Abstract: The disclosure provides a composite element having a layer structure with 2 mm to 20 mm of metal, 10 mm to 100 mm of compact polyurethane formulation and another 2 mm to 20 mm of metal, a method of using thereof and corresponding production process therefor. The polyurethane formulation is obtainable by reacting (a) a compound having at least two isocyanate groups with (b) polyether polyol and the polyether polyol (b) is a mixture including at least the constituents of polyether polyol (b1) and polyether polyol (b2).

Abstract: Described herein is a process for producing insulated pipes including providing a media pipe and a film hose continuously formed from a film or a media pipe and a jacketing pipe, wherein the media pipe is arranged inside the film hose or the jacketing pipe and a slot is formed between the media pipe and the film hose or jacketing pipe, wherein an adhesion promoter is applied to the surface of the media pipe facing the film hose or the jacketing pipe, introducing a polyurethane system at least including an isocyanate component (a) including at least one isocyanate, a polyol component (b), and at least one catalyst into the slot before the adhesion promoter is fully cured, and foaming and curing the polyurethane system. Also described herein are insulated pipes obtainable or obtained by such a process.

Abstract: Described herein is a process for producing a pipe insulated with polyurethane foam, where (a) isocyanates are mixed with (b) polyols, (c) blowing agent including at least one aliphatic, halogenated hydrocarbon compound (c1), made up of from 2 to 5 carbon atoms, at least one hydrogen atom and at least one fluorine and/or chlorine atom, where the compound (c1) includes at least one carbon-carbon double bond, (d) catalyst including N,N-dialkylbenzylamine, optionally (e) chain extenders and/or crosslinkers and optionally (f) auxiliaries and additives to give a reaction mixture, the reaction mixture is applied to a pipe for media and is allowed to cure to give the polyurethane foam. Also described herein is an insulated pipe obtained by such a process and a method of using such an insulated pipe as insulated composite wall pipe for district heating or district cooling networks laid in the ground.

Abstract: Described herein are processes for producing cold-flexible polyurethane insulation, in which (a) polyisocyanates are mixed with (b) compounds having groups which are reactive to isocyanates, (c) blowing agents, (d) catalysts, (e) plasticizers and optionally (f) further additives to give a reaction mixture and the mixture is applied to a surface and cured to form insulation. Also described herein is a polyurethane insulation obtainable by a process described herein.

Abstract: Described herein is a process for producing insulated pipes including providing a media pipe and a film hose continuously formed from a film or a media pipe and a jacketing pipe, wherein the media pipe is arranged inside the film hose or the jacketing pipe and a slot is formed between the media pipe and the film hose or jacketing pipe, wherein an adhesion promoter is applied to the surface of the media pipe facing the film hose or the jacketing pipe, introducing a polyurethane system at least including an isocyanate component (a) including at least one isocyanate, a polyol component (b), and at least one catalyst into the slot before the adhesion promoter is fully cured, and foaming and curing the polyurethane system. Also described herein are insulated pipes obtainable or obtained by such a process.

Abstract: The disclosure provides a composite element having a layer structure with 2 mm to 20 mm of metal, 10 mm to 100 mm of compact polyurethane formulation and another 2 mm to 20 mm of metal, a method of using thereof and corresponding production process therefor. The polyurethane formulation is obtainable by reacting (a) a compound having at least two isocyanate groups with (b) polyether polyol and the polyether polyol (b) is a mixture including at least the constituents of polyether polyol (b1) and polyether polyol (b2).

Abstract: Described herein are processes for producing cold-flexible polyurethane insulation, in which (a) polyisocyanates are mixed with (b) compounds having groups which are reactive to isocyanates, (c) blowing agents, (d) catalysts, (e) plasticizers and optionally (f) further additives to give a reaction mixture and the mixture is applied to a surface and cured to form insulation. Also described herein is a polyurethane insulation obtainable by a process described herein.

Abstract: The present invention relates to a continuous process for producing a profile comprising at least one core made of a polyurethane foam or a mixture comprising a polyurethane foam, at least one jacket made of at least one thermoplastic material, and optionally at least one foil between core and jacket, to a profile produced via said process, to the use of this profile for producing windowframes, doorframes, or in the fitting-out of interiors, or in apparatuses in which, during operation, temperature differences arise between interior space and exterior space, and also to an apparatus for carrying out the process of the invention.

Abstract: The invention relates to the envelopment of a connection of at least two pipes or parts thereof by an open-celled rigid foam, the production of such an envelope and also the use of open-celled rigid foam for protecting connections of two pipes.

