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MADP8900 is a high-efficiency halogen-free flame retardant specifically formulated for polyamide (PA) resins—including PA6, PA66, and PA610. Unlike halogenated flame retardants (which release toxic smoke), it is 100% halogen-free (Cl <900 ppm, Br <900 ppm) and complies with global halogen-free standards (IEC 61249-2-21, JIS C 60068-2-11). It delivers UL94 V-0 ratings at 15–20% addition in PA6/66 (1.6mm thickness) and retains >90% of PA’s original mechanical properties—addressing the common issue of halogen-free flame retardants causing brittleness. With a decomposition temperature >320℃ and excellent dispersion in PA melts, it is suitable for high-temperature PA processing (260–290℃). Its phosphorus-nitrogen synergistic mechanism reduces smoke emission by 50% (per GB/T 8627-2017) and meets eco-standards (RoHS 2.0, REACH SVHC), making it ideal for PA-based electronic components, automotive parts, and industrial structural parts.
MADP8900 is 100% halogen-free (chlorine <900 ppm, bromine <900 ppm)—exceeding IEC 61249-2-21’s halogen limit (≤900 ppm total). It contains no heavy metals (Pb <1 ppm, Cd <1 ppm) and complies with global eco-standards: EU RoHS 2.0, REACH SVHC (no listed substances), China GB/T 26572-2011, and JIS C 60068-2-11. This compliance is critical for PA components exported to the EU and North America—especially electronic parts (e.g., connectors) and automotive components (e.g., sensor housings) subject to strict halogen-free requirements. Unlike halogenated flame retardants, it emits no toxic halogens (HBr, HCl) during combustion, improving safety in enclosed spaces.
Optimized for PA resins, MADP8900 achieves UL94 V-0 (1.6mm) at 15% addition in PA6 and 20% addition in PA66—outperforming generic halogen-free flame retardants (which require 25–30% addition). Its phosphorus-nitrogen (P-N) synergistic mechanism works in two ways: phosphorus promotes char formation (condensed phase) to block heat/oxygen, while nitrogen releases inert gases (gas phase) to dilute flammable vapors. In PA66 electronic connectors with 18% MADP8900, the limiting oxygen index (LOI) reaches ≥32% (vs. 24% for pure PA66)—ensuring fire resistance in high-temperature environments. It also passes the UL 94 750℃ glow wire test (GWIT) at 750℃, suitable for high-voltage PA components.
MADP8900’s unique microencapsulated structure and surface modification (polyamide-compatible coupling agent) ensure excellent dispersion in PA melts—minimizing mechanical property loss. PA6 with 15% MADP8900 retains >92% tensile strength (≈60 MPa) and >88% impact strength (≈5 kJ/m²) compared to pure PA6. PA66 with 18% MADP8900 maintains >90% flexural strength (≈95 MPa) and >85% elongation at break (≈25%)—critical for load-bearing PA parts like automotive bracket. Unlike inorganic halogen-free flame retardants (e.g., aluminum hydroxide), it does not cause PA to become brittle, expanding its use in structural applications.
With a decomposition temperature >320℃ and melting point of ≈250℃, MADP8900 is stable during PA processing (260–290℃ for PA6/66). It does not decompose or release volatile byproducts during extrusion or injection molding—preventing die buildup and ensuring consistent batch quality. Its fine particle size (D50≈3–6 μm) and surface treatment enable uniform dispersion in PA melts (verified via SEM), eliminating agglomeration and surface defects (e.g., pinholes) in PA parts. For thin-walled PA components (0.8mm thickness), this dispersion ensures uniform flame retardancy—avoiding weak spots that fail UL94 testing.
