摘要:
A process for joining two solid bodies, in particular of silicon. via the substantially smooth surfaces that have first of all been coated with a monomolecular layer of a sulfur-containing organosilane, and the resultant solid bodies, which may be used in microelectronics or micromechanics.
摘要:
Aluminum oxide dispersion, which is stable in a pH range 5 from 5 to 9 and has an aluminum oxide content of at least 40 wt. %, obtainable by dispersing pyrogenically produced aluminum oxide particles in an aqueous phase, wherein one or several at least dibasic hydroxycarboxylic acids present dissolved in the dispersion and at least one salt of a 10 dialkali metal hydrogen phosphate and/or alkali metal dihydrogen phosphate are added to the aqueous phase each mutually independently in a quantity of 0.3−3×10−6 mol/m2 of aluminum oxide specific surface area.
摘要翻译:氧化铝分散体,其在5至9的pH范围内稳定,并且具有至少40重量%的氧化铝含量。 通过将热解产生的氧化铝颗粒分散在水相中可获得的,其中加入溶解在分散体中的一种或几种至少二元羟基羧酸和至少一种10碱式金属磷酸氢盐和/或碱金属磷酸二氢盐的盐 相对于水相,各自相互独立地为0.3-3×10 -6 mol / m 2的氧化铝比表面积。
摘要:
The present invention relates to the use of a composition in coating agents, which is poor in volatile organic compounds (VOC) or essentially free of VOC, wherein the composition is at least partially based on one or more partially or fully hydrolyzed and optionally condensed or co-condensed aminoalkyl- and oligosilylated-aminoalkyl-, alkoxy- or hydroxy-functional silicon compounds and the alcohol is at least partially removed from the composition. The invention also relates to a composition containing aminoalkyl- or oligosilylated-aminoalkyl-, hydroxy- and optionally alkoxy-functional silicon compounds and to a method for producing such a composition.
摘要:
Stable, pourable silicon dioxide dispersion, in which the average, number-related aggregate diameter of the silicon dioxide particles in dispersion is less than 200 nm, and which comprises at least 35 wt. % of a silicon dioxide powder, 3 to 35 wt. % of at least one polyol, 20 to 60 wt. % of water, 0 to 10 wt. % of an additive and a substance having an alkaline action in an amount such that a pH of 10
摘要:
Ink jet ink containing at least one pigment and at least one oxidized carbon black.The ink jet ink is prepared in a process wherein the pigment is dispersed in at least one solvent, followed by addition of the oxidized carbon black and renewed dispersing.The ink jet ink can be used for printing textiles, metal, foil, film, sheet, glass and paper.
摘要:
Stable, pourable silicon dioxide dispersion, in which the average, number-related aggregate diameter of the silicon dioxide particles in dispersion is less than 200 nm, and which comprises at least 35 wt. % of a silicon dioxide powder, 3 to 35 wt. % of at least one polyol, 20 to 60 wt. % of water, 0 to 10 wt. % of an additive and a substance having an alkaline action in an amount such that a pH of 10
摘要:
Process for preparing ultrafine powders based on polyamides by contacting polyamides having a relative solution viscosity ηrel in the range from 1.5 to 2.0, measured in 0.5% m-cresol solution at 25° C., with an alcoholic medium in the presence of inorganic particles under the action of pressure and/or temperature to generate an at least partial solution, and then precipitating the polyamide from the at least partial solution, characterized in that a suspension of the inorganic particles suspended in the alcoholic medium is used. The resulting ultrafine polyamide powders have a specific BET surface area in the range of 5-100 m2/g; a fineness d50 of less than 70 μm; an apparent density AD in the range from 250 to 1000 g/l; and a particle content of 0.1 to 80% by weight of inorganic particles based on the total weight of the polyamide powder. They are equally suitable for coatings and for mouldings and components with improved mechanical properties.
摘要:
Aqueous dispersion which comprises hydrophobized silicon dioxide powder with a content of between 5 and 50 wt. % and which comprises at least one compound of the general formula R & supl; —COO—(CH2-CH(Ph)—O)a-(CnH2n-xR2xO)b-R3 (I). It is prepared by dispersing the hydrophobic silicon dioxide powder, dispersing agent and optionally pH-regulating substances and further additives in an aqueous medium. It can be employed as an additive to waterborne fillers in the automobile industry, as a coating constituent in can and coil coating processes, as an additive in water-based UV-curable formulations e.g. for wood preservation and as a constituent of protective lacquer films.
摘要翻译:水分散体,其包含含量为5至50重量%的疏水化二氧化硅粉末。 %,并且其包含至少一种通式R 1和R 2的化合物; -COO-(CH 2 -CH(Ph)-O)a - (C n H 2n-x R 2 x O)b -R 3(I)。 通过将疏水性二氧化硅粉末,分散剂和任选的pH调节物质和其它添加剂分散在水性介质中来制备。 它可以用作汽车工业中的水性填料的添加剂,作为罐和线圈涂布方法中的涂料组分,作为水基紫外线固化型配方中的添加剂。 用于木材保护和作为保护漆膜的组成部分。
摘要:
A stable, aqueous dispersion, which includes: silicon dioxide mixed-oxide particles dispersed in at least one water-soluble cationic polymer having a mass average molar mass of less than 100,000 g/mol, said mixed-oxide including aluminum oxide or titanium dioxide, wherein said particles are produced by flame hydrolysis, wherein said particles have a BET specific surface area of 5 to 600 m2/g and a negative zeta potential, and wherein the dispersion has a positive zeta potential.
摘要:
A finely divided, stable dispersion of a solid is produced by: spraying at least two streams of a preliminary dispersion, each through a separate nozzle by pumps, onto a collision point in a reactor chamber enclosed by a reactor housing; passing water vapor through an opening into the reactor chamber so that a vaporous atmosphere consisting mainly of water vapor prevails in the reactor chamber; and removing the finely divided dispersion and a) vapor, b) partially condensed vapor consisting mainly of water or c) a combination of a) and b) from the reactor chamber by excess pressure of an incoming water vapor on the gas inlet side; wherein the solid has an average particle size of from 10 nm to 10 μm.