give up their sulfur to the rubber. The formation of thiozonides is illustrated by the following equation: 2R-NH2 + 4S -> R-NH-S-S-S-NH-R + H2S By this scheme, the true accelerator is produced together with hydrogen sulfide by the reaction of the amine and sulfur. Such an explanation necessarily

A by-product, formerly a nuisance, costing money t o get rid of it, has been converted into a useful material possessing a commercial value.

No abstract

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