摘要:
The utilization of ethoxylated polyethyleneamines for addition to aqueous dispersions of pyrogenically prepared silicon dioxide in order to obtain an increase of the thickening action thereof.
摘要:
Pyrogenically prepared, surface modified aluminum oxide, having the following physical chemical properties: Surface area [m2/g] 50 to 150 Tamped density [g/L] 25 to 130 Drying loss [%]less than 5 Loss on ignition [%]0.1 to 15 C content [%]0.1 to 15 pH value3 to 9 is prepared by treating pyrogenically prepared aluminum oxide with a surface modifying agent.
摘要:
Pressed objects (slugs) of pyrogenically produced oxides such as SiO.sub.2, Al.sub.2 O.sub.3 and TiO.sub.2 are produced using a silica sol and water. As molding assistants thereby there is employed a polyhydric alcohol, e.g. glycerine or sorbitol. The water can be added adsorbed on a pyrogenically produced hydrophobized silica. The pressed object obtained can be used inter alia as catalyst carrier.
摘要:
Silanised, structurally modified silicas, characterised by groups fixed on the surface, the groups being alkylsilyl (SiCnH2n+1, with n=2-18). They are produced in that pyrogenically produced silicas are treated with the silanising agent and structurally modified. They are used to improve scratch resistance in lacquers.
摘要翻译:硅烷化的结构改性二氧化硅,其特征在于固定在表面上的基团,所述基团是烷基甲硅烷基(n为2-18的烷基硅烷基)(SiC n H 2n + 1)。 它们的生产是用热解法生产的二氧化硅用硅烷化剂处理并进行结构改性。 它们用于改善漆中的耐刮擦性。
摘要:
Radiation-curing coating systems which contain a silanized silica, where the silane is hexamethyldisilazane, 3-methacryloxypropyltrialkoxysilane and/or glycidyloxypropyltrialkoxysilane as the silanizing agent. The radiation-curing coating systems can be used for coating derived timber boards, solid wood, wood veneers, parquet, decorative papers, decorative films, thermoplastics and thermosetting plastics, mineral and polymeric glasses, metals (for example aluminium, high-grade steel, phosphated, chromated and galvanized steel sheets, copper), lacquered surfaces, printing inks and leather.
摘要:
A boron oxide-silicon dioxide mixed oxide which has a BET surface of less than 100 m.sup.2 g, and optionally containing oxides of aluminium, titanium or zirconium, is prepared pyrogenically by flame hydrolysis. The mixed oxide is used in glass making.
摘要:
A surface-modified, aerogel-type, structured silica is produced by spraying an aerogel-type, structured silica with a silanizing agent, post-mixing and conditioning. It can be used as a flatting agent.
摘要:
Functionalized silicas with 3-methacryloxypropylsilyl and/or glycidyloxypropylsilyl groups on the surface are prepared by mixing the silicas with the silane and heat-treating the mixture. The silicas are employed, for example, in solvent-containing coatings.
摘要:
The silanized, pyrogenically prepared silicic acids are prepared by treating pyrogenically prepared silicic acids with an organosilane selected from the group (RO).sub.3 SiC.sub.n H.sub.2n+1, in which n--from 10 to 18 and R stands for an alkyl.
摘要翻译:硅烷化的热解法制备的硅酸通过用选自(RO)3 SiCnH 2 n + 1的有机硅烷处理热解制备的硅酸来制备,其中n为10至18,R为烷基。
摘要:
Functionalized, structurally modified silicas with 3-methacryloxypropylsilyl and/or glycidyloxypropylsilyl groups on the surface are prepared by mixing the silicas with the silane and heat-treating, destructuring and grinding the mixture. The silicas are employed in radiation-curing coatings.