Airborne methylene diphenyl diisocyanate (MDI) concentrations associated with the application of polyurethane spray foam in residential construction.
The primary objectives of this study were (a) to measure potential exposures of applicators and assistants to airborne methylene diphenyl diisocyanate (MDI), (b) to measure airborne concentrations of MDI at various distances from the spray foam application, and (c) to measure airborne MDI concentrat...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 4; no. 2; pp. 145 - 156 |
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| Autores principales: | , , , |
| Formato: | CEU exam questions research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Feb2007
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106145830&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106145830 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Feb2007 vid: 4 iid: 2 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 106145830 106145830 2009650996 10.1080/15459620601133779 NLM17249149 106145830 ppf: 145 ppct: 11 formats: fmt: @attributes: type: P tig: atl: Airborne methylene diphenyl diisocyanate (MDI) concentrations associated with the application of polyurethane spray foam in residential construction. aug: au: Lesage J Stanley J Karoly WJ Lichtenberg FW affil: Institut de recherche Robert-Sauvé en santé et en sécurité du travail, 505 West De Maisonneuve Blvd., Montreal, Quebec H3A 3C2, Canada; lesage.jacques@irsst.qc.ca sug: subj: Air Pollutants, Occupational Analysis Chlorofluorocarbons Analysis Occupational Exposure Analysis Organic Chemicals Analysis Polyurethanes Air Pollutants, Occupational Standards Canada Chlorofluorocarbons Standards Education, Continuing (Credit) Facility Design and Construction Housing Occupational Exposure Organic Chemicals Standards Particle Size United States Human ab: The primary objectives of this study were (a) to measure potential exposures of applicators and assistants to airborne methylene diphenyl diisocyanate (MDI), (b) to measure airborne concentrations of MDI at various distances from the spray foam application, and (c) to measure airborne MDI concentrations as a function of time elapsed since application. Other study objectives were, (a) to compare the results from filter and impinger samples; (b) to determine the particle size distribution in the spray foam aerosol; (c) to determine potential exposures to dichlorofluoroethane; and (d) to measure any off-gassing of MDI after the foam had fully cured. This study was conducted during application of spray polyurethane foam inside five single-family homes under construction in the United States and Canada.Spray foam applicators and assistants may be exposed to airborne MDI concentrations above the OSHA permissible exposure limit. At these concentrations, OSHA recommends appropriate respiratory protection during spray foam application to prevent airborne MDI exposures above established limits and to protect against exposure to dichlorofluoroethane (HCFC-141b). Airborne MDI concentrations decrease rapidly after foam application ceases. The highest airborne concentrations measured after 15 min and 45 min were 0.019 mg/m3 and 0.003 mg/m3, respectively. After 45 min, airborne concentrations were below the limit of quantitation (LOQ) of 0.036-microg per sample. For samples taken 24 hours after completion of foaming, results were also below the LOQ. Approximately two-thirds of the total mass of the airborne particles in the spray foam aerosol was greater than 3.5 microns in diameter. Airborne MDI concentrations determined by filter sampling methods were 6% to 40% lower than those determined by impinger methods. pubtype: Academic Journal doctype: CEU exam questions research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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