チオニル-p-フェニレンジアミンによるゴムの加硫

概要

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Thionyl-p-phenylenediamine was found to vulcanize several rubbers containing unsaturated bonds. Such diene rubbers as BR, SBR and NBR, and even EPDM were easily vulcanized by heating with thionyl-<I>p</I>-phenylenediamine. This is a novel method of non-sulfur vulcanization. Thionyl-<I>p</I>-phenylenediamine was estimated to form a thiazine ring by 1, 4-cycloaddition reaction with double bond and cause a crosslinking of rubber. Carbon black stock did not form bubbles during the vulcanization and the strength of vulcanizate was much the same order of magnitude as that of usual sulfur-accelerated vulcanizate. On the other hand, sufficient vulcanizate was not obtained from pure gum stock on account of bubbling during the vulcaniza-tion. There was little difference between thionyl-p-phenylenediamine vulcanizate and sulfur-accelerated vulcanizate in their heat resistance under oven aging.
日本ゴム協会の論文