Chinese name:四丁基锡
Foreign name:Tetra-n-butyltin
CAS 1461-25-2
EINECS 215-960-8
Molecular formula: C16H36Sn
Molecular weight:347.167
Also known as: Tetra-n-butylstannane (Tetra-n-butylstannane), referred to as butyltin, belongs to metal organic compounds.
Colorless or slightly yellow oily liquid, insoluble in water, soluble in most organic solvents.
Main uses
(1) Used as a catalyst: tetrabutyltin is used as a catalyst for the synthesis of plasticizers, polyurethane, silicone, polyester, alkyd resin, etc.
(2) Used as plastic heat stabilizer: The main application of tetrabutyltin is used as PVC stabilizer, the principle of its action is that butyltin first ligates with the chlorine atoms on the PVC molecular chain, as it can capture the removed hydrogen chloride, it can prevent autocatalytic and replace the unstable chlorine atoms in PVC to prevent PVC degradation. Good stability of tetrabutyltin, suitable for high temperature processing; good weather resistance, suitable for outdoor products; good transparency, suitable for making transparent or bright colored products. Tetrabutyltin has good compatibility with PVC, and is used in a large number of PVC pipes in the U.S. The U.S. FDA, Western European BGA and BPF, and Japanese HPA have approved butyltin stabilizers for food packaging materials, medical plastic products and beverage bottles, etc. In PVC rigid sheet, especially transparent PVC rigid sheet, butyltin is an important heat stabilizer, which plays a good role in the thermal stability, transparency, anti-aging and prolonging the life of PVC products. From the future development, the heavy metal salt heat stabilizers toxic to humans will be restricted.
(3) for anti-fouling paint: organic tin compounds can be used in anti-fouling paint, the principle of its role for the organic tin paint and vinyl resin or chlorinated rubber, etc. to form a solid solvent, dispersed evenly in the base material, when the surface of the paint film due to molecular diffusion of the base material into the seawater, the paint inside the film will be continuous outward diffusion, supplementing the amount of surface exudation so as not to affect the smoothness, so that the hull speed running normally, reducing the friction with the water Therefore, its effective application is for underwater anti-fouling coating of ship hull.
(4) Others: The development of tetrabutyltin application field is very impressive, its application also includes for medicine, agricultural chemicals, wood preservatives, ink additives, plastic foaming agents, etc.; commonly used abroad in broad-spectrum disinfectants, etc. With the continuous research, in many areas will further expand its application.
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