Aliphatic polyamines from polynitro compounds.

摘要

Diamines or triamines are prepared by reacting a nitroalcohol with an isocyanate or isocyanate prepolymer to form a nitro compound, and catalytically hydrogenating the nitrocompound to the corresponding amino. When an isocyanate prepolymer, obtained by reacting a polyether polyol with excess of a polyisocyanate, is employed, the resulting amine will include both soft segments containing polyether groups, and hard segments containing urethane groups.