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High-purity, surface-treated aluminum hydroxide offering excellent flame retardancy and smoke suppression.
Optimized particle size distribution for enhanced dispersion in polymer matrices and improved mechanical properties.
Low abrasivity minimizes wear on processing equipment during compounding and extrusion.
Thermally stable up to ~200 °C, enabling compatibility with common thermoplastics including polyolefins and engineering resins.
Halogen-free formulation supports compliance with RoHS, REACH, and other global environmental regulations.
Flame-retarded polypropylene (PP) for automotive interior components.
Low-smoke cables and wire & cable insulation materials.
Fire-safe building and construction materials, including PVC-based flooring and wall coverings.
Electrical enclosures and housings requiring UL 94 V-0 or V-1 rated performance.
Thermoplastic elastomers (TPEs) used in consumer electronics and appliance housings.
| Chemical Type | Aluminum hydroxide, Al(OH)₃ |
| Product Form | Free-flowing white powder |
| Appearance | White, odorless, non-toxic powder |
| Primary Applications | Halogen-free flame retardant for polymers |
| Key Features | Surface-modified for improved polymer compatibility |
| Benefits | Reduces heat release rate and smoke density during combustion |
| Decomposition Onset Temperature | ≈180–200 °C (endothermic dehydration) |
| LOI (Limiting Oxygen Index) | Enhances LOI of host polymers by 5–15 points depending on loading level |
Q1: What is the primary mechanism by which Martinal ON-4608 provides flame retardancy?
A: Martinal ON-4608 functions primarily through endothermic decomposition, absorbing heat and releasing water vapor upon exposure to elevated temperatures. This process cools the substrate, dilutes flammable gases, and forms a protective alumina-rich char layer that impedes further thermal degradation and flame spread.
Q2: Is Martinal ON-4608 suitable for use in halogen-free flame-retarded polymer systems?
A: Yes — Martinal ON-4608 is an inherently halogen-free aluminum hydroxide grade specifically engineered for high-performance, environmentally preferred flame retardant formulations. It is widely used in polyolefins, thermoplastic elastomers, and engineering resins where regulatory compliance and low smoke/toxicity are key requirements.
Q3: How does the particle size distribution of ON-4608 influence its performance in compound processing?
A: The optimized particle size distribution enhances dispersion stability and minimizes viscosity increase during compounding. This contributes to smoother extrusion, improved surface finish in finished parts, and consistent flame retardant performance across diverse polymer matrices without excessive torque or die buildup.
Q4: Can Martinal ON-4608 be used in applications requiring good electrical insulation properties?
A: Yes — as a non-conductive, inorganic mineral filler, Martinal ON-4608 supports high volume resistivity and dielectric strength in flame-retarded compounds. Its surface treatment helps maintain compatibility with insulating polymers while minimizing ionic impurities that could compromise electrical performance.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
