Patent ID: 6080812
Filing Date: 2000-06-27
Classification: C08G

Abstract:
A method for producing water-dispersible blocked isocyanate composition, comprising:addition-reacting a low-molecular glycol with an organic isocyanate to obtain a first product;adding to said first product an isocyanurate-forming catalyst to introduce into said first product an isocyanurate ring structure to obtain a second product;removing the free organic isocyanate from said second product to obtain a substantially monomeric organic isocyanate free third product;reacting a hydrophilic surfactant with said third product to obtain an isocyanurate group-terminated precursor; andreacting a blocking agent for blocking a free isocyanate group of said isocyanurate group-terminated precursor with said isocyanurate group-terminated precursor to obtain said water-dispersible blocked isocyanate composition.