CHEMICALLY END-CAPPED POLYPIPERAZINE PYROPHOSPHATE-MODIFIED AMMONIUM POLYPHOSPHATE WITH HIGH TEMPERATURE RESISTANCE AND PRECIPITATION RESISTANCE, PREPARATION METHOD THEREFOR, AND APPARATUS AND APPLICATION THEREOF

Abstract: disclosed are chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate with high temperature resistance and precipitation resistance, a preparation method therefor, and an apparatus and application thereof. the chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate flame retardant is formed by polypiperazine pyrophosphate modification based on ammonium polyphosphate, followed by end capping; and the polypiperazine pyrophosphate is prepared by polymerization of an intermediate piperazine diphosphate obtained through dehydration condensation of phosphoric acid and piperazine. the chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate flame retardant of the present solution is prepared by using special equipment, which ensures whiteness and thermal stability of product, and improves properties of ammonium polyphosphate. the chemically end-capped polypiperazine pyrophosphate-modified ammonium polyphosphate flame retardant is further applied to preparation of flame-retardant polypropylene, so that flame-retardancy, temperature resistance and precipitation resistance of the flame retardant in a polypropylene system can be improved.

Inventor(s): Zhi HU, Zhiqiang ZHONG, Yuchen WANG, Xiaodi GONG, Tao SHI, Xueliang DING, Qing MEI, Xu XU, Lei ZHOU, Jian CHEN, Qiang LV, Fushun LI, Xin ZHOU, Quanguo HE, Shuying YE, Xiaolin LIU, Gang LIU

CPC Classification: C08G79/04 (Phosphorus linked to oxygen or to oxygen and carbon)

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