The replacement of sulfur donors The commonly used dithiodimorpholine (DTDM) and N-oxydiethylenethiocarbamoyl-N'-oxydiethylenesulfenamide (OTOS) are A secondary amine based sulphur donor crosslink system. They are usually used in semi-vulcanized systems with a small amount of sulfur, because the sulfur-donating cross-linking system has the advantages of good sulfur-return characteristics and oxygen resistance. Therefore alternatives must be chosen for their characteristics.
It is generally possible to use a primary amine-containing vulcanization accelerator, a high-promoting low-sulfur semi-effective vulcanization system and a promoter ZBTP. Promising alternatives are hexamethylene-bis-thiosulfate (HTS) or 1,3-bis(citrymethyl)methoxybenzene (BCl) which improve the sulfur and fatigue properties.