Basf Se Corporation

Norbert Gutfrucht

Johann-Peter Melder

Martin Ernst

Heinz Herbst

Gerd Haderlein

Alexander Panchenko

Christof Wilhelm Wigbers

Bernd Stein

Matthias Maase

Veit Stegmann

Regina Benfer

Klaus Breuer

Rainer Xalter

Christoph Mueller

Christian Gruenanger

Andreas Weickgenannt

Jan-Oliver Weidert

Ralph Busch

Hartmut Denecke

Alexander Tishkov

Harald Meissner

Sandra Kramp

Artur Kozicki

Irene Gorman

Christoph Müller

Marc Hofmann

The present invention relates to the polyamines N,N'-diaminopropyl-2-methyl-cyclohexane-1,3-diamine and N,N&#x2032;-diaminopropyl-4-methyl-cyclohexane-1,3-diamine and mixtures thereof, to the use thereof as curing agents for epoxy resin and to a curable composition comprising epoxy resin and these polyamines. Even at low temperatures this curing agent/the corresponding curable composition cures rapidly and is early-stage water resistant and is thus especially suitable for floor coatings. The invention further relates to the curing of this composition and the cured epoxy resin obtained by curing of this composition.

N,N'-diaminopropyl-2-methylcyclohexane-1,3-diamine and N,N&#x2032;-diaminopropyl-4-methylcyclohexane-1,3-diamine and the use thereof as curing agents for epoxy resins

A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5&#xb0; C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.

Method for producing cis- and trans-enriched MDACH

The present invention relates to a process for preparing unsymmetric secondary tert-butylamines by continuous amination in the gas phase, wherein tert-butylamine is converted over hydrogenation catalysts in the presence of an alcohol or aldehyde and hydrogen.

Process for preparing unsymmetric secondary tert-butylamines in the gas phase

The present application relates to a process for preparing unsymmetric secondary tert-butylamines which, as well as the tert-butyl radical, also comprise an alkyl, cycloalkyl or benzyl radical. They are prepared by reacting corresponding aldehydes with tert-butylamine and hydrogen in the presence of hydrogenation catalysts (reductive amination) in the liquid phase.

Process for preparing unsymmetric secondary tert-butylamines in the liquid phase

Growing community of inventors

Lambrecht, Germany

Norbert Gutfrucht