| abstract |
The invention belongs to the field of chemical industry and particularly relates to a composite stabilizer for polyvinyl chloride (PVC) processing. The composite stabilizer consists of the following components in part by weight: 55 to 105 parts of main stabilizer, 0.255 to 11 parts of auxiliary stabilizer, and 10 to 35 parts of inorganic filler. The main stabilizer is a 3-dodecylthiopropionic acid metal soap stabilizer, and the chemical formula of the metal soap stabilizer is [CH3(CH2)11S(CH2)2COO]mXn, wherein X is one or more of calcium ion, zinc ion, barium ion or magnesium ion; and the metal soap stabilizer consists of 5 to 20 weight parts of metal ion and 50 to 85 parts of sulfur-containing carboxylate group. The composite stabilizer has the advantages of high thermal stability, safety and no toxicity, certain processability and lubricity and low cost. |