With regulations increasingly restricting the isocyanate use, exploring greener alternatives has become imperative. Extensive research of health-friendlier synthesis processes triggered the emergence of a new f
Non-isocyanate polyurethane- co -polyglycolic acid electrospun nanofiber membrane wound dressing with high biocompatibility, hemostasis, and prevention of chronic wound formationThe prevention of chronic wound formation has already been a primary subject in wound management, particularly for deep wounds. ...
Here we demonstrate a chemical recycling technique that prevents the loss of functionality to lignin and produces a recycled precursor capable of entering back into the synthetic sequence for non-isocyanate polyurethane foams. This technique enables the depolymerization of the polymer and isolation of ...
1. A non-isocyanate functional flexibilizer having the formula: B-C(O)-NW-A-NX-C(O)-K wherein A is selected from the group consisting of polyesters, polyamides, polyureas, polyurethanes, acrylics; biuret, allophonate and urethane extended polyesters; wherein B and K are selected from the...
Non-Isocyanate and Catalyst-Free Synthesis of a RecyclablePolythiourethane with Cyclic StructureShuang Wu, Ming Luo,* Donald J. Darensbourg,* Dandan Zeng, Yuhua Yao, Xiaobing Zuo, Xin Hu,and Dawei TanCite This: ACS Sustainable Chem. Eng. 2020, 8, 5693−5703 Read OnlineACCESSMetrics &...
Reduced toxicity and reduced skin sensitization or irritation can be achieved at least in part by the exclusion of isocyanates and/or isocyanate degradation or reaction products. In some embodiments, an ink for use in a 3D printing system described herein comprises a cyclic carbonate monomer and ...
Recently, R. Mülhaupt et al. introduced the first high yielding synthesis of erythritol bis(carbonate) from erythritol with diphenyl carbonate (DPC) as reagent. They utilized it as monomer for the synthesis of non-isocyanate polyurethanes (NIPUs). Here,
专利名称：NON-ISOCYANATE SPRAY FOAMS 发明人：OLANG, Fatemeh, Nassreen 申请号：US2011/049932 申请日：20110831 公开号：WO2012/030936A1 公开日：20120308 专利内容由知识产权出版社提供 摘要：One- and two-part spray non-isocyanate foams that include an amide-based oligomer containing pendant carboxylic ...
Synthesis principle and performance characteristic of nonisocyanate polyurethane were summarized. 简要概述了非异氰酸酯聚氨酯(NIPU)的合成原理与性能特点,介绍了典型NIPU、杂化非异氰酸酯聚氨酯(HNIPU)、硅氧烷改性非异氰酸酯聚氨酯、丙烯酸改性杂化非异氰酸酯聚氨酯(A-HNIPU)等几种非异氰酸酯聚氨酯的研究进展,展望...
This has driven the development of new chemical strategies to access non-isocyanate PUs, or NIPUs. While the traditional PU synthesis typically occurs at room temperature (r.T) due to the high reactivity of isocyanates, NIPU synthesis generally requires elevated temperatures to surpass the low ...