POLYISOCYANATE COMPOSITION EXCELLENT IN MECHANICAL PROPERTY AND TACK RESISTANCE

摘要

PROBLEM TO BE SOLVED: To obtain a sealing material which uses a polyisocyanate composition having a slight urethane bond in a resin, a low viscosity, containing no low- molecular weight compound to cause reduction in surface tack and has especially a low modulus and is excellent in stain resistance and tack resistance. SOLUTION: This polyisocyanate composition is characterized by comprising (A) an isocyanate terminal prepolymer obtained from an aliphatic and/or alicyclic diisocyanate monomer and (B) 1-50 wt.% based on the isocyanate terminal prepolymer of at least one or more kinds selected from organic solvents. This sealing material is obtained by using the polyisocyanate composition.