Lerner, David, Littenberg, Krumholz & Mentlik, LLP
Isocyanate polymerization catalyst, preparation method thereof, and method for preparing polyisocyanate by using same
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.
Wanhua Chemical Group Co., Ltd.
C C C B C C C C C C C C C C C B
C07D C08G C08G B01J C07D C07D C08G C08G C08G C08G C08G C08G C08G C07C C07D B01J
inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional
Bin Yuqi Wei Weiqi Yuan Lidong Yonghua
Shi Wang Liu Hua Li Sun Shang