| Customization: | Available |
|---|---|
| CAS No.: | Xxxx |
| Formula: | Xxxxx |
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Organotin compounds for stabilising PVC have been in commercial use for over 40 years and the commercial products currently available are proven to work well in their respective applications.
Organotin stabilizers are highly effective heat stabilizers widely used in polyvinyl chloride (PVC) processing. They enhance material processing performance and product quality by inhibiting PVC decomposition and discoloration at high temperatures. Their molecular structure contains tin-sulfur or tin-oxygen bonds, which provide stabilization by scavenging HCl and replacing unstable chlorine atoms. Main products include methyltin, butyltin, and octyltin compounds, with octyltin being preferred for food packaging and medical applications due to its low toxicity.
Compared to traditional lead-based and calcium-zinc stabilizers, organotin stabilizers offer superior transparency, weather resistance, and long-term thermal stability, making them ideal for rigid transparent PVC products (e.g., construction materials, pipes, and packaging films). In recent years, stricter environmental regulations have phased out highly toxic tri-substituted organotins, shifting focus toward eco-friendly mono-/di-substituted organotins and composite formulations.
Future trends will prioritize the development of low-toxicity, high-efficiency, and biodegradable alternatives, along with optimized compounding technologies to reduce costs and meet green manufacturing demands.
| Category | Description/Parameters | Examples/Specific Information |
|---|---|---|
| Chemical Properties | Composition: Organotin compounds (Sn-S/O bonds) Mechanism: Scavenges HCl, replaces unstable Cl atoms, inhibits degradation |
- Methyltin: C2H6SnCl2 - Octyltin: C8H17Sn(SCH2COOR)2 - Thiol-butyltin: (C4H9)Sn(SCH2CH2S)2 |
| Physical Properties | Form: Liquid (methyltin) or powder Density: 1.1-1.3 g/cm³ Melting Point: <100°C (solid) Solubility: Soluble in esters, ketones |
Thermal Stability: 180-200°C (long-term) Boiling Point: 150-300°C (liquid) |
| Appearance & Sensory | Color: Colorless/pale yellow (pure) → amber (compound) Odor: Slight irritant (methyltin) or sulfide-like (thiol-based) |
- Transparent liquid (methyltin) - Light-yellow powder (compounded) |
| Applications | Rigid PVC: Construction materials, pipes, transparent packaging Flexible PVC: Cables, synthetic leather Special Uses: Food packaging, medical materials |
- Food-grade octyltin (FDA/EU compliant) - High-weathering thiol-tin (outdoor films) |
| Eco-Safety | Toxicity: Tri-substituted organotins (banned) → mono-/di-substituted (low toxicity) Regulations: REACH, RoHS, ISO-certified |
- Octyltin: Low migration, suitable for food contact |
| Typical Products | Methyltin: High transparency Octyltin: Low toxicity, migration resistance Thiol-butyltin: Initial color control |
- Applications: Mineral water bottles (methyltin) - Medical catheters (octyltin) - Cable sheaths (thiol-butyltin) |
| Trends | Eco-Alternatives: Ca/Zn + organotin blends High Performance: Nanotech reduces dosage (1-2 phr) Smart Formulations: Synergy with antioxidants/UV stabilizers |
- Goals: Biodegradability, cost reduction, green manufacturing |
Notes:
phr: Parts per hundred resin.
Specific parameters (e.g., viscosity, pH) require product-specific technical documentation.
| Sector | Specific Applications | Applicable Product Types |
|---|---|---|
| Construction | Window/door profiles, PVC panels, pipes (drainage/water supply), roofing membranes | Methyltin, thiol-butyltin (high transparency, weather resistance) |
| Packaging | Food-grade transparent bottles (water, oil), pharmaceutical films, shrink films | Octyltin (low toxicity, FDA/EU-certified) |
| Electronics | Cable sheaths, plug casings, insulation materials | Butyltin (heat/flammability resistance) |
| Automotive | Dashboard surfaces, seals, soft PVC interiors | Composite organotins (aging/oil resistance) |
| Medical | Disposable infusion tubes, blood bags, catheters | High-purity octyltin (biocompatibility) |
| Outdoor Products | Advertising films, pool liners, outdoor furniture coatings | Thiol-tin (UV resistance, anti-yellowing) |
| Step | Key Operations | Technical Parameters |
|---|---|---|
| Direct Addition | Mixed with PVC resin powder; dosage: 1-3 phr (parts per hundred resin) | - Rigid PVC: 1-1.5 phr - Flexible PVC: 0.5-1 phr |
| Compounding | Synergized with plasticizers (e.g., DOP), lubricants, and antioxidants | Ratios adjusted based on product requirements |
| Processing | Compatible with extrusion, injection molding, and calendaring (160-200°C) | Temperature control critical to avoid degradation |
| Post-Treatment | Surface coatings (e.g., UV-resistant layers) for enhanced weather resistance | Improved performance with UV stabilizers |
| Advantage | Key Features | vs. Traditional Stabilizers |
|---|---|---|
| Thermal Stability | Inhibits PVC decomposition up to >200°C, extending processing windows | Superior to lead-based (toxic) and Ca/Zn (low efficiency) |
| Transparency | Maintains optical clarity for high-transparency applications (e.g., water bottles) | Lead/Ca/Zn stabilizers increase haze |
| Low Toxicity | Mono-/di-substituted organotins comply with FDA/EU 10/2011 for food/medical use | Replaces toxic tri-substituted organotins and lead salts |
| Weather Resistance | Thiol-based organotins resist UV/yellowing, improving outdoor lifespan by 30-50% | Ca/Zn stabilizers degrade outdoors |
| Compatibility | Excellent synergy with PVC resins, plasticizers, and flame retardants | Metal soaps may precipitate |
| Trend | Technology Pathways | Market Drivers |
|---|---|---|
| Eco-Friendly Alternatives | - Lead/tin-free stabilizers (e.g., bio-based) - Ca/Zn + organotin blends for cost-performance balance |
Global lead bans (RoHS, CPSC) |
| High Efficiency | - Nanotech enhances dispersion, reducing dosage to 0.8-1.2 phr - Molecular design improves thermal stability |
Cost reduction and green manufacturing demands |
| Smart Functionality | - Self-healing stabilizers (extended lifespan) - Light/heat dual-responsive stabilizers |
Demand for smart packaging/automotive parts |
| Circular Economy | - Recyclable PVC formulations (multi-process tolerance) - Biodegradable organotins (reduced environmental impact) |
EU plastics strategy, carbon neutrality goals |
Organotin stabilizers dominate high-end PVC markets due to their unmatched efficiency and transparency. Future priorities include:
Regulatory Compliance: Phasing out toxic variants, promoting low-migration/biodegradable formulas.
Tech Innovation: Enhancing performance via nanotech and smart molecular design.
Market Expansion: Penetrating emerging sectors like (battery separators) and biomedicine.
1.Q:How's the quality?
A:We are the source factory, quality is guaranteed.
2.Q:When does it ship?
A:We have standardized processes to ship as fast as possible.
3.Q:How do you protect the after-sales?
A:We keep samples of each batch and support returns and technical traceability in case of quality problems.
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