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Testing of glove efficacy against sprayed isocyanate coatings utilizing a reciprocating permeation panel.

Authors
Ceballos-DM; Sasakura-M; Reeb-Whitaker-C; Broadwater-K; Milbauer-M; Crampton-R; Dills-R; Yost-MG
Source
Ann Occup Hyg 2014 Jan; 58(1):50-59
NIOSHTIC No.
20043762
Abstract
Objectives: Modify a permeation panel to evaluate dermal protective clothing for resistance to sprayed coatings with minimal variability in spray paint loading across the test panel. Determine isocyanate protection effectiveness of natural rubber latex (5 mil or 0.13mm), nitrile rubber (5 mil or 0.13mm), and butyl rubber (13 mil or 0.33mm) glove materials against a commonly used automotive clear coat formulation. The latex and nitrile gloves were the type used by the local autobody spray painters. Methods: Glove materials were tested by spraying paint onto an automated reciprocating permeation panel (permeation panel II). Temperature, relative humidity, and spray conditions were controlled to optimize paint loading homogeneity as evaluated by gravimetric analysis. Isocyanate permeation was measured using 1-(2-pyridyl)-piperazine-coated fiber-glass filters analyzed by a modified version of the OSHA 42/PV2034 methods. Results: Latex exhibited a higher permeation rate compared with nitrile for isocyanates (1,6-hexamethylene diisocyanate (HDI) and isophorone diisocyanate monomers) and both materials presented permeation at all of the time points suggesting a fast isocyanate breakthrough. Butyl material exhibited no permeation or breakthrough for isocyanates under the tested conditions. The spray application at 69+/-8 degrees F was optimally homogeneous at 45+/-0.5mg weight of dry clear coat per 5cm2. Conclusions: The permeation panel II is a reliable method to assess dermal protective clothing performance against polymerizing coatings. Commonly used 5-mil (0.13-mm) latex and nitrile gloves were determined to be ineffective barriers against the isocyanates found in a commonly used clear-coat formulation while butyl gloves were protective.
Keywords
Paints; Gloves; Isocyanates; Sensitization; Irritants; Bronchial-asthma; Skin; Exposure-levels; Risk-factors; Respiratory-system-disorders; Respiratory-irritants; Spray-painting; Monomers; Protective-clothing; Personal-protection; Personal-protective-equipment; Author Keywords: automotive clear coats; butyl rubber; isocyanates; natural rubber latex; nitrile rubber; permeation; gloves
Contact
Diana M. Ceballos, Department of Environmental and Occupational Health Sciences, University of Washington, Box 357234, Seattle, WA 98195-7234
CODEN
AOHYA3
Publication Date
20140101
Document Type
Journal Article
Email Address
dceballos@cdc.gov
Funding Type
Grant
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-009364; M022014
Issue of Publication
1
ISSN
0003-4878
Source Name
Annals of Occupational Hygiene
State
WA; OH
Performing Organization
University of Washington
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