Organotin stabilizer (tin thioglycolate) can replace the unstable Cl atom on the polymer, so that the PVC resin has long-term stability and initial color retention12 . The stabilization mechanism of tin thioglycolate is that S atoms can replace unstable Cl atoms, thus inhibiting the formation of conjugated polyenes. Organotin stabilizer is one of the most commonly used stabilizers in the production process of PVC. It can play a certain role in catalysis, anti-oxidation and anti-ultraviolet, so as to improve the stability and processing performance of PVC. The main functions include the following aspects:
1. Catalysis: organic Tin stabilizers can optimize the reaction process of chlorides and synthetic oils, and promote the polymerization of PVC, thereby improving the efficiency of the polymerization chemical reaction.
2. Antioxidant effect: organotin stabilizers can play a role in PVC To a certain degree of anti-oxidation, prolong the service life of PVC.
3. Anti-ultraviolet effect: organotin stabilizers can also be used in PVC It has a certain anti-ultraviolet effect and effectively prevents PVC from degrading and aging when exposed to sunlight.
4. Heat stabilization: organotin stabilizers can also improve the Thermal stability, reducing the degradation and decomposition of PVC during processing, thereby improving the processing performance and production efficiency of PVC.
In summary, organotin stabilizers are indispensable in PVC production A stabilizer, which plays an important role in the manufacture and use of PVC.
