas”end =“tail” 其中基团R相同或不同并且不是可水解取代的基团,基团X是相同或不同的并且是可水解去除的基团或羟基,并且n是1,2或3,并且任选地(b)至少 一种通式(II)的可水解硅烷<?in-line-formula description =“In-line formula”end =“lead”→> SiX 4(II) 公式描述=“在线公式”end =“tail”?>其中基团X具有上面定义的含义。