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- W2492422905 abstract "The occurrence of carcinogenic nitrosamines at workplaces in the rubber and tire industry is still an unsolved problem. Recent air measurements in Germany (1988-1991) showed nitrosamine concentrations up to 41 µg/m3. New regulations require levels not greater than 2.5 µg/m3. The major source of nitrosamines is the use of certain vulcanization accelerators such as thiurams, dithiocarbamates and sulfanamides. These accelerators are nitrosated during the vulcanization process. The origin of the nitrosating agent are oxides of nitrogen adsorbed on the large surface of inorganic rubber additives, e.g., zinc oxide and carbon black. We investigated two different approaches to prevent the formation of carcinogenic nitrosamines: (1) The nitrosating potential within a rubber mixture can be eliminated or at least drastically reduced by the addition of scavengers, like primary amines, urea or sulfamic acid. (2) Following the concept of safe amines, the amine moiety of the accelerators does not form carcinogenic nitrosamines, a number of new accelerators with good technical properties was synthesized. Both preventive measures can be used effectively to improve workplace hygiene." @default.
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- W2492422905 date "1994-03-28" @default.
- W2492422905 modified "2023-10-14" @default.
- W2492422905 title "Prevention of Nitrosamine Exposure in the Rubber Industry" @default.
- W2492422905 doi "https://doi.org/10.1021/bk-1994-0553.ch004" @default.
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