Abstract:
The invention relates to a polyurethane foam that can be obtained by reacting at least one polyether polyol as component (A), at least one polyether polyol based on at least one amine as component (B), at least one polyester polyol as component (C), and at least one polyisocyanate as component (D), in the presence of at least one catalyst selected from the group consisting of salts of carboxylic acids with 1 to 20 C atoms, compounds containing amines, and mixtures thereof, as component (E), and at least one blowing agent as component (F), with the ratio of OCN groups to OH groups (ISO index) being between 140 and 180. In addition, the present invention relates to a method for producing this polyurethane foam, to the use of same for insulation, particularly for pipe insulation, and to a pipe insulator containing a polyurethane foam according to the invention.
Abstract:
The invention relates to a method for producing insulated pipes, to the use of a polyurethane system comprising an isocyanate component (a), a polyol mixture (b), and at least one catalyst to produce insulated pipes, wherein the starting time for the polyurethane system is less than the time for filling the pipe with the polyurethane system, to the use of special amines as catalysts in a polyurethane system for producing insulated pipes, and to an insulated pipe that can be obtained by the method according to the invention.
Abstract:
The invention relates to a rigid polyurethane foam, in which rigid polyurethane foam constituents are embedded in a polyurethane matrix. The invention also relates to objects that are encased in a foam of this type for insulation purposes and to corresponding production methods.
Abstract:
The present invention relates to a composition for producing a polyurethane hard foam material, containing at least one polyol having a molecular weight of at least 1700 g/mol and at least one propellant as component A and at least one polyisocyanate as component B, wherein the at least one polyisocyanate B 11 contains up to 39.5 % by weight of a polyisocyanate prepolymer, based on a polyether polyol comprising a OH number of at least 100 mg KOH/g, to a polyurethane hard foam material, obtainable by conversion of said composition, to a method for producing such a polyurethane hard foam material, to the use of such a polyurethane hard foam material for insulation, in particular for pipe insulation, and to a method for producing an insulated pipe.
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:
The invention relates to a method for producing insulated pipes, comprising the providing of a medium pipe and a film hose, continuously formed from a film, or a medium pipe and a jacket pipe, wherein the medium pipe is arranged within the film hose or the jacket pipe and a gap is formed between the medium pipe and film hose or jacket pipe, wherein a bonding agent is applied to the surface of the medium pipe facing the film hose or jacket pipe, the filling of a polyurethane system, at least comprising an isocyanate component (a) containing at least one isocyanate, a polyol component (b) and at least one catalyst into the gap before the bonding agent is completely cured, and allowing the polyurethane system to foam and cure. The invention further relates to insulated pipes, obtainable or obtained according by the method according to the invention.
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.