Process for the preparation of mixtures of polyamines of the polyamino-polyaryl-polymethylene type
Номер патента: CA1128068A
Опубликовано: 20-07-1982
Автор(ы): Hartmut Knofel, Kenneth L. Dunlap
Принадлежит: Bayer AG, Mobay Corp
Опубликовано: 20-07-1982
Автор(ы): Hartmut Knofel, Kenneth L. Dunlap
Принадлежит: Bayer AG, Mobay Corp
Реферат: Mo-1895 LeA 19,337 PROCESS FOR THE PREPARATION OF MIXTURES OF POLYAMINES OF THE POLYAMINO-POLYARYL-POLYMETHYLENE TYPE ABSTRACT OF THE DISCLOSURE The instant invention is directed to a process for the preparation of mixtures of polyamines of the poly-amino-polyaryl-polymethylene type whereby the proportion of the ortho-substituted products are substantially in-creased. This increase is brought about by adding the acid catalyst to the aromatic amine/formaldehyde reaction mixture in two or more stages. Mo-1895
Process for the production of di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer
Номер патента: CA2050167C. Автор: Otto Immel,Gerhard Darsow,Hans-Helmut Schwarz,Helmut Waldmann,Rudolf Braden. Владелец: Bayer AG. Дата публикации: 2001-04-17.