Isocyanate polymerization catalyst, preparation method thereof, and method for preparing polyisocyanate by using same

Abstract

An isocyanate polymerization catalyst, a preparation method thereof and a method for preparing polyisocyanates comprising isocyanurate groups by using the same. The catalyst is a carboxylic acid salt containing a di-quaternary ammonium ion. The structure of the catalyst contains hydroxyl-containing aromatic heterocyclic residues. The catalyst is highly active. Only a small quantity of the catalyst is required for the polymerization of isocyanates. The prepared polyisocyanates have color values lower than 25 Hazen, monomer contents of less than 0.5% by weight, high contents of isocyanurates and low viscosities.

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