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Flash point

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Description of key information

MDI/DPG/TPG prepolymer is a viscous liquid at room temperature and has a flash point of 206 °Cat 747 mm Hg.

Key value for chemical safety assessment

Additional information

MDI/DPG/TPG prepolymer has a flashpoint of 206 °C at 747 mm Hg using ASTM D-93 method.

When 4,4'-MDI is heated a bit above room temperature, it becomes a liquid. Hence, a flashpoint could be determined of liquid 4,4'-MDI. The flashpoint determined is 211 degrees Celsius at 1000 hPa according to EU Method A.9 (Fisk and Langner, 1995). The Pensky-Martens closed cup was used.

The results for the prepolymer and the monomer are essentially the same.