|Table of Contents|

Improvement on the Synthetic Method of Novel Reactive Flame Retardant Intermediate DOPO

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2005年06期
Page:
716-719
Research Field:
Publishing date:

Info

Title:
Improvement on the Synthetic Method of Novel Reactive Flame Retardant Intermediate DOPO
Author(s):
JIANG Jian-zhongCAI Chun
School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
Keywords:
flame retardant synthesis dehydration orthogonal experiments
PACS:
TQ314.248
DOI:
-
Abstract:
9, 10- dihydro- 9- oxa- 10- phosphaphenanthrene- 10- oxide ( DOPO) , a novel flame retardant intermediate, is synthesized from phosphorous trichloride and o - phenylphenol in present of ZnCl2. In this paper DOPO was prepared as a mixture of DOPO and 2c- hydroxydiphenyl- 2- phosphinic acid ( HPPA) . Thus the mixture was dehydrated in toluene solution to give a high purity of DOPO. Factors that influenced the product yield such as mol rat io of OPP: PCl3, the react ion temperature, the react ion t ime and the catalyst amount were discussed. The optimum reaction conditions were determined by orthogonal experiments as follows: mol rat io of OPP: PCl3 is 1: 1. 7; the react ion temperature is 220℃ ; the reaction t ime is 3 h; the catalyst amount is 0. 1% (mass fraction) . In the optimal condition, the yield of DOPO is 96. 2%.

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Last Update: 2013-03-03