Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Power2polymers Gmbh

Jens Langanke

Aurel Wolf

Jörg Hofmann

Christoph Gürtler

Hartmut Nefzger

Ilja Peckermann

Kai Laemmerhold

Bert Klesczewski

Gernot Jaeger

Stefan Wershofen

Walter Leitner

Thomas Ernst Müller

Volker Michele

Hans-Georg Pirkl

Ulrich Liman

Christoph Guertler

Jan Heijl

Matthias Wohak

Thomas Ernst Mueller

Torsten Heinemann

Urs Rauwald

Stefanie Braun

Erik Sluyts

Gernot Jäger

Franz Beggel

Wolf Kloeckner

Niklas Meine

Monika Heinz

Jochen Norwig

Natalie Bittner

Matthias Leven

Volker Marker

Philipp Nicholas Wagner

Florian Kessler

Andreas Ernst

Daniela Cozzula

Thomas Voessing

Philipp Nicolas Wagner

Thomas VÖSSING

Gernot JÄGER

Thomas Ernst MÜLLER

Roman Vasiuta

Norah Heinz

Tofighi Ghazal

Christine Hussong

Marius Maronna

Martin Machat

The invention relates to a method for producing aniline or an aniline derivative, in which a solution of aminobenzoic acid in aniline with a mass fraction of aniline in the solution, in relation to the total mass of aminobenzoic acid and aniline, in the region of 20% to 85%, is subject to a thermal decarboxylation at a temperature in the region of 165&#xb0; C. to 500&#xb0; C. without the presence of a non-system catalyst, such that the aminobenzoic acid is converted into aniline. The obtained aniline can be converted into derivatives, such as di- and polyamines of the diphenylmethane series.

Method for producing aniline or an aniline derivative

The invention relates to a process for preparing a specific hydroxy compound by means of decarboxylation of a specific carboxylic acid compound or a salt of said carboxylic acid compound, to a method for preparing a diaryl carbonate, a bisphenol or a polycarbonate, a diaryl carbonate or bisphenol, a polycarbonate, and to a method for adjusting the isotope ratio of C14 to C12 in a polymer. A specific solvent is used during decarboxylation.

Process for preparing a hydroxy compound by means of decarboxylation

The present invention describes a process for producing an elastomer, preferably a polyurethane-containing elastomer, by reacting a polyol component (A) comprising at least one polyether carbonate polyol (A-1) containing carbon-carbon double bonds with a component (B) which is reactive with OH groups and contains at least one compound reactive toward OH groups, preferably an isocyanate component (B-1) containing NCO groups, in the presence of a free-radical initiator (C), preferably at least one peroxide (C-1), and optionally a catalyst (D), where the molar ratio of the OH-reactive groups of component (B) reactive with groups, to the OH groups of the polyol component (A) containing carbon-carbon double bonds, is greater than 1.0. It further relates to elastomers obtainable by such a process, preferably polyurethane elastomers, the use thereof, and two-component systems for production of elastomers, preferably polyurethane elastomers.

Process for producing elastomers

The invention relates to a method for producing an isocyanate, wherein a carbamate or thiolcarbomate is converted, in the presence of a catalyst, with separation of an alcohol or thioalcohol, at a temperature of at least 150&#xb0; C., to the corresponding isocyanate, wherein a compound of the general formula (X)(Y)(Z&#x2014;H) is used as a catalyst, in particular characterized in that the compound has both a proton donor function and a proton acceptor function. In the catalysts according to the invention, a separable proton is bound to a heteroatom, which is more electronegative than carbon. Said heteroatom is either identical to Z or a component thereof. In the catalysts according to the invention, there is additionally a proton acceptor function which is either identical to X or a component thereof. According to the invention, the proton donator and proton acceptor function are connected to each other by the bridge Y.

