Title:
METHOD FOR PRODUCING POLYISOCYANATE BY HEAT INSULATING PHOSGENATION OF PRIMARY AMINE
Document Type and Number:
Japanese Patent JP2006022098
Kind Code:
A
Abstract:
To provide a method capable of setting a desired reaction temperature by minimum expense concerning a production apparatus and avoiding undesirable formation of precipitate and a secondary product in a reactor in the method for producing a simple polyisocyanate by phosgenation of a primary amine.
The method for producing the simple polyisocyanate by phosgenation of a primary amine comprises practicing the reaction in at least two stages and retaining a reaction temperature to 100-220°C by controlling reaction temperature and reaction pressure in the first stage of the method.
Inventors:
KOCH DANIEL
MILLER SPOTSWOOD
SERRA RICARDO
WASTIAN DIETMAR
KIRSCH JUERGEN
WEGENER GERHARD
MILLER SPOTSWOOD
SERRA RICARDO
WASTIAN DIETMAR
KIRSCH JUERGEN
WEGENER GERHARD
Application Number:
JP2005195361A
Publication Date:
January 26, 2006
Filing Date:
July 04, 2005
Export Citation:
Assignee:
BAYER MATERIALSCIENCE AG
International Classes:
C07C263/10; C07B43/10; C07C265/14
Domestic Patent References:
| JPS4849721A | 1973-07-13 |
Foreign References:
| WO2004056756A1 | 2004-07-08 | |||
| US4581174A | 1986-04-08 |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel