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Report of survey: airborne diisocyanate during spray application of polyurethane foam, Mathies Mine, Finleyville, Pennsylvania.

Ayer-HE; FitzPatrick-MS; Scheel-LD
Cincinnati, OH: U.S. Department of Health, Education and Welfare, Public Health Service, Division of Occupational Health, 1963 Mar; :1-13
Representatives of the Division of Occupational Health and the U. S. Bureau of Mines collected air samples for diphenyl methane diisocyanate during spraying of polyurethane foam on air stoppages at the Mathies Mines, Mathies Coal Company, Finleyville, Pennsylvania. Twenty-eight samples, covering 73 minutes of operation, were taken and analyzed. Concentrations as high as 5 milligrams per cubic meter (equivalent to 0.5 parts per million in the vapor state) were determined near the spraying. It was found that most of this contamination (over 95% of the high samples) was particulate material larger than a nominal 12 microns diameter. No vapor concentrations greater than 0.02 parts per million were found. Fifty feet or more from the operation total concentrations greater than 0.4 milligrams per cubic meter (0.04 parts per million) were not observed. It is recommended that during all spraying: 1. All personnel within 50 feet of the spraying operation wear Bureau of Mines approved organic vapor respirators with particulate prefilters. 2 Work be scheduled or arranged so as to minimize the exposure time of personnel downwind. All unnecessary exposures to spray and vapor should be avoided. 3. Skin contact with the unmixed components be avoided.
Mining-industry; Isocyanates; Respirators; Respiratory-protective-equipment; Personal-protective-equipment; Personal-protection; Organic-vapors; Particulates
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Report of Survey: Airborne Diisocyanate During Spray Application of Polyurethane Foam, Mathies Mine, Finleyville, Pennsylvania
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division