Organotin stabilizer (tin thioglycolate) can replace the unstable Cl atoms 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: Organotin 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. Anti-oxidation effect: Organotin stabilizer can play a certain anti-oxidation effect in PVC and prolong the service life of PVC.
3. Anti-ultraviolet effect: organotin stabilizer can also play a certain anti-ultraviolet effect in PVC, effectively preventing PVC from degrading and aging when exposed to sunlight .
4. Thermal stabilization: Organotin stabilizers can also improve the thermal stability of PVC, reduce the degradation and decomposition of PVC during processing, thereby improving the processing of PVC performance and productivity.
In summary, organotin stabilizer is an indispensable stabilizer in PVC production and plays an important role in the manufacture and use of PVC.
