摘要:
The invention relates to a composite element comprisinga) a core made of a foam or of a porous material,b) an outer layer applied to the core a), and,c) a foil c) made of a thermoplastic and differing from the outer layer b).
摘要:
The present invention relates to a dynamically evacuable, electrically operated device comprising a coherently evacuable region and a temperature-controllable useful region, which is thermally insulated from the ambient temperature by the coherently evacuable region, and also a means for actively maintaining a vacuum, such that the pressure in the coherently evacuable region of the device is constantly within a defined pressure range, said coherently evacuable region making up at least 20% by volume of the total volume which is occupied by a porous and/or cellular insulating material in the device, and said coherently evacuable region comprising at least one organic aerogel and/or organic xerogel.
摘要:
The present invention relates to a dynamically evacuable, electrically operated device comprising a coherently evacuable region and a temperature-controllable useful region, which is thermally insulated from the ambient temperature by the coherently evacuable region, and also a means for actively maintaining a vacuum, such that the pressure in the coherently evacuable region of the device is constantly within a defined pressure range, said coherently evacuable region making up at least 20% by volume of the total volume which is occupied by a porous and/or cellular insulating material in the device, and said coherently evacuable region comprising at least one organic aerogel and/or organic xerogel.
摘要:
The present invention relates to a process for producing polyurethane (PU) rigid foams by reaction of polyisocyanates with compounds having two or more isocyanate-reactive hydrogen atoms in the presence of blowing agents.
摘要:
A heat-insulated wall has two outer covering layers which are disposed at a distance from one another and are constructed at least substantially vacuum-tight. The two outer covering layers are connected to one another in a vacuum-tight manner by a connecting profile that runs along their contour and has a U-shaped cross section. The two outer covering layers together with the connecting profile enclose an intermediate space that can be evacuated and filled with an evacuable heat insulating material. At least one tubular bushing for cables or the like runs through the intermediate space. The bushing connects apertures to one another that are formed the spaced-apart outer covering layers. The tubular bushing is provided on its two end sections with a flange-shaped expanded and flattened region by which the bushing is fixed in a vacuum-tight manner on the mutually facing inner sides of the two outer covering layers.
摘要:
A heat-insulated wall has two outer covering layers which are disposed at a distance from one another and are constructed at least substantially vacuum-tight. The two outer covering layers are connected to one another in a vacuum-tight manner by a connecting profile that runs along their contour and has a U-shaped cross section. The two outer covering layers together with the connecting profile enclose an intermediate space that can be evacuated and filled with an evacuable heat insulating material. At least one tubular bushing for cables or the like runs through the intermediate space. The bushing connects apertures to one another that are formed the spaced-apart outer covering layers. The tubular bushing is provided on its two end sections with a flange-shaped expanded and flattened region by which the bushing is fixed in a vacuum-tight manner on the mutually facing inner sides of the two outer covering layers.
摘要:
The present invention relates to a process for the production of polyurethane rigid foams by reaction of polyisocyanates with compounds with at least two hydrogen atoms reactive with isocyanate groups in the presence of propellants.
摘要:
The invention relates to a process for preparing polyether alcohols by reacting a) aromatic amines with b) alkylene oxides in the presence of c) a catalyst, wherein the alkylene oxide b) comprises at least 90% by weight, based on the weight of the component b), of propylene oxide and an amine is used as catalyst c).
摘要:
The present invention relates to a polyurethane binder for production of elastic layer materials comprising plastics granules, where the polyurethane binder comprises hyperbranched polymer, and to a process for production of these polyurethane binders. The present invention further relates to elastic layer materials obtainable via mixing of this polyurethane binder and plastics granules, and also, if appropriate, other auxiliaries and additives, and hardening of the mixture, to a process for production of these layer materials, and to the use of the inventive layer materials as floorcoverings for sports surfaces, e.g. playing areas, athletics tracks, and sports halls, and for children's play areas, and for walkways.
摘要:
The invention relates to “low-density” polyurethane foams, preferably “low-density” flexible integral polyurethane foams, i.e. polyurethane foams with density of from 120 grams per liter (herein after termed g/L) to less than 300 g/L, obtainable via reaction of polyisocyanates (a) with a polyol component (b) comprising the following constituents: polyesterol (b-1) and polymer polyesterol (b-2), where the proportion of polymer polyesterols (b-2) is from more than 5 to less than 50% by weight, based on the total weight of component (b), and, if appropriate, chain extenders (c), in the presence of water (d) as blowing agent, and also to their use in shoe soles.