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Highly efficient organotin catalyst for polyurethane foam and silicone curing systems.
Excellent hydrolytic stability under ambient storage conditions.
Low volatility and favorable handling characteristics compared to lower-molecular-weight tin catalysts.
Consistent catalytic activity across a broad temperature range (20–120 °C).
Compatible with common foam stabilizers, surfactants, and blowing agents.
Catalyst in flexible and rigid polyurethane foam manufacturing.
Crosslinking accelerator in condensation-cure silicone elastomers (RTV-2).
Reaction promoter in polyester and alkyd resin synthesis.
Stabilizer and co-catalyst in PVC heat stabilization formulations.
Accelerator in moisture-cure sealants and adhesives based on silane-terminated polymers.
| Chemical Type | Dialkyltin diester (organotin compound) |
| Product Form | Clear, pale yellow to amber viscous liquid |
| Appearance | Homogeneous, free from visible particulates or phase separation |
| Melting Point | Approx. 25–30 °C (may solidify at low ambient temperatures; gentle warming restores fluidity) |
| Primary Applications | Polyurethane foams, RTV silicones, moisture-cure sealants |
| Key Features | Non-volatile, thermally stable, low odor |
| Benefits | Enables precise reaction control, reduces post-cure emissions, improves cell structure uniformity |
| Regulatory Compliance | REACH registered; not classified as CMR under CLP Regulation (as of current ECHA dossier) |
| Common Compatible Systems | Suitability |
| Polyether-based flexible PU foams | Highly Recommended – Delivers rapid cream-to-gel transition with fine cell morphology |
| Condensation-cure RTV-2 silicones (e.g., acetoxy, oxime types) | Highly Recommended – Provides reliable cure speed without premature skinning |
| Silane-terminated polymer (STP) sealants | Recommended – Effective at 0.05–0.3 phr; synergistic with titanium chelates |
| PVC thermal stabilizer blends (with Ca/Zn soaps) | Suitable – Acts as secondary stabilizer; limited use due to regulatory constraints in food-contact applications |
Q1: What is the CAS Number for Dioctyltin Dilaurate?
A: The CAS Registry Number is 301-10-0.
Q2: What is the typical dosage range in polyurethane foam formulations?
A: Standard usage is 0.05–0.3 parts per hundred parts polyol (phr), depending on desired reactivity, density, and processing conditions.
Q3: How does Dioctyltin Dilaurate compare to Dibutyltin Dilaurate (DBTDL)?
A: DOTL offers lower volatility, reduced dermal absorption potential, and improved thermal stability versus DBTDL—making it preferred for high-temperature processing and applications requiring longer pot life.
Q4: Is Dioctyltin Dilaurate approved for food-contact or medical applications?
A: It is not authorized under FDA 21 CFR or EU Framework Regulation (EC) No. 1935/2004 for direct food-contact applications. Its use is restricted to industrial intermediates and non-leaching end-products where migration risk is negligible.
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E-mail: wangxingqiang@ericwchem.com
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