›› 2025, Vol. 39 ›› Issue (5): 37-40.

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阻燃增强PBT的灼热丝性能研究

沈彬,刘志刚,李二响   

  1. 南通开普乐工程塑料有限公司
  • 收稿日期:2024-05-24 修回日期:2024-07-18 出版日期:2025-04-26 发布日期:2025-04-26

Study on glow-wire ignition performance of flame-retardant reinforced PBT

  • Received:2024-05-24 Revised:2024-07-18 Online:2025-04-26 Published:2025-04-26

摘要: 通过卤素阻燃剂与磷系、氮系、磷氮系阻燃剂的多元复配,对阻燃增强聚对苯二甲酸丁二醇酯(PBT)的灼热丝性能进行研究。采用溴化聚苯乙烯、三氧化二锑、二乙基次磷酸铝(ADP)、三聚氰胺氰尿酸盐(MCA)、三聚氰胺聚磷酸盐(MPP)、成碳型复合无卤阻燃剂(KCP)等阻燃剂体系进行复配实验。结果表明,单一的卤素或者无卤阻燃剂体系的增强PBT材料无法满足IEC60335-1关于无人看管电器载流部件的灼热丝性能指标要求,通过不同类型阻燃剂复配,利用溴-氮-磷协同阻燃,最终可以实现最高同时满足GWIT>825 ℃、GWFI>960 ℃、UL 94 V-0的PBT增强材料。

关键词: 聚对苯二甲酸丁二醇酯 , 阻燃, 高灼热丝, 起燃温度, 增强

Abstract: In this study, flame-retardant reinforced PBT compounds were prepared through a multi-component combination of halogen flame retardants with phosphorus, nitrogen, and phosphorus-nitrogen-based flame retardants, and their glow-wire ignition temperature (GWIT) was investigated. Brominated polystyrene, antimony trioxide, diethylaluminum hypophosphate, melamine cyanurate, melamine polyphosphate, and carbon-based composite halogen-free flame retardant were used as flame retardants to compound with the reinforced PBT for flame-retardant experiments. The enhanced PBT compound only with halogen flame retardant or with halogen-free flame-retardant system cannot meet the requirements of IEC60335-1 for the GWIT of current carrying components in unmanned electrical appliances. By a combination of different types of flame retardants and the use of bromine-nitrogen-phosphorus synergistic flame retardant, the enhanced PBT could ultimately achieve the best flame-retardant performance and simultaneously meet the requirements of flame-retardant standard at GWIT>825 ℃, GWFI>960 ℃, and UL 94 V-0.

Key words: polybutylene terephthalate, flame retardant, high glow-wire ignition temperature, ignition temperature, reinforcement