Abstract
Experimental work has been carried out on three aspects of handling toluene diisocyanate (TDI): (i) The quantities of TDI emitted from polyurethane foam plants are low: of the order of 0·005% of the TDI fed to the process is subsequently discharged to the atmosphere. The destruction of this TDI by chemical reactions in the atmosphere it still under examination. All results so far indicate that no toluene diamines are formed. (ii) Trials with an activated carbon scrubber installed on the vent line of a foam plant indicate that substantial amounts of TDI can be removed from the discharged air. More work is needed before an economic assessment of the process can be made. (iii) Field trials on fire fighting techniques for TDI spillages show that proteinic type fire fighting foams give the best suppression of TDI vapours.
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