ORGANOTIN OXIDE

Organotin oxides are often used as a heat stabilizer in polyvinyl chloride (PVC).
Organotin oxides are used as a catalyst in the production of polymeric materials, such as polyurethane (PU)-coated fabrics, or in plastisol prints, rubber, adhesives, etc.
Organotin oxides may also be used as biocides or preservatives in textiles, leathers and synthetic leathers like PU as well as pesticides.

ORGANOTIN OXIDES
Dibutyltin Oxide (DBTO)
CAS Number: 818-08-6
EC Number: 212-449-1
Chemical Formula: C₈H₁₈OSn
Molecular Weight: 248.94 g/mol

Tributyltin Oxide (TBTO)
CAS Number: 56-35-9
EC Number: 200-268-0
Chemical Formula: C₂₄H₅₄OSn₂
Molecular Weight: 596.11 g/mol
Product Type: Catalysts / Accelerators / Initiators > Organometallics
Chemical Composition: Organotin oxide

SYNONYMS:
Dibutyltin Oxide (DBTO); Dibutyltin oxide, Dibutyloxotin, Stannane, dibutyloxo-, Dibutyloxostannane
Tributyltin Oxide (TBTO); Bis(tributyltin) oxide, Tri-n-butyltin oxide, Bis(tri-n-butyltin) oxide, AW 75-D, Bio-Met TBTO, Biomet, Biomet 75, BTO, Butinox, C-SN-9

Organotin oxides are a solid, white catalyst that is excellent for esterification, transesterification and polycondensation reactions in the production of alkyd resins, polyester resins and oleochemical resins.

Organotin oxides act as a catalyst in powder coating polyester resins. 
Organotin oxides are a solid, white catalyst that is excellent for esterification, transesterification and polycondensation reactions in the production of alkyd resins, polyester resins and oleochemical resins.

Organotin oxides and hydroxides are common products from the hydrolysis of organotin halides.
Diorganotin oxides (R₂SnO) are polymers except when the organic substituents are very bulky.

In such cases, they may form cyclic trimers.
In the case of R = CH(SiMe₃)₂, dimers are formed with Sn₃O₃ and Sn₂O₂ rings.

Organotin oxides are a diverse class of organotin compounds characterized by tin–oxygen (Sn–O) bonds.
Organotin oxides are widely utilized in various industrial applications, including catalysis, polymer stabilization, and biocidal treatments.

Among the most studied organotin oxides are Dibutyltin oxide (DBTO) and Tributyltin oxide (TBTO), each possessing distinct properties and uses.
Organotin oxides are a subset of organotin compounds characterized by tin–oxygen (Sn–O) bonds.
These compounds, where tin atoms are bonded to both organic groups and oxygen atoms, exhibit unique structural and chemical properties.

Organotin oxides can exist as monomeric, oligomeric, or polymeric species, depending on the nature of the organic substituents and the synthesis conditions.
The versatility of organotin oxides has led to their widespread use in various industrial and chemical applications.

 
USES and APPLICATIONS of ORGANOTIN OXIDE:
Organotin oxides are used in coatings and paints.

-Uses of Organotin oxides in the Supply Chain:
Organotin oxides are often used as a heat stabilizer in polyvinyl chloride (PVC).

Organotin oxides are used as a catalyst in the production of polymeric materials, such as polyurethane (PU)-coated fabrics, or in plastisol prints, rubber, adhesives, etc.

Organotin oxides may also be used as biocides or preservatives in textiles, leathers and synthetic leathers like PU as well as pesticides.
Silicone-based finishes (e.g. for elastomeric properties and water repellency) may also contain organotins.
The most common applications of Organotin oxides in apparel and footwear supply chains are plastic trims, screen prints, and PU-coated fabrics.

-Uses and Applications of Organotin Oxides:
*Dibutyltin Oxide (DBTO):

**Catalyst in Organic Synthesis:
Organotin oxides facilitate regioselective O-alkylation, acylation, and sulfonation reactions, particularly in diols and polyols.

**Transesterification Reactions:
Organotin oxides serve as a catalyst in the production of esters.

**Polymer Industry:
Organotin oxides act as a curing catalyst for silicones and polyurethanes.

**PVC Stabilization:
Organotin oxides are used to stabilize polyvinyl chloride against thermal degradation.

*Tributyltin Oxide (TBTO):
**Biocide:
Organotin oxides are employed as a fungicide and molluscicide.

**Wood Preservative:
Organotin oxides protect wood from fungal decay and insect damage.

**Marine Antifouling Agent:
Organotin oxides have previously been used in paints to prevent biofouling on ship hulls; however, due to environmental concerns, its use has been banned in many countries.