| Specification Items | Details |
| Chemical Composition | |
| Type | Phosphorus-nitrogen (P-N) halogen-free flame retardant |
| Halogen Content | Chlorine < 900 ppm, Bromine < 900 ppm (total halogen ≤ 900 ppm) |
| Phosphorus Content | ≈12% (by weight, via ICP-MS) |
| Nitrogen Content | ≈8% (by weight, via elemental analysis) |
| Surface Treatment | Polyamide-compatible silane coupling agent (≈2% by weight) |
| Physical & Thermal Properties | |
| Appearance | Off-white granular solid (free-flowing, no caking) |
| Particle Size | D50≈3–6 μm (by laser diffraction) |
| Density | ≈1.45 g/cm³ |
| Decomposition Temperature | >320℃ (5% weight loss, TGA under N₂ at 10℃/min) |
| Melting Point | ≈250℃ |
| Moisture Content | <0.2% (23℃/60% RH, per Karl Fischer titration) |
| LOI (in PA6, 15% addition) | ≥32% (per ASTM D2863) |
| Formulation Recommendations | |
| Formulation Recommendations | 15–18% (PA6, UL94 V-0 1.6mm); 18–20% (PA66, UL94 V-0 1.6mm) |
| Compatible PA Grades | PA6, PA66, PA610, PA6/66 blends |
| Additives | Compatible with PA stabilizers (e.g., heat stabilizers, UV stabilizers); no additional compatibilizers needed |
| Processing Temperature Range | 260–290℃ (safe for PA extrusion/injection molding) |
MADP8900 is widely used in PA electronic components like PA66 connectors, PA6 sensor housings, and PA66 circuit board supports. PA66 connectors with 18% MADP8900 achieve UL94 V-0 (1.2mm thickness) and meet IEC 60335-1 (electrical safety) for household appliances. For PA6 sensor housings in EVs (electric vehicles), it withstands 120℃ under-hood temperatures and retains impact strength ≈4.5 kJ/m²—ensuring durability. It also reduces smoke emission during fires, protecting sensitive electronic circuits in devices like smartphones and industrial controllers.
Automotive manufacturers use MADP8900 in PA-based parts: PA66 engine brackets, PA6 wire harness clips, and PA66 battery components (EVs). PA66 engine brackets with 20% MADP8900 comply with FMVSS 302 and retain ≈90 MPa flexural strength—supporting engine vibrations. For EV PA66 battery terminal blocks, it meets UL 94 V-0 and has excellent electrical insulation (volume resistivity >10¹⁵ Ω·cm)—preventing short circuits. Its halogen-free nature also aligns with automotive eco-standards (e.g., EU ELV Directive), reducing end-of-life disposal risks.
In industrial settings, it is used in PA6 conveyor rollers, PA66 gear wheels, and PA6 pump impellers. PA6 conveyor rollers with 15% MADP8900 resist wear (abrasion loss <0.5 mm³ per 1,000 cycles) and meet fire safety standards for factory conveyor systems. PA66 gear wheels with 18% MADP8900 retain >85% tensile strength and operate reliably at 80℃—suitable for industrial machinery. Its low moisture absorption (<0.2%) prevents PA parts from swelling in humid environments (e.g., food processing plants).
MADP8900 is suitable for PA films (e.g., packaging films) and fibers (e.g., industrial textiles). PA6 packaging films with 12% MADP8900 achieve UL94 VTM-0 (thin film rating) and are used for flame-retardant packaging of electronic components. PA6 industrial fibers with 15% MADP8900 meet ISO 1210 (flame retardancy for textiles) and are woven into fire-resistant curtains for factories and commercial buildings. Its dispersion efficiency ensures uniform flame retardancy in thin films/fibers, avoiding weak spots.
It is specifically formulated for PA6, PA66, PA610, and PA6/66 blends.
Yes, it is 100% halogen-free (Cl <900 ppm, Br <900 ppm) and complies with IEC 61249-2-21 and JIS C 60068-2-11.
It reaches UL94 V-0 (1.6mm) at 15% addition in PA6 and 20% addition in PA66.
It retains >90% of PA’s original mechanical properties, avoiding brittleness common with other halogen-free flame retardants.
