Bayer Materialscience Ag

Bayer Aktiengesellschaft

Covestro Deutschland Ag

Basf Se Corporation

Covestro Intellectual Property Gmbh & Co. Kg

Torsten Hagen

Stefan Wershofen

Daniel Koch

Hans-Georg Pirkl

Richard Adamson

Rudolf Uchdorf

Manfred Schmidt

Hartmut Nefzger

Johann Rechner

Klaus Lorenz

Thomas König

Ulrich Liesenfelder

Johan Vanden Eynde

Meike Niesten

Rolf William Albach

Fritz Pohl

Hans-Detlef Arntz

Florian Hupka

Stephan Konrad

Marc Buts

Christian Steffens

Heinrich Hähnsen

Torsten Heinemann

Stefan Grabowski

Jeffrey Bolton

Roland Helmut Krämer

Frank Bruynseels

Peter Nordmann

Ursula Tracht

Rolf Roers

Ernst Felske

Nicole Welsch

Sindhu Menon

Niklas Meine

Wolfgang Friedrichs

Michael Baecker

Friedhelm K&auml;mper

Heinz-Herbert M&uuml;ller

Stephan Laue

Michael Schedler

Frank Guldentops

Frank Doebert

Andreas Stremmel

Christoph Biedron

Frank Quaeyhaegens

Johan Decloedt

Paul Van Dorst

Uwe Arndt

Rene Abels

Inge Tinnefeld

Josip Gaca

Jürgen Boos

Walter Schindler

Rolf Albach

Gernot JÄGER

Karl-Heinz KÖHLER

Roland KRÄMER

The invention relates to flame-proofed polyurethane hard foam material or polyurethane/polyisocyanurate hard foam material (designated below individually or jointly also as 'PUR/PIR hard foam material') comprising phosphinates (also hypophosphite), and to a method for producing PUR/PIR hard foam materials through the implementation of a reaction mixture containing A1 an isocyanate-reactive component, A2 propellant, A3 catalyst, A4 optionally additive, A5 flame-proofing agent, B an isocyanate component, characterised in that the flame-proofing agent A5 contains a phosphine according to the formula (I)M[(R)PO], where R=in each case stands for H, C1- to C4-(hydroxy-)alkyl group or benzyl group, M=an element of the main groups 1 to 3, wherein hydrogen is excepted, and n=the number of the main group of M, and the proportion of the phosphine according to the formula (I) is 0.1 to 15 wt %, based on the total mass of components A1 to A5.

Phosphinate as flame-proofing additive for PUR/PIR hard foam material

The invention relates to a method for producing PUR/PIR rigid foam materials, having the steps of reacting at least one polyester polyol (a), which can be obtained by reacting a. I.) at least one cyclic carboxylic acid anhydride; a.2.) at least one low-molecular dial with a molecular mass of 62 to 450 Da; and a.3.) at least one alkylene oxide; by esterifying the components a.I.) and a.2.) and subsequently oxalkylating the resulting carboxylic acid half-ester using component a.3.); wherein at least the oxalkylation is carried out using a.4.) at least one amine catalyst in which (the) nitrogen atom(s) is/are part of an aromatic ring system, with (b) at least one polyisocyanate-containing component, (c) at least one propellant, (d) at least one or more catalysts, (e) optionally at one flameproofing agent and/or other auxiliary agents, and (f) optionally at least one additional compound with at least two groups which are reactive towards isocyanates and which differ from polyester polyol (a). The invention also relates to a PUR/PIR rigid foam material which can be obtained using a method according to the invention, to a composite element comprising the PUR/PIR rigid foam material according to the invention, at least one cover layer selected from concrete, wood, press board, aluminum, copper, steel, stainless steel, paper, non-wovens, and plastic, and multilayer composites or a combination thereof. The invention also relates to the use of the PUR/PIR rigid foam materials according to the invention or the composite element according to the invention for heat damping.

PUR/PIR rigid foams made of polyaddition oligoesters

The invention relates to a process for preparing liquid, storage-stable isocyanate mixtures having carbodiimide (CD) and/or uretonimine (UI) groups or prepolymers derived therefrom, wherein (i) in a first step, a starting isocyanate which is an organic isocyanate or a mixture of two or more organic isocyanates is partly carbodiimidized with a catalyst K of the formula cyclo-CHP(O)R, where the substituent R is a saturated or unsaturated, optionally substituted, especially halogen-substituted, organic radical, and then (ii) in a second step, the carbodiimidization reaction is stopped at a temperature of &#x2264;80&#xb0; C. by adding a stopper, the stopper used being an organic silane S of the general formula HSiX, where n is a natural number in the range from 1 to 3, where X is a saturated or unsaturated, optionally substituted, especially halogen-substituted, organic radical.

Process for preparing liquid, storage-stable organic isocyanates having carbodiimide and/or uretonimine groups and having low colour number

The invention relates to foam materials that are resistant to high temperatures, to the production of same from aromatic polyisocyanates and polyepoxides, and to the use of said foam materials.

Foam materials resistant to high temperatures

The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discolored and is free of insoluble constituents.

Process and apparatus for the preparation of polycarbonate

The invention relates to a process for the production of liquid, storage-stable isocyanate mixtures with a low color index having carbodiimide-(CD) and/or uretone imine (UI) groups, the isocyanate mixtures that can be obtained by this process and their use for the production of blends with other isocyanates or for the production of isocyanate group-containing pre-polymers and also of polyurethane plastics, preferably polyurethane foamed plastics.

Process for the production of liquid, storage-stable organic isocyanates with a low colour index having carbodiimide- and/or uretone imine groups

The invention relates to an improved process for the production of isocyanates by the reaction of an amine or a mixture of two or more amines with phosgene, the improvement involving the phosgene containing less than about 100 ppm of sulfur in elemental or bound form. The inventive process yields light-colored isocyanates that are suitable for the production of polyurethanes or their precursors (e.g. prepolymers) without the treatment processes heretofore required.

Process for the production of light-colored isocyanates

The invention provides a process for the preparation of polyamines of the diphenylmethane series. This process comprises

Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation

Di- and polyamines of the diphenylmethane series are prepared by a) mixing a first portion of aniline with an acid catalyst, b) mixing a second portion of aniline with formaldehyde, and c) mixing and reacting the mixtures prepared in each of steps a) and b). The diamines produced by this process may then be phosgenated to produce the corresponding di-/polyisocyanate.

Process for the preparation of di- and polyamines of the diphenylmethane series

The invention relates to a method of producing polyisocyanates of the diphenylmethane series including the steps of

Process for the production of polyisocyanates of the diphenylmethane series by phosgenation of non-neutralized polyamine of the diphenylmethane series

Polyisocyanates of the diphenylmethane series are produced by a) reacting aniline and formaldehyde in the presence of an acidic catalyst to produce a polyamine, b) neutralizing the reaction mixture from step a) with a base at a temperature of more than 110&deg; C. or neutralizing the reaction mixture from step a) with a base and heating the neutralized mixture to a temperature of more than 110&deg; C., and c) phosgenating the polyamine from step b) to convert it to the corresponding polyisocyanate.

Process for the production of polyisocyanates of the diphenylmethane series with a reduced color value

Polyisocyanates of the diphenyl methane series having reduced color values are obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine, b) neutralizing the reaction mixture containing polyamine with a base, c) separating the neutralized mixture into the aqueous and the organic phases, d) adding a base to the organic phase and then e) phosgenating the resulting polyamine to produce the corresponding polyisocyanate.

Process for producing polyisocyanates of the diphenyl methane series having a reduced color value

Growing community of inventors

Essen, Germany

Torsten Hagen