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immediate downloadReleased: 2017-07-28
BS ISO 15064:2017
Plastics. Aromatic isocyanates for use in the production of polyurethanes. Determination of the isomer ratio in toluenediisocyanate (TDI)
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| Standard number: | BS ISO 15064:2017 |
| Pages: | 20 |
| Released: | 2017-07-28 |
| ISBN: | 978 0 580 93948 8 |
| Status: | Standard |
DESCRIPTION
BS ISO 15064:2017
This standard BS ISO 15064:2017 Plastics. Aromatic isocyanates for use in the production of polyurethanes. Determination of the isomer ratio in toluenediisocyanate (TDI) is classified in these ICS categories:
- 83.080.10 Thermosetting materials
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).