A phosphinic acid salt modified montmorillonite composite flame retardant and a preparation method thereof
By generating chemically anchored bimetallic phosphonates on the surface of montmorillonite, the thermal decomposition and phase separation problems caused by quaternary ammonium salt modification were solved, achieving efficient flame retardancy and improved material mechanical properties, broadening the processing temperature range and reducing smoke generation.
CN122404804APending Publication Date: 2026-07-17XINJIANG INST OF ENG
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XINJIANG INST OF ENG
- Filing Date
- 2026-06-02
- Publication Date
- 2026-07-17
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Figure CN122404804A_ABST
Abstract
本申请涉及阻燃材料领域，公开了一种次膦酸盐改性蒙脱土复合阻燃剂及其制备方法。阻燃剂由钠基蒙脱土、可溶性铝盐、可溶性锌盐和二烷基次膦酸钠制成。制备方法包括：将钠基蒙脱土分散于去离子水中；加入可溶性铝盐与可溶性锌盐的混合溶液，在微酸性环境下进行恒温预插层反应；加入二烷基次膦酸钠溶液进行原位沉淀反应，固液分离后洗涤干燥。本发明利用铝离子和锌离子在蒙脱土表面配位桥接，与次膦酸根原位沉淀生成双金属次膦酸盐，替代了热分解温度低的季铵盐。烷基长链降低了表面极性，改善了阻燃剂在聚合物基体中的分散性并维持了力学强度。燃烧时化学锚定的组分快速交联成炭，生成致密陶瓷阻隔层，降低热释放速率与总生烟量。
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