基于 HGB 和 DOPO 衍生物协同效应的阻燃水性聚氨酯

IF 2.3 4区 材料科学 Q2 CHEMISTRY, APPLIED Journal of Coatings Technology and Research Pub Date : 2024-09-11 DOI:10.1007/s11998-024-00983-8
Jiale Qu, Guorui Leng, Han Yu, Guorong Li, Shanshan Wang, Yonggen Weng, Baorong Duan, Junjie Liu
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引用次数: 0

摘要

水性聚氨酯(WPU)的极限氧指数(LOI)仅为 18.0%,其固有的可燃性阻碍了它在汽车工业、家具涂料、皮革和其他领域的广泛应用。因此,提高 WPU 的防火安全性势在必行。本研究报告介绍了新型反应性阻燃剂的合成及其在 WPU 上的化学接枝,以改善其易燃性弱点。以新型阻燃剂中间体 9,10-二氢-9-氧杂-10-磷菲-10-氧化物(DOPO)和对羟基苯甲醛为前体,制备了磷基阻燃剂(DOPO)。用硅烷偶联剂(KH550)对中空玻璃微球(HGB)进行改性,并将其加入到 WPU 预聚物中。最后,在 DOPOs 的羟基和改性 HGB 之间进行化学接枝,生成参与预聚的双组分阻燃剂。在 WPU 中添加 2 wt%的协同阻燃剂可将其 LOI 提高到 26%,并消除燃烧过程中的滴落现象。
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Flame-retardant waterborne polyurethane based on the synergistic effect of HGB and DOPO derivatives

The inherent combustibility of waterborne polyurethane (WPU) with a limiting oxygen index (LOI) of only 18.0% has impeded its versatile applications in the automotive industry, furniture coatings, leather, and other domains. Therefore, enhancing the fire safety of WPU is imperative. This work reports the synthesis of novel reactive flame retardants and their subsequent chemical grafting onto WPU to ameliorate its flammability weakness. Using the novel flame-retardant intermediate 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and para-hydroxybenzaldehyde as precursors, phosphorus-based flame retardants (DOPOs) were prepared. Hollow glass microspheres (HGB) were modified with a silane coupling agent (KH550) and incorporated into the WPU prepolymerization. Finally, chemical grafting occurred between the hydroxyl groups of DOPOs and the modified HGB to produce dual-component flame retardants involved in the prepolymerization. The addition of 2 wt% synergistic flame retardants to WPU increased its LOI to 26% and eliminated dripping during combustion.

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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research 工程技术-材料科学:膜
CiteScore
4.30
自引率
8.70%
发文量
130
审稿时长
2.5 months
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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