n [4,4’-oxybis(benzenesulfonylhydrazide), OBSH] A blowing agent, a white crystalline solid that melts and begins to decompose near 105°C. It produces a white unicellular foam when incorporated in PVC plastisol but has a strong residual odor that does not evolve when it is used in rubbers. It is also used in epoxy and phenolic foams and serves as a cross-linking agent in rubber compositions and a rubber/resin blends. 
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Gooch, J.W. (2011). Benzenesulfonylhydrazide. In: Gooch, J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6247-8_1209
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DOI: https://doi.org/10.1007/978-1-4419-6247-8_1209
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