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 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:
The invention relates to a method for manufacturing a composite element containing a single-piece or multi-piece core and a cover which are frictionally connected to each other, said method at least involving: providing a single-piece or multi-piece core made of an organic material that can be evacuated; at least partially covering the core with a cover so as to obtain a composite element precursor; and treating the composite element precursor for a certain duration such that the organic material that can be evacuated and the surface of the cover that is in contact with the core soften at least partly. The invention further relates to composite elements obtainable or obtained according to a disclosed method as well as to the use of a disclosed composite element as a vacuum insulation panel or thermal insulation material.
Abstract:
The invention relates to a porous material containing at least one multifunctional isocyanate (a1) and at least one multifunctional substituted aromatic amine (a2-s) according to the general formula (I), where R1 and R2 are selected from hydrogen and linear or branched alkyl groups having from 1 to 6 carbon atoms, and where all substituents Q1 to Q5 and Q1' to Q5' are selected from hydrogen, a primary amino group, and a linear or branched alkyl group having from 1 to 12 carbon atoms, wherein at least one of Q1, Q3, and Q5 and at least one of Q1', Q3', and Q5' is a primary amino group, and the compound comprises at least one linear or branched alkyl group having from 1 to 12 carbon atoms in the a-position to at least one primary amino group bonded to the aromatic core. The invention further relates to a method for producing porous materials, to the porous materials that can be thus obtained, and to the use of the porous materials as insulating material and in vacuum insulation panels.
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.