催化作用
异氰酸酯
化学
热稳定性
聚氨酯
组合化学
材料科学
有机化学
作者
Yunfei Guo,Mikko Muuronen,Frédéric Lucas,Rint P. Sijbesma,Željko Tomović
出处
期刊:Chemcatchem
[Wiley]
日期:2023-03-03
卷期号:15 (10)
被引量:9
标识
DOI:10.1002/cctc.202201362
摘要
Abstract The formation of isocyanurate via cyclotrimerization of isocyanates is widely reported to provide a variety of polyurethane materials with improved chemical and physical properties such as weatherability, mechanical properties, thermal stability and flame retardancy. The demand for development of effective and selective catalysts for cyclotrimerization of isocyanates has been increasing. This review comprehensively summarizes catalysts for the cyclotrimerization of isocyanates that have been reported in peer‐reviewed publications and provides a valuable guideline for choosing suitable catalysts to match specific requirements. The catalysts are categorized into two main classes: catalysts operating via a Lewis basic cyclotrimerization mechanism and metal‐containing catalysts. Catalyst structures, reaction conditions, reaction time, catalytic effectivity as well as types of isocyanates whose trimerization is catalyzed are described in detail. In addition, featuring the findings and viewpoints from mechanistic studies, this review aims to stimulate the design and development of new, more efficient catalysts, and to guide further study of the trimerization mechanism with different classes of catalysts.
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