Method for preparing flame-retardant cellulosic fibers

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United States of America Patent

PATENT NO 11124900
SERIAL NO

17058141

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Abstract

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A type of flame-retardant cellulosic fiber and a preparation method thereof are disclosed. The preparation method includes extruding the cellulosic solution through a spinneret, coagulating, stretching, and water-washing to obtain a water-washed filament, which is then treated with a flame-retardant solution, and then rinsed and dried to prepare the flame-retardant cellulosic fiber. The water-washing temperature is ≤90° C., the temperature of the flame-retardant solution during treatment is 60-90° C., and the rinsing temperature is 20-40° C. The flame retardant contains more than one of a group that forms a covalent bond with a hydroxy group of the cellulosic macromolecule, a group having the ability of self-crosslinking reaction, and a group that forms a hydrogen bond with a hydroxy group of the cellulosic macromolecule. The prepared flame-retardant cellulosic fiber is mainly composed of the cellulosic fiber matrix and the flame retardant dispersed in the matrix.

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Patent Owner(s)

Patent OwnerAddress
DONGHUA UNIVERSITY201620 NO 2999 RENMIN ROAD XINCHENG DISTRICT SHANGHAI SONGJIANG DISTRICT SONGJIANG SHANGHAI CITY SHANGHAI CITY 201620

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cui, Shiqiang Shanghai, CN 15 12
Jin, Hong Shanghai, CN 67 755
Liu, Yan Shanghai, CN 664 5733
Wang, Tiehan Shanghai, CN 1 0
Zhang, Yang Shanghai, CN 898 4769
Zhang, Yumei Shanghai, CN 13 44

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