The evaluation of employee exposure to isocyanates during a painting/sealing process at an airline maintenance facility

Abstract

Exposure levels to methylene biphenyl isocyanate (MDI) and toluene diisocyanate (TDI) were quantified using industrial hygiene monitoring for two groups of aircraft maintenance employees. Results indicated levels between 0.18 and 0.24 parts per billion (ppb) for one group and were not detectable for the other group. Literature review highlighted past studies showing negative health affects, including occupational asthma and several other respiratory system problems in hypersensitive individuals working in various industries.