102016-85-3Relevant academic research and scientific papers
TWO-STEP AND ONE-POT PROCESSES FOR PREPARATION OF ALIPHATIC DIISOCYANATES
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Paragraph 0112-0113; 0121-0122, (2017/02/02)
The present invention relates to using a two-step (thermolysis) or one-pot process to prepare aliphatic diisocyanates from aliphatic diamines and diaryl carbonates. Polyisocyanates can also be prepared from polyamines and diaryl carbonates. The present synthetic processes do not apply phosgene or highly toxic reagents and chloro-solvents during the entire procedure.
Two-stage method and one-pot synthesis method for preparing aliphatic diisocyanate
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Paragraph 0139; 0140; 0141; 0142; 0168-0173, (2017/10/11)
The invention relates to a two-stage method and one-pot synthesis method for preparing aliphatic diisocyanate. The two-stage method or the one-pot synthesis method is adopted for preparing aliphatic diisocyanate through aliphatic diamine and diaryl carbonic ester. Also, aliphatic polyamine and diaryl carbonic ester also can be used for preparing polyisocyanates. According to the synthesis method provided by the invention, phosgene or highly toxic reagents and a chlorinated solvent are not adopted during the whole process.
