Title: Process for the preparation of polyaryl amines having methylene bridges

Abstract: A process has been invented for the preparation of polyaryl polyamines having methylene bridges by condensation of primary arylamines with formaldehyde in the presence of a catalyst. According to the invention, the amount of binuclear compounds and an improved viscosity can be obtained if one adds the remaining amount of primary arylamine immediately after the formaldehyde.

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Inventors: Biller, Efim (Zurich, CH)

Application Number: 06/140914
Filing Date: 1980-04-16
Publication_date: 1983-07-12
Assignee: ELPROCHINE AG (CH)

Primary Class(es): 564/331 562/605, 564/333, 562/114
Other Classes: C07C85/08
US Patent Ref:

3297759	January, 1967	Curtis et al.	260/570	Continuous process for producing mixtures of methylene-bridged polyphenyl polyamines
3367969	February, 1968	Perkins	260/570	Process for the preparation of 4, 4'-methylenedianiline
3857890	December, 1974	Recchia	260/570	PROCESS FOR PREPARING METHYLENE-DI-ANILINES
3996283	December, 1976	Korofel	260/570	Process for the production of polyamines

Other Refs:
Primary Examiner: Hines, Robert V.
Assistant Examiner:
Attorney: Sprung, Horn, Kramer & Woods

Parent Case Data:

This is a continuation of application Ser. No. 002,812 filed Jan. 11, 1979 now abandoned, w