METHOD FOR MANUFACTURING TYPE II AMMONIUM POLYPHOSPHATE HAVING HIGH HEAT RESISTANCE

METHOD FOR MANUFACTURING TYPE II AMMONIUM POLYPHOSPHATE HAVING HIGH HEAT RESISTANCE

PROBLEM TO BE SOLVED: To provide a method for manufacturing ammonium polyphosphate having type II crystal form, excellent in heat resistance, fluidity and manifesting a low viscosity of water dispersed slurry, without using a complicated equipment and process. SOLUTION: This method is to manufacture...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NARITA KENSHO, WATANABE MASAMI
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method for manufacturing ammonium polyphosphate having type II crystal form, excellent in heat resistance, fluidity and manifesting a low viscosity of water dispersed slurry, without using a complicated equipment and process. SOLUTION: This method is to manufacture type II ammonium polyphosphate by dehydrating and condensing a phosphoric anhydride and ammonium phosphate at 140-330 deg.C while agitating and mixing in the presence of ammonium gas, and 0.05-4 wt.% of a triazine compound based on total stock amounts is added at a moment when a molar ratio of the ammoniacal nitrogen/phosphorus of the reaction product of the phosphoric anhydride and ammonium phosphate reaches 0.85-1.