Title:
METHOD FOR PRODUCING DIAMINE AND POLYAMINE OF DIPHENYLMETHANE SERIES
Document Type and Number:
Japanese Patent JP2009227677
Kind Code:
A
Abstract:
To provide a new method leading to improvement of coloration of a produced diamine/polyamine mixture of diphenylmethane series or coloration of isocyanate and polyurethane produced from the mixture.
In the method for producing diamines and polyamines of diphenylmethane series by reacting aniline with formaldehyde in the presence of an acid catalyst, the aniline to be used contains totally less than 0.5 wt.% of one or more compounds which contain at least one carbonyl group or one or more compounds that are formed by reaction of these compounds which contain at least one carbonyl group with aniline, based on the total weight of the aniline.
Inventors:
WERSHOFEN STEFAN
MUELLER HEINZ-HERBERT
ADAMSON RICHARD
POHL FRITZ
SOMMER KNUT
MUELLER HEINZ-HERBERT
ADAMSON RICHARD
POHL FRITZ
SOMMER KNUT
Application Number:
JP2009069305A
Publication Date:
October 08, 2009
Filing Date:
March 23, 2009
Export Citation:
Assignee:
BAYER MATERIALSCIENCE AG
International Classes:
C07C209/78; C07C211/53; C07C263/10; C07C265/14; C07B61/00
Domestic Patent References:
| JP2002502838A | 2002-01-29 |
Other References:
JPN6013023408; Ａｌｄｒｉｃｈ Ｃａｔａｌｏｇ Ｈａｎｄｂｏｏｋ ｏｆ Ｆｉｎｅ Ｃｈｅｍｉｃａｌｓ １９９０-１９９１, ｐ．１００
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Takahashi
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Takahashi
Kimihiro Hoshi
Hiroyasu Ninomiya
Einzel Felix-Reinhard
Reinhard Einsel