125663-07-2Relevant academic research and scientific papers
Study on fluorine-containing polyurethane elastomers based on 2,2-Bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]hexafluoropropane
Xu, Wenzong,Liu, Liang,Wang, Shaoqing,Hu, Yuan
, p. 1324 - 1326 (2014)
A series of fluorine-containing polyurethane elastomers (FPUEs) were synthesized from 2,2-bis[4-(4-amino-2-trifluoromethylphenoxy)- phenyl]hexafluoropropane (BAFPF6P), which was made from 2-chlorobenzotrifluoride and 2,2-bis(4-hydroxyphenyl) hexafluoropropane and characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance, thermogravimetric analysis, microscale combustion colorimeter and contact angle measurement. The results show that the fluorine-containing polyurethane elastomers prepared from BAFPF6P have good thermal stability and low surface tension. Furthermore, fluorine-containing polyurethane elastomers also exhibit good flame retardance and the peak heat release rate and total heat released of fluorine-containing polyurethane elastomer based on BAFPF6P are much lower than those of polyurethane elastomer without the fluorine element.
Preparation method of aromatic diether diamine
-
Paragraph 0051-0056; 0059-0064, (2020/05/02)
The invention belongs to the technical field of diamine monomer synthesis, and particularly relates to a preparation method of aromatic diether diamine. The preparation method comprises the followingsteps: mixing bisphenol AF, a halogenated nitrobenzene compound and a catalyst in a solvent, and carrying out an ether forming reaction to obtain an aromatic diether dinitro compound; and carrying outa reduction reaction on the aromatic diether dinitro compound under the action of a catalyst by taking hydrogen as a reducing agent to obtain the aromatic diether diamine. According to the diamine monomer prepared by the preparation method of aromatic diether diamine disclosed by the invention, the white diamine monomer can be obtained on the premise that recrystallization and other purificationmeans are not needed, so that the good conditions are created for preparing downstream products; the yield of the prepared diamine is greater than 92%, and the purity is greater than 99%; and hydrogenis adopted as a reducing agent to replace hydrazine hydrate with high corrosivity, so that the requirements of reduction reaction on equipment and process conditions are reduced.
