Wuxi Zhengmao Chemical Co.,Ltd. were founded in 1970s. It is the assistant fine chemical manufacturer for petrochemical industry, is the member of national polyester production method association group and the member of "three agents" networks of Sinopec and CNPC. We are appointed as the manufacturer of "three agents". We specialize in the production of polyester catalyst, polymerization inhibitor and antioxidant. Our products include: Polyester catalyst ZM--24(catalyst S-24), Antimony oxide at polyester catalyst grade, Industrial antimony trioxide, P-hydroxyl anisole, phenothiazine, para-tert-butylcatechol (TBC), N.N-dibutyl dithiocarbamic acid copper (AI-61R ) & antioxidant ZM -405( NAUGARD445 ), etc. The antimony trioxide catalyst for polyester is a good product for introduced equipment. In 1999, we developed the Polyester catalyst ZM--24(catalyst S-24) and receive national patent. On December 8, 1999, it received the authentication of Jiangsu technical committee. Tested by Jinan chemical fiber general company & Shanghai petrochemical stock co., ltd , its technical indexes can meet the international standards and can be used as the replacer of imported products. In Sep., 2000, it was confirmed as the hi-tech product by Jiangsu technology bureau, it was rated as the item of Jiangsu Torch Program. It got the "golden cow" of " 1998-2000 Jiangsu new product". In Sep., 2001, it was rated as the item of National Torch Program. It got the golden award in international (Tianjin) invention, patent & new technology and product fair. In 2003, we developed Antioxidant ZM-405 ourselves, tested in the polyether equipment of Shanghai gaoqiao chemical company, it meets the standard of NAUGARD445. Polyester catalyst antimony oxide, P-hydroxyl anisole and phenothiazine got the golden award of 94 China patent technical fair, golden award of 97 third session China international new technical product fair and third award of Jiangsu technical advancement. Especially, ZM-24, antimony o