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Shanghai Zhiqiang Plastic Additives Co., Ltd., formerly known as Shanghai Dongbin Chemical Plant, is a company specializing in the development and production of heat stabilizers for PVC processing. It is an ISO9001:2000 quality management system certified enterprise.

With over a decade of experience in the research, development, and production of plastic additives, the company offers products such as antimony mercaptide composite heat stabilizers, CT-50 series composite heat stabilizers, CS-80 composite heat stabilizers, methyltin mercaptide heat stabilizers, T-580 organotin heat stabilizers, non-toxic phosphites, and plasticizers.