ISO 15064:2017
Plastics — Aromatic isocyanates for use in the production of polyurethanes — Determination of the isomer ratio in toluenediisocyanate (TDI)
ISO 15064:2017 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).
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling
5 Principle
5.1 Method A
5.2 Method B
6 Reagents
7 Apparatus
8 Test conditions
9 Method A — Samples containing between 5 % and 95 % of 2,6-TDI
9.1 Calibration
9.2 Procedure
9.3 Expression of results
9.4 Precision and bias
9.4.1 Precision
9.4.2 Bias
9.5 Test report
10 Method B — Samples containing 0 % to 5 % of 2,6-TDI
10.1 Calibration
10.2 Procedure
10.3 Expression of results
10.4 Precision and bias
10.4.1 Precision
10.4.2 Bias
10.5 Test report
Annex A (normative) Calibration curves
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling
5 Principle
5.1 Method A
5.2 Method B
6 Reagents
7 Apparatus
8 Test conditions
9 Method A — Samples containing between 5 % and 95 % of 2,6-TDI
9.1 Calibration
9.2 Procedure
9.3 Expression of results
9.4 Precision and bias
9.4.1 Precision
9.4.2 Bias
9.5 Test report
10 Method B — Samples containing 0 % to 5 % of 2,6-TDI
10.1 Calibration
10.2 Procedure
10.3 Expression of results
10.4 Precision and bias
10.4.1 Precision
10.4.2 Bias
10.5 Test report
Annex A (normative) Calibration curves