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High catalytic efficiency in esterification and transesterification reactions at low addition levels (typically 0.05–0.2 wt%).
Excellent thermal stability up to 200 °C, enabling use in high-temperature polyurethane and silicone curing processes.
Good solubility in common organic solvents including xylene, toluene, MEK, and dibutyl phthalate.
Low volatility compared to monobutyltin derivatives, supporting safer handling and reduced process emissions.
Consistent reactivity profile across batch production, ensuring reproducible catalyst performance in industrial formulations.
Catalyst for moisture-curing polyurethane sealants and adhesives.
Accelerator in RTV-2 (room-temperature vulcanizing) silicone rubber systems.
Promoter in polyester resin synthesis and alkyd paint binder production.
Stabilizer and co-catalyst in PVC heat stabilization formulations (used at sub-ppm levels with synergists).
Reaction modifier in polycondensation processes for specialty polyesters and polycarbonates.
| Chemical Type | Organotin compound – dialkyltin diacetate |
| Product Form | Clear, colorless to pale yellow liquid |
| Appearance | Homogeneous liquid, free from visible particulates or phase separation |
| Melting Point | −15 °C to −10 °C (approx.) |
| Boiling Point | Decomposes above 220 °C; no sharp boiling point observed |
| Primary Applications | Polyurethane & silicone curing catalyst, polyester synthesis accelerator |
| Key Features | Low odor, hydrolytically stable under anhydrous conditions, non-volatile residue |
| Regulatory Compliance | REACH registered; not classified as CMR under CLP Regulation (as of latest ECHA dossier) |
| Common Compatible Systems | Suitability |
| Aliphatic polyurethane prepolymers (NCO-terminated) | Highly Recommended – Delivers rapid gel time control and full cure without amine blush |
| Condensation-cure RTV silicones (acetoxy-type) | Highly Recommended – Provides consistent tack-free time and deep-section cure |
| Unsaturated polyester resins (UPR) | Recommended – Effective at 0.01–0.05% loading; requires compatibility testing with peroxides |
| PVC plastisols with Ca/Zn stabilizers | Suitable – Acts as secondary heat stabilizer; limited use due to regulatory constraints in food-contact applications |
Q1: What is the CAS Number for Dibutyltin Diacetate?
A: The CAS Registry Number is 1067-33-0.
Q2: What is the typical dosage range in silicone sealants?
A: Standard loading is 0.1–0.5 parts per hundred parts resin (phr), adjusted based on desired skin-over time and ambient humidity.
Q3: How does Dibutyltin Diacetate compare to Dibutyltin Dilaurate (DBTDL)?
A: DBTDA offers higher hydrolytic sensitivity and faster initial reactivity in acetoxy silicones, while DBTDL provides better shelf-life stability in neutral systems; DBTDA is preferred where rapid surface cure is critical.
Q4: Is Dibutyltin Diacetate compliant with EU food contact regulations?
A: No — it is not authorized under EU Regulation (EC) No 10/2011 for food-contact plastics or coatings due to tin migration concerns; alternative catalysts must be used for such applications.
Q5: Does Dibutyltin Diacetate leach or migrate in cured polymer matrices?
A: Yes — organotin compounds may migrate under prolonged exposure to heat, humidity, or polar solvents; migration potential is higher than in covalently bound tin stabilizers and must be assessed per application-specific extractables testing.
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