Abstract:
The invention relates to a foamed polyurethane which is obtainable by mixing a) polyisocyanates, b) high-molecular compounds carrying groups that are reactive to isocyanate groups, c) solid particles, d) propellants, e) optionally chain extenders, cross-linking agents or mixtures thereof, f) optionally a catalyst and g) optionally other additives, to give a reaction mixture and allowing said mixture to react, the percentage of chain extenders being less than 6% by weight, based on the overall weight of components a) to f), the solid particle content being more than 15% by weight, based on the overall weight of components a) to f), and the average functionality of the high-molecular compounds carrying groups that are reactive to isocyanate groups being less than 2.5. The invention further relates to a molded body which contains a foamed polyurethane of the invention, to a method for producing the foamed polyurethane and to the use of a molded body according to the invention as a shoe sole.
Abstract:
The invention relates to a radiant body, comprising at least one radiant panel having at least one structure suitable for receiving at least one pipe, at least one pipe located in said structure for transporting a heating or cooling medium, at least two lateral parts and at least one layer insulating the radiant body. The ratio of the mean cross-sectional area of the at least one radiant panel to the cross-sectional area of the at least two lateral parts amounts to at least 3 and/or the at least two lateral parts are each thermally decoupled from the at least one radiant panel. The invention also relates to a method for producing the radiant panel according to the invention and to the use of such a radiant panel for heating or cooling.
Abstract:
Procedimiento para la fabricación de cubiertas exteriores para carreteras, vías y otras áreas de circulación en el cual se prepara una mezcla que contiene material mineral y una mezcla de reacción de poliuretano, así como opcionalmente otros aditivos, se aplica sobre un material de sustrato, se compacta con una presión de contacto de al menos 5 N/cm² y se endurece, en cuyo caso esencialmente se opera sin emplear disolventes; el material de sustrato es una capa de soporte o de aglutinante o una mezcla que contiene la mezcla de reacción de poliuretano y material mineral y la mezcla de reacción de poliuretano puede obtenerse mezclando a) isocianatos con b) compuestos que tienen al menos dos átomos de hidrógeno reactivos frente a isocianato, los cuales contienen un compuesto hidroxifuncional con grupos hidrófugos, así como opcionalmente c) agentes extensores de cadena y/o agentes de reticulación, d) catalizadores y e) otros aditivos.
Abstract:
The invention relates to a method for producing a cold flexible polyurethane insulation in which (a) polyisocyanates are mixed with (b) compounds with groups which are reactive towards isocyanates, (c) propellants, (d) catalysts, (e) plasticizers and optionally (f) other additives in order to form a reaction mixture, which is applied onto a surface and is cured in order to form an insulation. The compounds with groups (b) which are reactive towards isocyanates contain at least one polyetherol (b1) with a nominal functionality of 4 or more, a content of propylene oxide, based on the total weight of alkylene oxide in the polyetherol (b1), of more than 60 wt.%, and an OH number of at least 300 mg KOH/g, at least one polyetherol (b2) with a nominal functionality of 3.5 or less, a content of prim. OH groups of more than 50%, and an OH number of less than 300 mg KOH/g, at least one polyesterol (b3), and chain extenders and/or crosslinking agents (b4). The invention additionally relates to a polyurethane insulation which can be obtained using a method according to the invention.
Abstract:
The invention relates to a method for the adsorption and/or absorption of oil, according to which a polyurethane sponge with excellent mechanical properties is brought into contact with oil.
Abstract:
Disclosed is a process for the production of top layers for roads, tracks, and other areas used by traffic, by producing a mixture comprising mineral material and a polyurethane reaction mixture, and also, if appropriate, further additions, applying it to a substrate material, and compacting and hardening it by applying a pressure of at least 5 N/cm2, where operations are substantially carried out without use of solvents and the polyurethane reaction mixture is obtained by mixing of: a) isocyanates with b) compounds having at least two hydrogen atoms reactive toward isocyanate, which comprise a hydroxy-functional compound having hydrophobic groups, and also, if appropriate, c) chain extenders and/or crosslinking agents, d) catalysts, and e) other additives.