Title:
MANUFACTURING PROCESS OF CYCLIC CHLOROPHOSPHAZENE OLIGOMER
Document Type and Number:
Japanese Patent JP3778897
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing process of a chlorophosphazene oligomer, especially its trimer and tetramer in a high yield and high selectivity.
SOLUTION: The manufacturing process comprises reacting chlorinated phosphorus with ammonium chloride in the presence of a reaction catalyst under the following conditions. (1) The amount of water contained in the reaction system is ≤ 5×10-3 mol per 1 mol of the chlorinated phosphorus. (2) The ammonium chloride has an average particle diameter of ≤ 10 μm and a particle distribution of ≥ 2 as calculated by Rosin-Rammler equation. (3) The feed rate of the chlorinated phosphorus into the reaction system is 5×10-2-5 mol/hr per 1 mol of the ammonium chloride. (4) The reaction medium is at least one kind selected from dichlorobenzenes and monochlorobenzenes.
Inventors:
Kotaro Kuwata
Application Number:
JP2003004153A
Publication Date:
May 24, 2006
Filing Date:
January 10, 2003
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C01B21/098; C08G79/02; C08G79/025; (IPC1-7): C01B21/098; C08G79/02
Domestic Patent References:
| JP58019604B2 | ||||
| JP62039534A |
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