Abstract: A compound of the structural formula 1 Also disclosed is a process for producing 2-(3-(aminomethyl)-3,5,5-trimethylcyclohexyl)propane-1,3-diamine by A) reacting isophorone nitrile and malononitrile to afford the intermediate 2-(3-cyano-3,5,5-trimethylcyclohexylidene) malononitrile, and B) hydrogenating 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar.

Abstract: A compound of the structural formula 1 as a hardener in epoxy resin composition.

Abstract: The present invention relates to 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine, which can be used as hardener in epoxide applications.

Abstract: A compound of the structural formula 1 A process for producing 2-(3-(aminomethyl)-3,5,5-trimethylcyclohexyl)propane-1,3-diamine by A) reacting isophorone nitrile and malononitrile to afford the intermediate 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile, and B) hydrogenating 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar.

Abstract: The present invention relates to a process for producing 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine, which can be used as hardener in epoxide applications.

Abstract: A process for producing 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine by A) reacting triacetonamine (TAA) and malononitrile to afford the intermediate 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile, and B) hydrogenating 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar. In another embodiment, the hydrogenation in step B) of the process is performed in two stages at 20-120° C. and at 20-300 bar.

Abstract: A diamine 2-(3,3,5-trimethylcyclohexyl)propane-1,3-diamine of formula 1 and a process for producing 2-(3,3,5-trimethylcyclohexyl)propane-1,3-diamine by A) reacting isophorone (IP) and malononitrile to afford the intermediate 2-(3,5,5-trimethylcyclohex-2-en-1-ylidene)malononitrile, and B) hydrogenating 2-(3,5,5-trimethylcyclohex-2-en-1-ylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar.

Abstract: A process for producing 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine by A) reacting triacetonamine (TAA) and malononitrile to afford the intermediate 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile, and B) hydrogenating 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar. In another embodiment, the hydrogenation in step B) of the process is performed in two stages at 20-120° C. and at 20-300 bar.

Abstract: A diamine 2-(3,3,5-trimethylcyclohexyl)propane-1,3-diamine of formula 1 and a process for producing 2-(3,3,5-trimethylcyclohexyl)propane-1,3-diamine by A) reacting isophorone (IP) and malononitrile to afford the intermediate 2-(3,5,5-trimethylcyclohex-2-en-1-ylidene)malononitrile, and B) hydrogenating 2-(3,5,5-trimethylcyclohex-2-en-1-ylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar.

Abstract: A compound of the structural formula 1 Also disclosed is a process for producing 2-(3-(aminomethyl)-3,5,5-trimethylcyclohexyl)propane-1,3-diamine by A) reacting isophorone nitrile and malononitrile to afford the intermediate 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile, and B) hydrogenating 2-(3-cyano-3,5,5-trimethylcyclohexylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar.

Abstract: A process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) is provided wherein distillation vapors from the work-up of product fractions are recycled to earlier stages of operation of the process.

Abstract: A process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) is provided wherein distillation vapors from the work-up of product fractions are recycled to earlier stages of operation of the process.