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 composite material, comprising at least one superabsorbent polymer and at least one elastic aminoplastic foam as a supporting material, to hygienic products, sealing materials, insulating substances, drying agents, water accumulators, packagings and artificial plant substrates, containing a composite material, and to a method for the production of a composite material that contains at least one elastic aminoplastic foam as a supporting material and at least one superabsorbent polymer, said method comprising the steps: A) providing an aqueous solution or dispersion that contains precursor compounds of the at least one elastic aminoplastic foam and optionally other additives; B) adding at least one superabsorbent polymer to the aqueous solution or dispersion of step A); and C) polymerizing the precursor compounds of the at least one elastic aminoplastic foam in the aqueous solution or dispersion of step B), in order to obtain the composite material by heating.
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:
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.
Abstract:
The invention relates to a tube which has been filled with an open-cell foam based on an aminoplastic, in particular on a melamine-formaldehyde condensate, and also to its uses, in particular as filter or static mixer.