Toluene diisocyanate TDI TDI trimer

admin — Thu, 11 Aug 2022 09:23:31 +0000

Toluene diisocyanate (TDI) can undergo trimerization under catalytic action to form trimers containing isocyanurate rings. TDI trimer has the advantages of low volatility, low toxicity, high functionality, good thermal stability, good corrosion resistance, etc. It is often used as a polyurethane-curing agent in coatings and adhesives. In the 1970s, many foreign companies began to industrially produce and apply such products, such as Bayer, BASF, Dow, etc. At present, high-performance, low-free monomer TDI trimers still need to rely heavily on imports.
In this study, the catalyst NT CAT P100 was used to synthesize TDI trimer polyurethane curing agent. The experimental results show that the catalyst has the advantages of a fast catalytic rate, high activity, and low reaction temperature. At 40 ℃, the reaction was catalyzed by dropwise addition, and the end of the reaction could be reached within 8 h, resulting in a low free monomer content TDI trimer.

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Toluene diisocyanate TDI TDI trimer