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Rubber Industry Product Improvement

Sodium nitrite is used to improve the quality of produced rubber.   Accelerators, retarders, antioxidants and antiozonants are the types of compounds made using sodium nitrite.  Accelerators, eg, thiuram, greatly increase the rate of vulcanization and lead to marked improvement in the rubber quality.  Retarders, on the other hand, eg N-nitrosodiphenylamine, delay, the onset of vulcanization  but do not inhibit the subsequent process rate.  Antioxidants and antiozonants, sometimes referred to as antidegradants, serve to slow the rate of oxidation by acting as chain stoppers, transfer agents, and peroxide decomposers.  A commonly used antioxidant is N, N’- disubstituted p-phenylene diamine which can employ sodium nitrite in its manufacture.  Applied in such a specific manner sodium nitrite can limit rubber degradation and improve elasticity and strength in rubber.

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