Polyisocyanate curing agent and coating and adhesive cmpositions containing it.

摘要

A curing agent for a two-component polyurethane has as its main constituent a hexamethylene diisocyanate-derived polyisocyanate having a viscosity below 1,400 mPa.s/25 DEG C substantially free from monomeric hexamethylene diisocyanate and from solvent, and having an uretidine dione dimer content of greater than 10% and an isocyanurate cyclic trimer content of less than 60%.