POLYISOCYANATE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a storage-stable curing agent for a two pack-type polyurethane coating composition by using a specific polyisocyanate. SOLUTION: The curing agent is a polyisocyanate composition obtained from an aliphatic and/or an alicyclic diisocyanate. The polyisocyanate composition has a biuret structure and an isocyanulate structure obtained by conducting a biuret reaction prior to or after an isocyanulate reaction and substantially removing unreacted diisocyanate. The ratio of the mole of the biuret structure (A) to the mole of the isocyanulate structure (B): (A)/(B) is 1/99-60/40. COPYRIGHT: (C)2007,JPO&INPIT