Method for dimerisation ispohorone diisolyanate

Method for dimerisation ispohorone diisolyanate

  • CN 100,509,898 C
  • Filed: 05/07/2002
  • Issued: 07/08/2009
  • Est. Priority Date: 05/14/2001
  • Status: Active Grant
First Claim
Patent Images

1. method for preparing the polyisocyanates that contains uretdion groups, comprise:

  • some isocyanate groups of isophorone diisocyanate carries out oligomeric in the presence of the catalyzer that can quicken the isocyanate groups dimerization, randomly the oligomeric degree in regulation stops oligomerization by adding catalyzer poison, and randomly remove excessive unreacted vulcabond by extraction or thin film distillation, it is characterized in that, use salt type compound as oligomerisation catalyst, described salt type compound comprises in negatively charged ion, is 66 C by molecular weight 2N 3Calculate 10~

    97.1 weight %1,2,3-and/or 1,2,4-triazole structure.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×