Tar-based products

Tar-based products are used in conjunction with polymers in the manufacture of polymer-reinforced membranes which are biostable and moisture impermeable. In this combination, polymer (polyurethane or some styrene-containing block copolymers) offers reinforcing network but it is also plasticized to produce elastomeric materials having excellent 

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Previously, the only information on biological indicators of exposure to coal tar found in the available literature involved a study of 1-hydroxypyrene in the urine of a creosote wood-treatment plant worker (Jongeneelen et al. 1985). The pyrene metabolite, 1 -hydroxypyrcnc, is now more commonly used as a biological indicator to assess total PAH exposure in several industries as well as for nonoccupational uses of coal-tar based products (Malkin et al. 1996 Strickland et al. 1996). Elovaara et al. (1995) studied inhalation and dermal exposure to naphthalene and 10 large PAHs in creosote impregnation plant workers. Air concentrations of the compounds were measured and compared with measurements of... 

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