HSL/2005/59
HSL/2005/59: Measurement of Airborne Isocyanate During Sanding and Bake Cycle - Results - December 2004 and March 2005 is part of the Occupational Health & Safety Information Service's online subscription. Bringing you a comprehensive selection of legislation, regulations, guidance, standards, including BSI and best practice which is
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Publication Date:
January 2005
ISBN:
Abstract:
In the motor vehicle repair industry (MVR) after a car or car-part has been sprayed it is often placed in a booth at elevated temperature to speed curing of the isocyanate. This is known as baking or the bake-cycle. During the bake-cycle the air to the booth is usually re-circulated which could increase airborne isocyanate concentrations inside the booth and associated ductwork. This could lead to NCO exposure if an unprotected worker entered the booth during the bake-cycle or if the booth leaked or was not cleared of residual vapour at the end of the cycle.
Similarly sanding (flatting) of car-parts painted with NCO containing materials could also be a source of exposure. Sanding is most usually done on primer paints but sometimes a finished car-part may need to be sanded back to the bare metal (i.e. topcoat, colour-cot and primer layers removed) if the spray job has not been successful.
This report evaluates the risks from these processes.
Explanatory Note:
Publisher:
Health & Safety Laboratories
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