Polyurethane coating compositions prepared from a polymeric diol, an alicyclic diisocyanate, an alicyclic diamine and either hydrazine or isophthalic acid dihydrazide

摘要

Polyurethane compositions comprising a polyurethane synthesized by reacting a diol, a specific alicyclic diisocyanate, a specific alicyclic diamine and hydrazine or isophthalic acid dihydrazide in specific proportions and a solvent therefor have good solution stability and, when applied as coating compositions, give coats with good light stability, good surface properties, high softening points and sufficient flexibility at low temperatures.