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Diazirine-Functionalized Polyurethane Crosslinkers for Isocyanate-Free Curing of Polyol-Based Coatings
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2024-03-05 , DOI: 10.1021/acsapm.4c00266
Felix J de Zwart 1 , Lukas A Wolzak 2 , Keimpe J van den Berg 2 , Miranda J Baran 3 , Jeremy E Wulff 4 , Jitte Flapper 5 , Bas de Bruin 1
Affiliation  

Polyurethane coatings have strong material properties due to the hydrogen bonding inherent to the urethane groups. However, installing this urethane moiety usually requires curing through difficult-to-handle isocyanates. In this work, we show the development of a polyurethane-based crosslinker that can be used to formulate a one-component polyurethane coating with material properties similar to those of isocyanate-based polyurethane coatings. To achieve this, we used diazirine functionalities that generate carbenes upon heating, which react with alcohol functionalities in a polyol to generate a crosslinked network with a high storage modulus.

中文翻译:


用于多元醇涂料无异氰酸酯固化的二氮丙啶官能化聚氨酯交联剂



由于氨基甲酸酯基团固有的氢键,聚氨酯涂料具有很强的材料性能。然而,安装该氨基甲酸酯部分通常需要通过难以处理的异氰酸酯进行固化。在这项工作中,我们展示了一种聚氨酯基交联剂的开发,该交联剂可用于配制单组分聚氨酯涂料,其材料性能与异氰酸酯基聚氨酯涂料相似。为了实现这一目标,我们使用了在加热时生成卡宾的二氮丙啶官能团,该卡宾与多元醇中的醇官能团发生反应,生成具有高储能模量的交联网络。
更新日期:2024-03-05
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