无溶剂柔性环氧膨胀型防火涂料

IF 2.3 4区 材料科学 Q2 CHEMISTRY, APPLIED Journal of Coatings Technology and Research Pub Date : 2024-04-09 DOI:10.1007/s11998-024-00918-3
Chen Ling, Rudong Zhou, Yanli Xiang, Jianbo Fang, Xu Meng, Qiang Ren, Chenyi Wang
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引用次数: 0

摘要

无溶剂环氧基膨胀型防火涂料因其出色的整体保护性能,在石化设施等恶劣环境中具有重要意义。然而,高交联结构导致的低温脆性和有限膨胀性仍然是一个难题。为解决这一难题,本研究使用壬二酸(AA)和十二烷二酸(DA)作为碳数为奇数和偶数的二元酸,合成了具有不对称结构和低粘度的环氧端聚酯低聚物。对这些聚酯的化学结构进行了深入研究。其中,以 AA 和 DA 的摩尔比为 1:3 制备的聚酯(ADE)被优化为一种合适的增韧剂,可用于基于 E-51 环氧树脂的无溶剂膨胀型防火涂料。详细研究了 ADE 用量对热稳定性、耐火性能、柔韧性和抗冻裂性能的影响。研究结果表明,在 ADE/E-51 混合物中加入 50%的 ADE 可使涂膜具有适当的玻璃化转变温度和热变形性能,从而与膨胀型阻燃体系的膨胀行为相匹配。以这种方法配制的涂层具有最佳的防火性能、韧性和抗冻裂性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Solvent-free flexible epoxy intumescent fire-retardant coatings

Solvent-free epoxy-based intumescent fire-retardant coatings are of significant importance in harsh environments, such as petrochemical facilities, due to their excellent overall protection performance. However, the challenge of low-temperature brittleness and limited intumescence resulting from a highly crosslinked structure still persists. In this study, epoxy-terminated polyester oligomers with an asymmetric structure and low viscosity were synthesized using azelaic acid (AA) and dodecanedioic acid (DA) as dibasic acids with odd and even carbon numbers to address this challenge. The chemical structures of these polyester were thoroughly characterized. Among them, the polyester prepared with a molar ratio of 1:3 for AA and DA (ADE) was optimized as a suitable toughener for solvent-free intumescent fire-retardant coatings based on E-51 epoxy resin. The influence of ADE dosage on thermal stability, fire resistance performance, flexibility, and freeze cracking resistance was investigated in detail. The findings demonstrated that incorporating 50% ADE in ADE/E-51 blends resulted in coating film with an appropriate glass transition temperature and thermal deformation property to match the intumescence behavior of intumescent flame-retardant system. The coating formulated in this way exhibited the best fire protective performance, toughness and freeze cracking resistance.

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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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