Stair Chemical Technology Co., Ltd., founded in 2004, is a national‑level single‑champion and high‑tech manufacturer specialized in rubber additives and fine‑chemical materials . Our factory is located in Caoxian Chemical Industrial Park, Shandong Province, with large‑scale production workshops and complete quality‑control laboratories. We mainly produce antioxidant TMQ and accelerator series products as CBS, which are widely applied in tyre and rubber‑making industries. The company has passed ISO international management system certifications, with independent R&D capabilities .