Occupational Asthma Reference
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Huynh CK, VuDuc T, Savolainen H,
Occupational asthma due to isocyanates: current research orientation in occupational hygiene [French],
Soz Praventivmed,
1993;38 Suppl 2:S128-S130,
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Keywords: oa, isocyanate, HDI, prepolymer, am, control
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Abstract
The replacement of the HDI monomer by less volatile prepolymers is not accompanied by a decrease of the incidence of occupational asthma in Switzerland. Field measurements show that the prepolymer concentration levels may be high although the monomer is hardly detectable or complies with the norm. Our researches are focused on the improvement of generation and measurement techniques (international quality control), on the characterization of the prepolymers to study their transformation in biological media. Field surveys will be conducted to establish the prepolymer concentration profiles. We recommend for the introduction in Switzerland of threshold limit values for HDI-biuret and isocyanurate
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