BS ISO 15064:2017
Current
The latest, up-to-date edition.
Plastics. Aromatic isocyanates for use in the production of polyurethanes. Determination of the isomer ratio in toluenediisocyanate (TDI)
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English
07-28-2017
This document specifies methods for the measurement of toluene-2,6-diisocyanate in mixtures of the 2,4- and 2,6-isomers. Two methods based on infrared spectroscopy are used to give accurate results over a broad range of isomer concentrations. MethodA is applicable to toluenediisocyanate (TDI) samples containing between 5% and 95% of the 2,6-isomer. MethodB is applicable to TDI samples containing 0% to 5% of the 2,6-isomer. Both methods are based on the quantitative measurement of absorption bands arising from out-of-plane C−H deformation vibrations of the aromatic ring at 810cm−1 and 782cm−1 (12,3μm and 13,8μm).
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