SYNERGISTIC ACTION OF SB2O3 WITH BROMINE-CONTAINING FLAME-RETARDANT IN POLYOLEFINS .1. VARIANCE IN THEIR PERFORMANCE VERSUS SB-BR RATIO

被引：10

作者：

HANDA, T

NAGASHIMA, T

EBIHARA, N

机构：

[1] Department of Chemistry, Science University of Tokyo, Tokyo, 1-3 Kagurazaka, Shinjuku-ku

[2] Toshiba Research and Development Center, Kawasaki

来源：

FIRE AND MATERIALS | 1979年 / 3卷 / 02期

关键词：

D O I：

10.1002/fam.810030202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The synergistic action of antimony (Sb) with bromine (Br) was studied for polypropylene‐2,3‐dibromopropylpentabromophenyl ether–Sb2O3 systems at various Sb/Br molar ratios. Oxygen index, weight loss rate and heating value were used to evaluate the retardant effect. Bromine and antimony emission and their material balances were measured by gravimetric and X‐ray fluorometric analysis of heated samples at each reaction time. Retarded HBr formation in the gaseous phase through SbBr3, SbOBr and Sb4O5Br2 was proved by X‐ray diffraction analysis of heated residues and model products. SbBr3 and HBr formation were greatest at Sb/Br ratios of 1/3 and 1/4, respectively, while the highest oxygen index and the lowest weight loss rate and heating value were obtained at 1/4. Consequently, HBr will most probably produce the retardant effect rather than SbBr3. Effective synergistic action at the Sb/Br ratio of 1/4 is explained by presuming the formation of an acidic HBr.SbBr3 complex in the molten phase for the particular reaction pattern of bromine in 2,3‐dibromopropylpentabromophenyl either. Copyright © 1979 Heyden & Son Ltd.

引用

页码：61 / 67

页数：7

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