Organotin stabilizers mainly include the following types:

Aliphatic acid salts: such as dibutyltin dilaurate, dioctyltin dilaurate, etc. The tin atoms in this type of stabilizer can coordinate with the chlorine atoms on the PVC molecular chain, inhibit the reaction of removing HCl through replacement reaction, and thus play a stabilizing role.

Maleates: such as dibutyltin maleate, dibutyltin bis(monobutyl maleate), dioctyltin maleate, etc. This type of stabilizer can undergo diene addition reaction with conjugated double bonds to inhibit the formation of polyolefin structure.

Mercaptolates: such as bis(isooctyl mercaptan) tin n-octanoate, di-n-octyltin bis(isobutyl mercaptoacetate), di-n-octyltin bis(isooctyl mercaptoacetate), etc. The mercaptan tin in this type of stabilizer has excellent thermal stability and is used in large quantities. Among them, bis(isooctyl mercaptan) tin n-octanoate is recognized as a non-toxic stabilizer. However, it should be noted that the self-lubricating property of sulfur-containing organotin stabilizers is poor, so appropriate lubricants are usually required in practical applications.

In addition, organotin stabilizers can also be divided into mono-, di- and ternary organotin compounds according to their chemical structure. These compounds are widely used in the processing and production of PVC, plastics, rubber, inks, asphalt, adhesives, and polymer materials such as PE, PP, ABS, PC, PA, and PBT.

The main differences between various types of organotin stabilizers lie in their chemical structure, mechanism of action, and application areas. They each have their own characteristics. For example, thiolate stabilizers have the best stabilizing effect, while aliphatic acid salts and maleate stabilizers achieve stabilization effects through different reaction mechanisms. In addition, different organotin stabilizers may also differ in cost, toxicity, and compatibility with other stabilizers.

In general, the selection of suitable organotin stabilizers requires consideration of specific application scenarios, material requirements, and cost factors. In practical applications, selection and adjustment are required according to specific circumstances to achieve the best stabilizing effect.