Abstract:
The use of shaped bodies with length, width and height dimensions each in the range from 1 mm to 3 cm as dust binders in vacuum cleaners, wherein the shaped body/bodies is or are produced from chemically untreated open-cell foam with a density in the range from 5 to 500 kg/m3 and a mean pore diameter in the range from 1 µm to 1 mm.
Abstract:
The invention relates to a tube which has been filled with an open-cell foam based on an amino resin, especially a melamine/formaldehyde condensation product, and to its uses, especially as a filter or static mixer.
Abstract:
Disclosed are a silicate-based foamed material which has a density of less than 25 kg/m3, an SiO2:Al2O3 molar ratio of more than 20:1, and an SiO2:Me2O molar ratio of more than 50:1, wherein Me represents an alkali metal, the use thereof for heat insulation or sound-proofing purposes, and methods for the production thereof by mixing a dispersion of SiO2 particles that have an average diameter ranging from 1 to 100 nm with a surfactant and a foaming agent at temperatures below 50 °C and expanding said mixture by heating the same to a temperature ranging from 60 to 100 °C or by relieving the pressure.
Abstract:
Disclosed are a silicate-based foamed material which has a density of less than 25 kg/m3, an SiO2:Al2O3 molar ratio of more than 20:1, and an SiO2:Me2O molar ratio of more than 50:1, wherein Me represents an alkali metal, the use thereof for heat insulation or sound-proofing purposes, and methods for the production thereof by mixing a dispersion of SiO2 particles that have an average diameter ranging from 1 to 100 nm with a surfactant and a foaming agent at temperatures below 50 °C and expanding said mixture by heating the same to a temperature ranging from 60 to 100 °C or by relieving the pressure.
Abstract translation:公开了密度小于25kg / m 3,SiO 2 :Al 2 O 3摩尔比大于20:1,SiO 2 :Me 2 O摩尔比大于50:1的硅酸盐基发泡材料,其中Me代表 碱金属,其用于隔热或隔音的目的,以及通过将平均直径为1-100nm的SiO 2颗粒的分散体与表面活性剂和发泡剂在低于200℃的温度下混合来生产它们的方法 50℃并且通过将所述混合物加热至60至100℃的温度或通过释放压力来膨胀所述混合物。
Abstract:
The invention relates to the use of molded bodies as dust-binding means in vacuum cleaners. The molded bodies according to the invention have length/width/height dimensions ranging from 1 mm to 3 cm, at least one dimension being larger than 5.5 mm, and are produced by treating (a) an open-cell foam material having a density ranging from 5 to 500 kg/m3 and a mean pore diameter ranging from 1 μm to 1 mm (b) with an aqueous formulation of at least one compound having at least one hemiaminal group or aminal group per molecule or at least one copolymer which contains at least one OH group- or β-dicarbonyl group- or epoxy group-containing comonomer polymerized into it, (c) and a shaping step.
Abstract:
The invention relates to a method for the production of an abrasive foam on the basis of a melamine-formaldehyde-condensation product comprising inorganic nanoparticles, with the following steps: (1) Producing a solution or dispersion comprising a precondensate of the foam to be produced and inorganic nanoparticles, (2) foaming the precondensate by heating the solution or dispersion from step (1), in order to obtain a foam comprising inorganic nanoparticles, and if applicable (3) tempering the foam obtained in step (2), which leads to an increased abrasion when polishing delicate surfaces.
Abstract:
The invention relates to a method for coating a molded foam part with a plastic film, characterized in that a) the molded foam part is arranged in a capsule and fastened, the plastic film being interposed between the capsule wall and the molded foam part, b) the air in the chamber between the plastic film and the molded foam part is evacuated, c) thereby pressing the plastic film onto the molded foam part, and a vacuum is maintained during the pressing step. The invention also relates molded foam parts that are accessible for the first time by using said method and to the use of said molded foam parts.
Abstract:
The present invention relates to a method for the production of a foam comprising at least one antimicrobial active agent, comprising the following steps: (1) producing a solution or dispersion comprising at least one pre-condensate 10 of the foam to be produced, and at least one antimicrobial active agent, (2) foaming the pre-condensate by heating the solution or dispersion from step (1) in order to obtain a foam having at least one antimicrobial active agent, and (3) tempering the foam obtained in step (2) at a temperature of 120 to 300°C. The invention further relates a foam produced in this manner, a molded part comprising such a foam, and the use of such a foam for the heat and sound insulation of buildings and building parts, for the heat and sound insulation of the interior spaces of vehicles and aircraft, for low temperature insulation, as an insulating wall covering, as an insulating and impact damping packaging material, as abrasively acting cleaning, grinding, and polishing sponges, in the hygiene sector, and as filter material.
Abstract:
The invention relates to a method for obtaining water for domestic use by the condensation of mist on the webs of an open-cell aminoplast-based foam and/or to a method for obtaining water for domestic use by the evaporation of water containing salt or impurities from the cells of an open-cell aminoplast-based foam and by the condensation of the evaporated water. The open-cell foam is produced from a melamine/formaldehyde condensation product with a molar ratio of melamine to formaldehyde ranging between 1:1 and 1:5.
Abstract:
The invention relates to a multi-layered foamed composite element having a total thickness d, comprising at least three layers of open-celled foam. At least one of the inner layers comprises recesses and both external layers do not have recesses. The composite element is characterised in that i) the volume of the recesses is 20 to 70 vol % in the internal layer comprising the recesses, and ii) the thickness of the layer comprising the recesses is 20 to 80% of the total thickness d.