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Highly efficient catalyst for polyurethane (PU) elastomer and microcellular foam production.
Excellent hydrolytic stability due to branched neodecanoate ligands, minimizing premature decomposition.
Low volatility and reduced odor profile compared to traditional tin carboxylates.
Precise reactivity control enables consistent processing window in reactive molding applications.
Compatible with both aromatic and aliphatic isocyanate systems without significant side reactions.
Microcellular polyurethane shoe soles and gaskets requiring fine cell structure and resilience.
Casting elastomers for industrial rollers, seals, and wear-resistant parts.
Reaction injection molding (RIM) of automotive interior components.
Two-component PU adhesives and sealants demanding extended pot life and rapid demold strength.
Thermoplastic polyurethane (TPU) pre-polymer synthesis where controlled chain extension is critical.
| Chemical Type | Organotin catalyst (dialkyltin di(carboxylate)) |
| Product Form | Clear, pale yellow to amber viscous liquid |
| Appearance | Homogeneous liquid, free from visible particulates or phase separation |
| Melting Point | –15 °C to –5 °C (approx.) |
| Primary Applications | Polyurethane elastomers, microcellular foams, RIM systems |
| Key Features | High catalytic selectivity for urethane formation over urea; low volatility |
| Benefits | Improved green strength development, reduced post-cure time, enhanced surface finish |
| Regulatory Compliance | REACH registered; compliant with EU Directive 2009/48/EC (Toy Safety) for migration limits when used as intended |
| Common Compatible Systems | Suitability |
| Polyether-based PU elastomer systems | Highly Recommended – Delivers optimal cure balance and mechanical property development |
| Polyester-based PU casting systems | Recommended – Effective with minor formulation adjustments for viscosity and reactivity |
| Aromatic MDI prepolymers | Highly Recommended – Excellent compatibility and no adverse discoloration |
| Aliphatic HDI-based systems | Suitable – Requires dosage optimization to maintain light stability and gel time |
Q1: What is the CAS Number for Dimethyltin Dineodecanoate?
A: The CAS Registry Number is 301-96-6.
Q2: What is the typical recommended dosage range in PU elastomer formulations?
A: Standard dosage ranges from 0.05 to 0.3 phr (parts per hundred resin), depending on system reactivity, desired demold time, and final physical properties.
Q3: How does Dimethyltin Dineodecanoate compare to Dibutyltin Dilaurate (DBTDL) in terms of regulatory acceptance and performance?
A: Dimethyltin Dineodecanoate offers lower volatility and improved hydrolytic stability versus DBTDL, and is accepted under stricter regulatory frameworks (e.g., EU Toy Safety Directive) due to its lower potential for tin migration from finished articles.
Q4: Is extraction or migration of tin a concern in food-contact or medical-grade PU applications?
A: When fully cured and post-cured per specification, migration remains below EU Commission Regulation (EU) No 10/2011 and US FDA 21 CFR §177.1680 limits; however, it is not approved for direct food-contact use without full application-specific validation.
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E-mail: wangxingqiang@ericwchem.com
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