Abstract:
The invention relates to a method for producing polyether alcohols by reacting a) aromatic amines with b) alkyl oxides in the presence of c) a catalyst, characterized in that the alkyl oxide b) contains at least 90 wt.% of propylene oxide with respect to the weight of the component b), and that an amine is used as the catalyst c).
Abstract:
The present invention relates to a dynamically evacuable, electrically operated apparatus comprising a contiguously evacuable region and a working region whose temperature can be controlled and which is thermally insulated by the contiguously evacuable region from the ambient temperature, and also a means for actively maintaining a vacuum so that the pressure in the contiguously evacuable region of the apparatus is constant over time within a prescribed pressure range, where the contiguously evacuable region makes up at least 20% by volume of the total volume occupied by a porous and/or cellular insulation material in the apparatus and the contiguously evacuable region comprises at least one organic aerogel and/or organic xerogel.
Abstract:
Disclosed is a method for producing fibers, in which a solution (I) containing polyurethane is spun into a coagulation bath. Said method is characterized in that polyurethane which is dissolved in ionic liquid is used as a solution (I).
Abstract:
The invention relates to a method for producing rigid polyurethane foam materials by reacting polyisocyanates with compounds containing at least two hydrogen atoms that are reactive with isocyanate groups in the presence of foaming agents.
Abstract:
The invention relates to a method for the hydrolysis of at least one isocyanate adduct, with a hydrolyzing agent, characterized in that the hydrolyzing agent contains water and at least one imidazole of the following structural formula, where R1 is a alkyl group having 1 to 5 carbon atoms, preferably 1 to 3 carbon atoms, more preferably 1 to 2 carbon atoms, and most preferably having one carbon atom, and R2, R3 and R4 independently of each other are hydrogen (H) or are alkyl groups having 1 to 5 carbon atoms, preferably 1 to 3 carbon atoms, more preferably 1 to 2 carbon atoms, and most preferably having one carbon atom. The invention further relates to the use of starting substances for the described method.
Abstract:
Polímero termoplástico preparado al menos a partir de diisocianato y diepóxido usando un catalizador, en donde el catalizador es un líquido iónico que comprende una o más sales con la siguiente fórmula (I): **(Ver fórmula)** en la cual n representa 1, 2, 3 o 4, [A]+ representa un catión de amonio cuaternario que contiene al menos un heterociclo de cinco a seis miembros, que tiene al menos un átomo de nitrógeno y opcionalmente un átomo de oxígeno o azufre, en la que el átomo de nitrógeno del heterociclo está cuaternizado con alquilo de C1-C18; y [Y]n- representa un anión mono, di, tri o tetravalente.
Abstract:
The present invention is directed to a composition which can produce elastomeric microcellular foam, preferably polyurethane foam having improved and well-balanced mechanical properties, comprising a polyisocyanate, a polyol, a lactam, a surfactant and a blowing agent, wherein said surfactant preferably comprises silicon oil, and wherein the polyol comprises polytetrahydrofuran, and a process to produce elastomeric microcellular polyurethane foam, and the use of the elastomeric microcellular polyurethane foam in footwear foam.
Abstract:
The invention relates to a method for producing highly functional polyetherols by reacting at least one trifunctional or higher functional alcohol and optionally further difunctional and/or monofunctional alcohols and/or modifying reagents with the help of acidic catalysts, the trifunctional or higher functional alcohol not being glycerol. The invention further relates to highly functional polyetherols that can be obtained by said method and to the use of said highly functional polyetherols as adhesion promoters, thixotropic agents, rheology modifiers of polymers, phase transfer reagents, microcontainers or nanocontainers for biolo-gically active substances, for example for medical active substances, biocides, herbicides or fungicides, as pigment dispersants, additives in printing inks, as components for producing polyaddition or polycondensation polymers or for treating seeds.