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The bulk catalyst effect of dibutyltin dilaurate (DBTDL) on the reaction of NCO respectively with OH and NH2 was investigated in detail. The results showed that DBTDL had specific catalyst effect on the reaction of NCO with OH and no measurable effect on the reaction of NCO with NH2. In situ Fourier transform infrared spectroscopy (FTIR) used in the reaction injection molding (RIM) process showed...
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