Detection of Aromatic Isocyanates for Polyurethane Production​

Aromatic isocyanates (e.g., TDI, MDI) are key reactants in polyurethane production but pose health risks (carcinogenicity) and affect material stability. Detection ensures worker safety and product performance.

​​Testing Methods​​:

• ​​FTIR Spectroscopy (ISO 1043-1)​​: Identifies functional groups in raw materials to confirm isocyanate content.
• ​​HPLC (EN 14041)​​: Quantifies residual aromatic isocyanates in polyurethane foams, ensuring compliance with EU REACH limits (≤0.1 ppm).
• ​​Gas Chromatography-Mass Spectrometry (GC-MS)​​: Detects trace impurities in high-purity MDI used in medical devices.

​​Case Study​​: A foam manufacturer implemented HPLC testing to verify MDI residues in flexible slabstock foam. Results showed 0.05 ppm, meeting EU REACH requirements and avoiding export bans.

​​Emerging Tech​​: Biosensors using enzyme-linked immunosorbent assays (ELISA) offer rapid on-site detection (<10 minutes) for workplace safety monitoring.