Urethane foundry binders: an industrial hygiene appraisal.
Proceedings of the symposium on occupational health hazard control technology in the foundry and secondary non-ferrous smelting industries, December 10-12, 1979, Chicago, Illinois. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 81-114, 1981 Aug; :142-152
The guidance and health information provided by the Ashland Chemical Company to assist foundries with the use of urethane binders were reviewed. The topics covered included the composition and use of urethane binders, which are three part systems consisting of polyol, polymeric isocyanate, and catalysts; potential emissions and permissible exposure limits; and monitoring programs. The results of monitoring surveys carried out at eight new aluminum casting operations revealed levels of methylene-bis-phenyl-isocyanate (101688) (MDI) in the air higher than 0.02 parts per million, while the levels of methylene-bisaniline (101779) (MBA) ranged from 0.1 to foundries analyzed for MDI, only four exceeded 0.02 parts per million. MBA levels in 185 samples were in the same range as that for the aluminum casting facilities. Since the results obtained were indicative of a potential health hazard at the aluminum facilities, management was advised to apply engineering controls, curtail operations, provide respiratory protective equipment for the workers, and provide temporary control measures at the locations affected. In this manner, the potential health hazard was identified and evaluated, and suitable, effective engineering controls were applied.
NIOSH-Contract; Occupational-health; Foundry-workers; Urethanes; Occupational-hazards; Control-methods; Industrial-processes; Air-quality-control; Air-monitoring
Proceedings of the symposium on occupational health hazard control technology in the foundry and secondary non-ferrous smelting industries, December 10-12, 1979, Chicago, Illinois