Isoda Kyosuke, Matsumoto Shuya, Sakabe Masato, Morisako Shogo, Aihara Hidenori, Nakashima Yuhei
Organic Materials Chemistry Group, Sagami Chemical Research Institute, 2743-1 Hayakawa, Ayase, Kanagawa 252-1193, Japan.
Tokyo Research Center, Tosoh Corporation, 2743-1 Hayakawa, Ayase, Kanagawa 252-1123, Japan.
ACS Omega. 2025 Aug 4;10(32):36606-36612. doi: 10.1021/acsomega.5c05546. eCollection 2025 Aug 19.
A significant portion of global energy consumption has been due to the building sector, highlighting the urgent need for highly efficient thermal insulation materials. Among these, polyurethane has gained widespread use due to its excellent insulation performance. However, its inherent flammability remains a major concern, necessitating further enhancement of its flame-retardant as well as thermal insulating properties. The development of novel spiro-type cyclic phosphazene derivatives designed to simultaneously improve both the thermal insulation and flame retardancy of rigid polyurethane foams (RPUFs) has been carried out. The phosphazene derivatives () can be readily produced on a 50 g scale, exhibit high thermal stability, and possess char-promoting capabilities for flame resistance. When incorporated into RPUFs at a low loading of 5 wt %, effectively suppressed the time-dependent deterioration of thermal conductivity (<λ = 25 mW/m·K), while promoting a high limiting oxygen index of 28.3%. This demonstrates the potential of this new class of spiro-type cyclic phosphazene-based additives for advanced flame-retardant and thermal insulating materials for building applications.
全球能源消耗的很大一部分归因于建筑领域，这凸显了对高效隔热材料的迫切需求。其中，聚氨酯因其优异的隔热性能而得到广泛应用。然而，其固有的易燃性仍然是一个主要问题，因此需要进一步提高其阻燃性能和隔热性能。旨在同时改善硬质聚氨酯泡沫（RPUF）的隔热和阻燃性能的新型螺环型环状磷腈衍生物已经研发出来。磷腈衍生物（）可以很容易地以50克规模生产，具有高的热稳定性，并具有促进成炭的阻燃能力。当以5 wt%的低负载量掺入RPUF中时，有效地抑制了热导率随时间的恶化（<λ = 25 mW/m·K），同时促进了28.3%的高极限氧指数。这证明了这类新型螺环型环状磷腈基添加剂在建筑应用中的先进阻燃和隔热材料方面的潜力。
