AQUEOUS BLOCKED POLYISOCYANATE COMPOSITION AND WATER-BORNE COMPOSITION CONTAINING THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide an aqueous blocked polyisocyanate composition which can achieve high coating film curability and excellent flexibility, and to provide a water-borne coating composition containing the same. PSOLUTION: This aqueous blocked polyisocyanate is characterized by being derived from at least the following (1) to (4) components. (1) A polyisocyanate derived from at least one aliphatic or alicyclic diisocyanate monomer and satisfying the following conditions (a) to (c). (a) The concentration of the diisocyanate monomer : ≤3 mass%. (b) The viscosity at 25°C : 50 to 2,000,000 mPa s. (c) The average number of the isocyanate groups : 4.0 to 20. (2) A carboxy group-having diol having a number-average mol.wt. of 200. (3) A blocking agent. (4) An organic amine compound. PCOPYRIGHT: (C)2007,JPO&INPIT