Abstract: The present invention relates to a rigid polyurethane foam in which rigid polyurethane foam constituents are embedded in a polyurethane matrix, articles which are enveloped by such a foam for insulation and corresponding production processes.

Abstract: The present invention relates to a continuous process for producing an insulated pipe comprising at least one medium pipe, an outer pipe, a layer of at least one polyurethane between the at least one medium pipe and outer pipe and a film tube between the at least one polyurethane and the outer pipe, which comprises at least the steps (A) provision, in a jaw band, of at least one medium pipe and a film tube formed continuously from a film, where the at least one medium pipe is arranged within the film tube in such a way that a gap is formed between the at least one medium pipe and the film tube, (B) introduction of a polyurethane system comprising at least one isocyanate component (a) and at least one polyol (b) into the gap, (C) foaming and allowing to cure of the polyurethane system and (D) application of a layer of at least one material to the film tube in order to form the outer pipe, where the polyurethane system has thixotropic properties.

Abstract: The present invention relates to a composition for producing a rigid polyurethane foam comprising at least one polyol having a molecular weight of not less than 1700 g/mol and at least one blowing agent as component A, and at least one polyisocyanate as component B, wherein the at least one polyisocyanate B comprises from 11 to 39.5 wt % of a polyisocyanate prepolymer, based on a polyether polyol having an OH number of at least 100 mg KOH/g, to a rigid polyurethane foam obtainable by reacting this composition, to a process for producing such a rigid polyurethane foam, to the use of such a rigid polyurethane foam for insulation, especially for pipe insulation and also to a process for producing an insulated pipe.

Abstract: The present invention relates to a process for producing insulated pipes, the use of a polyurethane system comprising an isocyanate component (a), a polyol mixture (b) and at least one catalyst for producing insulated pipes, wherein the cream time for the polyurethane system is less than the time for introduction of the polyurethane system into the pipe, the use of specific amines as catalyst in a polyurethane system for producing insulated pipes and also an insulated pipe which can be obtained by the process of the invention.

Abstract: The present invention relates to a continuous process for producing a profile comprising at least one core made of a polyurethane foam or a mixture comprising a polyurethane foam, at least one jacket made of at least one thermoplastic material, and optionally at least one foil between core and jacket, to a profile produced via said process, to the use of this profile for producing windowframes, doorframes, or in the fitting-out of interiors, or in apparatuses in which, during operation, temperature differences arise between interior space and exterior space, and also to an apparatus for carrying out the process of the invention.

Abstract: The present invention relates to a polyurethane foam which 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 having from 1 to 20 carbon atoms, amine-comprising compounds and mixtures thereof as component (E) and at least one blowing agent as component (F), wherein the ratio of OCN groups to OH groups (ISO index) is from 140 to 180. The present invention further relates to a process for producing said polyurethane foam, its use for insulation, in particular for the insulation of pipes, and also pipe insulation comprising a polyurethane foam according to the invention.

Abstract: The present invention relates to a rigid polyurethane foam in which rigid polyurethane foam constituents are embedded in a polyurethane matrix, articles which are enveloped by such a foam for insulation and corresponding production processes.

Abstract: A process for the batchwise production of insulated pipes, comprising the steps: 1) provision of medium pipe and casing, the medium pipe being arranged inside the casing, 2) production of a polyisocyanurate foam by reacting an isocyanate component (a) with a polyol mixture (b) between medium pipe and casing, wherein the polyol mixture (b) comprises no polyester alcohols and has a viscosity of less than 1300 mPa·s, measured according to DIN 53019 at 20° C.

Abstract: The present invention relates to a radiator body comprising at least one radiant panel having at least one structure suitable for receiving at least one tube, at least one tube located in the structure in order to transport a heating or cooling medium, at least two side parts and at least one layer insulating the radiator body, wherein the ratio of the average cross-sectional area of the at least one radiant panel to the cross-sectional area of the at least two side parts is at least 3 and/or the at least two side parts are each decoupled thermally from the at least one radiant panel, as well as 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 the envelopment of a connection of at least two pipes or parts thereof by an open-celled rigid foam, the production of such an envelope and also the use of open-celled rigid foam for protecting connections of two pipes.

Abstract: A process for the batchwise production of insulated pipes, comprising the steps: 1) provision of medium pipe and casing, the medium pipe being arranged inside the casing, 2) production of a polyisocyanurate foam by reacting an isocyanate component (a) with a polyol mixture (b) between medium pipe and casing, wherein the polyol mixture (b) comprises no polyester alcohols and has a viscosity of less than 1300 mPa·s, measured according to DIN 53019 at 20° C.