Evonik Degussa Gmbh

Evonik Operations Gmbh

Guido Streukens

Stephan Kohlstruk

Anne Rittsteiger

Christian Lettmann

Matthias Orschel

Sven Schneider

Monika Berweiler

Gerda Grund

Axel Hengstermann

Alexander Martin Rüfer

Sabrina Sowka

Emmanouil Spyrou

Armin Matthias Rix

Martina Ortelt

Robert Jansen

Jörg-Joachim Nitz

Joerg-Joachim Nitz

Tobias Unkelhäußer

Markus Schwarz

Cord Knoop

Martin Maier

Stefan Röder

Anja Müller

Matthias Mendorf

Norbert Schlüter

Norbert Schlueter

Juergen Lippe

Markus Galle

Rolf Hirsch

Norbert Richter

Stephanie Hösl

Dennis Menne

Jorn Walscharts

Alexander Martin Ruefer

Stefan Roeder

Michael D Hinton

Tobias UNKELHÄUSSER

The present invention relates to a composition at least comprising A) an adduct of isocyanatosilanes with hydroxy-functional compounds and B) a tin-free catalyst, and also to a coating composition comprising at least the composition and to the use of the coating composition.

Tin-free catalysis of silane-functional polyurethane crosslinkers

A process for fine purification of isophoronediamine (IPDA), including producing IPDA by aminating hydrogenation of isophorone nitrile in the presence of at least ammonia, hydrogen, a a hydrogenation catalyst and optionally further additions to obtain a crude IPDA, and subjecting the crude IPDA to a fine purification via two vacuum distillation columns, wherein in the first vacuum distillation column the removal of any remaining relatively low-boiling byproducts is effected and in the second vacuum distillation column the IPDA is obtained in pure form as tops and thus separated from the organic residues, and wherein the first vacuum distillation column has vacuum distillation column has a partial condenser fitted to it.

Coupling of distillative purification with a partial condenser for pre-purification of isophoronediamine

Process for preparing isophoronediamine, characterized in that

Process for preparing 3 aminomethyl-3,5,5-trimethylcyclohexylamine

Isophoronediamine, is prepared by A) subjecting isophoronenitrile directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and an optional additive, and in the presence or absence of an organic solvent; or B) first converting isophoronenitrile fully or partly in at least two or more than two stages to isophoronenitrile imine, and subjecting the isophoronenitrile imine to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with another component and/or isophoronenitrile, in the presence of at least ammonia, hydrogen and a catalyst.

Process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine

The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or, in abbreviated form, IPDA, by: I. preparation of isophorone by catalyzed aldol condensations with acetone as reactant; II. reaction of isophorone with HCN to form isophoronenitrile (IPN, 3-cyano-3,5,5-trimethylcyclohexanone); III. catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminative hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, hereinafter called isophoronenitrile or, in abbreviated form, IPN, to give the isophoronediamine.

Method for preparing diamino-dianhydro-dideoxyhexitols, particularly 2,5-diamino-1,4:3,6-dianhydro-2,5-dideoxy-D-hexitol. The invention related to a method for preparing diamino-dianhydro-dideoxyhexitols, particularly preferably 2,5-diamino-1,4:3,6-dianhydro-2,5-dideoxy-D-hexitol.

Method for preparing diamino-dianhydro-dideoxyhexitols, particularly preferably 2,5-diamino-1,4:3,6-dianhydro-2,5-dideoxy-D-hexitol

The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or IPDA for short, by means of catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminating hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, also called isophoronenitrile or IPN for short hereinafter.

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Wuppertal, Germany

Guido Streukens