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Research of synthesis process of TDI-TMP curing agent by FT-IR

Chen Huan-qin

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Abstract

The reaction process of toluene diisocyanate-trimethylolpropane(TDI-TMP) was tudied by means of Fourier transform infrared(FT-IR). The FTIR analysis showed that although TMP was not stretching in space, in conditions of large excessive TDI and long reaction time, even if at low temperature, the hydroxyl groups of TMP almost reacted completely. Based on the experiment results, the TDI-TMP prepolymer with small molecular weight and low viscosity was obtained, and the prepolymer is more suitable for separating free TDI from TDI-TMP prepolymer with a thin-film evaporator.

About this research paper

What this paper is about

The reaction process of toluene diisocyanate-trimethylolpropane(TDI-TMP) was tudied by means of Fourier transform infrared(FT-IR). The FTIR analysis showed that although TMP was not stretching in space, in conditions of large excessive TDI and long reaction time, even if at low temperature, the hydroxyl groups of TMP almost reacted completely. Based on the experiment results, the TDI-TMP prepolymer with small molecular weight and low viscosity was obtained, and the prepolymer is more suitable for separating free TDI from TDI-TMP prepolymer with a thin-film evaporator.

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Available abstract

The reaction process of toluene diisocyanate-trimethylolpropane(TDI-TMP) was tudied by means of Fourier transform infrared(FT-IR). The FTIR analysis showed that although TMP was not stretching in space, in conditions of large excessive TDI and long reaction time, even if at low temperature, the hydroxyl groups of TMP almost reacted completely. Based on the experiment results, the TDI-TMP prepolymer with small molecular weight and low viscosity was obtained, and the prepolymer is more suitable for separating free TDI from TDI-TMP prepolymer with a thin-film evaporator.

Key concepts: Prepolymer, Materials science, Curing (chemistry), Toluene diisocyanate, Fourier transform infrared spectroscopy, Trimethylolpropane, Hydroxyl value, Toluene

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