TWO-STEP AND ONE-POT PROCESSES FOR PREPARATION OF ALIPHATIC DIISOCYANATES
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.
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Paragraph 0123-0124; 0125
(2017/02/02)
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