Active
Standard
Most Recent
NBN ISO 15064:2021
Plastics — Aromatic isocyanates for use in the production of polyurethanes — Determination of the isomer ratio in toluenediisocyanate (TDI)
Preview
Summary
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. Method A is applicable to toluenediisocyanate (TDI)
samples containing between 5 % and 95 % of the 2,6-isomer. Method B 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 810 cm-1
and 782 cm-1 (12,3 µm and 13,8 µm).
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. Method A is applicable to toluenediisocyanate (TDI)
samples containing between 5 % and 95 % of the 2,6-isomer. Method B 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 810 cm-1
and 782 cm-1 (12,3 µm and 13,8 µm).
Technical characteristics
| Publisher | Bureau de Normalisation Belge (NBN) |
| Publication Date | 05/28/2021 |
| Page Count | 18 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
No products.