ISO 15064:2017 PDF

Plastics — Aromatic isocyanates for use in the production of polyurethanes — Determination of the isomer ratio in toluenediisocyanate (TDI)

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Title (English):

ISO 15064:2017

Plastics — Aromatic isocyanates for use in the production of polyurethanes — Determination of the isomer ratio in toluenediisocyanate (TDI)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 10
Publication date:: June 30, 2017
Edition:: ISO IS 15064 edition 3 version 1
ICS:: 83.080.10

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Description (English):

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).

Technical details

Technical committee: ISO/TC 61/SC 12 - Thermosetting materials
SKU: ISO 15064:2017

Abstract

Overview

ISO 15064:2017 specifies laboratory methods for determining the isomer ratio in toluenediisocyanate (TDI) mixtures used to produce polyurethanes. The standard describes two infrared-based analytical procedures (Method A and Method B) that quantify the proportions of 2,4‑TDI and 2,6‑TDI by measuring characteristic aromatic C–H deformation absorption bands. ISO 15064:2017 is essential for accurate TDI isomer ratio measurement in quality control, regulatory compliance and materials R&D.

Key topics and technical requirements

Analytical principle: Quantitative infrared spectroscopy (single/double-beam or FTIR) of absorption bands at 810 cm−1 (2,4‑TDI) and 782 cm−1 (2,6‑TDI) corresponding to out-of-plane C–H deformation vibrations (12.3 μm and 13.8 μm).
Two methods to cover the full composition range:
- Method A: For samples containing 5 % to 95 % 2,6‑TDI. Uses diluted solutions (cyclohexane) and the 810/782 absorbance ratio referenced to calibration curves.
- Method B: For low 2,6‑TDI content (0 % to 5 %). Measures the 782 cm−1 band in undiluted samples against a dedicated calibration curve.
Sample preparation and calibration:
- Use reagent‑grade cyclohexane and pure 2,4‑TDI / 2,6‑TDI standards to prepare calibration mixtures.
- Method A: sealed NaCl liquid cell with 0.2 mm path length; Method B: 0.1 mm path length. Path lengths must be known to ±0.002 mm.
- Construct calibration curves (absorbance ratio vs. mass ratio or % mass) for accurate conversion.
Laboratory conditions & safety:
- Isocyanates react with moisture - maintain low humidity (preferably

Related standards

Other ISO standards

Overview

Key topics and technical requirements

Analytical principle: Quantitative infrared spectroscopy (single/double-beam or FTIR) of absorption bands at 810 cm−1 (2,4‑TDI) and 782 cm−1 (2,6‑TDI) corresponding to out-of-plane C–H deformation vibrations (12.3 μm and 13.8 μm).
Two methods to cover the full composition range:
- Method A: For samples containing 5 % to 95 % 2,6‑TDI. Uses diluted solutions (cyclohexane) and the 810/782 absorbance ratio referenced to calibration curves.
- Method B: For low 2,6‑TDI content (0 % to 5 %). Measures the 782 cm−1 band in undiluted samples against a dedicated calibration curve.
Sample preparation and calibration:
- Use reagent‑grade cyclohexane and pure 2,4‑TDI / 2,6‑TDI standards to prepare calibration mixtures.
- Method A: sealed NaCl liquid cell with 0.2 mm path length; Method B: 0.1 mm path length. Path lengths must be known to ±0.002 mm.
- Construct calibration curves (absorbance ratio vs. mass ratio or % mass) for accurate conversion.
Laboratory conditions & safety:
- Isocyanates react with moisture - maintain low humidity (preferably

ISO 15064:2017 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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