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First Rubber MBTS(DM) is a general-purpose thiazole accelerator, chemically known as dibenzothiazole disulfide or 2,2'-dithiobis(benzothiazole). It provides a medium-fast cure rate with excellent processing safety and non-staining characteristics. MBTS is compatible with natural rubber (NR) and most synthetic rubbers including SBR, BR, NBR, and EPDM. It can be used alone or synergistically with aldehyde amines, thiurams, dithiocarbamates, and guanidines to increase cure rates. It also functions as a retarder and plasticizer in polychloroprene (CR) compounds. Recommended dosage: 0.5-2.0 phr.

First Rubber MBT-75 is a pre-dispersed thiazole accelerator masterbatch with 75% 2-mercaptobenzothiazole active content. It provides very fast cure speed and a low vulcanization temperature of approximately 125°C, making it ideal for efficient, high-productivity rubber processing. Compatible with NR, SBR, NBR, EPDM, and CR. Non-staining and non-discoloring. Can be used alone or synergistically with secondary accelerators (guanidines, thiurams, dithiocarbamates). Also acts as a retarder in sulfur-free CR compounds. Dosage: as primary 0.5-3.0 phr; as secondary 0.2-0.8 phr.

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