2012•Chemical engineerRequires access

Synthesis of low free toluene diisocyanate(TDI) polyurethane curing agent

Zhang Ju-sheng

Abstract

The harmless low free toluene diisocyanate(TDI) polyurethane curing agent was synthesized by catalytic polymerization.The best reaction conditions were determined by orthogonal test.The results showed the free TDI content was lower when W2030-low molecular weight alcohols adding in the system.The TDI residue amount in curing agent was lower than 0.5% under best conditions.The activation energy was calculated by dynamics and compared to TDI-TMP system.The results showed that TDI-W2030-mixture system has lower activation energy compared to TMP-TDI system,and it's suitable for preparing low free TDI curing agent.

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Key concepts: Toluene diisocyanate, Polyurethane, Curing (chemistry), Toluene, Chemistry, Residue (chemistry), Catalysis, Hexamethylene diisocyanate