Abstract:
The invention relates to flexible, flat substrates having an abrasive surface, characterised in that they can be obtained by applying an aqueous solution or dispersion of at least one pre-condensate of a thermocurable resin on the upper and/or lower side of a flexible, flat substrate, in an amount of at least 5 to 90% in weight in relation to the non-coated, dry substrate, the pre-condensate is cross-linked and the treated substrate is dried.
Abstract:
The present invention relates to conductive organic polymer gels, a process for preparing them, the use of the conductive organic polymer gels as solid electrolytes in electrochemical applications and also portable batteries, galvanic elements, accumulators or fuel cells which comprise these conductive organic polymer gels as solid electrolytes, as such. The present invention further relates to the production of nanoporous polymer foams comprising these conductive organic polymer gels.
Abstract:
A process is described for manufacture of packaging, wherein the packaging surface is coated with a polyelectrolyte complex and wherein the polyelectrolyte complex consists of at least one first polymer and at least one second polymer, wherein the first polymer is an anionic polymer and the second polymer is a cationic polymer. The packagings are characterized by good grease barrier properties.
Abstract:
The invention relates to the use of polyelectrolyte complexes in order to provide an oxygen barrier for packaging materials made of polymer films. Polymer construction components of the polyelectrolyte complex are applied to the polymer film in a polymerized form. The polymer film is coated either with an aqueous dispersion comprising a dispersed polyelectrolyte complex and produced through water-in-water emulsion polymerization, or with a composition comprising a polyelectrolyte complex produced from an anionic polymer and cationic tenside, or the polymer film is coated with at least three alternating layers, wherein one each of two adjacent layers comprises an anionic polyelectrolyte construction component and the other of the two adjacent layers comprises a cationic polyelectrolyte construction component, and polyelectrolyte complexes form on the mutually adjacent boundaries of the alternating layers.
Abstract:
The present invention relates to a process for the preparation of thermally conducting polymer-composites, comprising at least one thermally conducting compound in the form of particles and at least one polymer, comprising the steps: (A) providing an aqueous dispersion of at least one thermally conducting compound, (B) addition of the at least one polymer or precursors of the at least one polymer to the aqueous dispersion of step (A), in order to obtain an aqueous dispersion comprising at least one thermally conducting compound, at least one polymer in dispersed form or precursors of the at least one polymer and optionally at least one polymerisation initiator, (C) optionally polymerisation of the precursors of the at least one polymer in aqueous dispersion obtained in step (B), in order to obtain at least one polymer in dispersed form, (D) removal of the dispersion medium of the aqueous dispersion obtained in step (B) or (C), in order to obtain a polymer-composite.
Abstract:
The invention relates to a porous gel comprising the following components in reacted form: (a1) at least one multifunctional isocyanate, (a2) at least one multifunctional aromatic amine and (a3) at least one polyalkylene polyamine. The invention further relates to a method for producing porous gels, to the porous gels obtained in this way, and to the use of the porous gels as insulation material and in vacuum insulation panels.
Abstract:
Process for preparing porous polyisocyanate polyaddition products by reacting (a) isocyanates with (b) isocyanate-reactive compounds in the presence of (f) solvent, characterized in that isocyanate-reactive compounds used as (b) are compounds having a functionality with respect to isocyanates of at least 6 and a molecular weight of at least 1000 g/mol.
Abstract:
Gel poroso que contiene los siguientes componentes, en forma reaccionada: (a1) por lo menos un isocianato polifuncional, (a2) por lo menos una amina aromática polifuncional seleccionada de 4,4'-diaminodifenilmetano, 2,4'-diaminodifenilmetano, 2,2'-diaminodifenilmetano y diaminodifenilmetano oligomérico, y (a3) por lo menos una polialquilenpoliamina.
Abstract:
Procedimiento para la obtención de una espuma de polímero nanoporosa con un diámetro de poro medio en el intervalo de 10 a 1000 nm, que comprende las etapas: a) puesta a disposición de una disolución de una resina reactiva de policondensación en un disolvente orgánico, b) mezclado de la disolución con un catalizador de endurecimiento reactivo para la resina reactiva de policondensación y endurecimiento de los componentes reactivos bajo formación de un gel, y c) eliminación del disolvente orgánico.