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Phosphorus-nitrogen synergistic intumescent system delivering UL 94 V-0 rating in polyester composites at low loading levels.
Zero halogen content—compliant with RoHS, REACH, and IEC 61249-2-21 for environmentally responsible electronics and automotive applications.
Excellent thermal stability up to 320 °C, enabling compatibility with standard polyester melt processing (e.g., injection molding, extrusion).
Minimal impact on mechanical properties—preserves tensile strength and impact resistance of host polyester resins (e.g., PET, PBT).
Low smoke density and negligible corrosive gas emission during combustion, meeting EN 61034 and EN 50267 standards.
Flame-retardant polybutylene terephthalate (PBT) for automotive connectors and under-hood components.
Halogen-free flame-retardant polyethylene terephthalate (PET) used in electronic housings and power supply enclosures.
Injection-molded polyester parts for industrial control panels requiring UL 94 V-0 compliance.
Extruded polyester profiles in rail interior applications where low smoke and toxicity are critical.
Blends with glass-fiber reinforced polyester for structural components in renewable energy inverters and battery management systems.
| Chemical Type | Phosphorus-nitrogen intumescent flame retardant |
| Product Form | Free-flowing white granules |
| Appearance | Off-white to light beige granules, uniform size distribution |
| Primary Applications | PET, PBT, and modified polyester thermoplastics |
| Key Features | Halogen-free, low smoke, UL 94 V-0 achievable at 18–22 wt% loading |
| Benefits | Processing stability, no plate-out, excellent dispersion in polyester melts |
| Density (23 °C) | 1.38–1.42 g/cm³ |
| Moisture Content (max) | 0.2 wt% |
Q1: What types of polyester resins is Deflamer LFR-8008 compatible with?
A: Deflamer LFR-8008 is specifically engineered for use in unsaturated polyester (UP) resins and modified polyester systems commonly employed in composites, gel coats, and casting applications. It demonstrates good compatibility and dispersion stability in both orthophthalic and isophthalic polyester matrices.
Q2: How does LFR-8008 achieve flame retardancy without halogens?
A: LFR-8008 operates primarily through an intumescent mechanism — it promotes the formation of a thermally stable, insulating char layer upon exposure to heat or flame. This char acts as a physical barrier that limits heat transfer, oxygen diffusion, and volatile release, thereby suppressing combustion without generating corrosive or toxic halogenated smoke.
Q3: Does LFR-8008 affect the mechanical properties or processing behavior of polyester formulations?
A: When incorporated at recommended dosage levels, LFR-8008 generally maintains good retention of tensile strength, flexural modulus, and impact resistance in cured composites. It exhibits low volatility and minimal interference with resin gel time or cure kinetics, supporting standard processing methods such as hand lay-up, spray-up, and RTM.
Q4: Is LFR-8008 suitable for applications requiring low smoke and low toxicity during fire exposure?
A: Yes — as a halogen-free solution, LFR-8008 significantly reduces smoke density and eliminates the generation of hydrogen halides or dioxin precursors during thermal decomposition. It is well-suited for environments where fire safety standards emphasize smoke suppression and reduced acute toxicity, such as transportation interiors and building panels.
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