rubber accelerator tbbs(ns) chemical name: n-tertbuty1-2-benzothiazole sulfenamide synonyms: ns, tbbs, vulkacit n2, accicure bsb molecular formula: c11h14n2s2 molecular weight: 238 apperance milky white or yellowish brown granular, powder melting point c min 106.0 heating loss % max 0.40 ash content % max 0.40 free amine % max 0.50 insoluble in methanol 0.50 application: tbbs is a vulcanized accclerator with delayed action, short cure time, has high anti-scorching quality, processing safety. widly used in all sorts of rubber products and tires, especially the meridian tires. the product is an excellent delayed accelerator with more delayed action and great curing rate and other advantage.