Method for producing isocyanates

The invention relates to a process for producing polyoxymethylene block copolymers, comprising the step of activating the DMC catalyst in the presence of an OH-terminated polymeric formaldehyde starter compound by means of a defined amount of alkylene oxide, optionally followed by polymerization with alkylene oxides, if necessary in the presence of other comonomers. The invention further relates to polyoxymethylene block copolymers that can be obtained by means of such a process and to the use of these for producing polyurethane polymers.

Process for the production of polyoxymethylene block copolymers

The present invention relates to a method for producing polyether carbonate polyols by attaching alkyloxides and carbon dioxide to H-functional starter compounds, characterized in that at least one alcohol containing at least two urethane groups is used as the H-functional starter compound. The invention further relates to polyether carbonate polyols containing a structural unit of the formula (IV), wherein: Rdenotes a linear or branched Cto C-alkylene, which optionally can be interrupted by heteroatoms of O, S or N and can be substituted, preferably by CH&#x2014;CHor CH&#x2014;CH(CH); Rdenotes a linear or branched Cto C-alkylene, Cto C-cycloalkylene, Cto C-alkylene, Cto C-aralkylene, Cto C-alkenylene, Cto C-alkynylene, each of which can optionally be interrupted by heteroatoms such as O, S or N and/or can be substituted with alkyl, aryl and/or hydroxyl groups, preferably Cto C-alkyls; Rdenotes H, linear or branched Cto C-alkyl, Cto C-cycloalkyl, Cto C-aryl, Cto C-aralkyl, Cto C-alkenyl, Cto C-alkynyl, each of which can optionally be interrupted by heteroatoms such as O, S or N and/or can each be substituted with alkyl, aryl and/or hydroxyl groups, preferably H; Rdenotes H, a linear of branched Cto C-alkyl, Cto C-cycloalkyl, Cto C-aryl, Cto C-aralkyl, Cto C24-alkenyl, C2 to C-alkynyl, each of which can optionally be interrupted by heteroatoms such as O, S or N and/or can each be substituted with alkyl, aryl and/or hydroxyl groups, preferably H; Rdenotes a linear or branched Cto C-alkylene, which can optionally be interrupted by heteroatoms such as O, S or N and can be substituted, preferably by CH&#x2014;CHor CH&#x2014;CH(CH); and wherein R1 to R5 can be identical or different to each other.

Use of alcohols which contain at least two urethane groups for producing polyether carbonate polyols

The invention relates to a process for producing polyether carbonate polyols through an addition reaction of alkylene oxides and carbon dioxide onto one or more H-functional starter substances in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, characterized in that one or more H-functional starter substances containing at least 1000 ppm of component (K) is/are continuously metered into the reactor during the reaction, where component (K) is selected from at least one compound containing a phosphorus-oxygen bond and a phosphorus compound that can form one or more P&#x2014;O bonds through reaction with OH-functional compounds.

Method for producing polyether carbonate polyols

The present invention relates to a method for producing formaldehyde-alkylene carbonate copolymers comprising the step of reacting trimeric, oligomeric and/or polymeric formaldehyde with an alkylene carbonate in the presence of a catalyst. Said invention further relates to copolymers obtainable by this method and the reaction products thereof with polyisocyanates.

Method for producing formaldehyde-alkyl carbonate-copolymers

The present invention relates to a method for preparing polyether carbonate polyols by the addition of alkylene oxides and carbon dioxide onto H-functional starter compounds. The method is characterized in that at least one urethane alcohol according to formula (II) is used as an H-functional starter compound, wherein R 1 represents a linear or branched C2 to C24-alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R2 represents a linear or branched C2 to C24-alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R3 represents H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-arylalkyl, C2 to C24-alkenyl, C2 to 24-alkinyl, that can each be optionally interrupted by heteroatoms such as O, S, or N and/or may each be substituted with alkyl, aryl, and/or hydroxyl.

Use of urethane alcohols for preparing polyether carbonate polyols

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Mechernich, Germany

Jens Langanke