Abstract:
Melamine/formaldehyde foams which contain 0.01 to 45% by weight of a particulate filler having a median particle diameter in the range from 5 µm to 3 mm, wherein the % by weight is based on the total weight of the melamine/formaldehyde precondensate and filler used for the foam production.
Abstract:
Disclosed is a layered composite system comprising one or several layers A) made of an open-cell foam based on an aminoplast, and one or several layers B) made of nonwoven fabric or fibrous tissue. Layer B contains melamine fibers. Also disclosed are production methods and the use of the inventive layered composite system as a cleaning sponge or protective support.
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 liquid-impregnated foamed plastic part consisting of a) between 1 and 10 % by volume of an aminoplastic-based, open-pored foamed plastic and b) between 90 and 99 % by volume of a component that is liquid at 25°C, such as aromatic or aliphatic hydrocarbons, alcohols, ketones, water or aqueous dispersions, and to the uses of said part for transporting or metering liquids, for freeze-explosion purposes, for projectile energy absorption or as a latent heat accumulator.
Abstract:
Espuma híbrida, que contiene un material soporte y una espuma obtenida a partir de resinas reactivasespumables, accesible introduciéndose la resina reactiva espumable en el material soporte, y espumándose, y encaso dado temperándose a temperaturas por encima de la temperatura de ebullición del agente de propulsión,caracterizada porque como materiales soporte se emplean resinas de poliuretano, resinas de poliéster, epóxidos, osus mezclas, o fibras minerales, animales, vegetales y químicas, naturales o sintéticas, así como vellones ymateriales tejidos a partir de estas fibras, y porque las resinas reactivas espumables comprenden una resina demelamina/formaldehído.
Abstract:
Use of moldings whose length width height dimensions are always in the range from 1 mm to 3 cm, at least one dimension being greater than 5.5 mm, produced by treatment of (a) open-cell foam whose density is in the range from 5 to 500 kg/m3 and whose average pore diameter is in the range from 1 mum to 1 mm (b) with an aqueous formulation of at least one compound having at least one hemiaminal or aminal group per molecule or at least one copolymer containing at least one copolymerized comonomer which contains OH groups or which contains beta-dicarbonyl groups, or which contains epoxy groups, (c) and a shaping step, as dust binders in vacuum cleaners.
Abstract:
An electrochemical element which comprises an open-cell foam based on a melamine/formaldehyde foam, the cell pores being completely or partly filled with a flowable electrolyte and a process for the production of a battery, accumulator or fuel cell.
Abstract:
The present invention relates to a process for the production of workpieces, wherein (a) pieces of open-cell aminoplast foam having an average diameter in the range from 50 mum to 5 mm (weight average) (b) are mixed with at least one film-forming polymer, subjected to a shape-imparting step and then dried.
Abstract:
Método para preparar una espuma de silicato espumando una mezcla que contiene 10 a 90 % en peso de una dispersión acuosa de partículas de SiO2 A), las cuales tienen un diámetro de partícula promedio en el rango de 1 a 100 nm, 1 a 45 % en peso de un polímero B) con funciones amino disuelto en agua 5 a 50 % en peso de un agente propelente C) 1 a 5 % en peso de un emulsionante D) 0,01 a 5 % en peso de un agente de reticulación E) capaz de reaccionar con el polímero B), en cuyo caso los porcentajes en peso de los componentes A) y B) se refieren al sólido y la suma de A) hasta E) da como resultado 100 % en peso.
Abstract:
A process for producing an elastic silicate foam by foaming a mixture comprising 10% to 80% by weight of an aqueous dispersion of SiO2 particles A) which have an average particle diameter in the range from 1 to 100 nm, 5% to 30% by weight of a polymer B) in solution in water, 10% to 50% by weight of a blowing agent C), 1% to 5% by weight of an emulsifier D), 0.01% to 5% by weight of a crosslinker E) which is reactive with the polymer B), and also the foam obtainable by the process, and the use of the foam.