Process for preparation of aliphatic diisocyanate compounds

Details Process for preparation of aliphatic diisocyanate compounds Process for preparation of aliphatic diisocyanate compounds

1997-09-30

1998-08-04

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

560158, C07C26300

Patent

active

057896143

ABSTRACT:
An aliphatic diisocyante compound is prepared in a high yield by reacting dimethyl carbonate with an aliphatic diamine in the presence of an alkali catalyst to produce a corresponding urethene compound; and, within 48 hours after the completion of the preparation of the urethane compound, thermally decomposing the urethane compound under a reduced pressure of 1 to 700 Torr in a high-boiling-point solvent.

REFERENCES:
patent: 4395565 (1983-07-01), Romano et al.

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