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The reaction of rubber with sulfur proceeds at a low rate even at high temperatures. A natural rubber mixture containing only sulfur requires about 4 hours of vulcanization at 140 to fully cross-link. For this reason, attempts have been made over the years to accelerate vulcanization.
Over the years and many studies, rubber mixture technologists now have a wide range of accelerators that can be used in mixtures.
In order to organize this large group, they were arranged into classes according to general chemical names, divided into:
Sulfenamides (CBS, TBBS, MBS)
Thiazoles (MBT, ZMBT, MBTS)
Guanidines (DPG, DOTG)
Tiurams (TMTD, TETD, TMTM)
Diticabamates (ZDMC, ZDEC)
Dithiophosphates (ZBPD)