Title:
METHOD FOR PRODUCING POLYAMINE OF DIPHENYLMETHANE SERIES HAVING LOW PROTONATION DEGREE
Document Type and Number:
Japanese Patent JP2006022100
Kind Code:
A
Abstract:
To provide a method for simply and economically producing a polyamine of a diphenylmethane series in which an acid catalyst can be utilized in a degree of protonation of <15% without separating a reaction mixture into a two phase system.
The method for producing the polyamine comprises (a) reacting aniline with formaldehyde at a molar ratio of 1.5:1 to 6:1 at 20-100°C, preferably at 30-95°C, especially preferably at 40-90°C while keeping water content of an acidic reaction mixture to <20 mass% and setting degree of protonation of <15% and (b) increasing the temperature of the reaction mixture to 110-250°C when the ratio of mass contents of p-aminobenzylaniline and 4,4'-MDA in the acidic reaction mixture is lowered to <1.00.
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Inventors:
HAGEN TORSTEN
KOCH DANIEL
PIRKL HANS-GEORG
POHL FRITZ
WERSHOFEN STEFAN
UCHDORF RUDOLF
ADAMSON RICHARD
KOCH DANIEL
PIRKL HANS-GEORG
POHL FRITZ
WERSHOFEN STEFAN
UCHDORF RUDOLF
ADAMSON RICHARD
Application Number:
JP2005196739A
Publication Date:
January 26, 2006
Filing Date:
July 05, 2005
Export Citation:
Assignee:
BAYER MATERIALSCIENCE AG
International Classes:
C07C209/78; C07C209/54; C07C211/50; C07C263/10; C07C265/14; C08G18/76; C07B61/00
Domestic Patent References:
| JPS60202844A | 1985-10-14 | |||
| JPH0641025A | 1994-02-15 | |||
| JPH08291114A | 1996-11-05 | |||
| JP2003313155A | 2003-11-06 | |||
| JP2004059920A | 2004-02-26 | |||
| JPS60202844A | 1985-10-14 | |||
| JPH0641025A | 1994-02-15 | |||
| JPH08291114A | 1996-11-05 |
Foreign References:
| US3517062A | 1970-06-23 | |||
| WO2002070581A1 | 2002-09-12 | |||
| US3517062A | 1970-06-23 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel