Monoformylated 3,3'-diaminodipropylamines, a process for their production and their use
CA 1309728 C · Owner: Scholl, Hans-Joachim · Inventors: Scholl, Hans-Joachim; Reiff, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo3159, LeA 25,976, MONOFORMYLATED 3,3'-DIAMINODIPROPYLAMINES A PROCESS FOR, THEIR PRODUCTION AND THEIR USE ABSTRACT OF THE INVENTION, The present invention is directed to monofonmylated 3,3'-diaminodipropylamine mixtures corresponding to formulae I and II, (I), (II), The present invention is also directed to a process for the production of these mixtures by reacting acrylonitrile and formamide in the presence of a 4-aminopyridine derivative to form N,-N-bis-(2-cyanoethyl)formamide which is then hydrogenated to the monoformylated 3,3'-diaminopropylamine mixture corresponding to formulae I and II. Finally, the present invention is also directed to the use of these mixtures as chain extending …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 2009.
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